[Elecraft] Remote Antenna Tuner

[Don Wilhelm]

Darrell and all,

The antenna tuner does not really have to be at the antenna feedpoint - that
is what we have open wire line for, and actually coax losses at HF over
short runs are not so lossy at all.

BUT, I do need a remote tuner capability in the situation that I have
created for myself.  I have a 150 foot run of coax before I can switch to
parallel line, and loss for that long run can be significant.

As for the tuners using a balun at the input - I have not seen any designs
using the 'floating chassis' that preserve the balance after the balun.  One
cannot put lumped impedances in one side of a balanced line and expect to
preserve balance through the network - Kirkoff says so!  A true balanced L
network (like a double-sided KAT100) could be implemented with a balun at
the input, but in my situation, I need the aux-bus to extend to 150 feet.  I
can even run separate wires, I don't care about running the control signals
over the coax.

73,
Don W3FPR

----- Original Message ----- 

| I concur wholeheartedly. The antenna tuner needs to be at the feedpoint.
| I would also like to see a balanced-balanced design where the balun is
| on the rig side of the tuner.
|
| Darrell   VE7CLA   K2 #1973
|
|
| On Sat, 2003-09-06 at 19:55, Kurt Cramer wrote:
| > Mike VP8NO wrote : "However, I would be interested in a Aux-bus line
| > driver pair capable of communicating up a co-ax cable to a weather
| > proofed KAT-100, where it should be, at the far end of the co-ax."
| >