[Elecraft] [ELECRAFT] KPA500 NEW OWNER QUESTIONS.......

[Bob McGraw K4TAX]

Yes, improperly or incorrectly using ALC with any amp or any 
transceiver, for that matter,  can and usually does produce distortion 
and splatter.   Just look at some of the signals on the bands and 
observe the ALC overshoot which exists with many radios.   And it is 
made worse by the addition of an amplifier in line. It isn't pretty!.   
Yet it has little impact on the on frequency signal as heard and thus 
the "great signal" complements follow. But look at the other factors 
where you will find "NOT so great signal".   These points should be 
addressed as well.

73

Bob, K4TAX


On 2/28/2019 1:04 PM, john at kk9a.com wrote:
> I have not used ALC with any amplifier since transceivers switched to 
> transistor finals. From what I have read on this list, using ALC 
> improperly can cause distortion.  Just be very careful with your drive 
> level. I believe that the KPA500 can handle 100 watts in bypass, 200 
> watts may be pushing it. The KPA500 is a very nice amp and it is easy 
> to use with any transceiver.
>
> GL,
> John KK9A
>
>
> JIM LAGESON N0UR wrote
> _Thu Feb 28 13:07:27 EST 2019_
>
>
> -------------------------
>
> I have never owned an amp before and recently put together a KPA500. All
> seems to be working well, but I have a few questions. I am using with a
> IC-7300.
>
> How important is the ALC cable? I notice it is not included in the Basic
> Cabling Diagram in the manual but is discussed later in the manual.
>
> If I were accidently to run 100 watts into the KPA500 will the PWRIN HI
> Hard Fault/STBY protect itself before any damage is done. Would ALC 
> protect
> me from that?
>
> Is it standard procedure to keep the KPA500 in line when turned off 
> and not
> in use? I see you may run up to 200 through the KPA500 in STBY.
>
> Is there any concerns or settings on radio when running full break in 
> on CW?
>
> Thanks
> Jim-N0UR
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