[ADXA] Force 12 Delta 240 info needed

[Dennis Schaefer]

Thanks, Randy.  It is very similar, but I think it is maybe a Force 12
Delta-II 240 which is slightly different.  I’m going to keep the manual in
my collection, though!  I appreciate your help for a fellow ham.

Stan - thanks for the good info.  It turns out to have a coil at the center
of both elements.  They call them “hairpin coils”.  I’m aware that both are
inductors, but they confused me momentarily with their terminology.  The
reflector coil has a turn or two more than the DE coil.

He thinks is is a Delta-II 240 and has a manual now.  Even if it is a
slight variation, he should be able to get it going using your tuning
advice.

Thanks, 73,
Dennis/RZ

On Mon, Jun 1, 2026 at 8:32 AM <rcurt at centurytel.net> wrote:

> If it is Delta c-240, here is the manual for it.
>
>
> https://static.dxengineering.com/global/images/instructions/iva-dxc-240.pdf
>
>
> Randy/W5ZJ
>
> On Sun, 31 May, 2026 at 9:01 PM, Stan Stockton via ADXA <
> adxa at mailman.qth.net> wrote:
>
> To: dennis schaefer
> Cc: adxa at mailman.qth.net
> If both the driven elements and reflector are split in the center, I would
> assume that the coil would go between the two halves of the reflector and
> the hairpin would go between the two halves of the driven element to bring
> the impedance of the driven element up from some lower number to 50 ohms.
> I would reassemble it like that and raise it up about 40 feet and see what
> it looks like on an analyzer.  If it shows a good SWR too low (like below
> 7.0 MHz by about 50 khz you would probably be good to go as it will move
> higher when it is up at 60 feet or so.
>
> I’m also assuming that the elements are identical and the reflector is
> resonant lower than the DE because of the coil in the center.
>
> Stan, K5GO
>
> > On May 31, 2026, at 8:38 PM, Dennis Schaefer via ADXA <
> adxa at mailman.qth.net> wrote:
> >
> > A friend got a used Delta 240, which is a two element 40M yagi.  It is
> disassembled and has a hairpin and a small coil, obviously for element
> centers.  He isn’t sure which goes on the DE and which goes on the
> reflector.
> >
> > This is the one with the encapsulated loading coils.
> >
> > A manual copy or any help would be appreciated.
> >
> > This is for Les, KI5GTR.  He hasn’t been licensed all that long and is
> mainly CW contesting.  He made 1197 Q’s in WPX and I think he was
> practicing with Morse Runner at 37 WPM.  I’m trying to get him interested
> in DX’ing.
> >
> > 73,
> > Dennis/RZ
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