[Elecraft] KPA500 installtion with ICOM 7300
Joe Subich, W4TV
lists at subich.com
Wed May 9 19:40:33 EDT 2018
On 2018-05-09 6:48 PM, Jim Brown wrote:
>
> It's certainly OK to HOOK UP the ALC cable, but it's VERY BAD
> PRACTICE to DEPEND on ALC to set power out. Doing so is a recipe for
> terrible clicks and splatter. ALWAYS set power using the output power
> knob on the transceiver. The ONLY virtue of ALC is to protect the
> power amp from an operator screw-up, or from something going wrong in
> the antenna system.
That's the point. The ALC cable protects the KPA-500 when the operator
"spaces" and leaves the exciter power control at full power (100+ Watt)
level.
> It takes about 25-30W to drive a KPA500 to full power.
Therein lies the case for a 4-6 dB attenuator inside the amplifier.
The attenuator can be left in-line and the exciter can be operated
at its normal (100 W) output level without concern for overdrive
and/or damage.
73,
... Joe, W4TV
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