[TenTec] mic

[John]

Thanks for all those who responded with info about the d 104 mic.  John
----- Original Message ----- 
From: "Dr. Gerald N. Johnson" <geraldj at storm.weather.net>
To: <tentec at contesting.com>
Sent: Monday, January 22, 2007 12:19 PM
Subject: Re: [TenTec] mic


> On Mon, 2007-01-22 at 00:00 -0500, John wrote:
>> I am looking at a astatic d 104 silver eagle for my Orion II .  Has 
>> anyone used this mic with this radio ?  Is this a good mic for this radio 
>> ?  thanks John  kb2huk
>
> The D-104 was made for AM with enhanced high frequencies back in the
> days when IF transformer made a receiver pass band that gently rolled
> off those highs. And the original crystal D-104 was made for very high
> impedance loads half to 1 megohm. I doubt the Orion II has nearly that
> high an input impedance. The dynamic D-104 may work with lower
> impedance. And amplified D-104 would work at the lower impedance but
> will have way too much audio for the radio.
> -- 
> 73, Jerry, K0CQ,
> All content copyright Dr. Gerald N. Johnson, electrical engineer
>
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