Need DIY help in Los Angeles area with tube preamp

phrarod · 31st October 2008, 01:29 AM

I have a rare pre-amp that I had asked a tech who did some work on it to disconnect the phono stage. Unfortunately, he's long gone and I'm having trouble reconnecting it up. I found the HV wires that were disconnected and reconnected them but I still have no output from the phono.

I know its something simple I'm not seeing. There are two other disconnected wires but they contain negative voltage and is coming off the filament. I suspect its a negative bias but it measures a proper 1.6 negative bias without them hooked up.

Is anyone in the Los Angeles or West Los Angeles area that would be willing to look at it and say, "Why you idiot! You just need to ....." ('

')

cerrem · 31st October 2008, 01:56 AM

I can help out...
I work in Manhattan Beach at Northrop Grumman...The big white building next to the 405 at the Englewood Ave exit..
I go up to Santa Monica to eat at some restaurants after work...
Email me ..

Chris

phrarod · 31st October 2008, 02:44 AM

Thanks Chris! Email sent.

phrarod · 2nd November 2008, 01:49 PM

Never heard from Chris and now I need to fix this before my amps are sold. Is there anyone else in the area? I sure would appreciate the help.

phrarod · 28th February 2009, 04:17 PM

Thought I'd finish the story. A tech who reads this board was kind enough to come over and discover it was a disconnected wire.

31st October 2008, 01:29 AM	#1
phrarod diyAudio Member Join Date: Aug 2005	Need DIY help in Los Angeles area with tube preamp I have a rare pre-amp that I had asked a tech who did some work on it to disconnect the phono stage. Unfortunately, he's long gone and I'm having trouble reconnecting it up. I found the HV wires that were disconnected and reconnected them but I still have no output from the phono. I know its something simple I'm not seeing. There are two other disconnected wires but they contain negative voltage and is coming off the filament. I suspect its a negative bias but it measures a proper 1.6 negative bias without them hooked up. Is anyone in the Los Angeles or West Los Angeles area that would be willing to look at it and say, "Why you idiot! You just need to ....." ('')

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31st October 2008, 01:56 AM	#2
cerrem diyAudio Member Join Date: Jun 2005 Location: San Diego, CA	I can help out... I work in Manhattan Beach at Northrop Grumman...The big white building next to the 405 at the Englewood Ave exit.. I go up to Santa Monica to eat at some restaurants after work... Email me .. Chris

31st October 2008, 02:44 AM	#3
phrarod diyAudio Member Join Date: Aug 2005	Thanks Chris! Email sent.

2nd November 2008, 01:49 PM	#4
phrarod diyAudio Member Join Date: Aug 2005	Never heard from Chris and now I need to fix this before my amps are sold. Is there anyone else in the area? I sure would appreciate the help.

28th February 2009, 04:17 PM	#5
phrarod diyAudio Member Join Date: Aug 2005	Thought I'd finish the story. A tech who reads this board was kind enough to come over and discover it was a disconnected wire.