[TenTec] Amplifier Question

[Steve Berg]

Many thanks for the replies.  I have never run an amplifier at HF, 
having spent most of my time on 6 and 2 meters for many years.  I 
recently upgraded from Advanced to Extra and have been spending more 
time with my Omni V on HF.  It looks like I ought to start looking for a 
QSK capable amplifier to keep things simpler, but I am limited by 
circumstances to something running 500 watts output or thereabouts.  I 
guess I will start looking for a good used Centaur or Hercules II amp. 
Any suggestions on where these might be most readily found?

73,

Steve WA9JML