[Elecraft] Linear thoughts

[John Marvin]

I want to echo that a KPA-1500 be the same as the KPA500 in terms of 
ease of use and interface, solid state, QSK switching, etc.

Some of my points:

Some have said "at least 1000W". In my opinion, that is not a big enough 
step above the KPA500, but some will make the case that 1500 isn't 
either, but at least it is the max allowed. If you're going to sell an 
amp above the KPA500 make it full legal limit.

Leverage what you can from the KPA500, but at the same point, the KPA500 
design is getting a little old. A lot has happened in high power solid 
state RF electronics since then. I would prefer that the amp be based on 
LDMOS RF Power transistors. Perhaps the MRF1K50HR5 from NXP 
Semiconductors should be considered. LDMOS is known for great linearity 
and the latest devices are pretty rugged.

If you do invest in a newer design, consider some backwards leverage 
from the KPA1500 (if that is what you call it) to the KPA500, i.e. an 
updated KPA500 V2 that leverages some of the new design and perhaps 
makes supporting the two amps easier.

I may never buy a KPA1500, but I once said that I would never want more 
than 100W when I bought the KXPA100, but now I own a KPA500/KAT500!

73,
John
AC0ZG

On 3/24/2017 4:11 AM, Arie Kleingeld PA3A wrote:
> Besides the usual things nearly every other hi-end linear has:
> - tuner built-in as an option
> - really light weight
> - at least 90% efficiency
> - one, max 2 antenna ports
>
> (these fit into the portable rig philosophy of Elecraft)
>
> 73
> Arie PA3A
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