[GreenKeys] on-off radio teletype (not FSK)

[LEE MUSHEL]

And don't forget, very few people had the ability to "precisely tune" filters anyway so, in fact, that's how most AFSK operation took place anyway....  I used to think I was disadvantaged to have lived in that time but now I know better!

73

Lee K9WRU
----- Original Message -----
From: Dave Horsfall <dave at horsfall.org>
To: Greenkeys <greenkeys at mailman.qth.net>
Sent: Sat, 17 Feb 2018 16:57:47 -0500 (EST)
Subject: Re: [GreenKeys] on-off radio teletype (not FSK)

On Sat, 17 Feb 2018, Jim Haynes wrote:

> In the days of 850 Hz shift for hams, it was popular in TU designs to be 
> able to switch off one or the other tone and copy single tone.  The 
> reason was the tendency of CW operators to sit on one of the tone 
> frequencies to try to disrupt the operation.

Good grief...

-- 
Dave Horsfall DTM (VK2KFU)  "Those who don't understand security will suffer."
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