FCC rules specifically prohibit an easily removed or bypassed input pad for
exceeding the 15 dB gain limit.
Eric
elecraft.com
On 4/2/2015 10:30 PM, Igor Sokolov wrote:
Joe,
As I was told, they ship it with the pad at the input to meet FCC requirement
of max 15db gain. But the pad can be easily bypassed. Just wonder, what is
the reason for such a requirement?
73, Igor UA9CDC
----- Original Message ----- From: "Joe Subich, W4TV" <li...@subich.com>
To: <elecraft@mailman.qth.net>
Sent: Friday, April 03, 2015 7:48 AM
Subject: Re: [Elecraft] Question K3 ALC w/SPE Expert 1.3K-FA amp
This is because the software in the amp automatically reduces the
power in the rig to the best output level for the amp (on the amp
LOW=500W out= 3W drive, MID= 1000W out= 6W drive, HIGH = 1500W out =
9W drive). It works flawlessly. Actually, I could leave the power on
the Pro III untouched, and the amp reduces the power accordingly.
Is SPE shipping amplifiers that violate type acceptance or did you
modify that amplifier? Any commercial amplifier sold in the US can
have a maximum gain of 15 dB. Your Expert 1.3K-FA shows 22 dB -
nearly 6 dB above the limit.
73,
... Joe, W4TV
On 2015-04-02 10:34 PM, AB2E Darrell wrote:
Hello all,
I am the proud new owner of a new K3. I am also the proud new owner
of an SPE Expert 1.3K-FA solid state amp, and I have a question for the
group regarding interfacing the K3 to the amp.
My current setup is using my Icom 756 Pro III with the SPE Expert 1.3K-FA.
The recommended setup for Icom was to connect both the Relay and ALC cables
between the rig and amp. This is because the software in the amp
automatically reduces the power in the rig to the best output level for the
amp (on the amp LOW=500W out= 3W drive, MID= 1000W out= 6W drive, HIGH =
1500W out = 9W drive). It works flawlessly. Actually, I could leave the
power on the Pro III untouched, and the amp reduces the power accordingly.
My question for the group is, is there a way to allow the K3's output to be
controlled by the amp? I see the note on p27 about not using an amp to
control the K3's output, but wonder if there is a safe way to do it. For
instance, could the K3 be set to say 15W out on all bands via the menu, then
allow the amp to control the output via ALC for optimum drive?
Any info and comments appreciated.
73 Darrell AB2E
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