----- Original Message -----
From: "Ronald Hands" <rhands@mountaincable.net>
To: "Discussion of Ten-Tec Equipment" <tentec@contesting.com>
Sent: Sunday, February 07, 2010 1:26 AM
Subject: Re: [TenTec] Old vs New = crunch time
Dr. Gerald N. Johnson wrote:
But that relaxation oscillator has one good feature. It starts and stops
fast, so it doesn't hang behind fast keying. A low pass filter on the
speaker can help it a lot. I'll have a circuit that I did over 20 years
ago up on a web page in a while.
It probably achieves the same effect as my MFJ DSP filter (I think it's
a model 784b), which does a terrific job of smoothing the Corsair II
side tone and also adds other bells and whistles such as selectivity and
heterodyne deletion. I've heard others complain that their outboard DSP
units introduced a disconcerting amount of delay in the side tone
signal, but I didn't notice that effect with the MFJ, even when using a
keyboard. The MFJ unit also boasts very robust audio. That I was able
to buy it secondhand at a very attractive price also added to its charm.
-- Ron
VE3SP
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