[TenTec] using the D-104 on the jupiter or triton IV

[Robert & Linda McGraw K4TAX]

That's because the input Z of the audio circuit {Jupiter or Triton} loads 
the mike element and away go the lows.  The input Z of these radios is in 
the order of 100K ohms or less.  The original D-104 mike needs to see a 
input Z of something greater than 1 to 4 megohms.  Now, if one has the G 
stand with the amp, basically an impedance converter, then it will drive a 
low impedance input circuit without degradation of the frequency response.

Some have had success by using an in line matching transformer but my 
experience is that humm is a concerning factor with the transformers at 
these very low signal levels.

The G stand with the amp in the base is the better solution.  Be careful and 
not get the gain too high on the amp in the base thus overdriving the input 
stage of the radio.  No amount of mike gain reduction on the radio will 
correct the problem as the mike gain is after the first stage of 
amplification.

73
Bob, K4TAX


----- Original Message ----- 
From: "Mike Bryce" <prosolar at sssnet.com>
To: <TenTec at contesting.com>
Sent: Monday, December 26, 2005 6:39 PM
Subject: [TenTec] using the D-104 on the jupiter or triton IV


> hola...
>
> anyone have any success using the D-104 on either the jupiter or triton
> IV?
>
> I get reports of way too many highs and zip bass....
>
> mike
>
>
> Mike Bryce, WB8VGE
>  the heathkit shop
> SunLight energy systems
>
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