Welcome Guest! Be sure you know and follow the Phorum Rules before posting. Thank you and Enjoy! (January 12) x

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

Philco 604C Electronic Restoration
#38

Well...not quite.

I found a 37-602 audio transformer in my stash o'stuff over the weekend.

I checked it out with the ohms function of my DMM and its specs were very close to original.

So I installed it.

No joy.

The volume is still low.

And the kicker...I disconnected the audio transformer and ran it through my signal tracer, using its audio transformer and speaker as before...and the audio is still low. Icon_thumbdown

I checked voltages again...they are now higher than what I posted before. Icon_crazy

I've made an executive decision. I am going to tear this thing apart, gut it to the bare chassis (save for the RF unit), and completely rebuild it. New wiring and all.

I did find the 1st IF secondary's resistance was near zero, by the way...I'll replace that transformer in the course of the complete, radical rebuild.

--
Ron Ramirez
Ferdinand IN


Messages In This Thread
RE: Philco 604C Electronic Restoration - by sam - 06-14-2015, 10:43 PM
RE: Philco 604C Electronic Restoration - by Arran - 06-17-2015, 12:54 AM
RE: Philco 604C Electronic Restoration - by Arran - 06-19-2015, 12:07 AM
RE: Philco 604C Electronic Restoration - by Ron Ramirez - 06-29-2015, 06:15 PM
RE: Philco 604C Electronic Restoration - by sam - 07-16-2015, 04:17 AM
RE: Philco 604C Electronic Restoration - by sam - 07-19-2015, 08:14 PM
RE: Philco 604C Electronic Restoration - by morzh - 10-25-2020, 08:12 PM



Users browsing this thread: 3 Guest(s)
[-]
Recent Posts
The list of my radio & TV collection!
Magical chords of forgotten melodies, old nostalgic music on an old radio... Saturday night blues on the Mid-Waves on an...RadioSvit — 12:20 PM
Philco 42-345 Restoration/Repair
Thank you MrFixr55 the issue with this radio is that the internal coil antenna is missing and there was a wire in its pl...osanders0311 — 11:34 AM
Philco 610B oscillator wiring
Regarding the oscillator circuit which is comprised of the 6A7's cathode, control grid, and screen grid. These elements ...Radioroslyn — 10:33 AM
Philco 42-345 Restoration/Repair
Hi OSanders, First off, welcome to the Philco Phorum where Phine Phamily-Phriendly Pholks Phull of Philco Phacts and P...MrFixr55 — 08:41 AM
Philco 42-345 Restoration/Repair
Today I've been reading through the site trying to learn more about this radio. I also soldered the lose power cord cabl...osanders0311 — 08:24 PM
Philco 610B oscillator wiring
Thanks David! I do have that same later prodution model 610 schematic. I've also studied the Philco service bulletins fo...Tubester — 08:12 PM
Philco 610B oscillator wiring
Some info from Beitmans says late production. David   David — 06:06 PM
Restoring Philco 96
Oh wow! Just found this thread.  Brings me back to early days on this phorum.  I did a 96 back in 2017.  Thread here: ...rfeenstra — 06:05 PM
Philco 610B oscillator wiring
Thanks for the replies. It's not the really the hum that I am after. Just trying to understand why only the shortwave ba...Tubester — 04:01 PM
Restoring Philco 96
70 and 90 are Superhets, but at least the 2x45 model of 90 uses the Plate detector (and so does 70). Also the Atwaters,...morzh — 03:28 PM

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

>