[Collins] 6AQ5 v. 6BF5?

[Glen Zook]

To use the 6AQ5 in the Collins S-Line receivers
requires some modification of the circuitry.  There
have been articles on this in several amateur radio
publications.  If you do not make the modifications
the 6AQ5 runs even hotter and the audio distortion is
considerably greater.

All in all, if a 6BF5 is available it is usually best
to leave things alone.

Glen, K9STH


--- Gerald <geraldj at ispwest.com> wrote:
I don't see typical operating conditions for the 6AQ5
at 110 volts on the plate which is the typical
condition for the 6BF5. For the data given the 6AQ5
needs 12.5 volts grid bias and the 6BF5 needs 7.5
volts bias. So it may be that the 6AQ5 will draw more
than typical plate current when biased as a 6BF5. With
the difference in heater power, the 6AQ5 may still run
cooler.
 
I'm sure the 6AQ5 has been run in 6BF5 sockets.

Glen, K9STH

Web sites

http://home.comcast.net/~k9sth
http://home.comcast.net/~zcomco


		
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