#269

[@johnrees44..G4EIJ]

Hi Alan..This has to be a definitive demonstration of logical fault finding in a transceiver.. Thank you for taking the time and trouble to inform and educate the rest of us..73..John.. G4EIJ

[@sreekumarUSA]

Greetings from California. The testing and diagnostics were quite systematic and very applaudable. The running commentary, crystal clear, composed and exhibits years of experience and wisdom. Thanks. The Porsche.... a real beauty. You are the best. Take care and 73s.

[@paulcollins664]

I love the logical way you work Alan, as always a good lesson in radio repairs 73 Paul

[@TheRadioShop]

Your fault finding was excellent Alan. Process of elimination. Works every time. Great repair!

[@PeterWMeek]

Dividing the signal path in half and then dividing the half by half (and repeat) - works (almost) every time. Great demo of the method. Thanks.

[@kooox]

I lost nearly all my electronics knowledge unfortunately, but those videos are still really enjoyable. I'm doing computer programming now, and it always amazes me how debug techniques for complex systems are the exact same. Thanks Alan!

[@Thinks-First]

You have a gift for explanation and instruction. Thank you.

[@_droid]

I really like these type of videos because this is exactly the type of thing I do myself and am always interested in learning how other people troubleshoot. Thanks!

[@herbertsusmann986]

Nice clean fix, good troubleshooting, no false garden paths to follow on this one! Nice!

[@964tractorboy]

Great video. Thanks. The Yaesu documentation and construction are also a joy to behold.

[@mfgnyc7114]

Excellent work Alan, you take the time and effort to actually educate the viewers of this video. Very nice video work, that goes along with your easy to understand explanation of your troubleshooting techniques of this 1000's receive problem. I will be checking to see what other repair log gems you have created. Thank You, 73s.

[@w2aew]

Thanks - I do have several other repair videos, as well as a few that are simply "walk-throughs" of the circuits of some radios.

[@jagardina]

I suspected the relay when you found the problem was frequency independent. Glad my instincts are still good. I haven't repaired a radio in nearly 30 years...

[@marklowe7431]

You're exactly the kind of guy who should be working on peoples pride and joy. Brilliant.

[@MichaelLloyd]

I really enjoyed this video. Good methodical, troubleshooting and great video / audio quality as usual

[@CarlosAvellanet]

I wish all the repairs were that simple! Good Job!

[@danishnative9555]

Great systematic trouble-shooting process Alan. But you got off easy with the mechanical relay fix.

[@w2aew]

Sometimes you get lucky ;-)

[@MikeB_UK]

Hi. I just wanted to say a big thank you to you for your videos. As a lapsed electronic hobbyist I learn a lot at the same time as getting much enjoyment out of watching. I especially like the explanation drawings and schematics you sketch out when explaining some principle or circuit. Thanks again for providing such an educational source of information.

[@FlyingShotsman]

Nice work, Alan. Sounds like you were under the weather when you did the troubleshooting on this rig. Hope you're feeling better, and thanks for gutting it out to make us a video anyway!

[@mattweger437]

What a great debugging process! You make the best videos. I have learned so much from your channel.

[@mattweger437]

I was going to guess the capacitor. But mostly because I haven't seen a relay fail. Must have been used alot.

[@emylrmm]

Great demonstration of good troubleshooting technique. I wonder why the relay failed.

[@K1ZEK]

Thank you for taking the time to make the video and explain your method of troubleshooting. 73 Leo k1zek

[@bennockley]

An Enthralling video, Alan, Steady Hand whilst soldering!!! and Your fault finding Is Faultless. I like Your Style, You put Me in mind of "The Radio Shop" in the States, if only You Blokes were both in Australia, I have an Kenwood TS820S that Needs some TLC to put it Mildly. Thanks a Million for the video, 73s Mate

[@rollerbald]

Nice job Alan - thanks for posting this. Always fun and informative to watch your videos. 73, Bill.

