Hammarlund HQ-140-X Repair and Restoration

Everything you need to know about the Hammarlund HQ-140-X Receiver (and more) in one video. Included in this video: A correction to a mistake in Hammarlund's alignment procedure. Important "missing" instructions to the alignment procedure. Lots of troubleshooting tips and tricks. See the performance of this receiver as aligned to factory spec's. Follow along beside Paul through the entire alignment, troubleshooting, repair and restoration procedure of a fantastic communications receiver. FOR MORE information, click the "SHOW MORE" tab right below this box.
Heathkit signal tracer video:
• Signal Tracer Troubles...
Spectrum analyzer protection video:
• Build this Spectrum An...
Video Facts:
*Creation time: 1 month start to finish. (excluding editing time)
Video size as uploaded in MP4: 19.7Gigs. (before compression: 32 Gigs.)
*Individual video's within this video, edited together: 42
*Still pictures: 2. Taken by Marie (my other half :^)
*Still's camera: Canon 5D Mark II.
*Video Camera: Canon Vixia.
*Audio: XLR balanced to camera. Customized vacuum tube condenser microphone. Applied Research and Technology "ART Voice Channel."

[@thomasmoore8142]

Thanks Paul, especially for the SSB tips on overdriving the sensitivity.

[@plumbersnightmare2354]

I have watch a number of Mr. Carlson's videos in the past few years. All of them are great, but so far, this one is the best of all. Having walked by many of these HQ-140's at Ham swaps over the years, I may just bring the next nice one home. :-)

[@orange70383]

Let me say that Mr. Carlson you do much more than give generously of your electronics knowledge, you bolster ones faith in their fellow man. Your teaching is very much appreciated on many levels, Thank You'

[@85eldon]

P hb.

[@pastorlarry7470]

I love these old radios they have so much personality

[@emailshafihusain]

I wish if we could have more people like you. This level of detailed knowledge about radio repair is just so rare to find..

[@fauxnoodel]

L

[@fauxnoodel]

Qwqwq we

[@fbetti9]

in spite of its length, this is by far the most enlightening video I've seen on the subject as he exposes rarely talked about intrincacies. worth watching every minute

[@wesleyteal2297]

Just yet another find example, of the Mr Carlson letting up ride along in his time machine. Loved the part of him showing us what this beast will do. Thank you so much for all you do ,I'm glad to support his channel and be a Patreon.

[@rubennb4r256]

Hello Mr. Carlson, I obtained my Associates Degree in Electronics about 40 years ago. I have been in the electronic/Electrical workplace for about 50 years. I went into electronics in order to do the exact type of work you are doing. Board level repair. It seems I have been in Industrial Instrumentation , Telecommunications and general electrical. Drat. I have retired now and found your channel. You are giving me great experience in troubleshooting and repair of an array of electronics. I probably won't do it professionally, but I will do it for pleasure. I have two old receivers in upright wooden cabinets. I am ordering parts to replace the ones already there. Thank you very much. I don't have your test equipment. I hope I have enough to at least do a fairly good alignment. Thanks again. Keep the video coming!!

[@TheHypogriphQc]

While sleeping, I was following a course about this in french with visual representations, once the video started my teacher restarted the whole course and started speaking english as in a new english student walked in the classroom then woke up to this video at 6 minutes. I'm mindblown.

[@shanookflc]

What can I say Paul the amount of work you put in to all your projects you are truly a perfectionist at what you do. The best three hours watching a genius at work. thank you so much Paul for sharing all this with us. You just amaze me all the time you treat all you projects with the respect they deserve you have some lovely radios they don't make them like that any more. I honestly I don't think there is nothing you can't fix. and when it comes to restoration you are number one the work to details is perfection.

[@arctos49]

Hello Paul - I just wanted to thank you for this excellent video. About 16 years ago I had an HQ-140X and it was one of the most enjoyable receivers I have ever used. It was just a lot of fun to operate and I remember how sensitive and stable it was. I was able to tune in a German ham operator on 10 meter SSB and even at that frequency it wasn't necessary to "touch up" the tuning to keep him intelligible. Very impressive. Hammarlund did a beautiful job in the design and manufacture of this receiver and I would like to find another one but they seem to be getting fairly rare, especially in the condition yours is in. Anyway, thanks for the excellent tips on restoration and alignment and the trip down memory lane with the "band cruising". Your videos are excellent and very informative. 73, Bruce K6RQR

[@MrCarlsonsLab]

I'm glad you enjoyed the video Bruce. Thank You for your kind comment!

