[glyphmon]

Mike,

The difference in that case was not the antenna.  With the antenna disconnected, I have not been able to receive any signal, so far at least.

With the antenna connected, and not tuned to any station or signal, the readings are as they have been, 175V and 61V-65V.  With the antenna still connected and tuned to my AM transmitter, then we get the 187V and 91V.

It is the difference between tuning to a station or tuning to NO station (as the testing guidelines specify).

This data specifically was in response to MrFixr55's question from 5/14: "Before desoldering, try measuring the Screen (Pin 4) voltages while receiving a signal from your AM transmitter.  This should cause a high negative AVC voltage which should lower tube current.  This will be an interesting piece of info."

Best wishes,
Roy