[Yaesu] FT-1000MP MK V keying SB-220

Fri, 5 Dec 2003 09:47:14 -0800

Dave,
Thanks for the comment.  Please note that I was referring to the Yaesu
internal relay, not the solid state option that is selectable.  I did read
the manual carefully enough to note that Yaesu has conflicting information
in the paragraph of non-QSK amplifiers.  They refer to the SB220 as having
negative keying voltage, which is wrong.  And the ratings they provide are
as I state in my message.  Regardless, I was surprised that the internal
relay is rated so low that it could not key the 220.

I have keyed this amp directly with the internal relay in my (now retired)
TS940 for years with perfect performance.  It is all dependent on the
contacts of the transceiver relay involved.  So, it is not always a given...

Al

-----Original Message-----
From: Dave Edwards [mailto:[email protected]]
Sent: Friday, December 05, 2003 5:05 AM
To: Al Toothaker; Yaesu Yaesu
Subject: Re: [Yaesu] FT-1000MP MK V keying SB-220

Perhaps an SB102, or a TR4 would be happy to key the SB220 directly, but
anything that starts with TS, FT, or IC???   I thought it was a given that
you use an external relay.
....Dave
----- Original Message -----
From: "Al Toothaker" <[email protected]>
To: "Yaesu Yaesu" <[email protected]>
Sent: Friday, December 05, 2003 12:15 AM
Subject: [Yaesu] FT-1000MP MK V keying SB-220

> Just began the connections to a new MK V and find that the 120VDC from the
> relay in the SB220 amplifier
> is not compatible with the MK V relay which is good for only 100VAC or
> 60VDC.  However, the manual states it is compatible with the 220 and 221
in
> the instructions for hooking up a linear amp.
> Anyone know the real deal here?  I do now wish to fry the internal XCVR
> relay but also do not relish the thought of adding another external relay
> just to drove the SB-220 relay.
>
> Thanks for any inputs...
>
> Al, N6TA
>
>
> Moderator: Ray Brown, KB�STN
> _______________________________________________
> Yaesu mailing list
> [email protected]
> http://mailman.qth.net/mailman/listinfo/yaesu