[1000mp] Driving 3-500Z Amp with Mark V

[Les Bannon]

At 08:57 AM 5/4/2004 -0700, you wrote:
>I have a brand new Mark V and I am trying to drive
>a Drake L7 amp and a TL-922A amp but the Mark V
>just shuts down and wont put any power out at all.
>
>I have a Mark V and a TL-922A.  I found out a problem with the Mark V and 
>3-500Z tubes. I had some diodes blow in the
   Mark V causing the power output on the Mark V to go to full 200 Watts 
output. the SWR meter is
   inop you cannot cut down the power.  I found what happened was you can 
very easily overdrive the TL-922A with to much
   input power for a second the TL-922A is very forgiving and will take 
this for a second but it will back up to the Mark V and
   blow the diodes. Since then I first be sure the Mark V button A is set 
for no more than 75 watts output and cut the power gain
   back to 50 percent and have the settings marked on the TL-922A. This has 
worked perfect and no problems since I started to
   do this.

    Les WF5E



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