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#11 |
On Hiatus
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The reg is not part of the Adcom circuit. That looks like the Kit Ryan regulator from Audio Amateur.
Dudeman, did you try what Nelson suggested? Since he designed that amp, he should know... ![]()
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"You tell me whar a man gits his corn pone, en I'll tell you what his 'pinions is." |
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#12 |
The one and only
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It's not a fix - it's a diagnostic tool.
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#13 |
diyAudio Member
Join Date: Sep 2011
Location: USA
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Nelson,
Yes I understand that. I guess if I would have thought before I asked that question it would have dawned on me that it would work on any amp. Thank you for the reply. I am looking forward to firing up this vintage 86' amp when my 565 gets here tomorrow. I am really tickled that I got one of the early Adcoms that you designed. Everything is still solid except leaching of thermal compound from the rectifier bridges and output boards. Kevin Last edited by PreCD; 6th October 2011 at 04:02 AM. |
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#14 |
diyAudio Member
Join Date: Feb 2004
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Bump. I'm having a bit of noise/buzz from the left channel of my original GFA-555. Pretty faint but louder than the right channel and audible in a quiet room from 10 ft away. I bought the amp around 13 years ago, it had one power cap replaced at the time.
I intend to run this pretty hard for PA use in the near future. I'm guessing it would be smart to re-cap the electrolytics, but I'd like to resolve the buzz before dumping time and money into it as a project. Any guesses if the buzz will get worse as I run the amp hard......? Last edited by turbodawg; 13th March 2013 at 02:47 PM. |
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#15 |
Official Court Jester
diyAudio Member
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recap
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my Papa is smarter than your Nelson ! clean ![]() ![]() ![]() |
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#16 |
diyAudio Member
Join Date: Feb 2004
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#17 |
diyAudio Member
Join Date: Feb 2004
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Sooo.....reading the service manual, it looks like C3 x 2, C5 x 2, and C02, C03, C04, C05......that's pretty easy. I'll get the caps on order tonight.
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#18 |
diyAudio Member
Join Date: Feb 2004
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Did some troubleshooting and it's not the amp. Either an issue with my input cables (unusual configuration), EQ, or ungrounded USB interface I'm using. May re-cap in the future but it's a low priority right now.
Last edited by turbodawg; 14th March 2013 at 01:20 PM. |
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#19 |
Official Court Jester
diyAudio Member
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__________________
my Papa is smarter than your Nelson ! clean ![]() ![]() ![]() |
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Thread | Thread Starter | Forum | Replies | Last Post |
Adcom GFA-555 Mk1 channel noise | Dudeman258 | Solid State | 6 | 16th April 2011 06:12 PM |
Adcom GFA-555 mk2 left slight cracking in high freq | lga775 | Solid State | 2 | 4th December 2010 11:30 AM |
Adcom GFA-555 MKii blown channel checklist? | l.a.rossmann | Solid State | 0 | 10th May 2009 07:39 AM |
adcom gfa-5300 left channel overheating | n8tron | Solid State | 0 | 16th January 2009 09:20 PM |
FS:Adcom GFA 555 and GFA 5300 | trusound | Swap Meet | 0 | 13th December 2005 05:06 PM |
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