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Re: [Amps] K3 Drive Levels and the SPE 1.3K-FA

Subject: Re: [Amps] K3 Drive Levels and the SPE 1.3K-FA
From: John Simmons <jasimmons@pinewooddata.com>
Date: Sat, 16 Nov 2019 12:55:50 -0600
List-post: <mailto:amps@contesting.com>
Sounds like you have had some expensive learning experiences. The easiest solution is to put a 2-3 dB pad between the output of the K3 and the input of your amp. Look on eBay; you can find various combinations of connectors and loss ratings. They are not expensive.

-de John NI0K

dgb wrote on 11/16/2019 12:46 PM:
I run a lot of rtty and digital with my K3. I always set the amp to the mid range getting 8-900w out. It takes only 8-11 w drive from the K3 to accomplish that.

Note: SPE recommends to run the amp in Mid Range for digital operation. When I first got the amp I made the mistake of running it in the high range and melted the copper heat sink, which was not considered a warranty repair, and was an expensive lesson learned.

Over the  course of the 3 yrs. that I've owned the amp,  I have blown 4 LPA's in the K3 running it at 8-11w. With latest repair the tech informed me that the "LPA is not rated for continuous duty at upper power levels (like the digital Modes)" They suggested running 13w vs 11w so the LPA wouldn't be used. If I do that it over-drives the SPE in the mid-range.

What is my suggested recourse?

thanks 73 Dwight NS9I

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