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

[Richard Knoppow]

----- Original Message ----- 
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?


>I have an Eico 667 that hasn't been used in a number of 
>years.  I
> brought it back up very slowly and it appears the filters 
> are OK.  Power
> supply ripple seems nominal.
>
> However I recently had cause to check a 6AQ5.  It barely 
> moved the
> "merit" needle.  I pulled another
> (used) one and it checked the same.  Altogether I checked 
> 7 or 8 6AQ5's
> (all pulls).  They all barely moved the needle in the same 
> way.   I find
> it hard to beleive they were all that bad.
>
> Other than buying a new 6AQ5, which may not be needed 
> should the tube
> checker be bad, does anyone know of a way to check the 
> performance of
> the 667?
>
> Your attention is appreciated,
> 73,
> Ray, W4BYG


     There are three instruction manuals and tube charts at 
the BAMA mirror site:

http://bama.edebris.com/manuals/eico

     Ignore the Dejavue one, its awful, the PDF is clean. 
The schematic shows no active components and not much in the 
way of calibration adjustments. Clean the switches and check 
the rectifier.  Check the tube charts on the BAMA site, its 
just possible there is an error in the settings on the chart 
you have.


--
Richard Knoppow
Los Angeles
WB6KBL
dickburk at ix.netcom.com