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


Messages In This Thread
Model 90 AVC and sensitivity - by mgutierres - 09-19-2009, 06:13 PM



Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
Need to purchase some accessories for restoration of my Old Philco Radio
Here is a list of resources found in our online library that you might find useful. Mike's Gobs of Knobs email addres...klondike98 — 01:46 PM
First Radio restoration
Hi Tubeman, Welcome to the Philco Phorum.  Phamily Phriendly Pfun with Phine Pholks Phull of Philco Phacts. (See a p...MrFixr55 — 12:33 PM
First Radio restoration
You could post in the WANTED ADs section here on the Phorum and see if anyone has an RF generator that they want to sell...klondike98 — 11:55 AM
Zenith H725
Good ideas, thank you Arrange and Rich. I have the adhesive aluminum foil already and can try that immediately. More ...EdHolland — 10:18 AM
Graphics for majestic 1050 dial glass.
Murf; I found this thread on the ARF, the first photo has a pretty good view of the dial glass. Regards ArranArran — 01:12 AM
Zenith H725
hello Ed, how about that speacial tape used for ducting it's like foil or how about thin piece of aluminum roof flash...radiorich — 12:19 AM
Zenith H725
Ed; One material that I have seen, but never tried for this was material for making exhaust gaskets, it's similar to ...Arran — 11:42 PM
Zenith H725
I just remembered, I have some hi temp silicone rubber material which could do the trick. Or a piece of FR4 laminate. Th...EdHolland — 08:39 PM
Zenith H725
The PSU filter cap arrived today (thank you USPS!) so I will work on that later. Meanwhile, I have the dial, speaker...EdHolland — 06:42 PM
Philco 610B oscillator wiring
Thanks Terry. After checking my notes I think I recorded about -10v at the 6A7 G4/control grid. The screen grid (G3 &...Tubester — 05:59 PM

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

>