Fisher X-100 info/experience/opinions?

Alex R · 10-07-2007, 05:37 PM

In the right forum this time:

I realise this is not a schematic exchange, but if anyone has circuit info on the 1970s Fisher X-100 tube hi-fi amp, or anything else of interest to say, I would be most grateful, not to say reciprocal. Specially the power supply - this one has been converted to SS diodes with a big resistor across them to cut voltage (presumably) - not surprisingly perhaps, given the resistor, the power txr is shorted, and I will be converting it back to a GZ34 when I fit the new txr. I can work out some good values etc but it would be nice to have total 'originality'.

4 x EL84, 6 x preamp valves, ECC83 and ECC832. 275-0-275 into the GZ34 for 350ish volts B+, I'm assuming...

Enzo · 10-09-2007, 03:57 AM

Did you google "Fisher X-100 schematic"?

Alex R · 10-09-2007, 09:30 AM

Well I thought I did but something in your tone makes me want to go and do it again...

Alex R · 10-09-2007, 09:33 AM

Mm... didn't look quite hard enough did I?

Enzo · 10-09-2007, 10:13 AM

Actually it was just a suggestion, I had not done so myself.

Alex R · 10-09-2007, 01:23 PM

- good suggestion because I found a source. Thanks.

10-07-2007, 05:37 PM	#1
Alex R Supporting Member Join Date: Mar 2007 Location: UK Posts: 677	Fisher X-100 info/experience/opinions? In the right forum this time: I realise this is not a schematic exchange, but if anyone has circuit info on the 1970s Fisher X-100 tube hi-fi amp, or anything else of interest to say, I would be most grateful, not to say reciprocal. Specially the power supply - this one has been converted to SS diodes with a big resistor across them to cut voltage (presumably) - not surprisingly perhaps, given the resistor, the power txr is shorted, and I will be converting it back to a GZ34 when I fit the new txr. I can work out some good values etc but it would be nice to have total 'originality'. 4 x EL84, 6 x preamp valves, ECC83 and ECC832. 275-0-275 into the GZ34 for 350ish volts B+, I'm assuming...

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10-09-2007, 03:57 AM	#2
Enzo Senior Member Join Date: May 2006 Location: Lansing, Michigan, USA Posts: 10,333	Did you google "Fisher X-100 schematic"?

10-09-2007, 09:30 AM	#3
Alex R Supporting Member Join Date: Mar 2007 Location: UK Posts: 677	Well I thought I did but something in your tone makes me want to go and do it again...

10-09-2007, 09:33 AM	#4
Alex R Supporting Member Join Date: Mar 2007 Location: UK Posts: 677	Mm... didn't look quite hard enough did I?

10-09-2007, 10:13 AM	#5
Enzo Senior Member Join Date: May 2006 Location: Lansing, Michigan, USA Posts: 10,333	Actually it was just a suggestion, I had not done so myself.

10-09-2007, 01:23 PM	#6
Alex R Supporting Member Join Date: Mar 2007 Location: UK Posts: 677	- good suggestion because I found a source. Thanks.

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