[@jwingo7257]

I am in awe of the level of your knowledge, humbleness and genuine willingness to share, explain and teach this highly technical and unique skill set. Thank you. I find your videos highly entertaining and fascinating. I have no experience in ham radio or electronics but you make me want to learn more about how radios work and were made decades ago. It’s amazing what people have invented and created. It makes you realize the amazing gift we have been given. God bless you. Jim Wingert Jupiter, FL

[@josephhammond9367]

Sir just want to convey my extreme oppression for the time and effort you put in all your video's. love of the craft really comes through and it's that same love of watching my father work on the electronics of my youth this is where my love of all things electronic. Thank you the craft you teach in invaluable too us all and is very much appreciated. God bless you and yours. Thank you for giving so much of your time.

[@MrCarlsonsLab]

Thanks Joseph, Glad to share!

[@stuartthegrant]

The "Tuner Capacitor" is a work of art Paul. I think you have a unused receiver there. Any drift can be put down to age. My word you don't muck about with your vidio's. 10 out of 10 for expertise and just about everything else.Stuart.

[@MrCarlsonsLab]

Thanks for kind comment Stuart!

[@WCM1945]

I agree. I think I would have checked the spades on the power plug to see if it had ever even been plugged in!

[@TheRadioShop]

Paul, that was simply amazing. The knowledge you have and the way you present your repairs are incredible. I started watching this video right after you posted it. Was working in the shop while doing so and just found it astonishing. Very well done on this relic.

[@MrCarlsonsLab]

Thanks Buddy!

[@624radicalham]

Once again Mr. Carlson you blow us away with your meticulous work and have uploaded yet another historical document! It's bittersweet for me because months ago I saw in one of your videos that you had an SP-210 sitting around, the radio I own, and I had been meaning to ask you to document and work on one of those early Hammarlunds. I was encouraged on your video to hear you've got a couple pending on the bench, so brother I hope you work on and upload an SP-210 as there are substantial differences in the older sets that could help many of us out. That's my X-Mas wish!

[@stefflus08]

It's been a wait, but it was worth it! The last couple of videos I've actually started worrying about you a few days before it came out; "what if he got a shock, or there's a forest fire and so on and so forth.." High point for me was the finding of the noisy part. I'd love a video on that probe.

[@MrCarlsonsLab]

Thanks Steffen. I will do a probe video soon.

[@stancook6933]

Got my start in rf with this radio. Got one from a neighbor when I was 10 years old. 56 years later feeling really sorry I don't still have it.

[@MrCarlsonsLab]

Thanks for sharing your story Stan!

[@rdyess2010]

The radio of radios! This reminds me of my grandfather who loved radios. On new years day he usually had the main TV, a portable B&W TV and three desktop radios all tuned to different games. It was insane but the man could multitask and the whole town came to him to find out the scores. He also had a Zenith AM/FM tube radio at his bedside and usually listened to AM shows all night long. His last favorite radio was a Cobra 29 CB transceiver.

[@kaybikerow]

This video was a pleasant surprise find. I have an HQ-140 which has been sitting idle for decades. You've inspired me to have a look at it and start restoration.

[@MrCarlsonsLab]

Glad to be that inspiration!

[@tabaccopuro]

Geez, great video. Your skills are just mind blowing. I haven't seen one of the Hammarlund radios in 38 years and they were rare antiques back then. We used to sell them "as is" in a CB shop back in the 80's. I thought they were old military radios back the 80's because they were built like tanks.

[@lemondemon1674]

Fantastic job Mr Carlson! I was waiting years for electronics teacher like You!! It couldnt be better, greetings!!

[@13BTRX3]

I'm really getting a lot of enjoyment from your videos. A search for a better understanding of vacuum tube operation led me to your channel. I really enjoy the format of your videos. Although a lot of content is above my head, your attention to detail is very obvious. Thank you so much for inviting us into your lab!

