Ham Radio: Electronics Troubleshooting and Repair Tips and Tricks

In this video I take a detailed look at the method I used to troubleshoot and repair a bad attenuator on my Kenwood TS-440 Ham Radio.
Service manual:
www.radiomanual.info/schemi/KE...
My Amazon Store:
www.amazon.com/shop/sevenfort...
My Wife's Art:
laurelwoodstudio.com/
/ @mindyzielfelderart
My Merch:
www.grapevineamateurradio.com...
The KZbinrs Ham Radio Bunch:
youtubershamfest.com/
#hamradio #ythf21 #repair

[@guyattheend3144]

You should definitely consider doing more repair work in your videos , you make by far the best electronics repair videos for the intermediate person looking to further their learning in electronics, better than Shango066, Mr Carlson's lab or other electronics channels that I found, you actually take the time to explain what you're doing why you're doing it, so people that are want to learn can understand it. Great job 👍

[@SevenFortyOne]

Thanks very much for the kind words! I'm glad you enjoyed my video and humbled to think you'd consider my video on par with some of the best repair techs on You Tube. I really wish I was as smart as those guys but I do my best to learn from their example

[@kevinmccool3719]

Someone obviously has been in that 440 before attempting to fix the attenuation circuit based on the scratching all around where w2 jumper was. Why on earth they installed a resistor there is questionable. But that was a resistor they installed, that was not an inductor. Good video and well explained troubleshooting tips. I use to repair all the older Kenwood hf radios in the 90's. Worked on the ts-510,520,530,120,130,430,440,450,820,830,930,940, 90's model's Yaesu, older Icom gear. Had full test bench. Eyes are old now and stopped doing it but I really enjoyed working on them all. Keep up the videos, it really brings back memories of my repair days.

[@JnJTrueOutdoorAdventures]

Great fix!! My Kenwood 440S had the dot issue and so far I have been able to fix all but two bands. I had to order a component from China, which I finally got, but I have not opened it back up to put the component in the circuit. Someone else had removed all the old glue out of it, but the components had already been damaged by it. It works great with all the bands I have been able to bring back. Videos like this is so nice to find to help repair these great radios. Thanks for sharing. Juddie - WD8WV

[@sm6ehy816]

Repair help by means of a circuit tester. The Huntron 1000 or equivalent is just super. It can measure circuitry even without desoldering. Also use microscope visual inspection to see if something is burned. Use a 10:1 oscilloscope probe connected to your spectrum analyser and measure the signal path. Search the net for common faults of the DUT. GL 73 de Bjoern.

[@racrx7]

Excellent and thorough video!! Well done 👍

[@sarto7bellys]

Thanks for showing this Rob, you've got me thinking...........atb from England

[@scottjohnston804]

Great video, easy to follow and I learned a bunch, now to dust off my old TS 130

[@Stop-driver]

Thanks for the detailed information👍

[@scgoralski]

Great video, thanks!

[@mrppassman]

Excellent informative video. Great tips for working in tight spaces. Thanks & 73's. Paul, WB0BBC

[@TheNoCodeTech]

Man, your depth of knowledge is amazing! #TeamReplay for the win! #YTHF21

[@SevenFortyOne]

Thank you for the kind words!

[@cwebs1000]

great info, more more more!

[@melbytvenge]

Great Job

[@williambrinkmann5564]

I like the way you explain things, I recently purchased a Ts 440 to fix up it's not working at present, but I have some things that need taken care of first cleaning the gule stuff off the RF board, I am also going to install a AT unit that will be here soon. Marry Christmas

[@SevenFortyOne]

I'm glad you enjoyed my video, thanks for letting me know! Good luck with your project!

[@Siskiyous6]

Great content!

[@SevenFortyOne]

Thanks! Glad you enjoyed!

[@jessegiammarino9831]

Thanks!

[@BillyLapTop]

That was real fun. Nice fix.

[@SevenFortyOne]

Glad you liked it!

[@1crazynordlander]

Thanks Rob! You are so smart!

[@SevenFortyOne]

Thanks Kevin! I'm more persistent than smart....

[@Dallas-Rife-UDX-347-Tennessee]

Very nice video . Great job

[@SevenFortyOne]

Thanks Dallas!

[@just_in_time5518]

Nice fix Rob! :)

[@stephen1711]

I enjoyed it too!

[@1958johndeere620]

My technical ability starts and stops at the power cord. I did, how ever, just put a new control board in my Astron 35M. Mine was about a year old and started having crow bar fits. I took it off line and put it in the basement for 4 years. Finally did some research, and was able to get the entire board from astron for 29 bucks. Have done some variable load testing with lights, and flashing lights to mimic SSB voice peaks. Its run an hour or so under those test conditions and the voltage is within .02 volts of stable. Have not dared to put it on the radios yet, but I think I have tested it enough.

[@DK5ONV]

We break it - you fix it . . .👍👍👍

[@donalddunn9520]

Can you teach me how to adjust vr1 and vr2 on the final board on a ts-440

[@davidwebb3995]

have a old Kenwood TR-7930 would like to increase high power have no service manual what VR do i need to adjust

[@joerowland7350]

Nice video i have ts140s n i love it n use it all the time got ft1000d whet wus new n i dont have 10 hours i bet because i live 140 so much 73 n good dx n9prf

[@hakannsphn]

Hi Sony fh b 170 is not capturing stereo channels can you help please🙏

[@timothykulawczyk5824]

I get no audio on USB & LSB but good audio on FM mode??? Could you help to trace out the audio!!! You explain the troubleshooting very well!!! If you could help!!!

[@SevenFortyOne]

Very little info to go on without the radio in front of me....sorry I can't really help..unless your squelch I'd just turned up....

[@timothykulawczyk5824]

@@SevenFortyOne Sorry I did not give enough info!! The no audio is for my Kenwood TS440s ham radio!!! Even though on FM mode I have great volume!!! You are very good at What you do, easy to understand!! Will continue to watch your videos!! Thanks!!!!

[@Flyboy737]

Nice video Rob. I have owned a TS-440SAT since 1989. I lost my service manual in a move. I could not find the link for the manual you mention in your comment section. Could you please list it?

[@SevenFortyOne]

Try this one: www.radiomanual.info/schemi/KENW_HF/TS-440S_serv.pdf

[@Flyboy737]

@@SevenFortyOne Rob, Thanks, much appreciated for the link. NY5AR

[@tbronson158]

Hi, I just bought a ts-440 S and tryed using a cw bencher dual paddle with it but only get a solid tone on the left side . Do i need to tell the unit Im using a dual paddle key? thanks tee in idaho

[@SevenFortyOne]

I don't know as I've never hooked up a key like that. I suggest trying to find a manual online

[@1southsoon]

Nice job Rob.... Chris. KC1KWX

[@SevenFortyOne]

Thanks Chris!

[@bigbubba44691]

That is not a choke , it is or was a 4.7 ohm resistor

[@SevenFortyOne]

I suppose it could be a resistor but not sure why it would be needed. My assumption was an EMI choke but I could be wrong

[@bussi7859]

You can’t fix it this is a scam

[@SevenFortyOne]

I can't? It is?