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

Fairbanks Morse Model 8a Problem
#10

(01-20-2016, 05:34 PM)Eliot Ness Wrote:  
(01-20-2016, 10:19 AM)bm071 Wrote:  ......I counted all the resistors in the chassis then compared to the schematic and come up 4 short...so far I cannot find 3of the 4.... #59 the 2.2.meg, #22 - 1000ohm and #23 - 15,000ohm.   I cannot see where they may have once been in the circuit is the other problem. The caps are #8,9,38 (I think). 

If those resistors were back in the circuit would that fix my problem or does their placement not affect the low bias, high b+?.......

It depends on exactly which caps and resistors are missing if they might be causing your problem.

I once had a Zenith chassis that had been hacked on and I had to retrace everything to make sure parts were where they should be.  I made a copy of the schematic and used colored pencils to slowly trace things out, correcting problems as I went.  It can be slow and tedious, but you need to find what is missing and try to correct it before doing much more troubleshooting.


Messages In This Thread
Fairbanks Morse Model 8a Problem - by bm071 - 01-15-2016, 10:23 AM
RE: Fairbanks Morse Model 8a Problem - by bm071 - 01-18-2016, 10:24 AM
RE: Fairbanks Morse Model 8a Problem - by bm071 - 01-18-2016, 10:40 AM
RE: Fairbanks Morse Model 8a Problem - by bm071 - 01-18-2016, 08:37 PM
RE: Fairbanks Morse Model 8a Problem - by bm071 - 01-20-2016, 10:19 AM
RE: Fairbanks Morse Model 8a Problem - by bm071 - 01-20-2016, 06:55 PM
RE: Fairbanks Morse Model 8a Problem - by bm071 - 01-20-2016, 06:59 PM



Users browsing this thread: 6 Guest(s)
[-]
Recent Posts
unknown radio
Hello Everyone How have you been doing for so long ? Please, does anyone know this radio ? It looks like the...claude.france — 05:17 AM
Want to get my Philco working again
Hi Perry and welcome, A few notes on the 41-295/300. Probably going to need to replace some of the failing rubber coa...Radioroslyn — 11:23 PM
Want to get my Philco working again
Just one question, Perry. You do know that the NFC North is confirmed LION(s) Territory!?!?GarySP — 09:44 PM
Want to get my Philco working again
There are actually quite the host of parts websites available! There’s Mouser, Digikey, etc. for general electronics com...jrblasde — 09:44 PM
Want to get my Philco working again
Thank you all for the replies. I’ve gotten into old stereos too so soldering isn’t too hard. Good to hear I can get the ...Gbtr6 — 08:23 PM
Want to get my Philco working again
I have one of those that I restored. Not a bad sounding/performing radio. Needs new socket and all new capacitors.rfeenstra — 06:22 PM
Want to get my Philco working again
Welcome to the Phorum, Perry. Your console is a 41-295X. You can access the schematic in our Philco Service found at t...GarySP — 06:21 PM
Want to get my Philco working again
Welcome to the Phorum. The reason the tube broke is probably because of those two gold helmets on top :PRodB — 05:37 PM
Want to get my Philco working again
See, the model, then go to, go to Philco, put the model in, open the document, locate the tube, locate it in the sch. Th...morzh — 03:23 PM
Want to get my Philco working again
Hi all, I have an old Philco radio that i remember fondly from my younger days. It sat out on the porch of my dad's a...Gbtr6 — 03:14 PM

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

>