[1000mp] amp keying

Fri, 5 Dec 2003 18:46:41 -0500

I have been using a newer 99 with the band-data keying of my MkV (not
using the relay that is in the MkV).  It is slicker than slick -
especially on CW.  I do have a little bit of delay programmed into the
MkV.
    It is a puzzle how Yaesu did so many things so right and yet did not
pay close attention to the keying waveform.
    Just a data point....  73   Mac  N8TT
J. Mc Laughlin  -  Michigan USA

----- Original Message -----
From: "Saad Mahaini" <[email protected]>
To: <[email protected]>
Sent: Friday, December 05, 2003 2:23 PM
Subject: RE: RE: [1000mp] amp keying


> That's true for some of the amps including some of the Alphas (mainly
> older ones), depends on the keying voltage and current.  HOWEVER, the
> new 99s, 89 and 87s are safe to key directly from the MP band data
> connector bypassing the internal relay.  The new 99 keying voltage is
> 12V and only 7ma, so its well within the 15V 100ma specs of the yaesu
> 1000MP.  I've been doing this with the 99 and 89 and its as slick as
> butter and no smoke, puffs, hiss....  With the 89, qsk is unreal with
> the pin diode switching, the 99 vacuum relay is noisy.   The older 99
> amps have 24V keying so probably better to use the buffer.  Also,
direct
> keying is not recommended with the Icom PRO2 etc which I use a buffer
> with.   http://www.alpha-amps.com/html/yaesu.htm
>
> 73 Saad N5FF
>