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

Fairbanks Morse Model 8a Problem
#4

Thanks for responding Ron.... I have 300v at the plate of the 6k7 located by the 5y3 and 6v6 tube.  The 6k7 on the other side of the chassis has 300v at the plate when the band selector switch is moved to either of the short wave
bands.  I have voltage going to the rf coil, the antenna coil only seems to have heater voltage going to it or I should say the broadcast band of the selector only has heater voltage for the dial lamps. (I don't mind telling you I'm still not the greatest reading schematics so some things slip by me)  Pin 4 of the 6k7's in turn
have 150v instead of 105v.  I did a simple continuity check on the rf coil and every lug had a partner. Ran out of time and did not do the antenna coil. Is that the only test I can do? I did not see where the antenna coil would have any other voltage going to it unless I'm missing something in the selector switch itself. (Both trimmer coils (screws #1,2,3,4,) are good cleaned and working) 

Thanks for the advice on the antenna lug.....I had it where the schematic showed and picked up nothing. I removed it from that 6k7 plate terminal on the band selector and have it on the middle rod going from the selector center gang to the center band switch for now (must be 1st shortwave?) Guess that could be 1st indication of an antenna coil issue?
    
Bob

      


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: 1 Guest(s)
[-]
Recent Posts
Model 70 Cabinet Trim
musar , Well if you have any more questions feel free to post away . Sincerely Richardradiorich — 08:56 PM
Model 70 Cabinet Trim
Although I have not made any cabinets or cabinet parts for a couple of years, I still have some parts left over, includi...Steve Davis — 06:26 PM
philcorepairbench.com - shadow-meter
Thanks Ron.fenbach — 02:43 PM
Model 70 Cabinet Trim
Thank you, Gary. Before making my original post, I had clicked on "Steve Davis Cabinets" only to find that it...musar — 02:25 PM
philco predicta
Welcome to the Phorum, cgl18! I am not your resource for television repair, but lots of friendly help is available here...GarySP — 02:12 PM
Model 70 Cabinet Trim
Welcome to the Phorum, musar! You can send Steve Davis a private message (PM). The site is at the top of the Home page...GarySP — 02:09 PM
Model 70 Cabinet Trim
How do I contact him? The only contact information for him I could find when searching online was a telephone number th...musar — 10:38 AM
philco predicta
Hello, good afternoon, I would like to ask what the possible problem could be if I don't have an image on the screen. I ...cgl18 — 10:19 AM
Philco model 38 code 121 not receiving signal.
So one last question before I finish this radio. Regarding the speaker and output transformer. I salvaged the original o...Stormlord5500 — 09:31 AM
462ron
It’s on the bottom of the homepage of our Philcoradio.com homepage! Ron462ron — 07:20 AM

[-]
Who's Online
There are currently 581 online users. [Complete List]
» 1 Member(s) | 580 Guest(s)
Avatar

>