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

if can on model 42-1003 code 121
#2

(01-19-2015, 01:12 PM)mountain man Wrote:  confused on schematic, the if can before the 7c6 has 5 wires in it grn,blue,black,red and white. the black wire is center tapped in the secondary side of the transformer but nowhere on the schematic. at present i have connected it to pin 4 on the 7c6 but i do not think this is right. getting 455khz tone all the way to the primary side of the transformer but no further. the 50l6 is not producing anything thru a speaker but i can get something when using signal tracer.any ideas?

There are three additional components inside this I.F. as shown on the schemo. 45A,C & D I believe. Anyways they are two 100pfd caps and a 47K resistor as shown below the 7C6 tube on the schematic. The black wire has to connect the two 100 pfd caps to the 7C6 cathode pin 7. Good luck.  Icon_thumbup John


Messages In This Thread
RE: if can on model 42-1003 code 121 - by John R - 01-19-2015, 03:55 PM
RE: if can on model 42-1003 code 121 - by John R - 01-20-2015, 02:46 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 no members online.

>