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recapping an Adcom 545 Utility Plugins
Old 13th September 2011
  #1
Gear Head
 

recapping an Adcom 545

I've read all the GS threads I could find on recapping an Adcom GFA-545.

In this thread, Jim Williams recommends the following for a GFA-545 II:

Quote:
These are the designs with a servo for the output which floats the input up to 1/2 volt. There is a large Mylar cap for blocking. I use a Wima MKC-2 polycarbonate 3.3 uf/100 v cap, fits perfectly. Bypass with an InfiniCap .01 uf. Yank out the 47 uf shunt gain cap and install a 100 uf 50v Black Gate, bypass with a 3 uf MIT and the InfiniCap. Stuff a bunch of .1 uf 600 v MIT PPMFX multicaps across the power supply caps. Stick in some Kimber AGSS silver wire from the RCA's to the pcb's.

Jim Williams
Audio Upgrades
I have a few questions:
  1. Does this recommendation apply verbatim for recapping the original "Mk-I" (i.e., not Mk-II), or do I need to make any changes to the plan?
  2. It looks like the Black Gates are virtually impossible to find. What's the best alternative?
  3. Where do y'all source high-end caps? (Want to sell any to a fellow GS-er?)
  4. Any warnings before I pry this open and start desoldering (besides the obvious high-voltage, don't be an idiot stuff)?
  5. Anyone have a service manual they could PM me?

Thanks for your time!
Old 16th September 2011
  #2
Gear Head
 

Any thoughts at all?
Old 17th September 2011
  #3
Black Gates aren't made anymore, so I would get either a Panasonic FM or Nichicon HE series electrolytic.

The InfiniCaps can be ordered directly or from Michael Percy Audio.
Old 19th September 2011
  #4
Gear Head
 

Thanks, Sean.

Is there any significant difference between the Panasonic FM or Nichicon HE?

Does anyone know whether I should alter the plan in any way for the original (non-Mk II) GFA-545?

I just want to be as prepared as possible before I start ripping this open.

Thanks!
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