[Amps] SPE 1.3K-FA and FTDX-5KMP

Jim Brown jim at audiosystemsgroup.com
Sat Nov 14 12:23:02 EST 2015

On Thu,11/12/2015 11:23 AM, Richard Solomon wrote:
> What would folks think about running the FTDX-5KMP
> in Class A to drive the SPE Amp ?

I measured occupied bandwidth of an FTDX5000 after the Sept 2014 
firmware update in both normal and Class A modes. The FTDX5000 is pretty 
clean on SSB either way, Class A is only slightly better. It's wide on 
CW, mostly due, I believe, to carelessness about keying waveshape and to 
the overly fast keying slope.

Measured data is here. http://k9yc.com/FTDX5000_Report.pdf

73, Jim K9YC

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