Ah, but Wayne and I have veto power.. both have to agree. :-)
e
-------- Original Message --------
Subject: Re: [KPA500] IO Board Schematic
Date: Tue, 24 Nov 2009 17:35:05 -0800
From: Lyle Johnson <
[hidden email]>
To: Eric Swartz - WA6HHQ, Elecraft <
[hidden email]>
CC: Robert Friess <
[hidden email]>, Jack Brindle
<
[hidden email]>, Rod Brink <
[hidden email]>, wayne burdick
<
[hidden email]>, "Bob Wolbert, K6XX" <
[hidden email]>, Lyle Johnson
<
[hidden email]>
Eric Swartz - WA6HHQ, Elecraft wrote:
> I agree.
Looks like we now have both a quorum *and* a veto-proof vote :-)
L
> e
>
>
> Lyle Johnson wrote:
>> Hello Bob!
>>
>>> If we all agree that the ALC voltage will be derived from analog
>>> processed FWD power and MCU processed REFL power, PA current, and
>>> Heatsink Temperature in some yet-to-be-defined SMOP way and that
>>> these voltages will be summed and inverted with a simple voltage
>>> divider rear panel or MENU adjustable potentiometer on the output and
>>> that all of this circuitry will reside on the front panel with only a
>>> single wire going to the IO board, I will craft a schematic.
>>
>> Well, you and I agree. Wayne's out of town, so we'll assume he
>> agrees. since he can't deny it :-)
>>
>> Seems reasonable that we want FAST reaction time in the case of
>> overdrive. I'm not certain that forward power will tell us that, but
>> it seems like it could.
>>
>> The temperature stuff, reflected power stuff, etc., should be fast
>> enough through the processor if you think the PA transistors can stand
>> the effects of a sudden open or short when running full allowed power
>> without damage until the processor can intervene.
>>
>> Lyle
>
>
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