1940's Forestry Radio Receiver And Transmitter [Teardown With Circuit Description]

Let's look inside this old radio transmitter/receiver combination and see how it works! This is a fantastic example of 1940 style engineering. Will the receiver come to life? Lets find out!
To learn electronics in a very different and effective way, and gain access to Mr Carlson's personal designs and inventions, visit the Mr Carlson's Lab Patreon page here: / mrcarlsonslab
#learnelectronics #repair #restoration

[@MrCarlsonsLab]

To learn electronics in a very different and effective way, and gain access to Mr Carlson's personal designs and inventions, visit the Mr Carlson's Lab Patreon page here: www.patreon.com/MrCarlsonsLab

[@timbersrcadventures]

that transmitter is from my town kamloops bc. very interesting how you wound up with it all these years later.

[@broncobum]

I just approved the final details on my Father's headstone today, and used this video to unwind. I hope you can find peace as well.

[@roycsinclair]

Mar 27/72 is the service date. It becomes really clear at a couple points in the video when it's in the shade of your hand.

[@RIGeek.]

Are you a ham? I would enjoy to work you on the bands one day!

[@OneCupOfCoffee204]

Mr. Carlson, I have a request that might be a good idea for a future video or possibly a series of videos. I want to build a one or two-tube radio receiver. There are many schematics on the internet but either the instructions aren't clear or sourcing the parts is impossible. I wonder if you could build one that we all could follow along with while you explain the different circuits as you go. And where you obtain the parts. Not only would it be interesting but we would all walk away with something to be proud of and learn from. Thanks, Rick M.

[@xeroeffect5745]

Hope you’re gaining the strength you need to keep moving forward and sharing an encyclopedia worth of knowledge many sons and daughters could only dream about. May the memory of your dad live on into eternity. Thank you Mr Carlson ♥️

[@MrCarlsonsLab]

Thank You for your kind words!

[@KamAbbott]

Well would ya look at that! I'm a radio tech with the present day BC forestry radio service! Very cool to see the old gear being used! Of course we have long long gone VHF and employ a network of over 330 mountain top repeaters across the province.

[@Ronl53]

After reading the comments, I see where you have suffered a loss in your family. My prayers are with you and yours. For you to continue to think of us here on youtube in these difficult times says volumes about your character. We thank you for continuing to make your awesome videos and sharing your knowledge. Take care.

[@MrCarlsonsLab]

I appreciate that!

[@TheBudliner]

Wow sorry to see this, I had no idea. It didn’t dawn on me when I hadn’t see you for awhile. Hopefully 🙏 you feel better soon.

[@nyckhampson792]

Sorry to read about any loss , upset within your family Mr Carlson. I find you very interesting and informative. Bless you for your channel.

[@georgelincolnrockwell14]

I'm so glad these videos are back, I missed your voice very much Mr Carlson. Hope you are well

[@panthony1525]

Mr Carlson, you truly do have an inner spark and magic with electronics. You have a lot to offer the community, so keep going. Lots of Love and best wishes.

[@mannys9130]

His heart produces B+ and he has cloth wire instead of veins. 😺 Yes, he really does do a fantastic job explaining these things and it's evident because young guys like me can completely understand what he says despite never having owned and used a tube radio decades ago when they were cutting edge technology. I have tube radios now, but I'm still very novice at the whole thing. Tubes are amazing.

[@edhumphrey8509]

Sorry for your loss. Thank you for coming back to us. Please take care of yourself.

[@repairitdontreplaceit]

dear mr carlson , please look after yourself we all miss you and want you in good health sir . take it easy and stay safe

[@psirotta]

Can you tell me what befell Mr. Carlson that he has been absent for awhile? Nothing serious, I pray. Any thoughts on what happened to the Grand Restoration plan?

[@organiccold]

@@psirotta he lost his father and best friend last month so him and family had been through a hard time. But now he is back and we are here to support him in all he needs :)

[@kilokilos]

Welcome back.