[@raccoonnyc]

I really liked the audio noise troubleshooting part. Another great video.

[@shawn_530]

I just started becoming interested in electronics when I felt compelled to attempt fixing an old radio that I have. Most of the content on your channel is WAY too advanced for me, but your knack for explaining things, and your passion for what you do make your videos absolutely addicting. I've even learned a thing or three along the way. Thanks. - Shawn

[@MrCarlsonsLab]

Glad your enjoying Shawn!

[@dri50]

Sat through the whole video and really enjoyed! Takes me back to my early days at Votech around 1969 where Vacuum Tubes ruled and we spent just a couple of weeks on transistors. It also brought back fond memories of building a 2 & 6 meter Heathkit. Wish I still had it ! Thanks for the video.

[@dougankrum3328]

..That has to be the cleanest piece of equipment I've ever seen on your workbench...!

[@gfl1957]

These are great radios. I was in the Hammarlund factory many times. My best friend in High School was Lloyd Hammarlund Jr.

[@LeeBlaske]

I can't believe those knobs. I've been a licensed ham since 1967, and have been to countless hamfests, and I've never seen one like that!

[@TheFunkman]

I'd really love to see an FM alignment video. Keep up the great vids!

[@Me11oIngenuity]

Your hard work on this video is acknowledged and appreciated. Thank you, Paul.

[@brookerobertson2951]

Feel the same.. couldn't agree more..😊

[@joelperry9348]

The final product demo in the end was an awesome reward for the hard work of following the front of the video. All most appreciated. I think I have a "virgin" Hammarlund HQ-215 that was retired not later than 1965. It looks like it was used by a novice with a Heathkit DX-60/HG-10 combo which I also have and that also appears to be in the same old fine in the 60's state. The HQ-140 is amazing, but it sure would be nice if I could pay my Mathematics teacher pay to have this Hammarlund HQ-215 safely work nice by someone with the first/last initials "PC". This is the wrong forum for such an appeal, and I hope it was not too obtrusive. I'm good in QRZ. Joel ~ KN4EWI

[@larryk4mu240]

Hi Paul, well done! The video is a volume of good information. Both video and explanations of each procedure was outstanding. This one will be referenced by many and useful for everyone. 73

[@b3j8]

A ham buddy of mine had a 140x just like this w/the large knobs. Picked it up at the Dayton Hamvention in 1989. He loved it!

[@FredGandt]

0:00:00 - 0:01:30 | Intro 0:01:30 - 0:09:12 | First look outside 0:09:12 - 0:12:25 | First look inside > top 0:12:25 - 0:16:21 | First look inside > bottom 0:16:21 - 0:23:33 | Testing paper caps for leakage 0:23:33 - 0:25:05 | [SPOILER] Replacing caps 0:25:05 - 0:31:37 | First power up, functionality walkthrough and rough diagnosis 0:31:37 - 0:35:28 | Testing broadcast band alignment 0:35:28 - 0:37:58 | Looking at engineering-porn tuning capacitors 0:37:58 - 0:40:49 | Cleaning the dials 0:40:49 - 0:41:28 | Aligning the dials with their windows 0:41:28 - 0:45:58 | Looking at the schematic and notes on test gear connection for alignment 0:45:58 - 0:47:55 | Attaching spectrum analyser 0:47:55 - 1:12:23 | Initial spectrum analysis of IF alignment After many hours of IF alignment... 1:12:23 - 1:33:42 | Explaining the IF alignment procedure with spectrum analyser and manufacturer spec. sheet 1:33:42 - 1:37:22 | Explaining the Beat Frequency Oscillator alignment 1:37:22 - 1:40:54 | Beginning the aligning of the Antenna, RF and Oscillator sections 1:40:54 - 1:52:54 | Notes on manufacturer's published alignment procedure including their error and omission 1:52:54 - 1:56:14 | Setting up for alignment 1:56:14 - 2:03:22 | Alignment using an oscilloscope or Vacuum Tube Volt Meter 2:03:22 - 2:08:59 | [SPOILER] Something's not right 2:08:59 - 2:24:09 | Troubleshooting with RF probes and a signal tracer 2:24:09 - 2:26:25 | Ready to test the restored receiver 2:26:25 - 2:30:03 | Listening from .54 to 1.32 Megacycles 2:30:03 - 2:31:42 | Listening from 1.32 to 3.2 Megacycles 2:31:42 - 2:33:00 | Demonstration of noise limiter 2:33:00 - 2:34:37 | Listening from 3.2 to 5.7 Megacycles 2:34:37 - 2:36:36 | Using the BFO to tune in on side band 2:36:36 - 2:37:44 | Listening from 3.2 to 5.7 Megacycles cont. 2:37:44 - 2:38:38 | Manually tracking a moving signal 2:38:38 - 2:39:48 | Listening from 3.2 to 5.7 Megacycles cont. 2:39:48 - 2:45:02 | Listening from 5.7 to 10 Megacycles including more side band and noise limiter action 2:45:02 - 2:50:51 | Listening from 10 to 18 Megacycles 2:50:51 - 2:54:14 | Listening from 18 to 31 Megacycles including using the BFO to tune in on a Morse code beacon 2:54:14 - 2:57:35 | Final notes and reminders for alignment 2:57:35 | Outro

