[Icom] 1. RE: PRO II relay (hot-switching) (Ed Parish K1EP)

[AA6DX]

I use QSK, for one!   My IC-736 has the W2ENY for normal amp switching.  The
amp is an Amp Supply LK 500-NTC ... runs a pair of 3-500 tubes ... worky
worky!  Interesting to those who might wonder ...Your keyer is connected to
the amp, the amp is connected to the straight key input on the 736, and then
the xcvr is placed in full-break in vox operation . I get good compliments
on the CW quality that ensues, at all speeds tried so far ... up to 45 WPM.
Now, to build an auto band switch for the amp!  73 --- Mark  AA6DX      ( C
A L L   Y O U R   M O T H E R !! )
----- Original Message ----- 
From: "Tony Hwang" <dragon40@shaw.ca>
To: <icom@mailman.qth.net>
Sent: Friday, May 09, 2003 8:14 AM
Subject: Re: [Icom] 1. RE: PRO II relay (hot-switching) (Ed Parish K1EP)


> Hi,
> I agree but better be safe than sorry. And how many folks are doing QSK
> any way?
> Any one ever thought about opto relay(solid state relay) rather than
> mchanical relay?
> Never ran an amp in ~50 years hamming, hi.
> 73,
> Tony, VE6CGX
>
> Doug Faunt N6TQS +1-510-655-8604 wrote:
>
> >   From: "Mel Martin (VE2DC)" <ve2dc@rac.ca>
> >   Date: Fri, 9 May 2003 06:57:34 -0400
> >
> >   Just can't resist adding a comment... And I've made this one before...
> >
> >   I don't agree with blanket statements that one should *always* use an
> >   external relay!
> >
> >   There is a down side... This introduces additional switching delay...
> >   Which is in itself a problem with QSK an perhaps some digital modes...
> >   I.e. Amtor... (Is anyone still using it?)...
> >   And with some rigs can also lead to hot-switching of the amplifier
> >   change-over relay...
> >
> >   If your amp can safely be switched directly, that's the best way to
go.
> >
> >
> >   Mel...
> >   VE2DC
> >
> >OK, I disagree here.  I've replaced the relay in my 756PRO now, and
> >it's not difficult, but not a plug-in either.  What I'm going to do is
> >build an external amp cable for the ACC1/2 ports using a plug-in
> >optoisolator, so that I don't have the switching delay of the daisy
> >chain, but have something fast and replaceable.  I will also be able
> >to use this cable with my IC706, using the OPC-599 or equivalent.
> >
> >I have no evidence that the ratings on the relay were ever exceeded,
> >but it's not impossible, since this radio has been on 4 major
> >DXpeditions, one without me.
> >
> >73, doug