[Elecraft] KPA1500 Power Level

[Lyn Norstad]

Bob -

Would you care to share your KPA500 power measurements at each of those drive levels (and test mode used)?

Thanks!

73
Lyn, W0LEN  (KPA/KAT500 user)

-----Original Message-----
From: elecraft-bounces at mailman.qth.net [mailto:elecraft-bounces at mailman.qth.net] On Behalf Of Bob McGraw
Sent: Sunday, September 19, 2021 9:22 PM
To: elecraft at mailman.qth.net
Subject: [Elecraft] KPA1500 Power Level

I've said this for years, even with tube type amplifiers.  One 
exception, to which I'm aware,  is the Johnson Thunderbolt which uses a 
variable L along with variable C for the input components to the Pi L 
network.   Otherwise, the Pi network input circuit is using a fixed 
value of L  and a variable C for the frequency. Thus it is designed to 
match the output device Z only at rated power.

I've performed power measurements on my KPA500 on all bands at 100 
watts, 200, watts, 300 watts, 400 watts, and 500 watts output.  
Measuring input power and output power and calculating efficiency, 
dissipation, and gain on all bands, 160M - 6M.

73

Bob, K4TAX