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

RCA 811k expert advice needed
#5

Do try a good aerial/antenna first. This will help, as the efficiency of short antennas is very much compromised on broadcast band, and this gets worse as you go towards the 520 kHz end.

Does your set have a loop antenna/wave magnet in the console, or just the connection for a wire?


Caps can cause trouble. On my 110K, I did had to track down a bad mica cap in the RF section for one of the shortwave bands. I could not get the required adjustment with the trimmer during alignment. This band was created with several fixed caps, leaving the main tuning cap only making very small changes to the overall combined capacitance. Drift in the fixed caps did not have to be much to cause a big effect. That shouldn't be such a problem on the regular "broadcast" band.

I don't hold with furniture that talks.


Messages In This Thread
RCA 811k expert advice needed - by murf - 06-11-2019, 05:28 PM
RE: RCA 811k expert advice needed - by Chas - 06-11-2019, 09:09 PM
RE: RCA 811k expert advice needed - by murf - 06-16-2019, 09:30 AM
RE: RCA 811k expert advice needed - by EdHolland - 06-17-2019, 08:52 PM



Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
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
Part numbers to model cross
Jim, We have this index put together by Dale Cook but I don't think that is quite what you are looking for. The Parts...klondike98 — 09:37 PM
Philco Model 38-7: what caps & resistors do fail typically?
Yep the dim bulb test is OK but I'd definitely replace all those electrolytics before I did it. Since those #47 conden...klondike98 — 09:18 PM
Philco 42-345 Restoration/Repair
The resistor is a 2.2 Meg, it was the last one I hadn't replaced. The broadcast is coming in after replacing it.osanders0311 — 09:09 PM

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

>