[Elecraft] D-104

[Tom Skinner]

Hello Group,

After seeing several messages about the D-104, I decided mine looked better
in the shack than on the shelf in my study, so I spent some quality time
with it this weekend.

It has the preamp built in the base, and the little schematic glued to the
base is dated 9-75 which is about when I got it.

Wiring it up was no problem and it seems to drive the K2 just fine, but I
have a couple of questions.

1.  There is a switch on the board labeled E and H.  Can't for the life of
me figure out why it is there.  Seems to only switch one side of the push to
talk switch from ground or the other push to talk line.  So what's the E and
H?

2.  Has anyone tried running one of these off the K2 5V line available at
the mic jack instead of the internal 9 V battery?  VOX won't work as is
because the preamp is switched in and out with the push to talk lever.

Thanks in advance,

73,

Tom, KJ3D (Formerly W3QS)