[@marklowe7431]

I have this radio and exactly the same problem. Your video really helped not just in the fault but the method you narrowed it down. Huge help. Thank you.

[@marklowe7431]

Mine ended up being a few fast switching diodes on the RF board and FET J310's. I think the same relay was already replaced and the improvement mod to save the relay already done.

[@doranplatt6394]

I have two "D" models in service, today. So far they have been fin rigs. This video offers some confidence that, when failure occurs, the 1000D is truly repairable. K3HVG

[@g0fvt]

Another excellent video, I have repaired a few of these and have one of my own so was trying to jump ahead. My own one has never had a fault. I was expecting a fault around the RX attenuator... or a loose connector in the first IF, the choices narrowed as you progressed.

[@PapasDino]

Nice fix Alan...like your homebrew signal injector. I've always hated those TMP connectors and found it useful to make up a BNC to TMP dongle so it's easier to make a solid continuous connection where it needed to be maintained while I work but for a quick check your injector makes more sense. 73 - Dino KL0S

[@w2aew]

I like the idea of the dongle - I'll have to make one, once I get my hands on a spare cable with a TMP at one end!

[@pu1ypj]

Dino, MANY THANKS! I ALWAYS wanted to know the correct name for those connectors and didn't found anything on the internet about them. TKS 73

[@galileo_rs]

Me too :) Yaesu used those bloody things in a loot of their radios ...

[@PapasDino]

Felipe - the manufacturer's name is actually "Taiko Denki" but TMP is so much easier to say!

[@DrFrank-xj9bc]

Good repair done. This unit is very repair-friendly, though.

[@warplanner3258]

Had me going their, Alan. The first shot in the sequence looked like you glued the FT1000 to the wall and that it was more or less floating in space.

[@johnnyrebellion8672]

I was all jacked up on that. I thought it was a magic trick.

[@mikeharnett2410]

For a poorly-skilled bench tech such as myself, this video is a godsend.

[@chrisstorm7704]

I often try to guess what the most likely culprit is through the testing process, as well as predict what diagnostic method is going to be used to verify a component. I have to admit, I was way off on this video. I fully expected to see some meter checks to look for problems with the cap, tvs diode, or relay, but one little jumper wire later, the radio was diagnosed. Good stuff

[@vonzigle]

Nice troubleshooting job--thanks for posting! 👍🏽

[@vk6op648]

Really enjoyed the repair. Much appreciated.

[@Dr88man]

Wow, an inspired approach and method to a daunting task. I have a mint FT-1000D where the S-meter reads S1 without signal. Can a S-zero S-meter calibration be done without a signal generator and oscilloscope? According to the service manual, the sub-RX S-meter calibration is in the RX-2 Unit, and the Main-RX S-meter calibration is in the IF Unit.

[@TheRangerDale]

Very Good Alan and very clear understanding Process of elimination..Yes I like the little Gagits pop up in the test , Yea have to make one of those Hummm dingers lol lol As always enjoy watch the video's Alan 73's

[@786jinga]

Just woke up from my bed (it's morning here in india). Your video made my day. Awesome video !!

[@boxingday11]

Thanks for putting this video together, really enjoyed your efforts. Regards Carl. G0lka.

[@tomy983]

Good job! What a radio!

[@gliderpilot8882]

Good job on the debug and repair ! Loves the video's. BIG Thumbs up!

[@Luzt.]

All good things were already said in earlier comments so I can only thank you.

[@baghdadiabdellatif1581]

Thank you alan for the priceless explanations. In this days i am trying to anderstand the intermittent atunuation that happens in ILS detector its baseband 90hz & 150hz with no s miter.

[@metclapton]

Ahh good video, Always good to see the fault finding process , I have low RX in one of the UHF bands on my Icom IC R9000 but is hard for me to find fault i will have to inject some signals after the filters good idea thanks for vids

[@BenSmithHuugs]

Your videos are always a treat, thank you!

