[Elecraft] KPA500 Voltage range?

[Lyn Norstad]

Yup.  That's exactly what's happening here - except the numbers are a notch
or two lower.

 

73

Lyn, W0LEN

 

 

From: Andy Durbin [mailto:a.durbin at msn.com] 
Sent: Wednesday, July 06, 2022 2:58 PM
To: elecraft at mailman.qth.net; Lyn at LNAINC.com
Subject: Re: [Elecraft] KPA500 Voltage range?

 

"I though Elecraft wanted HV to be kept at or above 60 to avoid unacceptable
IMD.  No sure where I found that but don't think I imagined it. "

 

The problem with making measurements is that one may not like the results.
It's a nice warm afternoon here in Glendale AZ and I expect every air
conditioner in the street is running.  Line voltage is down to 116.4 and
loaded HV is well below 60 now.

 

 1:13:59.663  KPA Mon frozen 

              TX freq = 50314500 Hz

              Drv pwr = 027 W

              Pwr meter = 12 dots

              KAT SWR =  1.18

              KPA SWR = 01.2

              PA voltage = 56.8 V

              PA current = 13.7 A

              PA input = 778 W

              RF out = 495 W

              PA diss = 283 W

              PA effic = 63%

 

Andy, k3wyc