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

Did the 38-3 have an antenna?
#8

davemc Wrote:How does this radio perform? The reason I ask is there is a fairly nice one in an antique store (overpriced, of course - but LOCAL). I was curious what "magnetic tuning" was so I looked up the schematic (looks like it is just some sort of AFC, like in some high-end Zeniths).

But what was curious was that Philco would go to the trouble to implement AFC, and then use some sort of strange method of implementing push-pull audio by driving the grid of one push-pull tube from the screen of the other tube! How could that possibly work (well, at least). Surely adding a phase inverter tube would not cost that much. So I am curious as to how this radio sounds.

It was also not obvious in the antique store how this radio is tuned. There seemed to be some sort of crank arrancement.

Thanks

My radio performs pretty well after I replaced the caps and a weak tube. I have not attempted to align the magnetic tuning, and notice no difference with it on or off, except for the additional dial lights that come on. As for tuning, the "crank" is used for tuning the presets. The regular tining is via the vernier dial.


Messages In This Thread
Did the 38-3 have an antenna? - by Jon Scaptura - 05-20-2007, 06:58 PM
[No subject] - by Ron Ramirez - 05-20-2007, 11:08 PM
Re: Did the 38-3 have an antenna? - by n9vu - 05-23-2007, 06:32 AM
[No subject] - by 49Stude63 - 09-28-2007, 11:52 PM
[No subject] - by Jon Scaptura - 09-29-2007, 12:08 PM
[No subject] - by Texasrocker - 09-29-2007, 10:18 PM
[No subject] - by davemc - 10-19-2007, 03:23 PM
[No subject] - by Jon Scaptura - 10-19-2007, 06:35 PM



Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
PT 6 chassis screws size???
Hello bridKarl, that sounds right or maybe 8/32 . Sincerely Richardradiorich — 01:00 AM
PT 6 chassis screws size???
Have this done except for missing chassis screws. It looks like 1 inch 6/32 sheet metal screw may work but can anyone s...bridkarl — 10:32 PM
Philco model 38 code 121 not receiving signal.
Hello Stormlord, Well done on rewinding that coil it turned fairly good for your first one. Sincerely Richardradiorich — 09:12 PM
Philco model 38 code 121 not receiving signal.
Well here it is. It ain't pretty, but hopefully it'll work. I checked it with my DMM on continuity and it keeps and r...Stormlord5500 — 08:56 PM
Philco 42-345 Restoration/Repair
Yes, 57 is an electrolytic cap that should be 12 mfd 400 volts according to the parts list from the Phorum library schem...RodB — 06:01 PM
Philco 42-345 Restoration/Repair
Looks like if I am reading it correctly it looks like the silver capacitor#57 that appears to be a replacement is of a l...osanders0311 — 05:09 PM
Philco model 38 code 121 not receiving signal.
Thanks Arran. Yeah this plastic is pretty thin. It's a little thinner than the original stuff. It kinda reminds me of p...Stormlord5500 — 04:37 PM
Testing a speaker and output transformer Trutone A2-G
The equivalent of one short turn is basically the same as that of a shorted load. If it is the primary's turn, then the ...morzh — 03:53 PM
Testing a speaker and output transformer Trutone A2-G
I've never had an output transformer become shorted, the failure mode is usually an open primary, or in a center tapped ...Arran — 03:52 PM
Philco model 38 code 121 not receiving signal.
As long as the plastic sheeting isn't too thick, I think that the thickness of photographic film would be just about rig...Arran — 03:19 PM

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

>