[@scptime1188]

Deserves more likes, helped alot!

[@tylerpferrari]

Amazing, thanks for this!!

[@tjeshhh5026]

AaAAAAAAAa

[@Frankowillo]

You have way too much spare time on your hands.

[@FredGandt]

@@Frankowillo If a job's worth doing, do it properly ;)

[@papaloongie]

Thank goodness for mr Carlson !! I've got a 100, a 170 and a 180. This sure will help.. Thank you, sir

[@MrCarlsonsLab]

All real nice receivers! Glad your enjoying. Thanks!

[@wansolve2036]

I've been using and repairing old radios like this for years and I absolutely agree with you. There's several things I do as a matter of course in troubleshooting, diagnostic, or repair that I'm not sure is documented anywhere. Just some tips I got along the way from my Elmer or others kind enough to share. Thank you for taking the time to do this, I enjoyed every minute of it, especially the Crystal Filter and IF Alignment. I'm getting ready to revive an old BC348 and was dreading working on the Crystal Filter section. You provided a great refresher!

[@miked.4738]

You know, I've had, HAD, near every piece of great vintage gear from flea markets and repaired them. Rented semi trailer space for all of it, till I got to old age, then it was only right to pass them on to good homes. Even though rigs got highly complex, I worked rcv/xmit combos and worked 100 countries with boat anchors. Your intellect and magic you do to the past is commendable .

[@hankus253]

Having built almost every Heathkit receiver made, it was fun to watch the alignment on this Hammarlund. The principle and tools used brought back a lot of memories. Good job Paul.

[@MrCarlsonsLab]

Thanks!

[@Brullstories]

i was watching how someone got hurt when i went to sleep and woke up to this 😹

[@davidstelmack6899]

LOL I JUST WOKE UP TO THIS TOO!!! Fell asleep for who knows how long and this is what's on!

[@journey8187]

Same 😂

[@ReinoudVanBeek]

Same

[@patrickvoortman1422]

Same lmfao

[@WilliamTresnon]

Same wtf

[@bucyruserie1211]

Hi Mr. Carlson, I have to agree that's one Great looking receiver. It is amazing to me that you have the ability to make me WANT to watch a 3hr long video, on a piece of gear I will probably never own! Your thoroughness in explaining and examining each feature of the unit, why said feature's are there, how to test all components, and how to replace faulty parts is unparalleled. Your enthusiasm for this vintage gear is infectious.... It makes me want to run out and hunt down one of those old "boat anchors". I could go on praising you for all the effort you put into making these videos, but I think you get the point............ Great Job, Thumbs Up, Please keep posting these great old pieces of tube equipment!!!! Thanks, Tom By the way Paul, I would purchase those old caps from you if your just going to through them away.... Let me know.. Thanks again for posting :)

[@henryyang478]

3 hours of joy that is, wowie!

