How to replace Collins KWM2 filter capacitors Fix hum audio motor boating

Part 2 of the Collins KWM2 repair. This radio has lots of neat problems. Great material for KZbin videos and my learning process. These radios are very desirable amongst collectors. I have never operated these transceivers, but look forward to trying this one out when completed. Many issues to resolve. One step at a time. Soon it will be rocking the airwaves. Part 3 will cover the intermittent issues, plus hopefully find the reason for low negative bias. My plan is to add capability to the shop for these radios, as the need is increasing while repair shops are decreasing. Stick with me thru this process. If you have info to add, please pipe in. Also, if you need a drop in replacement filter cap for your Collins or other rig, see KE9PQ's web site. Great guy, quality products. TD

[@AurorasPop]

A joy to watch you at work!

[@genes8929]

This was very helpful Terry. Thanks and Cheers! N4FZ

[@johnstitt2615]

The innards of that device.......a magical labyrinth.

[@johnsimms3957]

Looking forward to part three.

[@robertcalkjr.8325]

Nice radio! Thanks Terry.

[@johnbellas490]

Hello Terry !! I Wish you and your family a VERY MERRY CHRISTMAS and a HAPPY NEW YEAR, Thanks for the all the videos, Especially interested in this Collins series!! Have a good day! 73's John Bellas KC2UVN

[@d-labelectronics]

Hello John, We wish you and your family the same. Thanks for being a subscriber, and look forward to showing more worthwhile videos in the coming year.

[@moodyga40]

work of art

[@DeadKoby]

How do you fix a big mess??? One piece at a time. Thanks for sharing!

[@tomk1tl]

Sure would be nice if you could take "early retirement" and go into business repairing guitar amps and Collins equipment...like you said, "good techs" and amateur radio servicing places are getting scarce....you 'da man !............and you have a great helper with Emi ;-))

[@RobertKohut]

Nice!!

[@olegguselnikov5293]

Hello from Russia (Siberia).

[@marleythechameleonandherbi2724]

No issues with my round emblem, but that multi cap is the only one I didn’t replace. You make it look easy. KJ4KAF

[@genes8929]

I just replaced C106 and you have to be patient and be careful to solder back all the wires & resistors. I had to replace a wire that was coming from a tube pin connector. It was a #22 wire with a Teflon jacket. Replaced all the electrolytic caps as well. This is in a 1962 KWM-2.

[@edlundgren527]

Hi Terry. Thanks for providing the best most informative videos on KZbin. My question of the day: I picked up a 1940’s or early 50’s Precision signal generator from a junk shop to possibly be used for alignment of old radios. I never tried using it and I don’t play with radios anymore and was wondering if it still has any practical uses or is it better left as work shop decoration. It does turn on and pilot light works. I think there may be some useable tube amp parts in trapped inside. What would you do with it ? Thanks. Ed Lundgren Merry Christmas!

[@msaradio7455]

Excellent Terry! Do I need to send wine? Didn't see any, Hihi! 73

[@d-labelectronics]

Yep, to early in the day. Will have some flowing tonight!

[@Cristian-gu1st]

now that's a crowded space

[@UDX-21]

WOA, what a nest--LOL

[@mykenwood830]

I got a White's XLT metal detector !

[@douro20]

Perhaps someday I will have a Collins receiver. A transceiver would be out of the question since I'm not an OM and I just don't have the discipline to be one... Any idea what kind of can that is which he used to make that multi-section cap?

[@georgeb6195]

How do I replace the metal band on the exciter tuning shaft. Mine is broken

[@dhpbear2]

Is the mechanical connection on the ground tab on the can cap, the only path to ground or is there a ground wire soldered to it?

[@genes8929]

My KWM-2 from 1962 has a #21 AWG bare wire soldered to the can post from a ground lug secured with a 6-32 bolt thru the chassis bottom.

[@kd5ozy]

be sure and use the tuning instructions when loading it up. follow them exact.

[@d-labelectronics]

Roger that Sir, I believe I have found the negative bias issue. Still need to find the intermittent connection in the filament circuit. Then I will attempt setting the idle bias on the finals. A time consuming process, but educational!

[@dhpbear2]

@@d-labelectronics I'm wondering how Textronix dealt with grounding and aluminum chassis. Might be worthwhile to peer into an old 400 or 500 series 'scope!

[@dhpbear2]

I remember horror stories involving trailers burning down because they used aluminum wiring. It would react with the steel in the outlets, cause a voltage drop and fire!

[@johnstitt2615]

Ok. I know electrical but the innards are......jezus.

[@TheyreStillOutThere]

I can’t see how something like that would’ve been cost effective to manufacture, even back in the day. Whoever was wiring and soldering that thing should’ve been making at least a brain surgeon’s salary.

[@AmishSpecialForces]

They were probably making $1.25/hr, which today would be like $10/hr