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

Single wire antenna has stray voltage- solved
#6

Terry,
i thought about nulling signals like if im on talk radio 960 on the philco and i tune to 960 in the garage on the hallicrafters,, if they both are on there would be a problem.  Only one radio will ever be on at one time. I did test with both radios on by doing a random AM station on the philco and a different AM station on the S-38, no issues.

what i dont understand is what was that voltage?

also right now without jumpers from G and A2 on both radios, i dont have an issue so both are tied to the antenna.

i just wondered where this voltage was coming from,, like the filter caps or something?  i dont see how on both diagrams for the hallicrafters or the Philco a path for current flow through the anenna components and parts.

I need to see if the philco does the same thing if i put a jumper on antenna screw 2 and 3 and leave the random wire on #1.





Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
Shadow Meter Bulb
Butting in here with a question. Since the shadow meter is connected directly to the 1st and 2nd I.F.'s wouldn't the met...RossH — 06:43 PM
HiFi (Chifi) tube amp build - but my own design.
Mike, Tim; you are about to enter the twilight zone. Doo doo doo doo, doo doo doo doo This is something alright. I'm go...RodB — 06:26 PM
HiFi (Chifi) tube amp build - but my own design.
:lol: We need to start a singing radio group! I play the guitar, so maybe get a few vocals? Anyways, Mike, I did try mou...TV MAN — 05:56 PM
HiFi (Chifi) tube amp build - but my own design.
And so does a barber shop quartet. mmmmmmRodB — 03:54 PM
Shadow Meter Bulb
I did try an LED bulb in place of the original but wasn't impressed with the amount of light on the dial. Seems like it ...RodB — 03:51 PM
HiFi (Chifi) tube amp build - but my own design.
Tim Would mounting he transformer vertically change the hum, if used without additional parts? Also, in these amps...morzh — 02:25 PM
Shadow Meter Bulb
Gary I doubt it would introduce any noise. We use similar lamps for the panel indication, 12V AC lamps: they are LEDs...morzh — 02:15 PM
Shadow Meter Bulb
Not sure if anyone has tried this but there are 6.3 volt miniature lamps in bayonet and screw-in base options available ...GarySP — 11:31 AM
Shadow Meter Bulb
Any 6.3 volt pilot light will work. I would use the brightest one I could find in my workroom. Be sure the dial is clean...RodB — 10:45 AM
HiFi (Chifi) tube amp build - but my own design.
Tim, nice write up and thanks for sharing !! Sincerely Richardradiorich — 02:47 AM

[-]
Who's Online
There are currently 6908 online users. [Complete List]
» 1 Member(s) | 6907 Guest(s)
Avatar

>