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

Thread Closed

Low voltage and oscillation
#7

Thanks Chas
Sorry I didn't answer the questions in your first post but frustration took over and I walked away for a little while.  The transformer does not have any shorts.  I had the radio on for more than an hour while checking voltages and poking around and the tran. got a little over room temp.  Warm to the touch.
 There is no Candohm in this radio and I'm still not sure how to check if a cap or resistor is leaking to chassis.  Something I have still got to learn.
After checking voltages with my vtvm,( which is an Eico 232)it was a little higher but still below the specified voltage.  Recommended 180 v dc plate voltage and with the vtvm I got 156 v.  This difference was consistent thru the set.  I also have a Fluke with 1000ohm/volt.
 I obtained a 40-180 chassis which is similar to the 40-190. I checked my wiring and the installation of components to it and they all seem right.  The only thing changed in the -180 were the Ecaps and 2 wax caps.
  As far as checking the grounding everything is riveted as far as chassis grounds.  I went thru and tried to get a connection on all the ground rivets with a screwdriver while the set was on and got nothing.
  So my next test is to check my current consumption on the B circuit using your guidelines.
  My prowess is waning along with my confidence but I'll keep trying.

Thanks again
Dick


Messages In This Thread
Low voltage and oscillation - by madsowry - 03-11-2019, 07:01 PM
RE: Low voltage and oscillation - by morzh - 03-11-2019, 08:52 PM
RE: Low voltage and oscillation - by madsowry - 03-11-2019, 10:42 PM
RE: Low voltage and oscillation - by Chas - 03-12-2019, 11:58 AM
RE: Low voltage and oscillation - by madsowry - 03-12-2019, 05:26 PM
RE: Low voltage and oscillation - by Chas - 03-12-2019, 06:08 PM
RE: Low voltage and oscillation - by madsowry - 03-12-2019, 11:14 PM



Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
Plug Voltages Needed For A 1943 CRV-20130 Power Supply
That looks a lot like an aircraft connector of some kind, even if it's a U.S.N power supply. I have a book somewhere abo...Arran — 02:56 AM
Plug Voltages Needed For A 1943 CRV-20130 Power Supply
hello david, I have a similar generator in my collection that features a cast iron, single-cylinder Briggs & Stratt...radiorich — 01:00 AM
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

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

>