[@jbatlanta]

This process is SO great to watch along with your explanations and "logic". Wish I could do that! Inspired to attempt getting my old Heathkit SB-104 working again! TNX de N0HRM

[@w2aew]

Glad you enjoyed it. So much of troubleshooting is understanding the basic signal flow, and what to expect to see at various stages.

[@g1fsh]

Really nice job Alan very well explained great video.

[@kevinobrien8803]

Really great video. With the first section (before mixer section) having no active components, what was reason for the inline capacitor on your probe. I think you said was to protect your sig gen. What would happen without that cap in situ? Is it because the DC voltage could generate a current into your sig gen via probe? Is this good practice when feeding signals into anything.

[@alanwolke6253]

Some signal gens don’t like DC being applied to their output. Since the switching diodes work with a DC bias, it is likely there is DC present. Using a series cap is just good practice.

[@kevinobrien8803]

Thanks, I thought that would be the case. I suppose as long as cap is a small value and can cope with the tiny bias voltage then any cheap cap would do. What would be the sort of values you would use for this? Please do more of these walk through videos they are so fascinating to watch. Like a detective story.

[@adnanmalik7364]

wow mate excellent video!!! one question though, how would u differenciate between sensitivity and squelch in terms of detecting audio? what i know it seems same but they are different.

[@alanwolke6253]

Squelch level is user adjustable, while sensitivity is based on the design.

[@sanjayd411]

Outstanding work! Very systematic and logical troubleshooting...many thanks for sharing the video...73 ..de KG9FA.

[@steveaulick5863]

Awesome, I have a FT 1000 that I'm having basically the same problem and this really helped me with my repair. Thanks, Steve, n0vcu.

[@dennisqwertyuiop]

great repair

[@clems6989]

Actually surprised yaesu used all of those EM relay's in the TX/RX circuits...Great Repair..

[@Traildraft]

Like a pro! I was able to follow along very nicely.

[@bigfoottoo2841]

Alan, did you check the energy absorber? Either a surge from the antenna port or energy from the transmitter cooked the relay.

[@robertcalkjr.8325]

Nice work. Thanks, Alan.

[@kevingray707]

Another fantastic video!

[@straightpride451]

I'm so proud of you lil dude. 😎

[@matthennagersguitarlessons]

Man, that was awesome!

[@chuckgoede4778]

what brand or model of vacuum desoldering tool is that or how much does an equivalent unit cost, capable of doing this type of operation? What is the proper wattage setting? Any suggestions? thanks, Chuck

[@AboubakrA]

Good repair and good video, as usual. quick question though, what does "s9" power mean ?

[@w2aew]

S9 is a relative power reading. Most common definition is S9 = -73dBm (50uV). More info here: en.wikipedia.org/wiki/S_meter

[@AboubakrA]

Thank you

[@bejsfan]

Great video. Thank you.

[@TRXLab]

It is never the same problem lol. Nice finding and great video Alan! BTW never ever found this relay faulty. 73 Peter

[@w2aew]

Interesting. I saw some reports that this same relay part number shows up as a problem in the FT-1000MP. Not sure how this relay is used there.

[@noormuhammadmalik2482]

Great video, great explanations! Thank you for this amazing content :)

[@JackSoffalot]

Outstanding! I really enjoy these videos. Thanks de N2ZD!

[@bigfoottoo2841]

Good job

[@peterbatka1869]

Thank you very much for this video ... thanks I fixed you YAESU FT 1000MP! I wish you good health :)

[@josemiguez2375]

Hi Alan,i have the same problem with an icom ic-m710 but i haven't signal injecting directly at the first mixer.if i injecting a -73dbm signal with my signal generator set in the first IF frecuency after the mixer,the signal in the smeter is s9 too? or in the other words,the first mixer haven't amplification the in signal?thank you,great video as always

[@w2aew]

It depends on the mixer. Some mixers have gain, some have loss. Most have a little loss. In either case, you should generally be safe applying -73dBm, but be sure to include a series cap to block DC.

[@worldradio456uk5]

Hi there. New subscriber here. Excellent video as all your others are! I have to ask was that a metcal soldering iron you used ? Just curious as I have one .and think there excellent. 73s.

