HI Z Microphone

[Glen Zook]

A "hi Z" microphone usually has an impedance greater
than about 50,000 ohms.  The most common types of "hi
Z" microphones are either crystal or ceramic in
nature.

A D-104 has a "hi Z" cartridge although most of them
manufactured during the last decade or two have an
amplifier built into the stand.  Using the amplifier
works very well with the Heath gear.  I have installed
a switch that switches the amplifier in and out of the
circuit.  My Collins S-Lines don't really like using
the amplifier but all of my Heath SB-Line (and the
HW-101 is basically the same except for the fact that
it uses a "normal" VFO instead of an LMO) like the
amplifier much better (have SB-101, SB-110A, and
SB-401).  My DX-100 and Apache don't seem to like the
microphone one way or the other.

Thus, either look around for a ceramic or crystal
microphone or else find one with a preamplifier built
in.  Any of these should work fine.

Glen, K9STH


--- Todd Orme <torme at YESCO.COM> wrote:

Does anyone know approximately what impedance “hi Z”
is implying with Heathkit?

=====
Glen, K9STH

Web sites

http://home.comcast.net/~k9sth
http://home.comcast.net/~zcomco

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