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

Stuck on non-receiving Silvertone 4769
#9

Success! Icon_thumbup

Thank you so much Terry, Rod, and Brenda. You were right, Brenda, it had been a few years since I had to do the OSC test with a second radio and did it backwards.

I had previously tested resistors R4 and R5 (50K and 30K respectively). R4 read 52K and R5 read 33K so I left them in. But tonight before trying to inject a signal I decided to replace those two resistors, along with C7 (with a 100 pf) and C8 (with a 27 pf....I didn't have a 25 pf on hand). After replacing those 4 components I turned the set on and checked voltages. I now had the correct plate voltage on the 6J5 and pin 5 read -5.3 instead of nothing. So I slowly began tuning and....the stations came in as they should! I still need to do an alignment but already the set plays strong across the dial. I haven't checked the other bands yet but will do that tomorrow. I feel pretty confident they will receive as well.

Apparently one or both of the two mica's had gone south, thus losing the connection to the OSC coil.

Greg V.
West Bend, WI
Member WARCI.org


Messages In This Thread
RE: Stuck on non-receiving Silvertone 4769 - by NostalgiaRadioTime - 06-27-2021, 10:41 PM



Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
PT 6 chassis screws size???
Hello bridKarl, that sounds right or maybe 8/32 . Sincerely Richardradiorich — 01:00 AM
PT 6 chassis screws size???
Have this done except for missing chassis screws. It looks like 1 inch 6/32 sheet metal screw may work but can anyone s...bridkarl — 10:32 PM
Philco model 38 code 121 not receiving signal.
Hello Stormlord, Well done on rewinding that coil it turned fairly good for your first one. Sincerely Richardradiorich — 09:12 PM
Philco model 38 code 121 not receiving signal.
Well here it is. It ain't pretty, but hopefully it'll work. I checked it with my DMM on continuity and it keeps and r...Stormlord5500 — 08:56 PM
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

[-]
Who's Online
There are currently 741 online users. [Complete List]
» 1 Member(s) | 740 Guest(s)
Avatar

>