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

Philco model 20 BC resistor
#2

Just remember, you're running the radio with today's 120-125 VAC and the set was designed for 110-115 VAC back in the day.

The power transformer will be pumping out a higher secondary voltage.
Not real good for the longevity of the power transformer in the long run.

Use a buck/boost transformer to lower your AC voltage or a variac and see what the effects are. The BC resistor should get relativelt hot, since it's a wirewound type, but not 'boiling' hot. Your higher AC mains voltage may be a contributor.

Chuck


Messages In This Thread
Philco model 20 BC resistor - by 7estatdef - 03-02-2011, 06:21 PM
Re: Philco model 20 BC resistor - by Chuck Schwark - 03-02-2011, 06:36 PM
Re: Philco model 20 BC resistor - by 7estatdef - 03-02-2011, 07:05 PM
Re: Philco model 20 BC resistor - by 7estatdef - 03-02-2011, 09:36 PM
Re: Philco model 20 BC resistor - by Ron Ramirez - 03-03-2011, 09:03 AM



Users browsing this thread: 1 Guest(s)
[-]
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 2312 online users. [Complete List]
» 3 Member(s) | 2309 Guest(s)
AvatarAvatarAvatar

>