Philco 46-480 Electronic Restoration
Posts: 287
Threads: 16
Joined: Jan 2024
City: Tulsa
State, Province, Country: Oklahoma
I had time while eating lunch to measure the resistances of the output transformer windings. I measure 450 ohms on the 6V6GT/G side and 1.4 ohms on the speaker side.
This is much closer to what the Rider’s schematic indicates. They have 500 ohms to 1 ohm.
I’ve made the update on my schematic, but I won’t reload it (yet) just for that one little change. I’ll reupload after I finish dismantling the RF chassis to get to the obscured components buried within the wafer switch. I’ll note that so far I’ve found that most components are within 10-15% of their nominal values. Even the mica capacitors are within this range. The parts catalogs specify that most of these had a 5% tolerance, so I plan on replacement.
Joseph
Philco 46-480
Philco 49-906
Messages In This Thread
RE: Philco 46-480 Electronic Restoration - by jrblasde - 01-07-2025, 01:06 PM
Users browsing this thread:
|
Recent Posts
|
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 |
Philco model 38 code 121 not receiving signal.
|
Well why not! :lol:Stormlord5500 — 03:14 PM |
Philco model 38 code 121 not receiving signal.
|
Good luck next thing you know you will be winding coils just for the fun of it. DavidDavid — 11:29 AM |
Testing a speaker and output transformer Trutone A2-G
|
morzh
Short-circuited turns can be considered as a half-dead transformer.
But on this case transformer will hot and s...Vlad95 — 11:01 AM |
Testing a speaker and output transformer Trutone A2-G
|
I am not sure how a transformer could be weak. It could be inadequate, but only when you replace the original with somet...morzh — 09:56 AM |
Who's Online
|
There are currently 2143 online users. [Complete List] » 1 Member(s) | 2142 Guest(s)
|
|
|

|