Cyrus 1 amplifier problem

elaar · 2nd September 2006, 09:34 PM

Hi,

I have a Cyrus one amplifier that over the years has developed a huge hum, can anyone suggest any possible reasons for this? I was thinking perhaps a ground problem, but what are the best methods of testing for this?

Many thanks,
Alex

Zen Mod · 2nd September 2006, 11:04 PM

be more specific
hum with volume on min?
in both channels equally?

Sonusthree · 28th September 2006, 11:56 PM

Given the age of these units I would certainly suspect the Electrolytics.
I'm about to recap my Cyrus Two and PSX. It sounds OK but I'm definitely stretching things expecting them to be good after 11+ years.
Since you did not reply to Zen's post does this mean that you have fixed the problem?

If so I would like to hear how (especially since I own a few Ones and Twos).

If not already fixed then you should definitely provide more details since there are some people around here who have serviced these amps in a professional capacity.

2nd September 2006, 09:34 PM	#1
elaar diyAudio Member Join Date: Oct 2005	Cyrus 1 amplifier problem Hi, I have a Cyrus one amplifier that over the years has developed a huge hum, can anyone suggest any possible reasons for this? I was thinking perhaps a ground problem, but what are the best methods of testing for this? Many thanks, Alex

2nd September 2006, 11:04 PM	#2
Zen Mod Official Court Jester diyAudio Member Join Date: Jan 2003 Location: ancient Batsch , behind Iron Curtain	be more specific hum with volume on min? in both channels equally? __________________ my Papa is smarter than your Nelson ! tnx to clean thread ; Cook Book ; PSM LS Cook Book ; Baby Diyaudio FORUM ; BAF Forum & Gallery

28th September 2006, 11:56 PM	#3
Sonusthree diyAudio Member Join Date: Dec 2005 Location: Brighton,UK	Given the age of these units I would certainly suspect the Electrolytics. I'm about to recap my Cyrus Two and PSX. It sounds OK but I'm definitely stretching things expecting them to be good after 11+ years. Since you did not reply to Zen's post does this mean that you have fixed the problem? If so I would like to hear how (especially since I own a few Ones and Twos). If not already fixed then you should definitely provide more details since there are some people around here who have serviced these amps in a professional capacity. __________________ Martin + + =

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