[@rdwoodw]

Paul...take care of yourself...you've been through a lot lately....good to see you back.

[@sixtoes2313]

Mr. Carlson. May I send my Condolences to you and your family.....Rick. McMurray, Pennsylvania.

[@johnbellas490]

Hello Paul!!! That transmitter/receiver combo is quite the find!! I heard you had a loss in your family! Very sorry to hear that!!!! its always a very hard thing to go through! My prayers are with you and your family!! My deepest condolences to you all. John Bellas and 73's from KC2UVN.

[@allfields]

Nice to see this old equipment getting a refresh and a new life. It's an interesting part of BC history

[@dwagner6]

Glad to see another video. You and your family have been in my thoughts since reading about your loss. Thank you for everything you’ve offered to to us via KZbin and Patreon through the years, you deserve as much time off as you need!

[@DVINTHEHOUSEMAN]

I always enjoy your videos, they're calming, very informative and easy to understand. Thank you for sticking around KZbin for so long and helping me further understand electronics!

[@TubeRadioRepairRestoration]

Thanks mr.carlson. wish I could meet you in person as you have taught me so much thru KZbin an patreon. Thank you for being mine and everyone else's elmer

[@MrCarlsonsLab]

You are very welcome David!

[@jamesdubois4425]

We love you, Paul! Wishing you the best.

[@josephsawicki9335]

OMG I am so happy to see you again MR Carlson! I thought you left us, I was lost without you for my late night videos, I tried to watch other informative stuff like watch and clock repair But it was not close to the informative and educational shows you have given all of us who watch you, All kinds of things went through my mind on where you went I thought maybe the government drafted you to engineer electronics for them, But when I seen you posted a new show I was in fast motion planning my evening like old times again, Thanks for coming back Mr. Carlson I really missed you...

[@jrkorman]

Good words, shared by many.

[@polaraligned1]

I was wondering how you were doing. Glad to see you up and at it again. Loss of a person close to you is always a difficult time. God Bless.

[@bengrebla9637]

Welcome back Paul! My condolences to you and your family on your loss. 😔

[@qzorn4440]

these forest radios may have some interesting stories of living way out in the forest... fires, snow, bears... crazy people! ☺ thanks.

[@phillipwalker8018]

I'm sorry to hear of your loss. I hope that you have many fond memories that will help you find peace. I have always appreciated the breadth of knowledge you put into your videos. You not only explain what the circuits are doing, but you give insight and specific historical knowledge about them when appropriate. That level of information is priceless so thank you for sharing it with us. Take care.

[@1949ala]

Your reports are always great, keep them coming, stay strong

[@fichambawelby2632]

Hello again, Paul. And I hope you are a bit recovered from losing your father. R. I. P. And it is a pleasure to see you here again (thinner than before, I must say), and also in Patreon. You are the #1. Keep good care of yourself.

[@krimke881]

There's nothing, absolutely nothing like mr Carlson's lab. Welcome back🤘🤗

[@xray111xxx]

My my my. I would have fired that tech for that shoddy work. Mr. Carlson glad you are on the job. Always a pleasure to see your work.

[@davidportch8837]

another great video Paul - many thanks.. and reading comments below, may I add my condolences too...

[@ariedekker7350]

Hi OM, I missed the receiver episode so picked it up and saw it first. Seen on 9/7/22 at 9:36 PM PE1KRX

[@speedbuggy16v]

Thanks for sharing, I am proud to say that I could at least understand what you were talking about and how things worked. Thanks to you.

[@leegoodair4678]

Thank you mr Carlson, it’s always nice to see one of your videos 👍

[@DavidTipton101]

Hi Paul, good to have you back and with a nice project. I haven't seen someone do a transmitter so it will be very interesting. Cheers 🙂

[@frankowalker4662]

I took a screenshot and zoomed in, I think the tag says Mar 27/72. Can't wait for the re-build.

