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

No signal through Philco 45
#1

I've just finished replacing all the caps ( leaky Micamolds included) and resistors in a Philco 45, and no radio stations are coming in. I checked all the coils, and I "think" they are ok, all tubes check ok except for one of the 39/44 tubes which read a little low on a couple tube testers I have. I checked the voltages tonight against the Rider data, and get the following readings. What do you folks think? Bad coil somewhere?
6A7: P to K: 271 volts, should be 260
SG to K: G1: 3.23 v, should be 35
G2 : 293v, should be 135
G3 & 5: .220, should be 85
K to F: .228, should be 4.2
39/44 (1st IF): P to K: 270, should be 255
SG to K: 0, should be 75
K to F: .046, should be 3.8
39/44 (2nd IF): P to K: 268, should be 255
SG to K: .046, should be 75
K to F: .046, should be 3.8
The readings for the 80, 42, & 75 all check ok against the Rider's chart. I think the IF transformers are ok. The antenna coil, and oscillator coil, I'm not too confident about after noticing these readings, but both of those coils check ok for continuity, IF, and I say, IF I checked them correctly.I figure that's the problem, though. I hooked a sig. gen. to see if I could get a 460 kc., and 1400 kc. signal through, and nothing.I hooked the sig.gen. to both the antenna clip, and the grid cap of the 6A7. Any thoughts? Thanks!! Ed M.


Messages In This Thread
No signal through Philco 45 - by don'tdomelikethat - 11-01-2005, 10:05 PM
[No subject] - by Ron Ramirez - 11-02-2005, 01:07 PM
[No subject] - by don'tdomelikethat - 11-02-2005, 04:50 PM
[No subject] - by Ron Ramirez - 11-02-2005, 07:08 PM



Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
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
Philco model 38 code 121 not receiving signal.
Good news everyone! I think I have found everything I need for rewinding the antenna coil primary. I found some pla...Stormlord5500 — 09:40 AM
Philco Battery-WWII vintage
My younger sister went to SUNY Plattsburg NY, (BS, MS, RN) in the late 1970sabout 10 min from the Northern NY / Canada b...MrFixr55 — 07:59 AM
Philco Battery-WWII vintage
Hello Bob, What Amazing find! Sincerely Richardradiorich — 10:19 PM
Testing a speaker and output transformer Trutone A2-G
Hi Murf, Do this: Monitor between ground and one plate of the rectifier while playing the radio.  Do the same with ...MrFixr55 — 09:51 PM
Philco Battery-WWII vintage
Mike; I take it that Soviet cars did not come equipped with block heaters, hence the hot oil change? Where I lived in...Arran — 08:42 PM
Philco 42-345 Restoration/Repair
The more the better. (Within reasonable limits.) 2-5 times more is no problem in this case.Vlad95 — 03:50 PM
Philco 42-345 Restoration/Repair
Thanks, RodB and Vlad95, I was mainly trying to figure out this capacitor to locate a replacement, Vlad thank you for...osanders0311 — 03:44 PM

[-]
Who's Online
There are currently 921 online users. [Complete List]
» 2 Member(s) | 919 Guest(s)
AvatarAvatar

>