Welcome Guest! Be sure you know and follow the Phorum Rules before posting. Thank you and Enjoy! (January 12) x

Thread Closed
Thread Rating:
  • 1 Vote(s) - 5 Average
  • 1
  • 2
  • 3
  • 4
  • 5

Philco model 70 rebuild - by Tim P.
#14

The adventure has begun. The parts have arrived and I have started the recap part of the rebuild. So far, I have rebuilt the line filter (47) and (34) of the bakelites. morzh's trick of using a heat gun to warm and push the guts out with a small allen wrench works good. I got the new caps in and those bakelites back in. I checked the resistors around the #34 bakelite. The #32 & 35 resistors show they should be 250k. They both check about 400k (.39 & .41 meg on my meter), and the #35 to the speaker plug checks about 55k. Neither look like they have been hot, but looks like the value is off quite a bit. Seems I read somewhere these old resistors creep up in value. What do you all think? Replace these? If so, I dont know if this type of resistor is still made, or if I will have to use modern replacements.

Another note, I ordered the yellow tubular caps from AES, which so far, fit into the bakelite blocks, but the larger ones for those metal cans under the chassis are too large around to fit, so I need some flat poly caps. I have some, but they are only rated at 250v, which I feel is marginal. This might save someone else from making the same mistake I did.

If I could find the place called "Somewhere", I could find "Anything" Icon_confused

Tim

Jesus cried out and said, "Whoever believes in me , believes not in me but in him who sent me" John 12:44


Messages In This Thread
Philco model 70 rebuild - by Tim P. - by TV MAN - 01-29-2014, 11:46 AM
RE: Philco model 70 rebuild - by Tim P. - by TV MAN - 02-08-2014, 03:25 PM



Users browsing this thread: 28 Guest(s)
[-]
Recent Posts
6TPZ and 5TPO Radio Help
Thanks, will do.R3Sons — 01:25 PM
1930s Stewart-Warner Tombstone Radio need help identifying model number
UPDATE: I was able to pick up a signal generator on the cheap (amazingly enough) on feebay and I did an IF alignment fol...captainclock1988 — 09:53 AM
Philco 91 Schematic
Hi Rod, The resistor connects to pin 4 and the ungrounded side of block 9. From pin 9 of the RF tube to one side of ...dconant — 09:34 AM
Just got a 49-1613 need to know...everything!
I just found your post. I have this exact same model, and have had it since 1985 when I was 15 years old! I performed a ...MuzzcoVW — 09:11 AM
B&K 1077B no video
Hello Tim, I would if it's a leaky Capacitor So are all 3 of those B- voltages low then ? Sincerely Richardradiorich — 01:55 AM
B&K 1077B no video
I found a schematic and think I have the problem traced down to the minus power supply. I have very low voltages that go...TV MAN — 12:41 AM
RCA 15X
I'd try replacing the bulb first and if that doesn't do it, then change the 35Z5 and see if the problem goes away.NostalgiaRadioTime — 12:28 AM
B&K 1077B no video
Hello Tim, I have that exact unit in my shop too plus a Sencore unit there are times I like one or other !!. Sincerely...radiorich — 11:07 PM
RCA 15X
Everthing goes at once, maybe it's the cold weather, I have had 2 dial strings break and no my little RCA is having dial...Paul Philco322 — 10:26 PM
Philco 91 Schematic
Hi Dan, I can't explain this specific resistor but I have seen the use of a switch to apply B+ voltage to screen gri...RodB — 09:36 PM

[-]
Who's Online
There are currently 10350 online users. [Complete List]
» 1 Member(s) | 10349 Guest(s)
Avatar

>