[Test-Equipment] Eico 667 Is there a way to check performance?

[WA5CAB at cs.com]

There is also another possibility no one has yet mentioned.  If the tester 
returns expected results on several each of several other type tubes there 
may be a never corrected typo in the setting charts.  This happened with the 
I-177 and the TV-7's.  Every 1R5 I (and a number of other people) have ever 
tested in either model tester either fails or barely passes.  Several of us 
finally concluded the the chart call-out for the meter range switch was 
probably wrong.  Switching the range switch one step higher in sensitivity gives 
about the sort of reading relative to the minimum stated value as one sees 
with most other NOS tubes.

In a message dated 12/12/2010 9:32:45 PM Central Standard Time, 
k4pf at juno.com writes: 
> ----- 
> From: "Ray LaRue" <w4byg at att.net>
> To: "Discussion of Electronic Test Equipment" 
> <test-equipment at mailman.qth.net>
> Sent: Sunday, December 12, 2010 2:28 PM
> Subject: [Test-Equipment] Eico 667 Is there a way to check 
> performance?
> 
> Hi,
> 
> I would start by testing a rectifier tube (known good, if available).
> 
> If that shows weak, then you should check your panel meter.
> Assuming the contacts are clean on the selector switches,
> that's about the only failure mode.
> 
> Isolate the meter and attach a 9V battery with a 47K resistor
> in series. That should give you about 190uA on the 200uA FS meter.
> 
> 73,
> Ed Knobloch

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