[Elecraft] KXPA-100 to ICOM PW-1 amplifier

[Charlie T, K3ICH]

> Just to clarify... use of ALC with the PW-1 is not to adjust drive power. 
> That's a bad practice. You MUST use the ALC line because the amp uses this 
> as a primary means of protection. Without ALC, a fault condition can 
> damage the amp.
>
> 73,
> Josh W6XU

Well, yes it is when connected to an Icom transceiver it is used precisely 
to control drive power.

I have the PW-1 connected as recommended in it's manual to an IC-7600.  My 
output control is set for about a hundred watts barefoot and 1 kW when the 
amp in enabled.   The output power when driving the PW-1 is far less than 
100 watts and the only thing controlling the drive is the ALC line.

Besides, I thought that's exactly what I said.....

The proverbial fly in the ointment is that the I don't believe the KX3 HAS 
and ALC input.

Chas


----- Original Message ----- 
From: "Josh Fiden" <josh at voodoolab.com>
To: <elecraft at mailman.qth.net>
Sent: Tuesday, July 29, 2014 9:54 PM
Subject: Re: [Elecraft] KXPA-100 to ICOM PW-1 amplifier


> Just to clarify... use of ALC with the PW-1 is not to adjust drive power. 
> That's a bad practice. You MUST use the ALC line because the amp uses this 
> as a primary means of protection. Without ALC, a fault condition can 
> damage the amp.
>
> 73,
> Josh W6XU
>
> On 7/29/2014 12:41 PM, Charlie T, K3ICH wrote:
>> You better make sure you have a reliable ALC connection in there 
>> somewhere because you'll smoke the PW-1 if you hit it with a hundred 
>> watts.  They normally take about 35 -45 watts drive for full output.
>
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