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

Zenith IF adjustment strangeness
#4

Guys, I'm measuring AVC voltage off the eye tube. Can't recall the pin. Anyhow, I just got done checking my work. Sure as heck, if you peak IF adjustment "B" to it's lowest negative voltage setting, it's peaked! I know this sounds stupid, but that's what's happening. The other three, peak high(negative) as they should. Like I said. I can peak adjustments A C and D. then peak "B" on a station, and I get the same result. B is at it's lowest voltage(negative). Now, I'm injecting the signal at the IF amp. I'm not coupling in, just getting the sig gen lead next to it. Enough to pick up the signal. Strange, it's gotta be me. Ed, how are you injecting your IF signal?

-Brian
If you collect or are interested in antique telephones, please visit Classic Rotary Phones
http://www.classicrotaryphones.com/forum/index.php


Messages In This Thread
Zenith IF adjustment strangeness - by BDM - 07-26-2008, 01:52 AM
[No subject] - by exray - 07-26-2008, 06:16 AM
[No subject] - by etech - 07-26-2008, 10:01 AM
[No subject] - by BDM - 07-26-2008, 08:40 PM
[No subject] - by etech - 07-26-2008, 09:46 PM
[No subject] - by BDM - 07-27-2008, 12:22 AM
RE: Zenith IF adjustment strangeness - by BDM - 07-27-2008, 02:27 AM
[No subject] - by Texasrocker - 07-27-2008, 02:35 AM
[No subject] - by etech - 07-27-2008, 09:02 PM
[No subject] - by BDM - 07-27-2008, 09:10 PM
[No subject] - by Doug Houston - 08-09-2008, 10:01 PM



Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
My collection presentation
There is an article on my site that introduces the first portable radios in my collection. I have only provided a link t...Vlad95 — 01:17 PM
Electrolytic restuffing/internals
Bridkarl This specific cap you have is the easiset type to restuff. I usually cut it at the upper border of the depr...morzh — 11:35 AM
philco predicta
Hi CGL18, First off, welcome to the Philco Phorum. I have not worked on a TV for a while but here are some givens: ...MrFixr55 — 08:22 AM
Another amp build - here I go again!
Sweet! I actually have a Dynaco Mark 4 that I had been running with 6L6s with no mods. Seemed to my 14-year-old head a...MrFixr55 — 12:57 AM
PT-6 finished!!
Hi Gang, Tube heaters are not "Ohmic" devices (that maintain specified resistance over wide temperature, c...MrFixr55 — 12:03 AM
Electrolytic restuffing/internals
Look here: Philco-F676-124 Vlad95 — 08:02 PM
PT-6 finished!!
Well the 35Z3 doesn't have a tap on the tube heater for a pilot light, so in this set they have the dial lamp paralleled...Arran — 06:21 PM
Electrolytic restuffing/internals
Thanks. I think I try to cut this as suggested. I don’t have a lathe, but I do have a tap and die set. I am going to see...bridkarl — 04:46 PM
Another amp build - here I go again!
Hey all! Well, I guess that with what I learned from my last build, it's time to move up the ladder another rung and tak...TV MAN — 04:38 PM
Electrolytic restuffing/internals
There are various ways to handle this, one is to cut near just above that rolled in area is near the bottom, using the r...Arran — 04:36 PM

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

>