[RTTY] Amtor

[Bill]

I dunno about that. I worked and confirmed well over 100 countries back 
in the 80's. There was a .25ms turnaround time that always seemed to 
work no matter the distance. It was always a subject of discussion. I 
was always amazed to get a comment from a DX station like "Your my first 
US QSO"!. The DX stations flocked to it for the uniqueness back then, 
much they way they do today to new modes, like JT-65. The way  the 
station suddenly started pulsing seemingly by itself, was a very 
exciting thing.

I remember working several mailboxes back then because it was so new. 
Don was right about ST2AA being a regular and workable most days.

Packet was terrible for HF but some went to it and then Pactor came 
along. New modes always seemed to excite and after a few years Amtor 
QSO's disappeared. It was always perfect copy all the time because of 
the "handshake". Handshake meant the two stations were linked and 
talking to each other. Like we weren't even there.

Oh well, another time and another place.

Bill Marx W2CQ




On 4/29/2011 6:52 PM, Bill, W6WRT wrote:
> ORIGINAL MESSAGE:
>
> On Fri, 29 Apr 2011 13:49:13 -0700, Kok Chen<chen at mac.com>  wrote:
>
>> Not many software modems implement Amtor.
> REPLY:
>
> And it's just as well. AMTOR has one fatal flaw for DXers: The original
> designers did not take into account how long it takes for a radio wave
> to go halfway around the earth and back. AMTOR's "turnover" function is
> too quick. If you want to try kind of mode, PACTOR is much better in
> this respect.
>
> 73, Bill W6WRT
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