On 30 Jan 2005 at 1:13, Bill Turner wrote:
> On Sat, 29 Jan 2005 22:32:55 -0600, Charlie wrote:
>
> >The Icom site recommends an interface for "all non-Icom amplifiers"
> >but in the case of the above specs it appears to me there is already
> >a 4 volt and a 400mA "buffer" of sorts. The demands of the 80B are
> >well inside the capabilities of the 746 Pro. Right?
> ___________________________________________________________
>
> Follow the ICOM recommendations. After about six months of operation
> with a Command HF-2500, my IC-746PRO's keying relay stuck in the on
> position and I had to send it back to ICOM, fortunately under
> warranty. They returned it with a memo on how to make a
> one-transistor interface for keying. The HF-2500 keying requirements
> are 12vdc, 55 ma, well within the ICOM specs.
>
> Spend the fifty cents.
I'll put in my 0.02 as well. I had an Icom 738, and a homebrew
4CX1600B amplifier. The needs of the relay in the amplifier were
well within the specifications of the Icom transceiver. The relay in
the Icom stuck several times, but I was able to free it with a well-
placed blow to the cabinet. I put a transistor switch in the
amplifier itself, and continued to use the Icom for some years. I
have since used an Icom 756 ProII and a Yaesu FT-1000MP MkV Field
with the transistor-switched amplifier, with zero problems. (Is
"Yaesu FT-1000MP MkV Field" the longest name for a radio?)
73,
George T. Daughters, K6GT
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