Vintage 1963 AC30
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Vintage 1963 AC30
Hi Guys,
Thought I would share. I was asked by my son to help repair this old amp that belonged to his pastor. Naturally I said yes. Always wanted to get inside and also play one of these vintage specimens. The amp was in bad shape. After emitting smoke, it was boxed and lay in a store room for years. Obviously, the amp had been repaired/serviced by a stupid tech prior to its demise. I believe the amp was donated to the church.
The amp was filtered with this.. 100, 100, 100, 47 & 47uf !!!!
Replaced with this (JJ 40, 20, 20) and 2 x 10uf (Rubycon) No wonder the GZ34 was toast!!
Thought I would share. I was asked by my son to help repair this old amp that belonged to his pastor. Naturally I said yes. Always wanted to get inside and also play one of these vintage specimens. The amp was in bad shape. After emitting smoke, it was boxed and lay in a store room for years. Obviously, the amp had been repaired/serviced by a stupid tech prior to its demise. I believe the amp was donated to the church.
The amp was filtered with this.. 100, 100, 100, 47 & 47uf !!!!
Replaced with this (JJ 40, 20, 20) and 2 x 10uf (Rubycon) No wonder the GZ34 was toast!!
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If it sounds good, it is good! Trust your ears
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Re: Vintage 1963 AC30
The Blues needed some attention! One of them was in very bad shape and will need a recone (had a hole right through it and a bad previous patch job.
After replacing the output tubes, 1x GZ34 and a pre amp tube, replace a bad Cathode resistor (was 2 x 2w!!)... The amp sounds incredible. These are great sounding amps. This is the non top boost version.You do not have the required permissions to view the files attached to this post.
If it sounds good, it is good! Trust your ears
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Re: Vintage 1963 AC30
What a great opportunity. Thanks for posting.
Re: Vintage 1963 AC30
Hey! Where's the photo of the components ? You holding out on us?
I build and repair tube amps. http://amps.monkeymatic.com
Re: Vintage 1963 AC30
+1Hey! Where's the photo of the components ? You holding out on us?
Nice! Does it still belong to the church? Do they know what it's worth? If it's still theirs you might want to do the most non-invasive restore, get the recone done, and then sell it for them. They could buy a used off craigslist: HRD or BFDR-RI, BFTR-RI or even a Chinese CC2 AC30 and spend the rest of the money on God's work... or gilding the ceiling with Putti, or a new limo for the pastor...
Last edited by rp on Mon Apr 03, 2017 5:02 pm, edited 4 times in total.
Re: Vintage 1963 AC30
...unless this guy is the pastor, in which case they should keep it.
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Last edited by rp on Mon Apr 10, 2017 8:37 pm, edited 4 times in total.
Re: Vintage 1963 AC30
double post
Last edited by rp on Mon Apr 03, 2017 4:53 pm, edited 1 time in total.
Re: Vintage 1963 AC30
double post - i kept hitting quote for edit. sorry!
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Re: Vintage 1963 AC30
SORRY, for some reason, pics are poorly oriented!
Gut shots.... WIMA polystyrene' (voodoo cap)
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If it sounds good, it is good! Trust your ears
Re: Vintage 1963 AC30
They look cool but it's a good idea to check those Wima Tropyfols for dc leakage.
It looks as if one of those between the LTP and power tube grids may have failed and been replaced?
Have fun!
It looks as if one of those between the LTP and power tube grids may have failed and been replaced?
Have fun!
My band:- http://www.youtube.com/user/RedwingBand
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Re: Vintage 1963 AC30
Pastor has collected the amp and is happy.
If it sounds good, it is good! Trust your ears
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Re: Vintage 1963 AC30
I'm pretty sure the WIMA Tropyfol F caps are polyester film/foil types?
Re: Vintage 1963 AC30
If the coil isn't rubbing, I'd be tempted to repatch that hole with some layers of heavy duty tissue applied with weak cement or dope just to see what it sounds like with a patch (before re-coning that is)andresound wrote: โMon Apr 03, 2017 6:18 am The Blues needed some attention! One of them was in very bad shape and will need a recone (had a hole right through it and a bad previous patch job.
IMG_0716.JPGIMG_0717.JPG
He who dies with the most tubes... wins
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Re: Vintage 1963 AC30
Hole was patched as you described (tissue paper with diluted wood glue). Sounds great, but obviously not as perfect.
If it sounds good, it is good! Trust your ears
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Re: Vintage 1963 AC30
Not sure... above my pay grade
If it sounds good, it is good! Trust your ears