The PHILCO Phorum
Full Recap vs Break/Fix Repair: Vintage Receiver - Printable Version

+- The PHILCO Phorum (https://philcoradio.com/phorum)
+-- Forum: Various and Sundry Categories (https://philcoradio.com/phorum/forumdisplay.php?fid=37)
+--- Forum: Vintage Hi-Fi, Stereo and Audio (https://philcoradio.com/phorum/forumdisplay.php?fid=30)
+--- Thread: Full Recap vs Break/Fix Repair: Vintage Receiver (/showthread.php?tid=26501)


Full Recap vs Break/Fix Repair: Vintage Receiver - radiorich - 05-19-2026

Hello everyone, 

Here’s a great video on when to do a full recap and when to skip it and just replace the bad capacitor or part . 

Sincerely Richard
[Video: https://www.youtube.com/watch?v=7X8sE9LF1MY]

RE: Full Recap vs Break/Fix Repair: Vintage Receiver - morzh - 05-19-2026

Sorry, Rich,

It is such a bull video, I watchyed 2 minutes, then jump 2 minutes ahead, and could not help my wild urge to close it. Which I did.

RE: Full Recap vs Break/Fix Repair: Vintage Receiver - radiorich - 05-19-2026

Hello Mike,
Yes, there’s a lot left out of this video, like my current project with the Pioneer amp. I’m not going to replace every electrolytic capacitor, but I am rebuilding the power supply board and the audio amp board. There are some Sanyo caps I’ll replace since they’re just poor quality capacitors and I often find them bad.

Sincerely Richard

RE: Full Recap vs Break/Fix Repair: Vintage Receiver - Arran - 05-20-2026

Mike, Richard:
When I opened this thread I thought maybe this was a debate over repairing or restoring a tube radio, but even these are stereo receivers from the 1970s, my opinion is the same. These receivers are approaching 50 years old, if not older, when I got my first tube radio in 1984 it was an AC/DC set of 1947 vintage, it was only 37-38 years old. Later, in the mod 1990s I tried a repair as you go experiment on an early 50s Stromberg Carlson, it played fine for about a year, then I had to pull the chassis again, replaced another paper cap, it lasted another 6 months before I had to pull it again, and then I changed all the paper caps, and I never had to deal with it again.
From what I have heard the S.S stuff is not quite the same, some electrolytics hold up, whilst others are dead on arrival, but I also heard the same about the paper caps in the RCA AC sets of the late 1927s, that didn't stop one in a Radiola 44 I have from shorting out. I don't like pulling a set apart multiple times to fix a future fault, age makes parts fail, if I intend to use a device regularly, I am going to overhaul it.
Regards
Arran

RE: Full Recap vs Break/Fix Repair: Vintage Receiver - radiorich - 05-20-2026

Hello Arran,
Yes, I know where you are coming from and just like the Pioneer SA-9500 on my bench waiting for capacitors it was built in 1976 .
Maybe I should change this post to debate over repairing or restoring a solidstate or tube Hifi gear including radios .

Sincerely Richard

RE: Full Recap vs Break/Fix Repair: Vintage Receiver - morzh - 05-20-2026

Basically the guys starts like, OK, I fixed that set, and in two years it landed back on my table, because these older caps, that I found to be good, quit.
But despite that, I will tell you why I think we should not necessarily do the full recap on the older electronics.

I am not sure I follow that logic or see good practicality of the approach.

RE: Full Recap vs Break/Fix Repair: Vintage Receiver - radiorich - 05-20-2026

Hello Mike,
Yeah, that’s why on my last receiver, the RadioShack one from 1979, I replaced almost every electrolytic capacitor except for about four of them, which came to a whopping total of 69.

Luckly this pioneer amp does not have as many and far as older sets like my tube radios I don't chance any I replace them all.
Sincerely Richard

RE: Full Recap vs Break/Fix Repair: Vintage Receiver - MrFixr55 - 05-20-2026

A very interesting video, well done, although it covered mostly solid state equipment which is heavy on electrolytics. The picture of a cut up multiunit electrolytic can was certainly instructive. So is a pic of the innards of an old "wet" electrolytic. (They are no longer wet, and usually short when they go bad.)

When I recapped my dead Zenith 3000 TO, operation was restored. I don't own an ESR tester, and probably will buy one, but considering the green corrosion on the positive leads of all electrolytic caps in the set, and that the set was 62 years old, and there were about 10 caps in the set, the argument for wholesale recapping was strong.

On the other hand, my 8G005 TO is fully functional and every part in the set down to the tubes, caps, resistors, etc. are original!

I think for some of the more simple sets that we deal with, the argument for wholesale recapping is also strong based on age, high failure mode for power supply electrolytics and paper foil caps and (relative?) ease of replacing caps. Doing a TV or a mid 70s stereo receiver

I have 2 Yamaha mixers that are now about 25 years old. Each channel of a mixer has at least 3 stages, coupled by electrolytic caps, the tone (or EQ stage) has several caps, the power supply, etc. Multiply that by 16 (the amount of channels) add the 2 "group" busses, the main bus, The Control Room and Headphone amps, the Effects In and Out, and OMG, the amount of work needed to recap this!! Fortunately, I run the unit on batteries instead of AC. (The power supply for this unit is a 36V CT transformer, feeding a bridge rectifier, so two 24V power tool batteries do the trick.)

Only issue is the "phantom" supply, but most all inputs to this board are wireless mic receivers. The rest are dynamic mics as this rig is used outdoors, and previous experience with our small diaphragm choir mics resulted in a lot of wind noise and a $450 mic got totaled when one of the Church maintenance guys closed a truck door on it. The director and I are the sole people who transport this equipment now (especially as I own most of it).

RE: Full Recap vs Break/Fix Repair: Vintage Receiver - radiorich - 05-20-2026

Hello Mr Fixxr,
I hope to restore my Zenith 3000 this winter it is not the best looking with some cosmetic issues but it will work and it was free !
I did buy one those cheap ESR meters plus I have my Sencore LCR meter that will put real working voltages on electrolytics not like that $10. ERS tester.

Far as capacitors the real pain are those surfacemount type the round silver cans .
like in my Sony Walkman TV's and Apple computers.
Sincerely Richard

RE: Full Recap vs Break/Fix Repair: Vintage Receiver - TV MAN - 06-26-2026

I just saw this and am going to jump in. On solid state, I think it depends on the brand of the cap. When I worked on Sears TV's back in the 80's, it would often be a lighter gray color that failed, usually the higher voltages, in the Vertical, and power supplies. The Toshiba made sets were recommended to replace those all in the vertical when in for service. I seldom had to change any lower voltage caps elsewhere.

 I noted that when I recapped my Dynaco PAT4, it DID wake it up - but wasn't remarkable either. I have an original - only changed the output transistors due to static, etc and have been running it for years in my radio room. Still plays perfectly.  Well, let me back up, I did go ahead and change the output coupler caps since I was staring at them anyway. 

On the tube stuff, yeah, I normally replace any paper or elecrolytics for the reason mentioned above. They WILL fail. However, there certainly is a quality difference, where I always have to replace on ac/dc radios, TV's, and some HiFi. Now, I say "some", because it seems they used higher quality caps on a lot of those, and I've had some come up with zero issues. And keep running with same. For long term, yeah, recap 'em. But, lytics are lytics, and power transformers are expensive.