Hi all,
sure I do!
We used the LO 15 and LO 133; a bit noisy
but reliable; and we used 170 Hz shift already
back in 1964 with a commercial (cristall-controlled)
HF-RTTY-link.
Wonder why it is that nostalgic since the ACP 126C has
been updated lin November 2009?
May be it's a silly question?
73 Heinz DK7UM
----- Original Message -----
From: "Robert Chudek - K0RC" <k0rc@citlink.net>
To: <ws7i@ewarg.org>; <rtty@contesting.com>
Sent: Thursday, June 10, 2010 4:09 AM
Subject: Re: [RTTY] BARTG 75 RTTY Sprint?
Here's the url: http://jcs.dtic.mil/j6/cceb/acps/acp126/
It's an interesting piece of nostalgia dated 1989. The text establishes
military operating procedures for both landline and communication links
using HF. I liked the section where circuit testing would commence by
installing a tape loop and THE QUICK BROWN FOX was transmitted twice with a
second Line Feed intentionally suppressed. This would visually reveal any
circuit problems because of the mis-matched over print. Obviously the
equipment being used would be mechanical TD's (tape distributors) and
Teleprinters in that environment.
Anyone remember the 'RTTY ART' that was created and exchanged "back in the
days"?
73 de Bob - KØRC in MN
----- Original Message -----
From: "Jay" <ws7i@ewarg.org>
To: <rtty@contesting.com>
Sent: Wednesday, June 09, 2010 6:49 PM
Subject: Re: [RTTY] BARTG 75 RTTY Sprint?
Sure ref: ACP 126C. 850 Hz shift works very well on 2 Mhz military channels
Jafy
On 6/9/2010 4:37 PM, Robert Chudek - K0RC wrote:
> No one will be using a wider shift. It wastes bandwidth and is prone to
> more
> errors.
>
> Do you have a url regarding a "NATO standard 850 Hz Shift"? I've never
> heard
> of it.
>
> 73 de Bob - KØRC in MN
>
>
> ----- Original Message -----
> From: "Jeffrey M. Swiger"<N8NOE@ARRL.Net>
> To:<rtty@contesting.com>
> Sent: Wednesday, June 09, 2010 5:11 PM
> Subject: [RTTY] BARTG 75 RTTY Sprint?
>
>
>
>> Hi all,
>> Been some Talk and I have got Software setup.
>> QUESTION: at the 75 Baud is anyone Changing the Width of the Shift?
>> I have heard 2 Sides of this, 1 to stay at 170/200Hz Shift,
>> and another in Reading the NATO standard of 850Hz Shift?
>>
>> Jeff-N8NOE
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>
>
>
>
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