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 model 43
#1

I just aquired a model 43 and I see that there seems to be two IF`s. One is listed as 450kc and the Philco literature says 460kc. I am not at the point of a IF alignment yet but was wondering which one to use.
#2

Hi

The original Philco service bulletin for Model 43 specifies 450 kc, and a supplement with alignment information for the 43 also specifies 450 kc.

What Philco literature are you referring to that specifies 460 kc? Just curious.

--
Ron Ramirez
Ferdinand IN
#3

Hope you figure it out, but in all honesty it probably wouldn't make a difference. As long as everything was peaked in approximately the same range, you schold be good to go. Didn't have no accurate frequency counters in the average shop way back when.
#4

My Philco service bulletin archive also lists 450KC as the IF frequency for the Model 43.

Maybe a typo in a Rider's or Beitman?

Chuck
#5

The Rider's info in Volume III, Philco pages 3-13 and 3-16, also specifies 450 kc.

--
Ron Ramirez
Ferdinand IN
#6

Actually it does make a difference peaking the IFs at the wrong frequency, I had a set I repaired about two years ago, also a Philco, that had the wrong IF frequency listed on the data sheet it said 460 KC however the IF cans themselves said 455 KC on the side. I tried it one way at 460 KC and then the other at 455 KC and it made a huge difference in performance, it was 455 KC as it turned out.
Regards
Arran
#7

Ron, The literature I was refering to was Philco-Essential Service Data on All Models that lists the IF for model 43 as 460kc. Also the book "Complete Instructions for Adjusting All Philco Receivers" lists the IF as 460kc on page 23. This radio also has a type 44 in the 1st detector and Riders 3-14 says that the 44 is replaced with a type 36 but it doesn`t state that the 1st detector should be changed to a type 36. The power Xformer is a replacement that only puts out 450v plate to plate-about 216 volts at the 1st filter cap [prt. no. 72 ]but I have left it in until all of the repair work it needs is done. I plan to replace it before alignment and that lead to my question about the IF difference as the voltages will be higher when the new Xformer is installed. Thanks, Mike.
#8

Well,I got back to this set and I replaced the power xformer so the plate voltages are close to where they should be{245v vrs 160v}. I hooked up the signal gen. and set it on 450kc and got nothing. I changed it to 460kc and got plenty of signal. I stopped there because the instructions were a bit odd. They want to set the oscillator to 175kc and I think they want you to leave it there when you align the set at 700kc and 1400kc{ the 4th and 8th harmonics}. Why not change the oscillator to 700kc and adjust the 700kc variable cap. for 700kc and do the 1400kc {on both bands} the same way? Thanks,Mike.




Users browsing this thread:
[-]
Recent Posts
Refinishing Ideas
Hi Poulsbobl, I think that you could get away with it.  In the Philco Library, there is a parts listand specs for sp...MrFixr55 — 11:54 PM
Philco 46-480 Electronic Restoration
The sleeving for the transformer arrived early, so I went ahead and finished reassembling. The chassis looks far better ...jrblasde — 10:15 PM
Philco 610B oscillator wiring
I don't know what you are referring to when you say "tube cathode ground". Ground is a connection to the chass...RodB — 05:56 PM
Zenith H725
Good points, Arran. I haven't encountered this problem with any other radio (all earlier vintages), so am learning here....EdHolland — 05:32 PM
Zenith H725
Ed; One thing that I will say about these is that Brand Z was considerate enough to make these mica caps easily acces...Arran — 02:34 PM
Philco 610B oscillator wiring
Do you know what run # your chassis is? It took me a while to find what you were basing updates/modification on as I did...Radioroslyn — 07:34 AM
Need to purchase some accessories for restoration of my Old Philco Radio
COLLEAGUES, Thank you all for such good and important suggestions as how to find good replacement parts. I will go fo...palonso — 07:05 AM
Zenith H725
Here's what the inside of AM IFT2 looked like, and the other pic shows the discs I made to take place of the mica and ke...EdHolland — 07:40 PM
Zenith H725
IF2 will need replacement caps. The arcing was severe enough that the mica is pitted and holed where the HT flashed over...EdHolland — 04:04 PM
My Philco 37-116 Restore
Measuring from center tap like the tube voltages show. Cap 127 is isolated from ground. Cap 127 shown in upper left of p...dconant — 08:05 AM

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

>