[GreenKeys] SELCAL - auto start proposed

Sun, 18 Apr 2004 15:44:03 -0700

I vote for 60wpm 5 level.

I have a 208U-3 project starting;  now all I need is a TU

Gerry 
AD6MC

-----Original Message-----
From: [email protected]
[mailto:[email protected]]On Behalf Of Bob Camp
Sent: Sunday, April 18, 2004 3:20 PM
To: Don and Diana Cunningham
Cc: [email protected]
Subject: Re: [GreenKeys] SELCAL - auto start proposed

Hi

You can count me in as well.

How do we address the sort of thing that pretty much killed both the 
VHF and HF nets I used to run on? Everything was ok as long as 60 wpm 5 
level code was king. 100 wpm (as in model 28's) started to make people 
itchy. As soon as 300 baud and ASCII came along you started to get lots 
of junk printouts .... made things a bit of a mess.

A couple of possible options:

1) Just define it from the start as 100 wpm five level and that's the 
way it's going to be. Model 33's will have to be happy sitting on the 
side lines or run eight level to five level converters.
2) Go with 110 baud ASCII and do five level to eight level conversion.
3) Go with something truly weird and convert to what ever you need 
(like run PSK modulation ....)

My vote would be for five level code at 100 wpm with 170 shift FSK as 
the modulation. That way we can run the good old stuff if we want to. 
I'd be happy if the group decided on 60 wpm to let the 15's and 19's 
participate. I only have 28's at this point ....

As far as SELCAL goes I would suggest a a slight departure from the 
past. I would *enable* the ability to use a solid state gizmo to read 
off the SELCAL and then fire up the model 28 using a solid state relay. 
Receive operation would be more like a VHF net in that respect. More or 
less send the magic words three or more times then follow with CR and 
LTRS combo's to let give the receiving machines time to get up to 
speed. The only need to send it all would be at the start of a QSO.  
It's a little bit more of a delay than a "normal" hf net but a lot less 
wear and tear on the machines.

I have a novel proposal as far as bands are concerned - modern HF seems 
to be hung up on adaptive link stuff. There's no reason why we can't do 
more or less the same thing. Receivers aren't the big deal they once 
where. Why not do something like define the band based on the time of 
day. If it's mid day the net is on 20 meters. If it's early evening 
it's on 40 and it's on 80 at night. Poor mans ALE ... We'd need a 
definition of who's morning noon and night we were talking about but 
that's pretty easy. Heck put it all in a spread sheet and post it. The 
only odd part would be deciding when to shift a QSO in progress.

One thing we do need - a net control who's willing and able to send the 
daily bulletin. That's what defines on frequency and proves that you 
can or can't bring up the machine correctly.

	Take Care!

		Bob Camp
		KB8TQ

On Apr 18, 2004, at 3:36 PM, Don and Diana Cunningham wrote:

> Count me in too, Stan!!  Have a nice 28 KSR coming, so should be 
> ready.  You
> and I should do well on 80m.  Oklahoma is close enough to you.
> 73,
> Don, WB5HAK
> ----- Original Message -----
> From: "Stan Wilson" <[email protected]>
> To: <[email protected]>
> Sent: Sunday, April 18, 2004 7:50 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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>
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