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
> > >
> >
> >
> >
> > -- 
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> >
> >
>