GFP-555

orbanator7577 · 31st January 2012, 08:08 PM

I got laid off today from the government, so I have a ton of free time now. I decided to recap the old Adcom GFP555 and upgrade of OPAMP on it too. It says 1986 inside, so im sure those caps are past their exp date. I ordered all ELNA RFS silk caps and two Nichicon KG Super Through caps. The OP is a 2041DD and im upgrading it to a OPA2132. This should make it sound better. I'll post some pics when it all arrives.

tloftis · 1st February 2012, 01:05 AM

where can I get those parts for mine?

delecoy · 1st February 2012, 01:12 AM

I recapped mine last month. Twas noisy. Not anymore. I'm very glad I did it. Parts can be had from PartsConnexion or Mouser. Being in Austin, parts from Mouser get to my place obscenely quick as theyre just south of Ft Worth. Not so much for the Canadian PartsConnexion.

bassnkeys · 1st February 2012, 02:22 AM

I need a new volume pot for mine. There is an Alps in there that has 3 pairs of connetions, it is tied into the loudness compensation circuit. I need help finding a replacement part OR an idea on how to bypass the loudness. Thanks.

orbanator7577 · 03:14 AM

I typically buy my parts from ebay from sellers I have purchased from in the past. Shipping is about two weeks and you can't beat the prices. Selection is pretty good too.

Should be interesting to see how sounds with a higher grade bur brown opamp in there.

orbanator7577 · 1st February 2012, 03:22 AM

I replaced the speaker terminals from ones I bought on ebay. Solid copper coated in 24ct gold and looks a lot like these:

WBT 0765R Midline Fully Insulated Binding Post Red 093-562

Only I paid 20 bucks for 4 of them.

eBay - New & used electronics, cars, apparel, collectibles, sporting goods & more at low prices

bassnkeys · 1st February 2012, 04:24 PM

Quote:

Originally Posted by bassnkeys

I need a new volume pot for mine. There is an Alps in there that has 3 pairs of connetions, it is tied into the loudness compensation circuit. I need help finding a replacement part OR an idea on how to bypass the loudness. Thanks.

Actually, it may be 4 pairs... it's been a while since I looked... at any rate it's not the standard C CCW CW

orbanator7577 · 08:23 PM

I got a delivery today and changed out what I discovered to be some leaky caps. Still have some caps on order. I already replaced the dual channel OPamp. Im trying to figure out that the other 4 do. I pretty sure 2 are for the phono. It is the other two I am concerned about.

I just have to replace the volume pot as the balance is off a little even with adjustment.

orbanator7577 · 9th February 2012, 08:37 PM

Like this one?

50K ALPS Metal Shaft Type RH2701 Potentiometer POT 8pin | eBay

31st January 2012, 08:08 PM	#1
orbanator7577 diyAudio Member Join Date: Dec 2011 Location: San Antonio, TX	GFP-555 I got laid off today from the government, so I have a ton of free time now. I decided to recap the old Adcom GFP555 and upgrade of OPAMP on it too. It says 1986 inside, so im sure those caps are past their exp date. I ordered all ELNA RFS silk caps and two Nichicon KG Super Through caps. The OP is a 2041DD and im upgrading it to a OPA2132. This should make it sound better. I'll post some pics when it all arrives.

1st February 2012, 03:11 AM	#5
orbanator7577 diyAudio Member Join Date: Dec 2011 Location: San Antonio, TX	I typically buy my parts from ebay from sellers I have purchased from in the past. Shipping is about two weeks and you can't beat the prices. Selection is pretty good too. Should be interesting to see how sounds with a higher grade bur brown opamp in there. Last edited by orbanator7577; 1st February 2012 at 03:14 AM.

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1st February 2012, 01:05 AM	#2
tloftis diyAudio Member Join Date: Feb 2012	where can I get those parts for mine?

1st February 2012, 01:12 AM	#3
delecoy diyAudio Member Join Date: Nov 2011 Location: Austin, TX	I recapped mine last month. Twas noisy. Not anymore. I'm very glad I did it. Parts can be had from PartsConnexion or Mouser. Being in Austin, parts from Mouser get to my place obscenely quick as theyre just south of Ft Worth. Not so much for the Canadian PartsConnexion.

1st February 2012, 02:22 AM	#4
bassnkeys diyAudio Member Join Date: Feb 2011 Location: MN	I need a new volume pot for mine. There is an Alps in there that has 3 pairs of connetions, it is tied into the loudness compensation circuit. I need help finding a replacement part OR an idea on how to bypass the loudness. Thanks.

9th February 2012, 08:37 PM	#9
orbanator7577 diyAudio Member Join Date: Dec 2011 Location: San Antonio, TX	Like this one? 50K ALPS Metal Shaft Type RH2701 Potentiometer POT 8pin \| eBay

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