[HBR] HBR-11/2000. Comments?

[Hopperdhh at aol.com]

The 12AX7 has been used as a modulator in zero bias, so it would be a good  
candidate for AF output.  It reportedly gave about 7 watts  output.  
Personally, I like a single 6AQ5, 6V6 or 7C5 with some  negative feedback like the Drake 
2B.  I don't like the class B pumping on  the B+ supply!
 
Dan K9WEK
 
 
In a message dated 7/25/2006 10:09:38 P.M. Eastern Daylight Time,  
N2EY at aol.com writes:

In a  message dated 7/25/06 8:22:23 PM Eastern Daylight Time, 
kf4tap at yahoo.com  
writes:


> Why not a 6sn7 or 6sl7 for audio output?   those are
> pretty common and cheap.
> 

I think the 6SN7  would be worth a try. Or a pair of 6J5s (6SN7 is two 6SN7s 
in one  bottle)

You probably can't get the 6SL7 to draw enough plate current at  250 plate 
volts to get the power output you want.

73 de Jim, N2EY  
************************************
Visit the HBR Receiver Web Site  with over 100 pictures of receivers and 
construction notes...... via  http://www.qsl.net/k5bcq/ 
there is also a mirror (faster response)at  http://k5bcq.edebris.com/


Retrieve reflector archived data via  
http://mailman.qth.net/mailman/listinfo/hbr