[GreenKeys] RE: [MMTTY] ve2lx reason for 2125 rtty freq

[Veenstra, Lester]

Yes, this the a description of Byrons (W2JTP) unit published in CQ and
the "New RTTY Handbook" we all started with.

Lester Veenstra
Senior Engineering Program Manager
Intelsat General
6550 Rock Springs Drive, Suite 450
Bethesda Maryland, 20817
+1-301-571-1212
e-mail: lester.veenstra at intelsatgeneral.com
 

-----Original Message-----
From: jhhaynes at earthlink.net [mailto:jhhaynes at earthlink.net] 
Sent: Friday, July 29, 2005 12:36 PM
To: Veenstra, Lester
Cc: MMTTY at yahoogroups.com; greenkeys at mailman.qth.net
Subject: Re: [GreenKeys] RE: [MMTTY] ve2lx reason for 2125 rtty freq


jhhaynes at earthlink dot net

On Thu, 28 Jul 2005, Veenstra, Lester wrote:

> there is another twist to this story. In the beginning, there were
> available 425 Hz tuning fork audio frequency standards from commercial
> terminal equipment , (this is part of my folklore although I have not

I'm not aware of those - however there were some home-built tuning fork
frequency standards described in the literature.  I recall there being
a source of 435 Hz forks (which I think was once the orchestral pitch
for A, before they went to A-440).  If you had one of these you could
use
a rattail file on the bottom of the U in the fork and get it down to
425.
Then you had to mount the fork in a base of some kind and affix 
transducers, perhaps taken from an old headphone.