Welcome Guest! Be sure you know and follow the Phorum Rules before posting. Thank you and Enjoy! (January 12, 2025) x

Thread Closed

Philco 40-180 no tuneing
#10

I’m at whits end can’t understand why this simple circuit won’t oscillate I’ve substituted all caps including tuneing cap & grid leak resistor checked coil resistance and connections, i can make it osc but with almost no tuneing by increasing cap 19a by 150mmf can even disconnect tuneing cap same result. Switches all working normal.removed wax from osc coil checked windings I can’t think of anything else to check. Anyone have any ideas? Push buttons working normal.    
Forrest


Attached Files Image(s)
   


Messages In This Thread
Philco 40-180 no tuneing - by Forrest - 11-13-2021, 08:59 PM
RE: Philco 40-180 no tuneing - by morzh - 11-13-2021, 09:53 PM
RE: Philco 40-180 no tuneing - by Forrest - 11-14-2021, 08:43 AM
RE: Philco 40-180 no tuneing - by mikethedruid - 11-14-2021, 09:41 AM
RE: Philco 40-180 no tuneing - by RodB - 11-14-2021, 10:32 AM
RE: Philco 40-180 no tuneing - by morzh - 11-14-2021, 03:15 PM
RE: Philco 40-180 no tuneing - by morzh - 11-14-2021, 05:00 PM
RE: Philco 40-180 no tuneing - by admin - 11-18-2021, 01:48 PM
RE: Philco 40-180 no tuneing - by tludka - 11-28-2021, 01:54 PM
40-180 no manual tuneing - by Forrest - 11-18-2021, 01:00 PM



Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
54C Complete Teardown/Rebuild
I don't think that I have encountered a 12Z3 before, curious how it uses one of those but includes a #43, which is a 25 ...Arran — 02:17 PM
HiFi (Chifi) tube amp build - but my own design.
It's the other forum. I'm also in DIY, but mostly read there. Honestly, I kinda jumped into this without much thought to...TV MAN — 10:43 AM
Philco 71 Code 125
Hello,  I am in need of a schematic for this radio. Mine has the three separate circular tube shields and a shadow me...dconant — 08:06 AM
Stromberg Carlson 1500 Squeal
And life just keeps getting more complicated.dconant — 07:57 AM
54C Complete Teardown/Rebuild
Hello Roy, here is this one sincerely Richardradiorich — 12:45 AM
54C Complete Teardown/Rebuild
Richard, Had grabbed it already but thank you just the same.  I find myself wanting to find some way to block out the...glyphmon — 12:03 AM
54C Complete Teardown/Rebuild
Hello roy, here is a link to the schematic . Sincerely Richardradiorich — 11:54 PM
54C Complete Teardown/Rebuild
Richard, The Silvertone 2014 also is a transformerless set, so I am incorporating a 1:1 600 ohm audio isolation transfo...glyphmon — 11:37 PM
Preliminary work on wife's Silvertone 2014
Did an alignment today which was interesting.  IF alignment went great, almost all was already spot-on.  Adjusting on th...glyphmon — 11:35 PM
54C Complete Teardown/Rebuild
The main problem with adding a Bluetooth input is that this set lacks a traditional power transformer to isolate it from...radiorich — 11:19 PM

[-]
Who's Online
There are currently 1767 online users. [Complete List]
» 2 Member(s) | 1765 Guest(s)
AvatarAvatar

>