[Johnson] Johnson T/R switch TVI problems..?

[Glen Zook]

For the DX-100 PTT:  I would use a low-voltage DPDT
relay and control it with a "normal" type of foot
switch.  That way you won't have any voltage problems
on the foot switch and the contacts on the relay
should be plenty heavy to handle the DX-100.

As far as the TR switch goes:  I have never owned an
actual Johnson TR switch, but used a home brew
equivalent for some time back in the 1959 - 1961 time
frame.  When used with a low-pass filter I never had
any problems with TVI and this was in a Channel 2
fringe area.  That was with a DX-100 and a
Hallicrafters S-85.

Glen, K9STH

--- Jordan Arndt <jordana@nucleus.com> wrote:
> 
> 
> Hi... so what is the lowdown on the EFJ T/R
> switch...? Does a EFJ Low Pass
> filter remove enough of the harmonics..? Adding a
> tuner should help, but I
> live in a fairly congested area and would like to
> know more before I put the
> switch in line with my DX-100...
> DOes anyone know of a source of a DPDT Foot switch
> that I could use with the
> DX-100...?
> It has to be dual switched according to the
> manual.... 

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