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EICO 235 VTVM
Bradley Rush
RadioMonkey
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Posts: 220
Threads: 56
Joined: Oct 2011
City: Lompoc CA
#1

12-23-2016, 12:35 PM
Just have some time to repair. I almost gave up could not find the schematic. Once  I did the two main problems zero adj R23 bad. R6 3.3M leaky. I again replaced all carbons. I did not have a 91M so the mass on the upper left is 20M and one 10M. I replaced the cap and diode as well.


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Bradley Rush
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Posts: 220
Threads: 56
Joined: Oct 2011
City: Lompoc CA
#2

12-23-2016, 12:37 PM
Here is the page in the manual that helped


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Bradley Rush
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Posts: 220
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City: Lompoc CA
#3

12-23-2016, 12:38 PM
The schematics


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Marko
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Posts: 17
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Joined: Mar 2018
City: Concord State, Province, Country: NH
#4

11-18-2020, 01:27 PM
Hi, I am looking for some help on the R-23 when I try to do the calibration it says to adjust R-23 to zero the meter but R-23 does nothing. Where did you get with yours?


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Radioroslyn
Phorum Expert
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Posts: 7,284
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Joined: Dec 2009
City: Roslyn Pa
#5

11-18-2020, 02:17 PM
For those of you following at home here's a copy of the manual:  http://bama.edebris.com/download/eico/23...%20235.pdf
When my pals were reading comic books
I was down in the basement in my dad's
workshop. Perusing his Sam's Photofoacts
Vol 1-50 admiring the old set and trying to
figure out what all those squiggly meant.
Circa 1966
Now I think I've got!

Terry
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  1. The PHILCO Phorum
  2. Various and Sundry Categories
  3. Test Equipment