[Milsurplus] Fixing up an I-177B tube tester

[WA5CAB at cs.com]

Ian,

If the meter needle is bent to the left, that could certainly account for 
the line voltage setting problem.  Unfortunately, I think that getting into 
the -B meter is difficult (if I'm not confusing it with another set).

The 47 ohm parasitic suppression resistors (3 of them) are in the TV-7(*).  
But I don't know of any MWO adding them to the I-177B.

In a message dated 3/25/2011 4:06:49 PM Central Daylight Time, 
ianmwilson73 at gmail.com writes: 
> Paul, Robert,
> 
> I think this may be along the correct lines. I measured the voltage across
> the 25k series
> resistor and did some calculations. The meter position at 0.7mA - which
> should be half
> scale - isn't correct.
> 
> I also note that the meter isn't on zero when the power is off, and the
> meter pointer is
> bent somewhat to the left.
> 
> I will continue to work the other problem. I don't see any 47 ohm stopper
> resistors - perhaps
> these were a field modification?
> 
> Thanks for the help so far!
> 
> 73, ian K3IMW

Robert Downs - Houston
wa5cab dot com (Web Store)
MVPA 9480