[Elecraft] KPA3 for QRP

[AD6XY - Mike]

Yes Julian - you are right. There is no advantage in having a KPA3 for QRP
working. In fact, there is a bit of a disadvantage as it takes up space in
the case which you might be able to use for something else, like a battery
or a VHF transverter. 

Regarding the price, at $450 + VAT it is not particularly cheap compared to
any other broadband 100W HF amplifier you might buy. Couple it with the KAT3
at $300 you are into the $750 territory and I am sure there are cheaper and
more flexible alternatives. A good example being the K2 100W PA and ATU in
an external case.

If you really want a very clean signal, an external amplifier fed with a few
watts and in class A would be a better bet. You could then use a device like
an MRF151G with a 45V supply and if you wish to home brew check out the CCI
website for amplifier kits. A 200W amplifier running off 28V or 48V will be
very clean at 50W or so in class A.



Mike
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