[@jonyzhu6531]

你好啊，你也喜欢看 Mr Carlson 的视频 ：）

[@henryyang478]

猪枣泥 啊你好。他的视频内容都很轻松有趣，每次都拿来像看电影一样看

[@jonyzhu6531]

你是做这一行的吗？在国外？

[@henryyang478]

兴趣而已

[@MrCarlsonsLab]

Thanks for your kind comment! Glad your enjoying the video's :^)

[@markanderson350]

You do the finest explanations. This time you edited out the actual repairs. No mater what, I always learn and you back up what you do with solid explanations and proof.

[@JohnGotts]

I appreciate the time and effort you put into your videos.

[@FernandoelChachi]

It's amazing seing such a young person with such a knowledge of these vintage machines.

[@no_more_free_nicks]

me too

[@Mr549er]

me too :-)

[@davem.740]

👍👍👍

[@OnTheAir]

The HQ-140X was my Novice receiver. I purchased it for $100 in 1960. Very sorry I ever sold it. I loved it!

[@fredarchibald7298]

Very informative and very well done! I've aligned many old radios, but I still learned a number of things from this video! One suggestion: your spectrum scope H-P 3585B is a beautiful instrument, but I'll bet that almost no-one viewing the video has anything that good. It would be very interesting (and much more useful by much of your audience) to see how you do the alignment with a more humble (and much more common) set of instruments. For example, an old Tek scope (like my 453), the sweep from a general-purpose function generator, and a frequency counter. Thanks again for this video! Fred VE1FA

[@xjohnlangerijs527]

There is teachers & there are masters. Masters are those, who can tell in a life-ly way, while keeping it simple 4 every-one 2 understand. That REALLY takes... skills! Much appreciation 4 those... who take da time 2 do this! Namasté.

[@bulwinkle]

So much here that I'm going to have to watch several times. I don't mind waiting for content when it's this good.

[@gaskar5135]

W we we ss errs sex sees ded dress dress sex ded ded ez ears ss ded ded e ded sees s era sees free r ded ded dress ded dress dress ez red ez dress era s TX ded dress da da sets da da xrr era car fax F ded ur fed ded ded fed fax da da da Adam da dads da da da da da dad’s dad’s ez dads dads dads dads dads fed fed fed ex F dads dads dads dads dads dads dads dads era dads dads dads FF’s dads dads fax dads fax c tree fed fed fed fed da dads dads dads ded dads dads dads dads FF’s FX fed FF’s FF’s fed d ccc dads dads dad’s dads dads dads dads dads dads FF’s x are FF’s dads dads dads s red are dead

[@AntiqueRadioandTV]

Wow... You know I love sagas! I would have pulled out the popcorn but I watched it first thing in the morning. Too early for popcorn. Great information here and what a beautiful performer this radio is. All those alignment tips will come in real handy! I also loved the way that you isolated that noisy passive component with that non-conducting probe. Now I know the real reason for the noise generator function. Works a treat. The video, I think, could use one more thing. "Intermission!" Great job Paul as always, Tom

[@MrCarlsonsLab]

Thanks Tom!

[@materialsguy2002]

Paul: There is so much good information here that I am replaying and taking notes. Double thumbs up and thank you for your efforts!!!

[@MrCarlsonsLab]

No problem Shaun. Glad your enjoying!

[@C6438911]

I'm not an engineer or analyst or electrician at all (I know a little bit about it, but not much). I find these video's fascinating! Thanks for sharing your testing/reviewing/repairing/restoring video(s). Absolutely great!

[@graemedavidson499]

That's an amazing find - always enjoy watching your excellent videos. Those ceramic stand-offs on the filter cap are a great idea!

[@MrCarlsonsLab]

Thanks, I have owned it for some time now, but wanted to save it for a video. Many more receivers in the waiting.

[@davidchapman2839]

I love your restoration videos and learn something from each. For instance if someone else told me I might need a wobbulator I would chuckle and say "yah right, I already have chrome reverse muffler bearings". But now I find myself looking for an entry level wobbulator...

[@bergarteric5713]

Mister : only one word : THANKS !!! perfect , for me your job and knowlege is a pure joy and i'm learning many , many things !!! please continue your video and i hope many beautiful thing for you and your lab's !!! Eric from France ....

