[ETO_Alpha] 77SX

[Randy Starace]

HI Guys,  I have both the 87 and the 77SX and the only mod I have in the SX is raising the starting bias.   I have noticed that as the first syllable drives the auto bias circuit,  the amp goes through a class change.  The result is a raspy effect until the bias raises into the AB1 region.  My bias control PCB was the older one with a fixed resistor in place of a variable pot.  I changed it back to the pot.  I increased the bias just enough for a far field monitoring station to say that the phenomenon was gone.   BTW  hi Mac.
Randy Starace
http://www.kk7tv.com