[TenTec] amp/tuner advice needed...

[Gary Tuck]

I'm considering a medium size amp--500-600w output--to team up with my 
Orion.  I would like to maintain QSK since I operate CW the vast 
majority of the time.  Should I be looking for a used Centaur or an 
older Centurion.  I'm not fond of blower noise at all and while the 
Centaur sounds like the right amp, I've read that the noise level is 
considerable.  And what about tuners--Is there any difference between 
the 238, 238A and 238B than cosmetics?

Have folks had good luck with the MFJ nee Ameritron amps in this output 
range.

Sure appreciate your thoughts and advice.  The only amp I've used--and 
it was a long time ago- was a Hammarlund and had a pair of 572B's.

Gary