[Elecraft] KPA1500 vs SPE Amps

[Ken K6MR]

I don’t have the facilities to measure IMD, but in 3 years I’ve never had an on-air complaint.  I also don’t have lab grade power measurement available, but there appears to be little loss in the combiner based on basic external wattmeter measurements.  I don’t operate 6 meters, but 160 – 10 is no problem.



The W6PQL splitter/combiner are the units he makes for his two pallet amplifier kit.  So they are being used well below the designed power level.



Ken K6MR



________________________________
From: elecraft-bounces at mailman.qth.net <elecraft-bounces at mailman.qth.net> on behalf of Bob McGraw K4TAX <rmcgraw at blomand.net>
Sent: Tuesday, February 12, 2019 6:33:54 PM
To: elecraft at mailman.qth.net
Subject: Re: [Elecraft] KPA1500 vs SPE Amps

I'd be interested in the IMD figures with this configuration.

Are the amps being driven hard wire / parallel at the inputs or from a
power divider?   And how are the outputs summed?  Power divider?   How
much loss is in the output summing network?   And is it broadband 160M -
6M?

Another thought is to use a broadband balun and drive the amps in
push-pull.   Both input and output likewise.   Hummmm...... I'll have to
think about that.

All interesting questions.

73

Bob, K4TAX



> Yes you can.  I have been doing this for the last 3 years.
>
>
> Ken K6MR
>
>
>

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