[Milsurplus] TCS-9 Output matching?

[WA5CAB at cs.com]

I will add, though, that the circuit in the TN-233, and for that matter the 
one in the A-58 that Roger and I have, aren't traditional Phantom Antennas. 
In that you cannot use them to retune the transmitter to a new frequency 
under radio silence conditions. The idea behind the Phantom Antenna was that 
you could load and tune the transmitter to several separated by frequency 
channels. And on each one, switch to the Phantom Antenna and tune it to get the 
same readings/results on the transmitter. And record the setting(s). The 
A-34, A-62, A-82 and A-83 are such units. Not that I have ever seen one of the 
first or last units. With one of them, although the accurancy isn't great, 
you can set the controls to the recorded ones and retune the transmitter to 
it and expect to put out a decent signal later to the real antenna.

In a message dated 5/5/2011 10:01:21 PM Central Daylight Time, 
jmfranke at cox.net writes: 
> --------------------------------------------------
> From: <WA5CAB at cs.com>
> Sent: Thursday, May 05, 2011 10:23 PM
> To: <milsurplus at mailman.qth.net>
> Subject: Re: [Milsurplus] TCS-9 Output matching?
> 
> >The phantom antenna in the TN-233/SRC is 12.5 ohms in series with 100 uuf
> >for 3-12 MC (Band 2 &3) or 12.5 ohms in series with 300 uuf for 1.5-3 MC
> >(Band 1). Presumably 200 uuf would work better between 3 and 4 MC but the
> >selector switch only has two positions for the capacitor choice.
> >
> >In a message dated 5/5/2011 6:49:17 PM Central Daylight Time,
> >jmfranke at cox.net writes:
> >>I hear this a lot, but is it 11 Ohms in series with 300pF or 11 Ohms in
> >>parallel with 300pF. I would assume parallel, but I could be wrong.
> >>
> >>John WA4WDL
> >>
> >>--------------------------------------------------
> >>From: "Roger Basford" <Roger at new-gate.co.uk>
> >>Sent: Thursday, May 05, 2011 3:15 PM
> >>To: "Mike Feher" <n4fs at eozinc.com>
> >>Cc: <milsurplus at mailman.qth.net>
> >>Subject: Re: [Milsurplus] TCS-9 Output matching?
> >>
> >>>Hi Mike,
> >>>
> >>>The recommended test load for the TCS TX is about 11 Ohms and 300pf
> >>>capacitance, so a balun as you describe would probably work OK. I'll
> >>>have a look in the Handbook for a suitable design.
> >>>


Robert Downs - Houston
wa5cab dot com (Web Store)
MVPA 9480