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

zenith 7s330 alignment
#1

Alignment instructions for the set are laconic to say the least. For the IF -connect osc. to converter grid, 455K.C.,
dummy ant. .5 uF. What does it mean? Do I just inject 455 K.C. from my sig. generator to the converter grid via
.5 uF cap? Same with a "set to scale" procedure - 18 M.C., dummy ant. 400 ohms. Is it their terminology or I just got spoiled by the nice Philco detailed instructions i.e. "connect signal generator to the grid of tube such and such via 200pf capacitor etc, etc... Thanks.
P.S. It is 7S530.




http://www.nostalgiaair.org/PagesByModel...025333.pdf
#2

Well, .5 is a little large for a coupling capacitor, sure you don't mean .05 mfd? Should work anyway. Since this is a transformer set, you don't have to sweat the ground connection. Dummy antennas? Well for regular AM sets with their own loops, about 30 turns of whatever on an empty TP cardboard works to couple generator to radio without direct connection works for me, but for 18 MC, dunno.




Users browsing this thread: 1 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.

>