[TenTec] Re: D-104 wired for TT, wiring & ops suggestion

[Bill Fulling]

Hi Mark,
I use a D104 with my Jupiter,but had to do the following mods to it to get
it to fly(the D104 worked gud with my old Scout,not so hot with the Jupe).
1. If ur D104 is the unamplified type,build a FET preamp in the base of it
to match the impedeance of the xtal element in the mike(abt 1meg input).
2.Get a Heil XT-1 matching xfmr and wire it in REVERSE in this amp ckt-the
Hi Z winding is used as the load for the drain,the Lo Z winding is used to
match the input of the Jupe(or Peg in ur case).Works like a champ.
3.Any questions,yack at me off the reflector site.
73 de Bill W4NJF

----- Original Message -----
From: "W4CHLTenTecEl" <eu5q2f402 at sneakemail.com>
To: <tentec at contesting.com>
Sent: Wednesday, January 14, 2004 1:59 PM
Subject: [TenTec] Re: D-104 wired for TT, wiring & ops suggestion


> I have had a D104 and the TUG amp base sitting around waiting to be wired
up, what wiring has been successful for you to 4 pin TenTec ? This is for a
Pegasus, but that is perhaps irrelevant.
>
> We have a second D104 without the amp, do I understand correctly that we
should avoid a D104 without amp (or some matching circuit) due to impedance
mismatch ?
>
> Sold a D104/TUG amp base that was already wired up with a prior Pegasus,
we have been hooking them developing control program from a Cybiko PDA and
really only needed one !  If I did note the wiring on that mic, I misplaced
it.
>
> Kids get a kick out of the D104 mic & stand, some nostalgia perhaps using
the old mics as compared to the very functional TT 1201 (kit version of 706
mic).
>
> Cheers & 73 de Mark W4CHL
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