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Date: | Mon, 31 Dec 2007 18:36:38 -0500 |
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Perhaps so, Collin but, for some reason, all the schemes I've seen for doing
this have involved a small op amp circuit. Many guys built them into the
base of the microphone. Lou
----- Original Message -----
From: "Colin McDonald" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Monday, December 31, 2007 6:26 PM
Subject: Re: more ts830 for Lou
> can you use a step up audio transformer to increase the impedance to the
> microphone from the radio?
> I am guessing the 830 likes to se a 600 ohm microphone attached, so an
audio
> transformer stepping up to around 1meg ohm might make the D104 play a
little
> better.
> I would think you could accomplish this with some sort of Pot and resistor
> combination instead of of an OP amp.
> 73
> Colin, V A6BKX
> ----- Original Message -----
> From: "Lou Kolb" <[log in to unmask]>
> To: <[log in to unmask]>
> Sent: Monday, December 31, 2007 2:43 PM
> Subject: Re: more ts830 for Lou
>
>
> > Thanks Keith. I have the rig now and am getting used to it. Lots more
> > knobs than the 440 but it's working well. I'm using the 25 khz
calibrator
> > and It's amazing how spoiled you can get by direct frequency input and
> > audible frequency readout. But the receiver sounds great. Transmit
audio
> > reports have been good too. What I'd like to do with this rig is get a
> d104
> > with one of thos op amp modifications so the mic is properly matched.
The
> > D104 likes to look into at least a megohm and when it does it sounds
quite
> > good, not the scratchy sound most folks identify with it. Lou
> > ----- Original Message -----
> > From: <[log in to unmask]>
> > To: <[log in to unmask]>
> > Sent: Monday, December 31, 2007 9:16 AM
> > Subject: more ts830 for Lou
> >
> >
> > > Further to my message of yesterday, I forgot to mention that, if you
> > > have the original tuning knob, then each turn gives you 25 kcs.
> > >
> > > At the ends there is a definite stop so you cannot turn the knob
> > > beyond that point so you will see it is easy to count and get close to
> > > the wanted frequency.
> > >
> > > Keith
> > > gw4nby
> > >
> >
> >
> >
> > --
> > No virus found in this incoming message.
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> > Version: 7.5.516 / Virus Database: 269.17.13/1204 - Release Date:
> 12/31/2007 12:20 PM
> >
> >
>
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