[@cindylawrence1515]

I had a HQ-180 JX with the fixed xtal accessory but it had Maroon dials. That rig was the absolute match or better for any of the Collins set ups I ever saw in actual operation. My brother was an extra class and he always wanted the best. Some years ago we bought a SP 600 JX for $300 in great shape. That rig is amazing for the time it was produced. The SP has the greatest audio i ever heard from any tube era radio including two restored E.H. Scott's Ive heard.. As a kid a neighbor worked in a sub section of Hammmerlund on far west 34th Street in Manhattan. Most of my family were hard core National radio/HRO fans.....

[@ronniepirtlejr2606]

Wow! I don't know anything about these radios Mr. Carlson But I know quality and Beauty when I see it! I'm sure glad you are on here passing your knowledge on to other people on how to keep these things going. I am just a hobbyist, but I'm going to guess that they just don't teach this stuff in school anymore? Everyone seems to be in to micro Electronics. Some things just cannot be replaced!

[@GIJoe2at]

I never cease learning electronics when I follow these dissertations. It is always a pleasure. Keep going...

[@MrCarlsonsLab]

Thanks James! Glad you enjoyed.

[@crocellian2972]

The marathon videos are great when you take us carefully through the process. Stuff like this is rarer than hen's teeth today.

[@46bovine]

Mr. Carlson, another great video. i didn't see this until almost three years after its release. I Great work., I'm impressed.

[@WCM1945]

Wonderful vid! Really enjoyed it. I'm a retired two-way tech, so my experience with AM stuff harks back to my earliest days. But in those early days, I was taught _in no uncertain terms_ that the "l" in the word "solder" is never pronounced. It was "sodder". I guess times have changed, though. Still, this little bit of shop talk reminds me of when I was considered competent at something.

[@BruceNitroxpro]

Bill Martin , I made the same observation and was told that IN CANADA, they pronounce words differently! DAMN! He was right. LOL de KQ2E

[@bparker86]

Wow Almost a million views Mr Carlson! I know this is an oldie but I enjoy going back and watching you go through these old am radios. Well anything really your videos are a treat to us nerds lol

[@ianbutler1983]

Thanks Paul. I am not sure about those brown knobs they used though. I have seen many original ads for those receivers, but they were in black and white, so I never knew the color of the them. A matter of taste, I suppose. You seemed to like them, and the object is to preserve the radio as closely to original as practical. I appreciate your efforts in making the highest-quality videos I have ever seen on youtube, without regard to the subject. You seem to know just when to skip over things and when to slow down and show details. P.S.-I love the marathon videos! 3 hours of viewing pleasure.

[@denniscarlson1262]

I'll bet the knobs matched the tuning window bezels' slate color when they were new. My 1958 Heathkit Signal Tracer had fluted knobs of same apparent style as on Paul's HQ-140x. They were colored gray to match the panel when new. They have also aged to "milk chocolate." No significant exposure to sunlight. Just an unstable colorant. Totally agree: Mr. Carlson's lab videos are the best.

[@PaulaXism]

ooooo.. Been waiting for this.. going to cook our lunch and then settle down for some quality educational video. I love your videos, keep up the great content.

[@MrCarlsonsLab]

Thanks!

[@Pwaak]

I appreciate you explaining alignment and the application of various test gear...Thank You! Super Fine Radio!

[@clytle374]

So been keeping an eye out for one of these. One showed up for way too much money 3 months ago, finally came to an acceptable price last week. It's a 140-XA, Only 4 electrolytic caps and no paper caps. Waiting on caps to arrive then to start this, thanks for the video! Found reproduction dials, mine are all warped up.

[@allancady3990]

Hi Cory, I've had my dad's HQ-140-XA sitting on a shelf for a couple years, and I'm about to order replacement caps to put in before I try plugging the beast in. I've found a couple surprises on inspecting the circuit that's supposed to have the one paper cap (at least, the parts list says C38 should be paper). I wonder if you would be willing to be in touch somehow to compare notes? I could send you a couple photos and let you know what I'm looking at. If you're interested, we'll figure out how to be in touch. Thanks.

[@Nolosers36]

I like to having KZbin open while I sleep and I just woke up to this extremely confused I don’t even know what a hammarlund HQ-140-x is but now I know how to restore and repair one.

