-----Original Message-----
From: Hans Goldschmidt <sm5ki@algonet.se>
To: measures <measures@vcnet.com>; amps
<amps@contesting.com>
To: <amps@contesting.com>
Date: 30 October 1999 17:50
Subject: SV: SV: [AMPS] feedback sought: Ameritron AL-80
Thanks!
Yes, a string of short pulses and a pep output meter is the
right method
tuning up an amplifier. For a grounded grid linear, tune for
maximum output
and increase loading a bit beyond that and try to keep the
manufactures
recommended relationship beetween anode and grid current.
The grid current
is also a good indicator of proper loading.
-------------------
In all the Eimac data for g-g triodes I can recall, there is
a statement that the grid
current value is immaterial provided it is within the spec.
maximum. There isn't a recommended relationship, although
there are 'typical' values. Clearly, you can use it as an
indicator for any given tube once you have established how
that tube behaves - in practice, are tubes sufficiently
similar to aim for the typical values every time? I guess it
will vary according to PSU regulation too?
Steve
--
FAQ on WWW: http://www.contesting.com/ampsfaq.html
Submissions: amps@contesting.com
Administrative requests: amps-REQUEST@contesting.com
Problems: owner-amps@contesting.com
Search: http://www.contesting.com/km9p/search.htm
|