"I took the cover off mine and verified that the shunt resistor was missing and the series one measured 228 ohm. Clearly, if this is dynamically switched while seeking a match the poor exciter is going to be totally confused. "
The list and private replies I have seen seem to show the attenuator with both resistors presents a reasonable match to the exciter. The attenuator with R7 removed presents a horrible match to the exciter. With the single resistor attenuator active my TS-590S load is so bad that it folds back to very lower power output, far too low for the tuner to continue the tune cycle, so it would then switch out the attenuator. However, I don't see any sign that the attenuator is ever switched in circuit on my KAT500. I have only recently added ATTN to my monitoring and recording so I have no data from firmware 1.75 or earlier. If I get bored I may load 1.75 to see if I can detect attenuator activation. Andy, k3wyc ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