[@MrCarlsonsLab]

The best part is, you will be so good, you could do it in your sleep!

[@mUbase]

Hi Mr Carlson. Oh I love your restoration videos. Fascinating and you are so very careful, knowledgable and meticulous it hurts sometimes. My first reaction to seeing the Hammarlunds chassis was for my jaw to literally drop open!! Beautiful. x .

[@bashisobsolete.pythonismyn6321]

watching in 2020. Mr C is one of those great teachers i wish i had back in the day.

[@dhansel4835]

That tube receiver has a mellow sound that you just don't hear any more. Great Video.

[@arongooch]

Got this video running in the background as I work on restoring an old vintage computer. Love these extra long videos whilst working on some old vintage gear :)

[@MrCarlsonsLab]

Glad you enjoying Aron!

[@fishyrider3528]

Hey Paul. The work on this kind of long and in depth video is just taken for granted by most. Must be really chalenging douing the restauration with added cinema filming labour. And editing. I can only imagine the amount of work and dedication. But the finished product is worthy of movie avards. Or at least documentary materion on Discovery channel. Thank you and respect. Hope to see more like this soon. Maybe an sp600? PS. A quick vid with math for the impedance matching box? I need it for 50 to 300 ohm. So math would be apreciated. Thank you. I support on patreon aswell. You are a tresure for us hobby boys!

[@petersvan7880]

Great video, thank you! The signal tracer / probe part that showed the crackling components is very interesting, wasn't aware of this function.

[@rickscott7350]

My First Ham Station was a Hammerlund HQ-110C and a Heath DX40. Love the Hammerlund receivers.

[@rebelba42]

...been waiting for this too. 3h felt like 30 minutes. I like your longvids :) Thanks for another great lesson!

[@Oopsie223]

Don’t think you could be more thorough. Thanks for a good vid. Your voice is also very soothing

[@KG5CUO]

I love Shortwave :) Started out with a Am transistor radio as a kid then graduated to shortwave I love it!!!!!! always have lots of things can be tuned in world radio you can here stations depending on the band 234 / design frequency = each dipole side length in feet, OR - 468 / design frequency = total length in feet. Most builders cut long and trim the total length for lowest swr on their design frequency. for the Antenna!!! and you can here the world! this rocks and as a ham now I have taken my love of radio not only talking and tuning in but also learning and refurbishing them some day :) but if you use this in a 2 sided dipole you use a 50 ohm line for the best receiving and you can divide the total length on each side you can here radio in France and Japan UK Germany Havana CUBA, Spain all over the place I love radio always have always will. Even Russia and other places no min use English depending on time of day and Space weather Forecast if no sun flairs are interfering with the band you can here a lot of stations coming in...

[@KG5CUO]

Great job man great representation it takes a lot of time..

[@heathwellsNZ]

Wow! This has to be one of, if not, the best videos of this genre/subject/topic. Thanks so very much for taking the time to produce and publish this!

[@buddyhoover57]

I can only dream of having a communications receiver much less one of this quality. Keep up the outstanding videos.

[@Wassenhoven420]

Why are you unable to get one?

[@jime386]

Even though I know squat about electronical stuff, I sure enjoy this electronical stuff. I wish my High School teach was as involved as you are. I might have made a difference as you do

[@dougankrum3328]

Yeah...a lot of this stuff is a little 'over my head' but the presentation is well worth the time to watch...! I grew up in the 50-60's...Hammarlund was a top quality name....

[@jime386]

Doug Ankrum yup... kinda weird....butt hey ...get it while we are alive

[@BruceNitroxpro]

@@jime386, and thank goodness for KZbin for memorializing this kind of knowledge for us all. When he's gone, it's NOT gone, thank goodness.

[@jime386]

@@BruceNitroxpro yes, but it will all go away when the electricity shuts down. Impossible you say? Look up "Carrington Event"

[@BruceNitroxpro]

@@jime386 No, "Beware the EMP event?" LOL I'll lose my Internet, so... oh well! At least my OLD stuff will probably work!

[@gkruntz]

Great video Paul! Still looking forward to a video about that modified laminator of yours! :) Thanks again!

