Hi all, I just got done rebuilding a Heathkit DX-60 and a DX-40. Did them at the same time. Pretty much the same transmitter in a different case. So everything tests fine, both transmitters are putting out about 55 ish watts CW so all is well there. Plenty of grid to play with and i am setting it to 2.5 instead of the 3 ma the book says.
My questions is, on the DX-40, when I key down, the plate spikes to about 175ma (50ma higher then the setting of 125 ma), then settles back down to to 125ma. The DX-60 does not do that. Is this ok? or do I have an issue to find?
Thanks
Dave
KC3GMQ
The DX-40 has poorer Power Supply regulation than does the DX-60.
Due to the poorer PS regulation, the DX-40 power supply voltage simply drops voltage faster at KeyDown than does the DX-60.
Nothing to really worry about.
There are a number of Improvement/Enhancement mods down here:
http://amfone.net/Amforum/index.php?topic=43002.0Phil - AC0OB