Exactly, In fact there are a couple things wrong with what he said.To start
with many SS rigs have a mic input impedances in the hundreds of ohms , or a
few K at most,not 100K's Short of it is connecting it to a rig with a lower
input Z tends to flatten out the response, so you probably end up with a
pretty decent SSB mic as well as a terrific AM mic when operated into hgh Z.
In fact some of the old crystal mics had a response control, which was
nothing more than a switch for a shunt resistor.
W6RD
----- Original Message -----
From: "N4NT" <mike_n4nt@embarqmail.com>
To: "Discussion of Ten-Tec Equipment" <tentec@contesting.com>
Sent: Friday, November 16, 2007 12:13 PM
Subject: Re: [TenTec] Using a comptuer microphone with a Triton 4 (544)
This is absolutely untrue in my experience. I have compared microphones
on
the Triton 544 and ALWAYS the listeners prefer the D-104. Folks who know
me
in person say the D-104 has the best representation of my voice. Based on
my experience, the D-104 is FAR from being a crappy microphone!
73, Mike N4NT
----- Original Message -----
From: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
To: <tentec@contesting.com>
Sent: Friday, November 16, 2007 11:36 AM
Subject: Re: [TenTec] Using a comptuer microphone with a Triton 4 (544)
The D-104 is a crappy microphone for SSB, always has been. It has a
rising characteristic intended (in the 30s) to emphasize the highs at
the transmitter that were rolled off in the typical AM receiver IF
selectivity that had a very rounded pass band. Further the crystal and
ceramic D-104 were designed to work with a very high impedance load for
solid state, preferred load a megohm. Today a high impedance solid state
audio input impedances is likely to be under 100K. That load on a D-104
changes it from rising to peaked and falling, makes it sound muffled. It
it still had the rising characteristic with the solid state input Z, it
can overdrive audio and balanced modulator with audio components
rejected by the SSB filter unless in super wide SSB mode which draws a
lot of fire on the bands.
Yes, I have a D-104 (case) hooked to my Corsair II. The cartridge is a
Shure limited bandwidth communications element no longer made.
73, Jerry, K0CQ
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