[@w2aew]

It is an old Metcal MX-500P-11. Fantastic iron!

[@worldradio456uk5]

Thank you for answering. there a great iron. The tips last forever. 73s. Many thanks

[@MM0IMC]

Nice logical repair job!

[@mikep95133]

Hi Alan. What model solder removing tool did you use ? I solder with Metcal as well, but my Metcal desoldering station has never been as effective as what you are using. Thanks !

[@w2aew]

It is a Hakko model 808.

[@mikep95133]

@@w2aew Thank you !!

[@ElmerFuddGun]

16:50 - Factory bodge? Curious if the schematic has those parts.

[@w2aew]

There were many post-manufacture service bulletins - I wouldn't be surprised if this is from one of them.

[@MichelPASTOR]

Very interesting. Was the relay coil open ?

[@w2aew]

Haven't done a post-mortem on the relay yet, so I don't know.

[@mikaelkarlsson9945]

Hi, and thank you for all the great and informative videos you publish.. I have a question, maybe you have time to help me. I'm about to troubleshoot a receiver which have gone dead. I have a good signal generator to use for the task. But how to best inject signal in the receiver path? Can I just use a regular RG cable with a 50 ohm termination close to the injection tip?

[@w2aew]

I would also add a series capacitor so that you don't disturb the DC operating point of the circuit you're testing.

[@hawkeyes123]

really enjoyed this video :)

[@drewsmith6066]

Cool fix chap well dune nice work.

[@clems6989]

SWEET RIG !! I really love the 1000....

[@maro8D]

Hi Alan I understand that injecting the 7.199 MHz in 7.2 MHz tuned receiver will result a 1 kHz tone only for AM modulation right?

[@alanwolke6253]

No, the tone results when product detection is used for demodulation, such as LSB (lower sideband) in this case. Most receivers do not use a product detector for AM.

[@maro8D]

Ok I see. Just for experiment I tried it with a FM radio (baofeng uv-5r) tuned to 89 MHz broadcast and signal generator set to 89.999 MHz but I don't get anything. Well the static is OFF when I switch ON the signal generator but I don't hear the 1 kHz. What is pretty obvious because I feed only the carrier and not the modulating 1 kHz wave. But when I switched the signal generator to FM with 1 kHz and 10 kHz deviation I can hear the 1 kHz tune. I noticed that when I expand the deviation span the signal gets louder and when I decrease the deviation it gets quieter. Seems like this stuff is like kindergarten to every ham radio Hobbyist but I have my fun experimenting with it! :-)

[@w2aew]

Won't work with FM either, since it doesn't use a product detector.

[@w2aew]

Sounds like you're getting the hang of it - good stuff.

[@joecolee466]

I have an issue with a ft-1000, the main Rx and tx are off frequency by quite a bit(over 1 MHz) but the sub Rx is fine, not sub tx. Any ideas of which board could be the problem? Tcxo seems on frequency. Thanks

[@paulgerhardt6142]

Nice video Thanks Have an old ft-1000 and a MKV

[@Nerrvih]

Great video!

[@adamaj74]

Where did you get your electronics education, if you don't mind me asking? I'm interested in this line of work but I'm not sure about where to get good training. Thanks.

[@w2aew]

I got my BSEE degree in 1985 at NJIT (www.njit.edu). However, I got my start in troubleshooting & repair before that, when I worked in a TV repair shop. Troubleshooting and repair skills and techniques generally aren't taught in school however, they are most often picked up over years of experience.

[@adamaj74]

Thanks. I'm familiar with troubleshooting as I'm an industrial electrician and spend most of my time on breakdowns and automating older machinery. I don't have a lot of electronics training. I was looking at Devry, but after the ITT Tech fiasco I'm scared to go that route.

[@gilleardbrosltdvideo9295]

Superb detailed video thanks. My old FT1000 lost receive between 2 mhz and 4 mhz as well as output power Any suggestions very welcome.

