I'd almost forgotten how much fun it was doing this PS replacement to my 940 a couple of years ago...their S-meter and LCD backlight replacements are great as well. Amazing how much lighter the rig is afterwards (although it's still pretty heavy!). Rig should be good for another 40 years now! 73 - Dino KLØS

I had a 940 and it had p.s. issues. Good job.

Another great job I just enjoy so very much watching you do you have so much talent and you do such very nice work I just love watching you so keep up the good work and I will keep watching god bless

I had no idea there were PSU replacements for the 940. What a great save for a fine radio.

Nice replacement job Buddy. Looking forward to the Patreon video.

Thanks Buddy for another great video repair. I have a TS-940s and it needs this power supply upgrade. Now I know how to do the job the right way. Please keep the videos coming. de VE5EE

No more transformers, yes plural. No more long wires running transistors to a heat sink, yes there are 4 all together if I recall, 2 for low voltage regulation and 2 honkers TO 202 package I think. No more huge capacitors under the AVR board. Was even able to remove said heat sink. I own one. I rebuilt the unit in it. Good video. I have a stingy receive on mine as well, I gotta Patreon to see said video?

The ''never used'' wires are used if the optional CAT control board is installed into the radio.

Thanks Buddy, didn't know about this mod.👍🏻🇬🇧

Nice job and great detail for some one else to follow along and do your self. Really appreciate this video

Dave Kersey Thank you for all the info. Was very help full, just completed my 940 with this kit and works great.. had a problem with my PA fan and did what you suggested and worked fine. Thought your vid was better then the one Jeff did on line. KEEP the video's coming I sure learn a lot from them . Dave PS I am 84 and still working on my own equiptment. !!!

Great job , enjoyed how keeped color coded and bolted dow. Volunteering and doing shipping for vrcmct museum. We sell a lot of used ham equipment. We have to make sure everything is secure inside before padding and boxing it twice. Adds a little more to weight but saves getting to beat up by the big companies. Your the best can't wait till the next one.

Great job as always Buddy. Thanks for sharing.

Wow, nice job Buddy. Looking forward to the rest of the repairs on this one. Thanks for sharing it with us. 73 de K7RMJ Frank

Had one a few years ago. Nice rig but a bear to work on. Even battery changing was a big deal. Wish new rigs would have the build quality though. Thanks Buddy.

Another great video! We love you Buddy!!

Nice professional job Buddy. Well done. 73 Joe

Looks like a fun project. Keep up the good work.

Nice clean install, Buddy. Solid, quality work as always. I always admire the solid, metal construction of these "older" pieces of equipment. Thanks for sharing!

Great video , I love watching you work,

Kudos for your consistent quality work and attention to detail! Those look like a really nice PS replacement. Personally I prefer the original linear supply. Not surprisingly, some have reported noise in their TS-940s after installing a switch mode PS replacement. Time will tell but switch mode power supplies are not as reliable as as linear power supplies. For me a better way is to recap the original supply and install a high quality 12V PCM fan to replace the fans in the rear. The 12V fan can be thermally controlled by an inexpensive (adjustable) PC fan board and the 28V supply regulated down to the required 12V using a common 12V voltage regulator device in a simple circuit. During operation when needed, the airflow of the new fan based on temp and on demand would be able to supply many times the airflow of the factory configuration keeping the factory PS cool and the rest of the unit cool as well.

Great tutorials! Thank you. 👍🏻👍🏻

Very neat and a great job Buddy.

Great Job buddy !. Happy 4th of July.

nice repair

Very nice vid..... Thanks

r Enjoyed the video. Was funny that you kept referring to the SMRPWRS as a transflormer. HeHe

Good job. but I guess I am just too old-school. I would a lot more prefer the old iron transformer supply than a switching power supply.

Nice slick install and your "added" installation changes makes for a better job in my opinion, so well done! But sadly the problem I see is that the cost of such a repair is pretty cost prohibitive based on current resale value of these radios. Maybe someone will come up with an AVR "replacement" board to use the existing transformer along with fan upgrade. Thanks Buddy for the video!

I wouldn't put a switching power supply with all it's RFI inside an HF transceiver. I think you will pick up QRM at regular spacings on the dial.

Guessing it went from an analog power supply to a switcher. They can get away with smaller capacitors and don't have the pass transistor power dissipation which likely caused a lot of the heat. You had me worried when you were disconnecting all of those wires/cables but the AVR markings made it easy to reconnect. Looks like you've done one of these before. I'd be a lot slower on a first time because I'd be afraid I'd mess something up.

This is the second thumbs up, Buddy 👍

you are always helpful and I learned a lot from you. wish there where more ppl like you out there. out of all the 80's and 90's rigs kenwood icom yaesu etc which models are exceptionally well made and stand out over the crowd? the ts930 ts830 ts940 or icom 965 ft 901 etc in your opinion?

Very nice job Buddy. Always better to make a neat installation instead of wires just running willy-nilly. LOL

Nice work 👍

They refer to old vacuum tube rigs as boat anchors. I have one of these TS-940's and it weighs a TON with its original power supply! I wonder how many pounds you pulled out? Nice clean install of the new supply.

Hey Buddy, Bloody Good Vid, Mate😁😁, When I watched it a Month or so ago, I thought Bugger!!! doing a recap😆, This Vid made Me forget BAD eyesight and SHAKY Hands, so I Splurged and am presently awaiting My P/S from Jeff, I Watched His Vid as well, Glad I saw Your's and Jeff's vids First & Not Last, there's a FEW Scary ones out there, God Bless, Mate. Des☺☺☺.73s De VK2EAC, just in final phase of removing old ps and doing as You have done, Buddy, that double grey cable goes on Mine to battery box under speaker hooks on to a small board in there I don'know what it does, do You??, Thanks Mate

Does the new switched mode power supply cause any RFI for signals close the receiver noise threshold?

Thank`s for intresting Video - Ulrich DF5LM

Great Video as always. Got a question not pertaining to this video but the newer rigs. I have a Yaesu Ft-450D that I would like to align but all the alignment tools I have are too big. My question...... Is there a new set of tools for aligning modern radios or do I have to whittle new ones. The tuning cans are so small and I cannot find a place to buy the tools that are needed to do it. Wasn't sure if I missed something but again no site I can find sells those alignment tools. Thanks Buddy for all you do to help everyone and love every video. 73 ad0am

great video, i have one of these. could i bring it to you next july to get it updated and new caps or whatever it takes?

The purists must be spluttering - a switch-mode power supply INSIDE the rig? From your observations does it add any noise in the receiver or does it work just fine?

Putting a Switching Supply in an HF xcvr does it cause any internal RF interference? Or output signal purity?

I have a Kenwood Ts-940s and I'm pulling my hair out trying to fix it. I was hoping someone had seen this problem, a google search turns up nothing. Recieve is fine but it doesn't transmit. I mean it doesn't even switch over. With PTT Still receives and does nothing, no TX indicator. All supply voltages looks good. Pressing the send Button does the same thing. Any info would be appreciated!

Is the replacement power supply a switching ps and not a transformer?

Whats that with your arms????

Why You did it? What is wrong with this Unit? This should have just output 24V.

Wery professional work! 73 de 4Z5JJ.