Thread Rating:
  • 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5

First attempt at rewinding an oscillator coil (Phil 38-12)
#11

Art Hoch Wrote:Is it time to start adjusting the i.f.s????? Being a first-timer on this thing, I don't quite know what to expect.

Thanks for your help.

No, no, no. Ok, Art. You got it working . That's the first step. DO NOT go messing with the IFs, puleeze! because all of this advice will turn to mush. They have nothing to do with this repair. I know you from many years of posts so I know you must have some savvy.

You can do this by ear if you work at it Icon_smile The "second radio trick" is a technique to find the local oscillator frequency. You should find about 455kc difference between your dial setting and what you hear on the second radio. if you're 100kc off then maybe you'll hear some strong local stations on the wrong part of the dial but at least you have something to work with. 7estaf says the right thing if you are too high or too low. Might have to add/subtract a few turns to get the coil into the infield instead of the ballpark.

Modern frequency counters, an AADE L/C meter or even an old timey Grid Dip Oscillator make a relative breeze out of these issues!

Get that local oscillator coil tuned within 5 or 10 kcs as heard on the second radio then you'll be in like Flynn.


Messages In This Thread
Re: First attempt at rewinding an oscillator coil (Phil 38-1 - by exray - 05-10-2011, 08:55 PM



Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
New Philco Repair Bench
Morzh is correct. The repair bench on our website is an archived image of chuck’s original site. He no longer provides s...klondike98 — 05:32 PM
Made mistake & did not label connection
Excellent information. It is all starting to come together now and your explanation really helped since I noticed that ...georgetownjohn — 04:39 PM
Made mistake & did not label connection
Hi John, I don't have this radio, but I can supply some info: Based on your pic, pins 7,8 and 1 are used together, go...MrFixr55 — 02:02 PM
New Philco Repair Bench
As far as I know, the Repairbench does not work, and has not been working in a while. Chuck (we had that campaign looki...morzh — 01:33 PM
Radio city products 664 schematic request
Need a schematic or manual for the 664. The 663 may be similar.daveone23 — 12:38 PM
New Philco Repair Bench
Thanks Gary.dconant — 12:16 PM
New Philco Repair Bench
I tried accessing the site through our library and got the same response. It's reported to our tech gurus. GaryGarySP — 11:50 AM
New Philco Repair Bench
I am sure this is the archive, and not the Chuck's site.morzh — 09:50 PM
Made mistake & did not label connection
It's not like we are good friends with that wire and can tell it from other ptetty identical looking wires. Why'n't you...morzh — 09:49 PM
Made mistake & did not label connection
I'm not sure why that wire wasn't covered in the video. I'm pretty sure the 6A8 won't work until that pin is grounded. Y...RodB — 09:47 PM

[-]
Who's Online
There are currently 4717 online users. [Complete List]
» 2 Member(s) | 4715 Guest(s)
AvatarAvatar

>