Welcome Guest! Be sure you know and follow the Phorum Rules before posting. Thank you and Enjoy! (January 12) x

Thread Closed
Thread Rating:
  • 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5

Fisher 800B Restoration
#27

Just a quick update on progress of the receiver.
 Got the rectifier installed. This pic. is in the trial stage. I wanted to locate it away from the 15 ohm 5 watt resistor so I used a terminal strip.
[Image: http://i1336.photobucket.com/albums/o654...virhco.jpg]  Also installed a line safety cap and a inrush current limiter.
[Image: http://i1336.photobucket.com/albums/o654...0tpetj.jpg
 Changed out the coupling capacitors and added the 4-10 ohm 1/4 watt resistors to the output tubes.
[Image: http://i1336.photobucket.com/albums/o654...xmfhe7.jpg]  So far so good. I did run into a problem on one of the 12at7 tubes in the MPX section.
 tube V100 called for 95v on the plate and 7v on cathode. On 1/2 of tube.  I was getting .855v on cathode and 129v on the plate.
 I changed the tube and still not correct but better. Now getting 5v on cathode and 112v on plate.
 Checked the resistors in that part of circuit and they are all very close or spot on.
The second half of tube the voltages are correct.
  It's playing very well on the bench but does have some scratching while tuning .
I'll be addressing that tomorrow with a good cleaning of the tuner.
 If anyone has ideas about the V100, tube voltage please let me know.


Messages In This Thread
Fisher 800B Restoration - by KCMike - 02-10-2017, 09:26 PM
RE: Fisher 800B Restoration - by Mondial - 02-11-2017, 12:19 AM
RE: Fisher 800B Restoration - by TV MAN - 02-11-2017, 10:48 AM
RE: Fisher 800B Restoration - by KCMike - 02-11-2017, 11:19 AM
RE: Fisher 800B Restoration - by Mondial - 02-11-2017, 12:05 PM
RE: Fisher 800B Restoration - by morzh - 02-11-2017, 12:29 PM
RE: Fisher 800B Restoration - by KCMike - 02-11-2017, 12:30 PM
RE: Fisher 800B Restoration - by Mondial - 02-11-2017, 12:43 PM
RE: Fisher 800B Restoration - by KCMike - 02-11-2017, 01:21 PM
RE: Fisher 800B Restoration - by Mondial - 02-11-2017, 01:29 PM
RE: Fisher 800B Restoration - by KCMike - 02-11-2017, 04:58 PM
RE: Fisher 800B Restoration - by Mondial - 02-11-2017, 05:49 PM
RE: Fisher 800B Restoration - by TV MAN - 02-12-2017, 03:34 PM
RE: Fisher 800B Restoration - by KCMike - 02-12-2017, 05:03 PM
RE: Fisher 800B Restoration - by Ron Ramirez - 02-12-2017, 05:31 PM
RE: Fisher 800B Restoration - by TV MAN - 02-12-2017, 09:14 PM
RE: Fisher 800B Restoration - by Ron Ramirez - 02-12-2017, 10:54 PM
RE: Fisher 800B Restoration - by KCMike - 02-12-2017, 11:02 PM
RE: Fisher 800B Restoration - by sam - 02-13-2017, 01:10 PM
RE: Fisher 800B Restoration - by Ron Ramirez - 02-13-2017, 01:27 PM
RE: Fisher 800B Restoration - by TV MAN - 02-13-2017, 01:29 PM
RE: Fisher 800B Restoration - by KCMike - 02-18-2017, 10:11 PM
RE: Fisher 800B Restoration - by Mondial - 02-19-2017, 09:26 AM
RE: Fisher 800B Restoration - by KCMike - 02-19-2017, 07:52 PM
RE: Fisher 800B Restoration - by Mondial - 02-19-2017, 08:34 PM
RE: Fisher 800B Restoration - by KCMike - 02-19-2017, 08:46 PM
RE: Fisher 800B Restoration - by KCMike - 02-21-2017, 11:04 PM
RE: Fisher 800B Restoration - by Mondial - 02-22-2017, 10:05 AM
RE: Fisher 800B Restoration - by TV MAN - 02-22-2017, 12:49 PM
RE: Fisher 800B Restoration - by KCMike - 02-23-2017, 05:36 PM
RE: Fisher 800B Restoration - by KCMike - 02-28-2017, 05:08 PM
RE: Fisher 800B Restoration - by KCMike - 03-02-2017, 11:35 PM
RE: Fisher 800B Restoration - by Clayvu - 04-12-2019, 10:36 PM



Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
Philco Model 38-7: what caps & resistors do fail typically?
Since you stated earlier, you have a console 38-7XX.  They also had a 38-7T (table), and 38-7CS (chairside).  A very nic...GarySP — 01:18 PM
Part numbers to model cross
That I wouldn't know, but sometimes the radio document itself shows one, same as the capacitor cans' etc pinouts.morzh — 12:46 PM
Part numbers to model cross
Thank you morzh, that is exactly what I was looking for. Now , is there some where that shows pinouts for Philco power ...Jim Dutridge — 11:37 AM
Restoration of the Canadian General Electric A-87
Thanks for your help Michael. In fact, this video is only an intermediate result. Later I had to apply another tinting l...RadioSvit — 09:01 AM
Restoration of the Canadian General Electric A-87
Great job on the cabinet. PS. In the US notation, "kenotron" refers to specific type of tubes; we call re...morzh — 08:24 AM
Part numbers to model cross
This document has at least some tables of models and parts used. Example: Choke 32-7572, used in 604 radio. Search f...morzh — 08:19 AM
Restoration of the Canadian General Electric A-87
I also checked all the radio tubes on my Hickok 530 tube tester. The 5Z3 kenotron turned out to be faulty, all the other...RadioSvit — 08:02 AM
Restoration of the Canadian General Electric A-87
Well... While the varnish is drying up, I started repairing the chassis... Of course I started by replacing the pa...RadioSvit — 07:12 AM
Philco Model 38-7: what caps & resistors do fail typically?
Hello Martin, Welcome aboard our little community what great Model 38-7 Sincerely Richardradiorich — 12:30 AM
Philco Model 38-7: what caps & resistors do fail typically?
Welcome to the Phorum Martin. I count about 9 paper caps, the 3 electrolytic caps and 2-Y2 safety caps to replace th...RodB — 09:44 PM

[-]
Who's Online
There are currently no members online.

>