[Elecraft] Help

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    On Saturday, November 22, 2025 at 05:08:00 PM GMT, <elecraft-request at mailman.qth.net> wrote:   

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Today's Topics:

  1. K3S/ P3 with SPE 1.5KFA (Samir Popaja)
  2. FS: Elecraft KSYN3 Synthesizers (Dave (NK7Z))


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Message: 1
Date: Sat, 22 Nov 2025 10:29:17 +0100
From: Samir Popaja <sm7vzx at gmail.com>
To: elecraft at mailman.qth.net
Subject: [Elecraft] K3S/ P3 with SPE 1.5KFA
Message-ID:
    <CAOvBGYLZDjnqki-M5BoJy4fiVF+dexbkvHQ=XU5Yit=fzr=ZgA at mail.gmail.com>
Content-Type: text/plain; charset="UTF-8"

Hi all,

I'm trying to get CAT communication working between my K3S + P3 setup and
an SPE Expert 1.5K-FA.
Here is my current configuration:

K3S USB ? PC (for DXLog CAT control)

K3S RS-232 (RJ45) ? P3 using the original Elecraft cable (connected to P3
?XCVR/RS-232?)

>From the P3 ?PC/RS-232? port, I made a cable:

P3 pin 3 (TX) ? SPE CAT DB-15M pin 1 (RX)

P3 pin 5 (GND) ? SPE CAT pin 4 (GND)

My goal is simple: I want the SPE 1.5K-FA to listen for CAT data and
automatically follow band changes from the K3S. I don?t need full two-way
control.

However, the amplifier only reports ?CAT Error? and never goes into LSN
state.

Is my wiring wrong, or am I misunderstanding how CAT pass-through works on
the P3?
Any advice from someone who has this setup working would be greatly
appreciated.

73,
Samir (SM7VZX)


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Message: 2
Date: Sat, 22 Nov 2025 05:48:05 -0800
From: "Dave (NK7Z)" <dave at nk7z.net>
To: Elecraft Reflector <elecraft at mailman.qth.net>
Subject: [Elecraft] FS: Elecraft KSYN3 Synthesizers
Message-ID: <53dd51f9-b9d6-4b9b-9513-723983dc8ecf at nk7z.net>
Content-Type: text/plain; charset=UTF-8; format=flowed

I have upgraded to a K4D, and no longer need the following items, which 
are now for sale:

Qty. 2 - Elecraft KSYN3 original, (not updated), synthesizers, working 
when removed from service, stored in anti-static bags. The pair for $140.00.

Buyer pays all insured shipping, US ONLY.  No returns so be sure you 
know what you are buying, and that you want these items.

73, and thanks,
Dave (NK7Z)
https://www.nk7z.net




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End of Elecraft Digest, Vol 259, Issue 19
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