[TenTec] Hercules II 9420 Power Supply Problem

[John Huffman]

I use the Ten Tec 9420 power supply with my Hercules II.  It has the 
following problem -

With the Herc turned off, there are times when RF in the shack on 
certain band and antenna combinations causes the power supply to turn on 
and off in time with CW keying.  A big thump and buzz on each dit and dah.

With the amp turned on this is not a problem, the power supply just 
stays on.

I don't use the transceiver output from the power supply and only use it 
to run the Herc.

I suspect the transceiver sensing circuit is sensing a load in these 
situations and turning the supply on.  How can I disable that "feature"??

73 de K1ESE
John