I run my FTDX 101 with the HF Auto and LA 1K with the Palstars turned off most of the time. I also operate them independently with one or the other turn on or off.? They are here to use as needed not an appliance. My radio is on from 6 am to 10 pm 7 days a
week. I sure don't want to run those fans all the time. If the new ones won't it must be a chip thing. I think all understand that issue. Palsar is the best IMHO. Great product and service.
Steve W7CM
toggle quoted message
Show quoted text
There is a caution to be remembered in this regard and it has to do with having
two ATUs in the circuit.
A transceiver can be used barefoot through the LA-1K provided the external ATU (HF-AUTO or whatever) is the active ATU in order to protect the LA-1K.
There have been instances where hams have put their external ATU (HF-AUTO or whatever) in OFF or BYPASS, believing they could then use the
transceiver's internal ATU to do the matching.
Paul warned against doing this in a similar discussion a year or so ago, and the caution is printed in the HF-AUTO manual:
Bypass mode
bypasses the matching network.? Some users have the tuner in
Bypass allowing them to use their radio’s internal antenna tuner.?
Caution is
needed in this last case if an amplifier is in the circuit and turned off or in bypass.
The standing waves (SWR) will potentially have high voltage nodes that can
cause damage to the bypass components
in the amplifier.
In short, when operating a transceiver barefoot through the bypassed LA-1K, the operative ATU should remain the external ATU, not the transceiver's internal one (which should be disabled).
73,
Kent
K9ZTV
