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

Philco 52 - difficulty tuning
#7

If you are measuring anywhere near 30K across a coil then it is most likely open. You should be reading less than 100 ohms across any of the RF  coils, and around 10 ohms across the oscillator coil.

It still seems your oscillator is not working. The 24A performs both the functions of the mixer and oscillator. It can still be passing the 175 kHz IF signal but not oscillating. If you can hear the 175 kHz IF freq at the 24A grid, then everything is good after the mixer, but you have no oscillator to mix the received signal with to produce the IF freq.  

What you are probably hearing is the feedthrough of the 175 kHz IF freq into the mixer grid if you hear the same signal regardless of the position of the tuning dial.


Messages In This Thread
Philco 52 - difficulty tuning - by winston763 - 03-22-2016, 06:13 PM
RE: Philco 52 - difficulty tuning - by winston763 - 03-23-2016, 12:08 AM
RE: Philco 52 - difficulty tuning - by winston763 - 03-23-2016, 12:15 AM
RE: Philco 52 - difficulty tuning - by winston763 - 03-25-2016, 12:48 AM
RE: Philco 52 - difficulty tuning - by Mondial - 03-25-2016, 08:40 AM
RE: Philco 52 - difficulty tuning - by winston763 - 03-25-2016, 11:43 PM
RE: Philco 52 - difficulty tuning - by winston763 - 03-26-2016, 04:15 PM
RE: Philco 52 - difficulty tuning - by winston763 - 03-26-2016, 11:59 PM
RE: Philco 52 - difficulty tuning - by winston763 - 03-28-2016, 01:02 AM



Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
HiFi (Chifi) tube amp build - but my own design.
Well, maybe - maybe not  :lol: It's been an interesting project so far! Something so simple, yet so cranky. The 1st one ...TV MAN — 05:12 PM
1949 Motorola 5A9M
Haven't thought of Burgess batteres in a while  https://www.radionostalgia.ca/lib/Images/battery/us/burgess1D.jpgi ...Vlad95 — 03:50 PM
Philco Model 16 wiring question
Measure the voltages first, just in case.morzh — 02:19 PM
1949 Motorola 5A9M
Haven't thought of Burgess batteries in a while Mr. Fixer. Boston Edison always used Burgess in their Bright Star yellow...Paul Philco322 — 02:17 PM
1949 Motorola 5A9M
Thanks Sam. I'll let you know. I can probably scare some up from the local radio club.klondike98 — 02:07 PM
Philco 89 Code 123 Osc Coil
Hello,  I thought I would post my findings on my bad oscillator tickler coil. There were 27 turns on the outer coil b...dconant — 12:38 PM
Philco Model 16 wiring question
Thanks Morzh. So it appears I did wire it incorrectly and I have to switch the wires between pins 2 and 4.bobclausen — 09:24 AM
Philco 46-1209 strange behavior
No, it's not a problem, just during certain condition it could show up. Yes, an internal tube short could do that too. ...morzh — 09:13 AM
HiFi (Chifi) tube amp build - but my own design.
You sound guys are never satisfied. :crazy: :clap:RodB — 09:10 AM
HiFi (Chifi) tube amp build - but my own design.
I got some new ceramic octal tube sockets installed and also tried some different coupling caps.  The results:  The go...TV MAN — 08:42 AM

[-]
Who's Online
There are currently no members online.

>