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Re: Fired up my Kustom Amp For First time in 20+ Years [message #26683 is a reply to message #26682]

Sun, 06 May 2018 06:08

stevem is currently offline

stevem
Messages: 4733
Registered: June 2004
Location: NY

Senior Member

Hello!
Your amp is what we lovingly call a Frankenstein model due its large front top section.
Your amp is not a 70s model it's a 66 to 67 model.
These amps have vericle circuit boards for the preamp channels and the effects boards ps so they are a tad easier to work on then the later B and for sure A series amps with there stacked circuit boards!

Your issue with the hum and a somewhat or fully dead channel is a common one with these models.
These use a ton of electrolytic type caps in the circuits and with age they go back, and without being used as in powered up they go bad even faster!
Many times they physically show signs of them being bad by having a end of them popped open.
In the 1967 models that I have worked on these caps are white and say Mallory on them.
It's no a hard job to replace them, but I would go thru the amp and even replace the ones on the channel that is working as these are cheap items these days.

Please note that these are polarized with a mark or band for the negative end , and the new ones need to be reinstalled the same way.
You can get non polarized ones if you care to do to not have to deal with that issue.
It pays to use new caps of a higher voltage rating then the originals.

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[Message index]

		Fired up my Kustom Amp For First time in 20+ Years By: B-Dubs on Sat, 05 May 2018 21:18
		Re: Fired up my Kustom Amp For First time in 20+ Years By: stevem on Sun, 06 May 2018 06:08
		Re: Fired up my Kustom Amp For First time in 20+ Years By: B-Dubs on Mon, 07 May 2018 12:46
		Re: Fired up my Kustom Amp For First time in 20+ Years By: B-Dubs on Mon, 07 May 2018 12:49
		Re: Fired up my Kustom Amp For First time in 20+ Years By: chicagobill on Sun, 06 May 2018 14:39
		Re: Fired up my Kustom Amp For First time in 20+ Years By: chicagobill on Mon, 07 May 2018 19:04
		Re: Fired up my Kustom Amp For First time in 20+ Years By: B-Dubs on Tue, 08 May 2018 08:32
		Re: Fired up my Kustom Amp For First time in 20+ Years By: B-Dubs on Tue, 08 May 2018 22:22
		Re: Fired up my Kustom Amp For First time in 20+ Years By: stevem on Tue, 08 May 2018 05:53
		Re: Fired up my Kustom Amp For First time in 20+ Years By: B-Dubs on Tue, 08 May 2018 22:29
		Re: Fired up my Kustom Amp For First time in 20+ Years By: chicagobill on Wed, 09 May 2018 00:10
		Re: Fired up my Kustom Amp For First time in 20+ Years By: B-Dubs on Wed, 09 May 2018 08:11
		Re: Fired up my Kustom Amp For First time in 20+ Years By: B-Dubs on Wed, 09 May 2018 08:13
		Re: Fired up my Kustom Amp For First time in 20+ Years By: B-Dubs on Wed, 30 May 2018 21:01
		Re: Fired up my Kustom Amp For First time in 20+ Years By: stevem on Thu, 31 May 2018 06:19
		Re: Fired up my Kustom Amp For First time in 20+ Years By: B-Dubs on Thu, 31 May 2018 15:02
		Re: Fired up my Kustom Amp For First time in 20+ Years By: B-Dubs on Thu, 31 May 2018 15:04
		Re: Fired up my Kustom Amp For First time in 20+ Years By: chicagobill on Thu, 31 May 2018 15:45
		Re: Fired up my Kustom Amp For First time in 20+ Years By: B-Dubs on Thu, 31 May 2018 16:16

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