[@AlbertAGhazaleh]

Mr Carlson my prayers go out to you and your family. I want thank you for your electronics education that pass on to all us watching your videos.

[@kevinscollan8293]

So sorry for your loss Paul but glad to see you back doing what I love to watch and what I know you love doing. Thank you for your time and the knowledge you share.🖖💕

[@Desertwolf426]

Hi Paul, I'm from Kamloops originally. That radio was in the ministry of forests in Kamloops BC. The letters on the receive dial are frequencies for different forestry districts.

[@terrym1065]

Relieved to see you in a new video and a good one it is. I have an idea why the frequency is fixed but will wait on your research to hear the answer. Thanks for the explanations on the two sections of the unit. Interesting find and will enjoy the restoration. Take care.

[@ulrichminky9495]

My father ran a fire tower in Southeast BC Canada in the 40s. The only place that could pick up their radio signal was in Washinton USA. They would forward his messages to the proper place.

[@petesmith2234]

Used to work for a Yaesu dealer, lost count of the number of 6146B tubes I binned due to collapsed envelope. Glass melted to the point that there were holes in them with obvious loss of vacuum. Mainly from FT101’s, FF901’s & FT102’s. Loved the bit in the manual for the FL2100z linear amplifier which told you to check both tubes were working by making sure the anodes glowed equally! I miss the days of tubes, solid state kit doesn’t explode in quite the same way and there’s nothing like the smoke from an HT transformer having a meltdown. Was always good fun to discharge the HT with a screwdriver just as one of the company directors was showing a guest past my workstation too 😂

[@atedepois5018]

Good evening Mr Carlson. So and the continuation of the "Restored Radio Receiver From 1957 Receives Signals From Half Way Across The Planet!" It was left unfinished. Thanks.

[@tomharris1457]

I had a Spillsbury and Tindall portable forestry service transciever. It had 1 v tubes and solid state output, cute little rig. Donated to a museum. S& T had a long history on the coast of B.C. and if you ever find the book "Spillsbury's Coast", it's a great read about radio in the early days of the logging camps and fisheries. He had a boat that was a radio repair shop.

[@Puttertorium]

I have been anxiously awaiting your video on the R-390 restoral that you mentioned in your Grand Radio Receiver Series and noticed that you had not posted in a while. From the comments I see that you have had a loss in the family and now understand why. You have my sincerest condolences Sir and I'm very sorry for your family's loss.

[@dougtaylor7724]

Reminds me of one of the radios in the 30’s movie Everyone’s Hobby. If you haven’t seen it, look it up.

[@cstatedrums6204]

incredible voice capture sir! perfect

[@markanderson8066]

I am sorry for your loss, Paul.

[@genestatler2514]

It's so good to see a new video from you, Paul. It is very interesting. Thanks from Tennessee.

[@jgb7215]

I worked for the BC Forest Service in the early 70s. The was a communications department with headquarters in Victoria in an old house behind the Parliament Buildings. Each forest district (Kamloops was one) also communications departments that support the ranger stations within the district mostly doing VHF mobile sets. There is a pretty good chance this unit was made in the Victoria headquarters.

[@easystreetphoto2401]

welcome back, paul, it's really good to see you

[@philipburrows]

Hi Mr Carlson The date on the service tag looks to be:- May 27 / 72 Sorry to hear about your loss of your father. May he watch over you and he will always be with you in your heart, soul and in your memories.

[@dwightbrown2808]

Really a different time! Imagine a government department making their own radio gear from scratch!

[@josephcooksley3219]

Great Presentation Mister C 👏 👌 👍 🙌 💪 😀

[@harrystevens3885]

The lab is looking nice and great sound and lighting in the video, glad you are back you where missed bigtime........

[@laurigardner6227]

It was serviced Mar 27, 1972.

[@jlucasound]

You are so awesome Mr. Carlson!

