#94 Parts received and a few Tips on the Collins KWM 2

We finally receive some much needed parts for future video repairs. Then we take a look at the KWM-2 and find why no filament on final tube.
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[@kd4afw912]

First comment. I really enjoy your videos. Ive been watching for 2 or 3 years now. I felt bad for not giving you a pat on the back before now. Paul Carlson,Alan, TRX, MikesRadioRepair,, are also on my watchlist. All you guys are great teachers. Thank you Buddy!!

[@jaybats7865]

I get such a kick out watching you go through these rigs and bring them back. Thanks buddy

[@stormchsr101]

an old fella brought me one of those old nationals to revamp. i changed all the power supply caps with new ones and i was letting it warm up. rig worked ok but when i stepped away from it, pow! if i would have been looking close at it, my face would have gotten a full force electrolytic unwind. as it was, it caught my hair on fire and burned my rug. sounded like a 22 pistol going off. let them warm up but point the caps away from you and wear some kind of protection when messing with power supplies!!

[@PapasDino]

I had a 3-500Z socket pin in my Drake L-4B go loose on me once; luckily they are super easy to replace and I had a couple of spare sockets to use as "parts mules". Thought I was going to have to replace the socket but luckily the spring clamp took about 30 seconds to pop out and replace and that bulb lit right back up. The loose clamp created a high resistance/high heat situation and the solder in the tube pin actually started to migrate down out from the pin. A little careful heating and addition of a little silver solder fixed that right up...lucky me!!! TNX for sharing Buddy. 73 - Dino KL0S

[@TRXLab]

Great job Buddy! Like the old Collins.

[@ElPasoTubeAmps]

Nice work. I have the KWM-2A, 51S-1 and a number of other S-Line pieces and love and use all of them. Out of 35 years using the 32S-1 and 75S-3, I have had only two issues with the transmitter, none with the receiver. A few years ago a capacitor went bad (shorted) on the screen of one of the 6U8's. I don't remember which one and recently the 2.1 KHz mechanical filter opened up on one side in the transmitter. It should read about 50 ohms DC resistance, both sides of the mechanical filter. Fortunately, I found a true NOS on Ebay. Thanks for posting and keeping this magnificent equipment running. 73 WA4QGA

[@dennisqwertyuiop]

Great work, I think you cant find any better than Collins

[@joepolen7212]

Hi! Your voice is sounding better and better, you are getting over your pneumonia! Thanks for looking at the Collins, I like these S line ones quite a lot. I have a few of these, I like working on them a lot! I also have a National HRO 500 that I have recapped and repaired quite extensively, It is quite a radio and I like it quite a lot. I really enjoy hearing your commentary, techniques and approach to repairing radios on your channel so if you ever get a HRO 500 in your shop I would be very happy to hear and see your approach to aligning it and any repairs you make. I have just followed the manufactures procedure but I found online a ham that carefully describes an alignment method that uses his spectrum analyzer. I also liked your repair of your HP frequency generator with the broken plastic gears you did a while ago. My gears broke also but I bought a set of replacement gears off of you tube from a fellow in India. He used CNC machining techniques to copy three of the gears in brass. They work great!

[@TerryMcKean]

14:45

[@theradiomechanic9625]

HI Buddy, I keep a selection of good used tube sockets and "steal" a pin as needed to do that same repair. Removing all those connections to replace the entire socket can lead to broken resistor etc.

[@larrysherwood9]

Excellent video Buddy. Hope your feeling better.

[@bundylovess]

Nice repair buddy good tip on cleaning tube socket pin big thumbs up

[@mikesradiorepair]

LOL, real HAM radios suck on AM transmit. :-) Nice to see the LA module finally showed up. Noticed what looked like metal film resistors in the one parts bag you got. Probably fine for the Fender amp but watch them on transmitters. Accidently ordered the wrong resistors a few years ago and the working voltage rating was lower then what was in the radio. They lasted about 2 minutes and went open. No smoke, no snap crackle and pop, still looked new and just went open. Learned my lesson there, read the spec sheet first.

[@vetterfellow]

Splendid Buddy.....

[@MrBugsier5]

nice job again!

[@1903A3shooter]

Wow, 75 years old and never thought about taking the pin out of a tube. Dont work on gear like I did in the old days but fun to watch you. That is a great looking Collins rig. Clean and sharp. Thanks for Video, Dave W4GSM

[@wa6gxq]

Great video buddy!

[@larryk4mu240]

Hi Buddy good video. Nice old 2A. Hope you video the NCX-3, I have one to start refurbishing either next or after a 700CX. Glad you're on the mend. 73

[@cuban9splat]

Yes, I agree, I would keep the original sockets in it. Wow, thanks for the good tip about cleaning those octal sockets. I had never thought of pushing the socket pins out and cleaning them. Can you do that with 6 pin and 9 pin miniature tube sockets too? Excellent video Buddy. Thank you

[@johnbellas490]

Buddy thanks for that socket repair tip with the pins !! I was just working on an old Tube type amp, Its a MASCO 27 that has the same problem with one or two pins on one of the 6L6 final tubes that is making intermittent contact right now, so I will tryyour tip on pin removal cleaning and repair ! The amp is a nice working amp otherwise but I had to do a total RECAP and RESISTOR replacement, ALL the resistors had drifted to TWICE the value or higher !!