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

Thread Closed

No grid voltage in model 20
#2

Danny, Assume you're measuring with a scope, VTVM or DM with a high input resistance. Anything else will load the circuit so much, you won't see anything. Also assume coils do show some resistance. Any chance there's a little leakage across the variable caps or their parallel caps? Sometimes those 24's take a long time to warm up. If you touch the grid of the second RF, do you get noise? Good luck.


Messages In This Thread
No grid voltage in model 20 - by Danny - 10-01-2007, 09:15 PM
[No subject] - by rickd - 10-02-2007, 09:43 AM
[No subject] - by Danny - 10-02-2007, 11:23 AM
[No subject] - by rickd - 10-02-2007, 11:15 PM
[No subject] - by Danny - 10-14-2007, 02:15 PM
[No subject] - by rickd - 10-17-2007, 04:53 PM



Users browsing this thread: 2 Guest(s)
[-]
Recent Posts
under chassis parts locator diagram for 1938 Zenith 9s262
Has anyone gone to the trouble of creating an under chassis parts locator image?  Yes, I can identify components by foll...bobloney — 08:57 PM
Plug Voltages Needed For A 1943 CRV-20130 Power Supply
Try looking at this site the book mark is for a old generator that I was given. David    https://radionerds.com/index.ph...David — 08:36 PM
Plug Voltages Needed For A 1943 CRV-20130 Power Supply
Hello Everyone, I am looking for voltage identification for all the pin positions on the socket of a CRV-20130 power su...Tonym4704 — 08:16 PM
Philco P45-6365 Universal Transformer Instruction Manual
Can anyone guide me to where this may be found?GRG — 03:00 PM
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

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

>