K3 Connection to KAM+

[Joel Black-2]

For reasons I'd rather not get into, I found myself needing to get on
PACTOR I.  I ordered and received a used KAM+ and have gotten it
successfully hooked up and receiving on RTTY and HF Packet.  Problem is,
when I try and connect to a PACTOR BBS or even test on RTTY, I don't get
any output power and hear no tones as I do in the soundcard modes.  It
has been a long time since I used a modem for PACTOR, and I know at that
time, you would not hear the tones and maybe that's still the case with
the K3.

When trying to transmit, the radio goes into transmit, but I have no
output.  I did try changing the data mode to FSK, but the tone I got out
did not sound like what I remember PACTOR sounding like.  It sounded
nothing like RTTY when in RTTY mode either.

Here's what I have connected:

       KAM+                K3
       Pin 1 = TxD       Line Out
       Pin 2 = GND     PTT GND
       Pin 3 = PTT       PTT
       Pin 6 = RxA       Line In

Has anyone gotten an older KAM+ working properly with their K3?  Should
I not be going through the connections on the rear of the K3?  In the
past, I would go through the mic connector for PACTOR, RTTY, etc.  It
could be that I don't have the correct connections for the KAM+.  It was
a cable I used previously with either an FT-847 or FT-857.

73,
Joel - W4JBB
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[Richard Ferch]

Have you followed the instructions for AMTOR/PACTOR in the K3 Owner's
Manual?

Assuming pins 1 and 6 are audio signals and not logic signals, it looks
as if you have them connected backwards. Tx audio from the KAM+ should
be fed to the K3's Line In, and Rx audio should be fed from the K3's
Line Out to the KAM+ audio input.

To use audio signals, the K3 should be in either DATA A-REV mode or in
AFSK A mode, assuming the KAM+ is set up assuming the radio is in LSB;
if the KAM+ expects the radio to be in USB, use DATA A or AFSK A-REV.
These modes accept audio input. In FSK D mode, audio inputs are not used
(you would need a connection from the KAM+ FSK keying output to the K3's
ACC connector), and anyway I believe the K3's 170 Hz shift is suboptimal
for Pactor.

You can listen to the output signal being transmitted using the MON
level control on the K3's front panel.

To set transmit audio levels, set the K3's meter display to ALC and
adjust the Line In level (using the K3's MIC control) until you see 4-5
bars on the ALC meter.

73,
Rich VE3KI


W4JBB wrote:

> When trying to transmit, the radio goes into transmit, but I have no
> output.  I did try changing the data mode to FSK, but the tone I got out
> did not sound like what I remember PACTOR sounding like.  It sounded
> nothing like RTTY when in RTTY mode either.
>
> Here's what I have connected:
>
>        KAM+                K3
>        Pin 1 = TxD       Line Out
>        Pin 2 = GND     PTT GND
>        Pin 3 = PTT       PTT
>        Pin 6 = RxA       Line In

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Please help support this email list: http://www.qsl.net/donate.html