[Elecraft] K3/0 and KPA500

[D Joyce]

Hi Reto:  I have been working on a K3/0 to a K3/100 + KPA500 system with a 
friend of mine and have an alternative suggestion for remote control of the 
KPA500 that may work for you.

Recall that the K3-Remote Owner's Manual Rev A, pg 15, has a section 
"Controlling a Remote KPA500 from the Local Site"; however, it requires 
modification of the K3 to KPA500 Cable and also impacts use of the PR6 
preamp - all as discussed in the email from Brandon KG6YPI this morning..

Since I have a Dell D830 Notebook in the "Local" shack for control of the 
RemoteRig RRC1258 units and for rotor and remote switching / control using 
the MicroBit 1216 H and L units, I also use that Notebook computer for (a) 
running RTTY (FSK) Tx mode (more about Rx later) using MMTTY and also (b) 
for remote control & monitoring of the KPA500 using the KPA500 Util.  Note 
that when the Program mode 14 = K3 Twin is set in the Radio Settings of the 
Control and Radio RRC (see pg 43 - 45 of the RRC User Manual, Rev A25), 
then Com1 is available as a transparent serial channel between the Control 
RRC and the Radio RRC over the internet (see pg 49).  I use this Com1 
channel for the KPA500 Util and get full functional control of the KPA500. 
The problem in getting it to work was resolved (by Brendon at Elecraft) with 
the addition of a null modem adapter in the serial line between the Com1 
connector on the Radio RRC and the RS232 (PC) connector on the KPA500.  You 
also need to set the Com1 Serial settings to Mode-3 and the baud rate to 
38400 on both the Control and Radio RRC's.  Also in the Control RRC, if you 
are going to use the USB port for RTTY, as I did, then you will want to set 
the "Use USB Com Port as COM1" to NO.

For dual RTTY Rx, since the K3/100 includes the SubRx,  I route both Main 
and SubRx audio from the Control RRC Speaker (SP) to the AF Line input on an 
old IBM PIII-600 (running two instances of MMTTY) through a pair of Timewave 
DSP-9+ units.  (I used the 2nd  computer since the Dell notebook didn't have 
dual channel Line input and the DSP-9+ units provide separate adjustable 
speaker output for monitoring purposes.)

I have wiring block diagrams - if any one is interested just send me an 
email to d_joyce at sympatico.ca

Hope you find this useful.

73,  Doug Joyce   VE3MV


----- Original Message ----- 
From: "hb9trt" <rm at starnet.ch>
To: <elecraft at mailman.qth.net>
Sent: Wednesday, July 18, 2012 7:22 AM
Subject: [Elecraft] K3/0 and KPA500


> Hi
>
> I try to connect the KPA500 with the Y-cable to the K3/100 (local) and 
> would
> like to use it with the K3/0 (remote). This seems to work now, after some
> initial issue. But is it possible to switch the KPA500 from Operate to
> Standy and vice versa over the K3/100 or K3/0 (more important). Maybe with 
> a
> micro on PF1 or something like that.
> Is it also possible to switch the KPA500 on and off like the K3/0 which
> starts the K3/100 through the rigset?
>
> I don't use the PA for every QSO, mostly not, but I have to decide in my
> Shack if I use the KPA500 allways or not.
>
> vy 73
> Reto
>
> --
> View this message in context: 
> http://elecraft.365791.n2.nabble.com/K3-0-and-KPA500-tp7559361.html
> Sent from the Elecraft mailing list archive at Nabble.com.
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Elecraft at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>