Amps
[Top] [All Lists]

[AMPS] Henry 3K

To: <amps@contesting.com>
Subject: [AMPS] Henry 3K
From: measures@vc.net (Rich Measures)
Date: Sun, 31 Jan 1999 15:02:02 -0800


>
>Gentlemen,
>I am having a prob. with my 3K.  I cannot get it to load past 600ma.
>in the pa volt position the voltage is 2500 in cw/tune.  in ssb the reading
>is 3500v.  The resting current is cw is 90ma and in ssb it is only 120ma.
>
>I originally thought the tubes were soft and installed new ones but nothing
>has changed from the old tubes.
>
>According to the manual the resting current in cw should be between 100 and
>120ma and in ssb between 170 and 220ma so it would appear at first glance
>that the problem is attached to there. 
>
Measure the potential between the grid and the filament CT (cathode).  
This is your bias V.  It is probably a bit too high.  Getting ur bias 
from a string of diodes on a perfboard would allow setting the ZSAC to 
the needed 170mA or so.  
> 
>
>Larry
>
>--
>FAQ on WWW:               http://www.contesting.com/ampfaq.html
>Submissions:              amps@contesting.com
>Administrative requests:  amps-REQUEST@contesting.com
>Problems:                 owner-amps@contesting.com
>Search:                   http://www.contesting.com/km9p/search.htm
>



Rich...

R. L. Measures, 805-386-3734, AG6K, www.vcnet.com/measures  


--
FAQ on WWW:               http://www.contesting.com/ampfaq.html
Submissions:              amps@contesting.com
Administrative requests:  amps-REQUEST@contesting.com
Problems:                 owner-amps@contesting.com
Search:                   http://www.contesting.com/km9p/search.htm


<Prev in Thread] Current Thread [Next in Thread>