[GreenKeys] SELCAL - auto start proposed

Mon, 19 Apr 2004 15:37:55 -0400

Hi,

Well if we are going off into the wild blue yonder and getting all high 
tech about things here's what I would vote for:

A dual band out (we have two 3 KW Collins transmitters)
Quad+ band in (receivers are easy to find)
Cross band / multi band HF RTTY *repeater*

In and out on the same HF band is a little tough but not out of the 
question. Ten meter FM repeaters run ok at about a 100KHz split. That 
suggests we could get down around a 10KHz split on 80 meters. Of course 
10 meter cavities are a bit bigger than the average long bed pick up 
truck (they hang off the back and over the front of the truck). This 
might make shipping the 80 meter versions a bit tough via UPS ..... 
Crystal filters might be a better idea shipping wise.

I also ran a bbs for a lot of years. I'd still vote for a repeater. I 
always had fun on RTTY repeaters.

	Take Care!

		Bob Camp
		KB8TQ

On Apr 18, 2004, at 4:13 PM, Richard Schumann wrote:

> Hi Stan and group,
>
> About 15 years ago I ran a RTTY BBS on 3524 for a couple of years and 
> it was
> fun.  It was commodore based and I would fire it up after coming home 
> from
> work so I could monitor it and it got a fair amount of activity from a
> number of hams. The little TS120 was crystal controlled on 3624 
> running 1/2
> power, 50 watts.  I would put ARRL bulletins on it and such, plus of 
> course,
> the messages that could be left for each other.
>
> Are BBSs out of the question anymore?  I guy could bring it up and 
> adjust
> his machine (or just play around to his heart's content) then shut it 
> down.
>
> Just my two cents worth...I too miss the activity.
>
> Richard kn7sfz  (ex n7hh)
>
> ----- Original Message -----
> From: "Stan Wilson" <[email protected]>
> To: <[email protected]>
> Sent: Sunday, April 18, 2004 5:50 AM
> Subject: [GreenKeys] SELCAL - auto start proposed
>
>
>>
>> Back in the 60s several different frequencies were monitored by xtal
>> controlled transmitters and receivers allowing easy exchange of 
>> messages
>> and data between RTTY stations.  One could always find a station 
>> signal
>> with which to adjust your equipment and verify band conditions.
>>
>> I would like to propose running a SELCAL system on 80 and 40 meters to
>> increase activity and give us all signals we can use to test out our
>> equipment.
>>
>> 3.6375 MHZ at 170 Hz shift was used on 80 meters.   Does anyone know 
>> of
>> any reason we could not use that frequency today ?  If it is clear I
>> would be happy to obtain a batch of xtals so we can all be on the same
>> frequency.
>>
>> I am also looking into a simple "electronic stunt box" design we can
>> easily duplicate for SELCAL.
>>
>> Would appreciate your comments and suggestions for a frequency on 40
>> meters as well.  Perhaps if we get started now we can all have 
>> operating
>> stations by this Fall ?
>>
>> De Stan AK0B
>>
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