[CQ-Contest] SPECIAL PREFIX OQ

[John Devoldere]

Dear DX-ers and Contesters:

Starting today, Friday, octber 26th, 2001,  you will hear many Belgian
stations on the air using the OQ prefix instead of the regular ON or OT
prefix. The Belgian telecom authorities have issued this special prefix on
the occasion of the birth of prinsess Elisabeth.

The permission to use this prefix runs until december 31st, 2001.

73,

John, ON4UN - OQ4UN
president UBA


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>From Leigh S. Jones" <kr6x at kr6x.com  Fri Oct 26 14:59:52 2001
From: Leigh S. Jones" <kr6x at kr6x.com (Leigh S. Jones)
Date: Fri, 26 Oct 2001 06:59:52 -0700
Subject: [CQ-Contest] amps in series
References: <20011025.193515.-16711039.1.k6ll at juno.com>
Message-ID: <01e001c15e26$7dc2ef60$ede3c23f at kr6x.org>


On some amplifiers there could potentially be another weak point doing
this -- the
second amplifier in the chain now has 1500 W applied to it's input
relay where
about 100 W may have been anticipated by the designer.  And,
attempting this
when using an amplifier with pin diode RF switches would be even more
dangerous
as they are rarely equipped to handle the higher power... Make certain
that the
second amplifier in the chain is equipped with an input RF relay that
can handle
the output power of the first amplifier.

The SB220 doesn't put out quite as much power as the Alpha 87, doesn't
run
full break-in, has more TVI and other harmonic output content -- and
it would be
a better investment to equip the station with two transceivers and two
amplifiers
rather than one transceiver and six amplifiers.  If you have a problem
in the
one transceiver you're out of the contest...

----- Original Message -----
From: "David O Hachadorian" <k6ll at juno.com>
To: <cq-contest at contesting.com>
Sent: Thursday, October 25, 2001 12:34 PM
Subject: [CQ-Contest] amps in series


>
> I have a spare amp, and this evening I had the bright
> idea to configure the amps so they could be tuned to
> different frequencies, and easily switched in and out
> for changing bands rapidly.
>
> I daisy-chained two amps, with the rf output of one
> connected to the rf input of the other.
>
> The two relay control lines are connected to a spdt
> switch, so both amp relays can never be on at once.
>
> By using this one DC spdt switch, the need for two
> spdt rf switches is eliminated. The only slightly weak
> link is the short piece of RG-58, inside the second amp,
> that goes from the rf input connector to the relay. It
> now carries 1500W when amp number one is in use, but no
> problem so far.
>
> I suppose I could line up six SB-220's this way, with a sp6t
> switch and have an el cheapo Alpha 87a.
>
> Maybe someone has tried this and reported on it already,
> but I had never heard of it, and it seems to work fb.
>
> Dave Hachadorian, K6LL
> Yuma, AZ
> K6LL at juno.com
>
>
> --
> CQ-Contest on WWW: http://lists.contesting.com/_cq-contest/
> Administrative requests: cq-contest-REQUEST at contesting.com
>
>


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