[Elecraft] KPA1500 amplifier with built-in ATU, separate power supply

[Alan. G4GNX]

This reminds me of a visit to the underground BBC World Service, back in the 
1980s.

There were three RCA transmitters for MF, two in use and one on standby. 
They were capable of output around 1+1/2 Megawatts.

The final stages were in Faraday Cages, but they still invited my son to 
wander round inside one, with a fluorescent tube lit up like Darth Vader!

I asked about tuning for low VSWR and they said they didn't bother much. 
What comes back simply goes up again for another try. :-)


73,

Alan. G4GNX

-----Original Message----- 
From: David Woolley
Sent: Saturday, April 22, 2017 10:06 PM
To: elecraft at mailman.qth.net
Subject: Re: [Elecraft] KPA1500 amplifier with built-in ATU, separate power 
supply

..................In real systems, most of the reflected power bounces 
straight back out
again when it hits the PA, to get another chance to be lost in the
feeder, or even radiated.  Of course this may cause the PA to run out of
volts, or gain, and clip or distort, or exceed the safe operating area,
and melt bond wires, or destroy the chip itself.

-- 
David Woolley Owner K2 06123