46-480 FM test socket?

Register

Guest Join Us

Hello Guest,

Please feel free to join us!
There are many more parts of the Phorum that only members can see.

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

Thread Rating:

0 Vote(s) - 0 Average
1
2
3
4
5

Linear Mode

46-480 FM test socket?

DuMont
Junior Member

Posts: 40
Threads: 10
Joined: Nov 2018
City: Dallas State, Province, Country: Texas

#1

04-22-2019, 02:51 PM

I've finished the electronic restoration of the Philco 46-480 and while AM plays well, FM volume is very low even with volume turned to high. The 7F8 tube is good, and I discovered a 4.7 uf instead of a 5 mf electrolytic in the 2nd IF stage. Going to put the correct value in there, but what's really got me interested is a jack on the back of the chassis that says "FM Test Socket" and looks about the size of an iPod headphone jack. I can find NO REFERENCE to this in the Philco service manual, Riders, or Sams. Any idea what this is and what it's supposed to do?

Find

« Next Oldest | Next Newest »

Messages In This Thread

46-480 FM test socket? - by DuMont - 04-22-2019, 02:51 PM

RE: 46-480 FM test socket? - by morzh - 04-22-2019, 04:33 PM

RE: 46-480 FM test socket? - by DuMont - 04-24-2019, 06:51 PM

RE: 46-480 FM test socket? - by Jake Blake - 04-24-2019, 08:48 PM

View a Printable Version

Users browsing this thread: 1 Guest(s)

Recent Posts
Philco Model 16 wiring question
Thanks Morzh Yes I recapped everything and replaced almost all the resistors as well. I redid #99 with .015 safety ca...bobclausen — 07:11 PM
Philco Model 16 wiring question
Well...pull out every single load of the transformer. For every winding. Unsolder if needed. Then re-do your dim bulb....morzh — 07:02 PM
Rogers Majestic R-646
Kinda weird to see both open, but once you get it up and running, really pay attention to your sound. Listen for loud cr...TV MAN — 06:59 PM
Rogers Majestic R-646
Vlad; I was just reminded of something else, I'm not sure why but many Rogers built sets do seem to have open primari...Arran — 04:40 PM
Rogers Majestic R-646
Thanks RpdB I don't think there's much difference with interstage transformers of different models other than dimersion...Vlad95 — 03:27 PM
Rogers Majestic R-646
Vlad; I looks like your set has the same problem that mine did, both a bad output transformer, and a bad audio inters...Arran — 03:21 PM
Rogers Majestic R-646
Ouch! Not often the secondary takes a hit. Wish there was a better solution. I have a good interstage transformer but it...RodB — 02:59 PM
Rogers Majestic R-646
By the way, the bypass you suggested is a rare solution in some circuits. For example, this schematics solution is used...Vlad95 — 01:43 PM
Rogers Majestic R-646
No, you are wrong, because you did not know the details. Unfortunately, only ONE winding out of six is intact in both t...Vlad95 — 01:14 PM
Rogers Majestic R-646
The output 45s are still in push-pull because the transformer secondary winding is still in the grid circuit providing o...RodB — 11:52 AM

Who's Online

There are currently 1299 online users. [Complete List]
» 1 Member(s) | 1298 Guest(s)