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

[J ALLEN CALL]

Hello:  When a piece of equipment lies dormant for many years the switch contacts become oxidized and they do not make good
contact.  I suggest that you use some de-oxit on each wafer and move each individual switches back and forth through its contacts.
Another possibility, but not likely. is that all of the pull 6AQ5's are bad.  Check some other tube/s.
 
J
W7KSg 

 



 
> Date: Sun, 12 Dec 2010 17:28:53 -0500
> From: w4byg at att.net
> To: test-equipment at mailman.qth.net
> 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
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