[@nbreeden]

I don't comment very often however this a truly great video. I learned a lot and throughly enjoyed it.

[@MrCarlsonsLab]

Thanks Neil!

[@waynecarlson3736]

Paul I sure am mesmerized watching these repairs. Thank You

[@MrCarlsonsLab]

Thanks Wayne! This is my longest video to date.

[@MichaelLloyd]

I've never understood the noise function of the signal tracer until now. Great video Paul!

[@MrCarlsonsLab]

Thanks Michael. Many components "in tube circuits" can even be left installed when this test is used as well.

[@zhornz]

ı watch these channel because ı love nostalgic devices so much. for example: tube tvs, tube radios ...

[@judywhite82]

I love all the DXing at the end. fantastic video! thanks!

[@MrCarlsonsLab]

You're Welcome Judy!

[@ka0kuj599]

Excellent Paul. I'm aligning my Drake R-4C. I can hear your tips and knowledge in my head as I work! 73, W0KU.

[@sumacmacarthur3380]

Thanks for your patient explanations Mr Carlson, much appreciated!

[@MrCarlsonsLab]

You're very welcome!

[@hadireg]

Wow that's an awesome gift to the world! THANK YOU!

[@Backtothefutureradios]

Great video! Thanks for sharing! I would like to see hookup and alignment using sweep and an oscilloscope as most folks dont have a spectrum analyzer. Thanks for all the great content of your videos! Take Care-Larry

[@Backtothefutureradios]

BTW, where on AM do you hang out, Id like to see if I could work into Canada on the old HT-37? Thanks Larry W4PJP

[@Radiocruncher]

Wow Paul,that was a mega video. Took me 6 sittings to get through it. What an amazing receiver and an awesome job on the alignment. Great work. Graham

[@MrCarlsonsLab]

Thanks Graham!

[@andreisocherel3954]

3 Hours of the amazing Mr. Carlson... Perfect..

[@BoboLaTuque]

Mr. Carlson, that is one of the BEST videos I have ever seen. Thank you. In the very early 1970s I got into shortwave listening. Started out with a very small Hallicrafters SX-125, moved to a Radio Shack DX-160 then a Radio Shack SX-190. Got my ham radio license in 1977. In 1981 I graduated from Community College as an "Electronic Servicing Technician. I sucked at that. Oh well. In 1983 I got a job as a Coast Guard Radio Operator, which sort of put an end to my amateur and shortwave listening endeavors. But NOW I am retired! I have a great Kenwood continuous-coverage receiver, and I think I might just find a good apartment-type antenna and get back into the whole shortwave listening thing. By the way... the speaker atop that Hammarlund... Isn't that a Hallicrafters speaker?

[@travis4798]

It looks like the company took great pride in building this to be very clean inside. No doubt some very smart engineer's designed this unit to last a very long time. It's funny because some people find abandoned tube tv's or radio's in old houses or laying out in the dessert, they apply some power and they fire right up!

[@greggaieck4808]

Mr Carlson when repair restoration is cool

[@jameswades3621]

I’m impressed. Excellent quality video, organized, linear approach to the topic. Excellent information.

[@bergarteric5713]

Mr Carlson you are the best !!! Really top cool .... I love your presentation : too much pedagogic and for me ( a tech in BF ( 60 years old ) i'm very modest about my knwolege i can understand your explications and for me in France it's a gift !!! for me . Please Mr Carlson continue your Videos and AGAIN THANKS for the Share really Merci Merci Beaucoup !!! Eric from France God Bless You and your Familly Good day for you !

[@theduckisok]

That Hammy is in WONDERFUL shape. Hope it's yours not a customer's.

[@diregremo]

That thing is beautiful. Great video.

[@mikefinn2101]

Glad you made this video as I am working on mine now. I need to make the probe interface boxes. I wish I could just buy ones from you and I can't make a printed ckt board so mine will not look so nice. thanks Mike

[@yandyyay]

Great video, slowly working my way through the back catalogue of older videis, I don't do tube stuff but find your work very fascinating and easy to understand. Think I'll stick to low voltage silicon, high voltages scare me ☺ thanks for sharing all this stuff

[@MrCarlsonsLab]

You're welcome!