Kenwood TS-930S power supply and cooling fan mod

A video showing how to keep your TS-930S cool and extend the life of your radio's power supply

[@riottaba]

Good mod. Next lift the 28 volt leads (orange and yellow) off the power switch and join them. This keeps the 28 v relay energised until the 28 v supply drains down after switch off. Hence no over voltage after switch off job done!

[@riottaba]

I should have said This keeps the 28 v relay energised and the 28 V supply under load until it drains down after switch off hence no risk of over voltage.

[@timpoliniak7361]

The fans I used for this mod are JMC 7322270-7 (12v) for the power supply and GDSTIME DA7015 (12v) for the finals. By spec they moved the most amount of air while having a low noise level in a 70mm fan, but you can basically use any 12V 70mm fan doing it this way. As shown I wired them in series. You can certainly use 24V fans wired in parallel as well....since I mistakenly ordered 12V fans, I used them.

[@kf7gc]

Where can I get the 24v 70mm fans. I have to replace the power supply fan not working. Tomy KF7GC

[@timpoliniak7361]

@@kf7gc I got them from Amazon

[@DevinRostron]

Ahh I was just about to make a video about how I did my fans. Got mine all smashed up from eBay shipping and had to get creative with some computer fans

[@jwnagy]

Its been two years. Still running? Jeff W3AAB

[@timpoliniak7361]

Actually no. I lent it to a fellow ham and, long story short, he blew the stupid thing up. It was a 100 VAC Japan spec transceiver and instead of plugging it into the step-down transformer he plugged it into the wall. Gave it back to me not saying a word and after a heated discussion I no longer speak to him. Fast forward to now. I have a "new" TS-930, and was able to accomplish the mod much easier by using a bucking circuit which is thin enough to fit under the case, eliminating the need for a dropping resistor: www.amazon.com/gp/product/B07PDGG84B/ref=ppx_yo_dt_b_asin_title_o05_s00?ie=UTF8&psc=1