[RTTY] 200 hz filter on RTTY

[Jeff Le Fouler - F6AOJ]

I am using Frederick model 1632
a commercial / military  hardware TU 
designed in 60's  by Irvin M. HOFF W6FFC

Mark only or Space only modes are selectable from the front panel
and it works perfectly well

It is a real efficent solution when one of two frequency is hightly QRM

73 Jeff  F6AOJ


model 1632 page
http://www.f6aoj.ao-journal.com/crbst_32.html

Frederick vintage page
http://www.f6aoj.ao-journal.com/crbst_46.html

RTTY/Digital DXCC "Top List" by AD1C
http://hamradio.ad1c.us/rtty_toplist/index.php


----- Original Message ----- 
From: "Bill, W6WRT" <dezrat1242 at yahoo.com>
To: <rtty at contesting.com>
Sent: Tuesday, June 01, 2010 8:12 AM
Subject: Re: [RTTY] 200 hz filter on RTTY


> 
> ORIGINAL MESSAGE:
> 
> On Mon, 31 May 2010 22:04:15 -0500, "Don Hill AA5AU"
> <aa5au at bellsouth.net> wrote:
> 
>> I have heard
>>rumors of a modem that could actually copy Baudot 
>>hearing only one of the two tones, but this could have been a HAL myth.
> 
> REPLY:
> 
> RiTTY by K6STI claims to do that. Bryan calls it the "flywheel" mode.
> I have run RiTTY for years but I have never tried it with literally
> one tone, but it does copy very, very well. 
> 
> 73, Bill W6WRT
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