[Elecraft] XV144 paired with ICOM

[Wyn Hughes]

Don,

Thanks, that's immensely helpful.

I will probably do a jury rig switch from my dc supply for the base tests 
and then set up a pickup point when everything else is tested ok (in due 
time).

Thanks for the heads up on the DE9. Appearances can sometimes be deceptive.

73
Wyn, VR2AX

----- Original Message ----- 
From: "Don Wilhelm" <w3fpr at earthlink.net>
To: "Wyn Hughes" <vr2ax at attglobal.net>; <elecraft at mailman.qth.net>
Sent: Friday, October 20, 2006 9:46 PM
Subject: RE: [Elecraft] XV144 paired with ICOM


> Wyn,
>
> I don't know what the ICOM requires, so you will have to verify their
> requirements, but I can say that there is no signal of the type you 
> describe
> as an output from the XV144.
>
> Internally, there are several places where you can pick up 12 volts 
> whenever
> the transverter is powered on - the cathode of D14 seems to me an easy 
> place
> to connect to.  You could connect that through a 10l resistor and bring it
> out to whatever place is convenient for you.
>
> Since you referred to the DE9 connector on the transverter as "RS232", I
> must comment - IT IS NOT!!!
> That connector is a 9 pin connector for connecting to the K2.  Accidently
> connecting RS232 levels to this connector can damage the transverter
> (particularly selected pins of the microprocessor on the front panel)
>
> 73,
> Don W3FPR
>
>
>> -----Original Message-----
>>
>> A slightly tangential question. My XV144 is currently on order. I
>> am planning to use it once built with my Icom IC-781 as the 28 mhz IF.
>>
>> The IC-781 requires a 'trigger' voltage of 2-13.8V dc into 10K
>> ohm on one of the rear accessory sockets, in order to enable the
>> low level transceive port on the rear of the radio. This is, I
>> believe, a standard Icom setup, similar on the IC-7800 etc.
>>
>> After some heavy pouring over of the downloaded copy of the XV144
>> literature, I am still not sure whether this voltage is supplied
>> by the XV144. There are a number of obvious easy, if less than
>> 'neat', workarounds if required, but does anyone know if the
>> XV144 can supply a control voltage of that level, 'on' when the
>> XV144 is switched on, and 'off' when it is switched off? Eg off
>> the RS232 port?
>>
>> 73
>> Wyn, VR2AX
>>
>>
>