[@ronrowlinson5308]

Thank you for all you do! Not only for this video, but all you have shown and taught us over our time together with your knowledge and talents. Condolences as to your loss of a family member and may peace and comfort help you thru this difficult time.

[@vjdav6872]

cool - simple boat anchor...

[@JavierCanzobre]

I love your videos, i really like how clear the sound is and how professional it is, you really take time to doit properly!

[@Breakstuff455khz]

My guess about the unusually hard life of FT-101 output tubes would be because they were a favorite for the CB'er crowd for how easy they were to convert to 11m use. Couple that with the meter that (At least on my ZD model) had positions for both cathode current and average power output, it's easy to see how one could forget whether they were looking for a dip, or a peak.

[@speedbuggy16v]

I too am glad to learn something about my 101, No transmitting for now, have to get my ticket first, but its nice to find info out there on the radio so I dont burn out the tubes on my first QSO once I am legal.

[@fyreantz2555]

Mr. Carlson! Thanks for sharing your expertise! I appreciate the time it takes to do the channel!

[@markthehunter4885]

if i only would have had an electronics teacher in high school with your knowledge and ability to explain things, I would have got an A instead of a D, thanks for all your hard work

[@MrCarlsonsLab]

Glad to help!

[@hestheMaster]

I always enjoy your walk throughs on vintage electronics Paul. Somewhat of a newbie on this kind of stuff( ham style transmitters and receivers) but you make it easy to understand. Thank you so much.

[@dwightbrown2808]

I used to have a 101EE! Them sweep tubes! 73 DE N5WRW

[@robinbrown7019]

Great bench set up .you are still the best .I worked on all that back in the day of boat anchors .80 now seen a lot in my time .

[@timflynn3218]

Thanks for the video Mr. Carlson. I hope you are doing well. Take care. You have me making things again, and learning a lot in the process! Thank you for sharing your knowledge with us.

[@leewyton7975]

You know so much it is scary!!! Very Informative!

[@wesleymatthews137]

Paul- I really like the camera angles you used in this video. It’s more organic. I like seeing different views of your workspace and it’s far more interesting than just seeing the DUT. Also, great to see more of you in the videos as well. We usually just get your hands. The content, as always, is stellar and this video is certainly no exception there. Forestry radio! Excellent.

[@NigelDixon1952]

Hi, Paul, thanks so much for this one. Please accept my sincere condolences for the loss of your Father. I'm sure he'll be always close and watching over you, so proud at what you've achieved in your life up to now. My prayers are with you. I love messing around with vintage TX/RX gear, takes me back to the 60s when there was lots of ex army gear going very, very cheap! Now, it was illegal for them to sell anything that could be connected, turned on and transmitting, so they'd just pull out a tube used in the transmit section. Then as you were leaving the store they'd hold out the tube and say "By the, way, you might need this......You can have it for £1 if you like! I wonder, do any of my fellow 60s radio nuts remember the 19 set? I also had a 31 set, which happened to transmit on the same band 1 frequency as the one and only BBC TV channel. I had no idea I was jamming every TV in my village that was tuned to the 6pm news broadcast. My mother shouted up to me "Nigel, a few people at the back door want a word with you! Happy days!

[@MrCarlsonsLab]

Thanks for sharing your story!

[@_f355]

Glad to see you back at making videos, Paul.

[@moodyga40]

looks very well home made when people took pride in building

[@heronimousbrapson863]

My uncle worked for the BC forest service back in the '40's - '60's and inherited an old Hallicrafter radio when the radios were being upgraded. He gave it to my Grandfather, then I inherited it. Hallicrafters, I believe, were built from kits.

[@jessemontano762]

Prof Carlson, one of the only content creators that i am genuinely happy to see upload another glorious video... Thank you soo much!!!

[@rjy8960]

Good to see you back, Paul. Sorry to hear you have suffered a bereavement. My thoughts are with you, you have been missed.

[@bjbeardse]

You say very simple, and I hit the bottom of the mineshaft. Electonicals are HARD!

