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

Adjusting the Antenna Trimmer
#1

Hi All,

I'm closing in on my first success. I took a dead 42-PT94, recapped it, swapped out the resistors, fixed up some of the crumbling rubber insulated wiring, and it's playing quite well. Pretty exciting.

In aligning it, I get no reaction from the antenna trimmer. The IF's and the oscillator trimmers act just as they should, but no output variance from the antenna trimmer. What don't I understand? (I'll admit that's a whole lot at this stage of my education).

Alan
#2

Well a few things come to mind. The trimmer on the tuning cap should be set for max volume at the HIGH end of the bc band. It won't have much of an effect at the low end of the dial. Does it have the original loop ant? Any damage? Shorted turns? If not the replacement may not have the proper amount of inductance.
Terry

When my pals were reading comic books
I was down in the basement in my dad's
workshop. Perusing his Sam's Photofoacts
Vol 1-50 admiring the old set and trying to
figure out what all those squiggly meant.
Circa 1966
Now I think I've got!

Terry




Users browsing this thread: 2 Guest(s)
[-]
Recent Posts
Philco model 60
Yes I was there. I got some real bargains there. Plus a Zenith 7G605 clipper that I have been trying to find for a fair ...Radios1340 — 01:46 PM
The speaker table error?
G  10-1/2"       65, 76, 87, 95 Push-Pull 45's 2766 0.7 550 3200 H   10-1/2"    77, 96 Push-Pull...morzh — 09:26 PM
A Marconi model 86
I have a Stromberg, one of the early ones, seems early 30s. This is what I call a back breaker. None of the early Philc...morzh — 08:28 PM
A Marconi model 86
A backbreaker.....PaulPaul Philco322 — 08:12 PM
A Marconi model 86
>>What a behemoth! A Juggernaut.morzh — 07:47 PM
Philco 70 antenna lead
I am not sure I understood about the coils and the mush. I looked an more than one coil in 20, 70, 90, 60, Zeniths and ...morzh — 07:46 PM
A Marconi model 86
:e_biggrin: What a behemoth!  I hope the final result is as much a quality sounding example!  Keep us posted on your pro...GarySP — 07:32 PM
A Marconi model 86
I should add that the double conversion may only be used on the shortwave bands, but I haven't looked at the schematic t...Arran — 07:27 PM
Philco 70 antenna lead
Yes, that wire will not pick up much interference as routed - the RF at that level won't be affected, and if you have st...radio1 — 07:26 PM
Philco model 60
I'm also a member of MARC. Did you attend the Vintage Electronics Expo in Waterford, MI last month? That's where I got...GarySP — 07:22 PM

[-]
Who's Online
There are currently 6902 online users. [Complete List]
» 1 Member(s) | 6901 Guest(s)
Avatar

>