[@vitorcezar5443]

EXCELENTE VÍDEO... VOCÊ É UM BOM PROFISSIONAL!!!

[@aerialheights5680]

10-12 years ago I read somewhere that Yaesu installed a transistor in reverse in the FT-1000/D, causing something like a 10-12dB loss in sensitivity, but I've searched and searched and cannot find anything about it. Have you any knowledge of this issue?

[@w2aew]

I am not familiar with that issue.

[@Swataia]

That is probably the Kenwood TS-940S case. And I'm not sure if that really did as much loss in dB, there is a lot of writing on that on both opinion...

[@silverdr]

Any chance you'd like to have a look at my FT-857D?

[@davequick3373]

Nice job!

[@wa6gxq]

Great Video! 73

[@jjoeygold]

Relay teardown?

[@yanwo2359]

I too am interested in why the relay failed.

[@loughkb]

Nicely done, and I'm envious of your test gear! Kevin here, from The Old Tech Guy channel. 9 thumbs down on this vid and I can't see a reason why. That always perplexes me. There's 9 miserable souls out there! (ha). Did you take the old relay apart for a post mortem examination? I'm often curious about the failed part. Took a ceramic filter apart once and discovered that even though it was sealed, the interior had rusted metal parts. Probably moisture at the factory during the components assembly.

[@w2aew]

I did pull the old relay from its housing, but didn't pull the reed cartridge from the coil - so never did a full post-mortem. It's tough to see problems inside a reed relay envelope.

[@DaveMcAnulty]

Where did you get that nice thin coax?

[@alanwolke6253]

It’s RG/174

[@patrickbouldinkm5l143]

@@alanwolke6253 Alan, just double checking, any reason why I can't use a DC block connected to my Signal generator, and then connect a standard O-scope probe to that? (at X1)?

[@w2aew]

@@patrickbouldinkm5l143 Yes, that would work.

[@unklebidii]

That's incredible. I know nothing about RF. But I want to learn about it. It's some very interesting stuff. Any advice, tips, etc?. I have little projects or circuits really that keep me busy but I'm always looking for new ideas that help my knowledge base.

[@alanwolke6253]

Get a hold of the ARRL Handbook, good place to start.

[@Radiowild]

I like how you isolated the radio to find the root cause. Job well done! BTW.... Why is it when I order repair parts it takes me significantly longer than you? lol 73's Bob

[@alanwolke6253]

It only took a week :-)

[@cristhianborrego7805]

Buenas tardes tengo un yaesu ft1000d tiene señal tx y ex pero no tiene audio en la bocina interna ya la probe y esta en perfecto estado ,le conecto los audífonos y en perfecto estado se escucha el audio en los audífonos

[@w2aew]

It is possible that the external-speaker jack is dirty. When you do not have an external speaker plugged in, the jack makes a connection to the speaker. This connection is removed when a speaker is plugged in. It is possible that this connection is dirty, and inserting/removing a plug in the ext-speaker jack a few times might clean it.

[@cristhianborrego7805]

gracias por atender mi pregunta revisare el jack si tiene suciedad aunque cabe mencionar que ya lo habia probado con una bocina externa , lo limpiare saludos 73s

[@Alessioalessio-qv1ff]

Wich is better the 990 or the 1000?

[@w2aew]

I don’t have direct experience with the 990 so I really can’t compare.

[@donaldshields2483]

Very good job k1emw

[@1903A3shooter]

Much fun, thanks, Dave W4GSM

[@hg5icon]

Thanks, Great video!

[@kamalhidayat3787]

nice trace troubleshoot

[@peterfong2241]

Top of the day to you bro, can I send you a radio to repair ?? Am trying to buy a ham radio tru a friend in Georgia, but wen he get it, I would love someone to go tru it 100% before I get it in Jamaica west Indies, recap, align, peak an tuned etc, etc can you let me know, please an thanks !!

[@yasindu]

awesome

[@wdtech_9]

nice tutorial....tankyou...