'79 Fender 135W cap replacement questions
I need to replace my capacitors in my '79 Fender Twin 135W (export model). Here is what is under the cover now.
All Mallory (I would assume they have never been changed).
No. 1--220 MFD 285 VDC (leaking)
No. 2--220 MFD 285 VDC (leaking)
No. 3--20 MFD 500 VDC
No. 4--20 MFD 500 VDC
No. 5--20 MFD 500 VDC
No. 6--70 MFD 100 VDC
No. 7--70 MFD 100 VDC
I know they don't have direct replacements, so
(1) which numbers should I order?
(2) where to order them from?
I will get a friend of mine to install them. He has electronic experience, but I didn't asked him what type to get. I would rather get some insight from this Fender site.
Thanks for your help.
Re: '79 Fender 135W cap replacement questions
Hammond, check this out:
http://www.thefenderforum.com/forum/...ad.php?t=32862
I went through this process about a year ago. These are the values I used:
TAD Caps
(2) 220uF @ 350V 25x50mm
(3) Audio Cap 20uF @ 550V 25x50mm
(2) 70uF @ 350V 18x40mm
You've got 6 more electrolytics on the other side of the chassis that are probably also ready for a change. The 5uF 50V on my chassis was leaking, I replaced it with the 4.7uF 63V.
No Name Caps
(1) 4.7uF 63V
(5) 25uF @ 25V 8x16mm
Re: '79 Fender 135W cap replacement questions
Get the Sprage brand, Atom serise caps from Mojo tone, Antique electronics, or Mouser supply.
Re: '79 Fender 135W cap replacement questions
Don't bother with Sprague. Their large size is an illusion. Cut one in half, and there's lots of empty space. There's pix on the web. Vishay is trying to phase them out.
Re: '79 Fender 135W cap replacement questions
If you're getting caps from AES, get F&Ts.
Re: '79 Fender 135W cap replacement questions
Quote:
Originally Posted by
Kap'n
Don't bother with Sprague. Their large size is an illusion. Cut one in half, and there's lots of empty space. There's pix on the web. Vishay is trying to phase them out.
Not that they're bad caps, on the contrary, they're good, but they only exist for NOS applications that call for that specific, large vintage size. As Kap'n mentioned:
http://www.tjadamowicz.com/amps/gallery/SpragueAtom.jpg
There's nothing wrong with Xicon electrolytics. I've used them in several SF Reverb cap jobs, including a Twin.
http://www.tjadamowicz.com/amps/gallery/SFTR/SFTR08.jpg
Quote:
Originally Posted by
JAM
If you're getting caps from AES, get F&Ts.
I'm going to try them in my next build I think. Have you tried them, JAM?