[@MrQuicksilver405]

I would love to see Mr Carlson design, build and operate a Radio Telescope.

[@Tom-W7TMD]

Very fun to watch!

[@SN-1006]

Once again, a video that doesn't fail to amaze. Thanks a lot for the time and effort you put in, Paul. Much love from germany ✌️.

[@FelicianaDelacruz]

Great to see another video. I can't wait for you to make another amazing restoration on this.

[@geckoproductions4128]

Enjoyed the video. Looking forward to the next one.

[@dapenguin2]

So cool to see this local history on such a popular channel! Thanks mr carlson!

[@nelsonjoaquim5918]

Hi Paul. Very promising restoration coming with this pair.... can't wait for it. Cheers

[@fordmustanggtish]

Another great find paul. A great idea you have , converting it for amateur use. Otherwise it would not likely get any use. Thanks for collecting and restoring these old gems and saving them from the scrap pile or recyclers!

[@faxcapper]

I'm like a Mr. Carlson's Lab junky....I just got my "fix". :-) Great to see you back, Paul.

[@followthetrawler]

Really looking forward to this rebuild - thats a very cool set with an interesting history. Feels like the Forestry service might like that for a museum or something.

[@fredbissnette3104]

you are a fabulous Elmer what a great radio that is

[@carlubambi5541]

Good work as always !

[@frankkoslowski6917]

A 1940s Radio with BFO? Wow!

[@organiccold]

Hi Paul, happy to have you back into the videos.. great transceiver here, can't wait to see this one bing brought to live. 73s from M0IVC - CT9ABQ

[@Satchmoeddie]

AZG&F / USFS sold off some EF Johnson tube transmitter receiver/public address/ phone patch sets maybe 10 years ago. They were a lot nicer than that one, but they were not nearly as well maintained. Yeah, those poor Johnsons were really nasty. There was also an EF Johnson antenna switcher with that setup. Those had been jury rigged up with 350 watt RF relays.

[@mikejohn5573]

A BFO is a receiver function which is used for CW and can be also used for SSB decoding. It is basically an oscillator that can be adjusted from a little below to a little above the IF frequency. With CW it beats with the carrier (IF) to produce an audible tone making it easier to hear. With SSB it replaces the missing carrier, mixing with the sidebands to recover the audio.

[@grimreboot]

Thank you for the upload :)

[@g0bzy]

Hi, I can confirm the PA valves in the 101 can melt if the plate is not dipped properly. I actually have a couple of melted glass 6146Bs here. This probably applies to other radios too, like the 901 and 902. Wonderful video, thanks.

[@rsmrsm2000]

Amazing !!!!

[@GeorgeWMays]

Tres cool. Thanks a bunch for another real fun video. Cheers.

[@mikefinn2101]

It has been too long since last video,your the best of the best on you tube,looking forward to the restoration looks like a fun project. can't wait until next time

[@marvintpandroid2213]

Hello, nice to see you back.

[@Stan_o7]

Nice tan Mr Carlson👍

[@peteb2]

As always Paul, a really great look at some olde kit with added bonus it's not just another ordinary MW radio receiver or audio amplifier. This RF stuff, especially of this style is a huge mystery to me!

[@towerman75]

The sad part is having to wait for part II. Great job, and sitting in anticipation. Jim

[@mkelleyp7]

The Forestry Radio title caught my eye! I found a similar radio built for the U.S. Department of the Interior Grazing Service Oregon Type F Model 2 at a swap meet. Unfortunately I couldn’t afford to leave with it but I did get some pictures. This radio also looked like a custom build but had engraved 2 layer plastic labels. Very cool!

[@pharanchemie8645]

Thank you Mr Carlson. I like your new Lab Set up. looks really tidy , Great👍🖖

[@MrCarlsonsLab]

Thanks 👍

[@danmacdonaldbooks4774]

I can't wait to see the converting of this transceiver