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

Model 90 AVC and sensitivity
#1

I got My Model 90 (1-47 tube) chassis cleaned up, re-capped and aligned the best I could (thanks to Dave for lending me his Eico 324!), and so far it seems to be working pretty well. I burned it in overnight, and everything looks pretty stable. All my strong, local stations come in loud and clear, and after a LONG time twiddling the plastic wrench (made out of a Bic pen held over a candle and shoved onto a 1/4-inch bolt head), all the stations appear right where they belong on the dial. Icon_razz

Two things perplex me about this radio: 1. it's supposed to have AVC, but there is a HUGE difference in volume between the strongest and the weakest stations that it receives. Fidelity is fine, and there's no excessive noise, but man, WCCO comes blasting out at 830, and Radio K just whispers in at 770. Is there some adjustment I need to make to get the AVC working?

2. The set isn't all that sensitive, even with my outdoor long wire attached. It gets all the major stations here in the Twin Cities area, but weaker regional stations just aren't there. Night time DXing isn't very good, either. The ones it can pull in sound great, full and strong, but there's no middle ground: it either receives the station or it doesn't. Any ideas?

Thanks in advance.
Mike




Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
Philco 42-345 Restoration/Repair
Hi OSanders, Look carefully at the band switch. Turn it slowly and "wiggle" it around the desired band. ...MrFixr55 — 12:33 AM
5U4 vs 5Z4 tubes
I think that RCA and GE introduced metal tubes in the USA in 1936.  I don't know if they were being made by RCA, GE or b...MrFixr55 — 11:20 PM
Philco 42-345 Restoration/Repair
Vlad95, Thank you for the stringing guides and wow there are so manyosanders0311 — 06:01 PM
5U4 vs 5Z4 tubes
A pre war Hallicrafters, and an early one too, very nice! 1936 is pretty early for metal tubes too, which would explain ...Arran — 05:58 PM
Philco 42-345 Restoration/Repair
Thanks Rod, "When you hear the background hiss and no station it usually indicates that the oscillator quit" ...osanders0311 — 05:52 PM
Philco 42-345 Restoration/Repair
RodB :beerchug:Vlad95 — 10:22 AM
Philco 42-345 Restoration/Repair
Vlad, you nailed it. Swiss and German roots.RodB — 09:54 AM
5U4 vs 5Z4 tubes
Well this is a Hallicrafters SX/9 circa 1936. No real issues so far although I dodged a real bullet with a cap that was...bridkarl — 07:59 AM
5U4 vs 5Z4 tubes
The pinout is the same but the 5U4 has a 3 amp filament, verses 2 amps or less on the 5Z4. I think that the pinout of a ...Arran — 12:04 AM
Philco 42-345 Restoration/Repair
By the way. osanders0311 Take a look here: Dial cord stringing Guides May be here you can fount correct string settin...Vlad95 — 11:15 PM

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

>