Lessons from my 800B experience

Posted by caffeinator (A) on March 26, 2007 at 20:07:00

In Reply to: Just got Fisher 800C project - need advice posted by PeterI on March 26, 2007 at 08:21:22:

Ditto the tube checkout - I know there's a lotta tubes in there, but run 'em all through...obviously the outputs are the ones that can do the damage but it's no fun to chase your tail on a problem later only to find it was some front end tube on the way out.

The Fisher output iron is very nice, so definitely take a minute to do the protective wiring of a resistor from cathode to ground on the ouputs, low resistance (0.5; 1 ohm, 10W or so) resistor to protect the outputs in the event of a tube failure.

Finally, power supply and coupling caps should probably be replaced; if you want to preserve the vintage appearance under the hood, you can usually leave the cans on top and wire up modern replacements underneath the chassis.

With the above measures and a good set of tubes, a Fisher 800 is a pleasure to listen to - good tuning capability and sound quality, and very attractive to boot.

Enjoy!

This post is made possible by the generous support of people like you and our sponsors:

Follow Ups Full Thread

Topic - Just got Fisher 800C project - need advice - PeterI 08:21:22 03/26/07 (14)

800C is working perfectly now - PeterI 21:22:16 04/06/07 (0)

Picture of 800C chassis - under - PeterI 11:00:12 03/27/07 (2)

Re: Picture of 800C chassis - under - Ron Oehlert 11:39:03 03/27/07 (1)

Thanks... - PeterI 12:17:45 03/27/07 (0)

Oh...and the FM - caffeinator 20:57:41 03/26/07 (0)

Re: Just got Fisher 800C project - need advice - smollett 20:28:55 03/26/07 (0)

Lessons from my 800B experience - caffeinator 20:07:00 03/26/07 (6)

Re: Lessons from my 800B experience - PeterI 20:20:32 03/26/07 (5)

Fisher 800C schematic - Flatmap 21:22:14 03/26/07 (3)

Re: Fisher 800C schematic - PeterI 06:35:49 03/27/07 (2)

Re: Fisher 800C schematic - Tom Bavis 08:34:10 03/27/07 (1)

Re: Fisher 800C schematic - PeterI 08:54:52 03/27/07 (0)

Re: Lessons from my 800B experience - caffeinator 20:32:26 03/26/07 (0)

If it is problematic, it aint workin' - Ron Oehlert 09:43:12 03/26/07 (0)

Follow Ups

Lessons from my 800B experience - caffeinator 20:07:00 03/26/07 (6)

Re: Lessons from my 800B experience - PeterI 20:20:32 03/26/07 (5)

Fisher 800C schematic - Flatmap 21:22:14 03/26/07 (3)

Re: Fisher 800C schematic - PeterI 06:35:49 03/27/07 (2)

Re: Fisher 800C schematic - Tom Bavis 08:34:10 03/27/07 (1)

Re: Fisher 800C schematic - PeterI 08:54:52 03/27/07 (0)

Re: Lessons from my 800B experience - caffeinator 20:32:26 03/26/07 (0)

You can not post to an archived thread.