When you take disconnect the BNC jumper the 320 ATU will not
work on a dipole (dipole needs to be cut to length )
73
?
From:
Racal-manpacks@... [mailto:Racal-manpacks@...] On
Behalf Of Military1944@... Sent: 23 September 2010 08:52 To: Racal-manpacks@... Subject: Re: [Racal-manpacks] PRC320 and dipole?
In a message dated 22/09/2010 19:58:42 GMT Daylight Time,
iain@... writes:
Feeding the dipole with coax from the transmitter output BNC is
the correct
way to do it - the operator is expected to roll up or unroll the dipole
ends for best match.
: The trouble there Iain is that there no way of knowing the match
as the metering is not in circuit,the manual states using the BNC and I guess
they (the mil) must have just accepted the slight mismatch etc, after all, even
a diploe cut for say 14.200 will be off at 14.250 so I think we just need to
accept it.
There was a thread on the clansman_larkspur group a
few months ago about using the ATU for a dipole (with one leg connected to
case ground and one to the antenna terminal) and I seem to recall that the
conclusion was that a series capacitor of a few 10s of pf and a suitably
high voltage rating between the antenna terminal and that leg of the dipole
helped it match.
: Thats interesting as the mnual makes no mention of adding a cap,
and none is carried in the kit, unlike the Ws19 cap unit.
?
Anyway, out portable next week, will have a play, hi.
?
cheers, Ben.
?
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