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

RCA Q-103 tube ?
#16

(05-17-2016, 04:33 PM)Radioroslyn Wrote:  Well You could try tuning the bcb oscillator by monitoring it's signal in a well calibrated receiver. Use C-6 to set the osc signal heard in the well calibrated receiver at 1755kc (1300+455kc) with the dial set at 1300kc on the RCA. Same thing for the low end of the band. Use L-9 to set the osc heard in the well calibrated receiver at 1055kc (600+455kc) with the RCA dial set at 600kc. It's not uncommon to have so interaction between these two adjustment so you may have to adjust these a few times to get it on the nose. If you can't get the osc to tune from 1055 to 1755kc and your bandswitch is good and clean them I'd replace C-8 and C-11.
The other thing that comes to mind is interference from other electrical devices like cell phone/lap top chargers or computers. They use switching mode power supply and generate a lot of rf noise which can be very strong.

Terry
Set the radios up like you said the signal was picked up at 1755 and peaked using C6 and 1055 using L9 I would say it is a little better but still need to hook up my garage antenna to really get anything. 


Messages In This Thread
RCA Q-103 tube ? - by Eric - 05-06-2016, 03:00 PM
RE: RCA Q-103 tube ? - by Phlogiston - 05-06-2016, 03:35 PM
RE: RCA Q-103 tube ? - by Radioroslyn - 05-07-2016, 12:12 AM
RE: RCA Q-103 tube ? - by Eric - 05-08-2016, 09:42 AM
RE: RCA Q-103 tube ? - by Radioroslyn - 05-08-2016, 07:34 PM
RE: RCA Q-103 tube ? - by Eric - 05-11-2016, 03:35 PM
RE: RCA Q-103 tube ? - by Radioroslyn - 05-11-2016, 04:32 PM
RE: RCA Q-103 tube ? - by Eric - 05-12-2016, 03:20 PM
RE: RCA Q-103 tube ? - by Radioroslyn - 05-12-2016, 03:57 PM
RE: RCA Q-103 tube ? - by Eric - 05-13-2016, 08:58 AM
RE: RCA Q-103 tube ? - by Eric - 05-17-2016, 11:02 AM
RE: RCA Q-103 tube ? - by Radioroslyn - 05-17-2016, 04:33 PM
RE: RCA Q-103 tube ? - by Eric - 05-19-2016, 04:51 PM
RE: RCA Q-103 tube ? - by Eric - 05-18-2016, 07:19 PM
RE: RCA Q-103 tube ? - by Radioroslyn - 05-18-2016, 07:54 PM
RE: RCA Q-103 tube ? - by Eric - 05-19-2016, 10:45 AM
RE: RCA Q-103 tube ? - by Radioroslyn - 05-19-2016, 06:16 PM
RE: RCA Q-103 tube ? - by Eric - 05-20-2016, 11:55 AM
RE: RCA Q-103 tube ? - by Radioroslyn - 05-20-2016, 09:16 PM



Users browsing this thread: 6 Guest(s)
[-]
Recent Posts
12' Philco
If it is 12', either Kareem or Andre would have to jump pretty high to look at the front panel. Kareem would have an e...morzh — 01:48 PM
12' Philco
And here's a story about the tires on the truck. Same "no-stoop" guy must have installed these! Take care a...GarySP — 01:17 PM
Hickok AC51 tube tester
I think they have only shown the secondaries of the transformer. Two of them feed the rectifiers' filaments.morzh — 12:58 PM
IF can wire size and Rubber mounts?
Arran If the wire inside cans is the gauges you mentioned, the sole reason for that would be mechanical, to stiffen t...morzh — 12:56 PM
12' Philco
Rod, Yes, I know, but the Giant Philco is not around anymore either, so I go by whoever was alive fairly recently. H...morzh — 12:54 PM
Hickok AC51 tube tester
Absolutely no one is going to reverse engineer that circuit. Even the iron core is missing.RodB — 10:37 AM
IF can wire size and Rubber mounts?
Thanks to both members for your help regarding wire and tuner mtg supports. regards--Johngeorgetownjohn — 09:33 AM
Hickok AC51 tube tester
Note that no power cord, power switch, or power transformer switch are shown. That (along with my experience with full s...DaleHCook — 07:09 AM
IF can wire size and Rubber mounts?
A pair of wire strippers can give you an idea of what the existing gauge of the wire leads are in the IF can, I think it...Arran — 06:07 AM
My last cabinet for this year
Hello Dan, That is really beautiful what great looking radio you have ! I have friends who live in Calgary and the wea...radiorich — 01:51 AM

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

>