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

Model 42-380 with push button tuning
#2

Hi

Good news indeed! Congratulations on getting your 42-380 up and running!

Are you saying that a preset AM station drifts when you use one of the preset buttons, or do they cut in and out?

If they are drifting, replace capacitors (5) and (9), 370 pF each, with new mica capacitors - do not use ceramics in this application unless they have an NP0 rating. Here, it is much better to spend the extra $ and get quality mica caps as replacements to prevent station drift. Most ceramics will drift as the radio warms up; you don't want that to happen. The originals are mica but are of open construction, coated only in wax, and are almost always bad by now. New dipped mica caps and NP0 ceramic caps will not allow the preset stations to drift.

If your preset stations are cutting out, the pushbutton mechanism is still dirty. These can be sometimes very difficult to get clean and to get working properly. I repaired one once, where the pushbuttons refused to work properly no matter how much I cleaned them, Replacement of the entire pushbutton assembly (no easy task!) was the only cure. Fortunately, the parts set used as a donor had a good pushbutton assembly...

--
Ron Ramirez
Ferdinand IN


Messages In This Thread
Model 42-380 with push button tuning - by Guest - 12-01-2009, 05:35 PM
Re: Model 42-380 with push button tuning - by Ron Ramirez - 12-02-2009, 09:37 AM
Re: Model 42-380 with push button tuning - by Guest - 12-02-2009, 12:37 PM



Users browsing this thread: 2 Guest(s)
[-]
Recent Posts
HiFi (Chifi) tube amp build - but my own design.
Tim, nice write up and thanks for sharing !! Sincerely Richardradiorich — 02:47 AM
HiFi (Chifi) tube amp build - but my own design.
Well, this was a real "Hum-Dinger" :lol: ! This will be kinda long, but hopefully it will help others having t...TV MAN — 01:55 AM
Shadow Meter Bulb
Phorum members, I am trying to find the bulb # for PHILCO Shadow Meter part number 45-2180 that is from a 37-640 chassis...georgetownjohn — 06:53 PM
Philco 41-608 changer coupler
3D-printing...short of machining, of course. Or molding.morzh — 05:20 PM
Philco 41-608 changer coupler
Thanks, Morzh. That solves the issue of the rubber pieces. Now, I need to find a way to replicate the pot metal piec...alangard — 05:07 PM
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

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

>