[1000mp] amp keying

Sat, 6 Dec 2003 09:22:20 -0600

How much is an Alpha 89 bringing these days?
----- Original Message ----- 
From: "Saad Mahaini" <[email protected]>
To: <[email protected]>
Sent: Friday, December 05, 2003 13:23
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   
> 
> -----Original Message-----
> From: [email protected] [mailto:[email protected]]
> On Behalf Of [email protected]
> Sent: Friday, December 05, 2003 10:41 AM
> To: [email protected]
> Subject: Re: RE: [1000mp] amp keying
> 
> HOWEVER.....
> 
> You should buffer the puny PTT from the MP's band data plug, or risk
> de-smoking things.  K6XX goes into this in detail here:
> 
> http://www.k6xx.com/radio/mpbandbx.html
> 
> 73,
> Blake N4GI
> 
> ----- Original Message -----
> From: Saad Mahaini <[email protected]>
> 
> > Best to use the Band data connector to key the 99, and disable the 
> > relayswitch on the back.  No clicking and super fast and smooth 
> > QSK.  Pin 2
> > and 3 to amp PTT and ground pin 8 permanently.  73 Saad N5FF    
> 
> 
> _______________________________________________
> List Moderator: Richard Lubash N1VXW
> 1000mp mailing list
> [email protected]
> To Change Options or Unsubscribe:
> http://mailman.qth.net/mailman/listinfo/1000mp
> 
> _______________________________________________
> List Moderator: Richard Lubash N1VXW
> 1000mp mailing list
> [email protected]
> To Change Options or Unsubscribe:
> http://mailman.qth.net/mailman/listinfo/1000mp