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

Model 41-296 LO problem - BC band
#3

It seems that there may be some issue with the bandswitch sections related to the local oscillator. When in the pushbutton tuning position the variable tuning cap is isolated from the circuit and replaced with a fixed value cap. Perhaps there is oxidation on the switch contacts (section A8 ) which connect the variable cap to the oscillator coil?

There is an awful lot of switching going on in that osc circuit and any bad contacts may cause loss of tuning range.


Messages In This Thread
Model 41-296 LO problem - BC band - by w5ami - 04-15-2013, 06:45 PM
RE: Model 41-296 LO problem - BC band - by Mondial - 04-15-2013, 08:39 PM
RE: Model 41-296 LO problem - BC band - by w5ami - 04-15-2013, 08:54 PM
RE: Model 41-296 LO problem - BC band - by w5ami - 04-16-2013, 10:54 AM
RE: Model 41-296 LO problem - BC band - by w5ami - 04-16-2013, 10:16 PM



Users browsing this thread: 2 Guest(s)
[-]
Recent Posts
An attempt to remove the Field Coil from a G speaker
Gary I in fact did, on a 38-14, I think, where I had a speaker with the dead coil. Well...it kinda worked. Kinda, be...morzh — 10:38 PM
An attempt to remove the Field Coil from a G speaker
Mike, what ever happened to that plan you had to try using a rare earth magnet to magnetize the pole? This looks like a...GarySP — 10:25 PM
RCA T62 is playing.....
Beautiful set.morzh — 09:07 PM
An attempt to remove the Field Coil from a G speaker
Well....here it is. The green stuff. Unfortunately, probably penetrates deep. I opened the top layer and saw that: ...morzh — 08:58 PM
Philco 91 Restore Code ??
:clap: :clap: :clap: :clap: Really nice workmanship!!! Top of the chassis looks great. Sorry about the long winded e...MrFixr55 — 08:09 PM
Philco 40-120C Restoration
Thank you for your reply. I will check voltages on the other tubes, look at resistor 23 and cap 25, etc. If all else fai...bluecap — 07:58 PM
RCA T62 is playing.....
Nice looking set great save. DavidDavid — 07:48 PM
Philco 89 indicator light.
Hello Jim, I have done several 89s. The trick is to move the drum in or out on it's shaft. You will need to loosen a set...dconant — 07:36 PM
An attempt to remove the Field Coil from a G speaker
MrFixr Yes, it is my plan to go with 45rpm spider if I go that far. No, the pole was not left-handed as I unscrewed ...morzh — 07:14 PM
Philco 40-120C Restoration
Change the tube. Check the tube's bias network. Are any other tubes experience the drop or just this?` Is resistor 23 OK...morzh — 07:09 PM

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

>