[1000mp] FT-1000 with Heil PR-40

[Harold Mandel]

A while back, in considering an audio system for 
long-range SSB signal intelligence my top choice
was a good carbon-button mike with a true battery
bias voltage source to eliminate hum, and a simple,
12AX7A microphone preamp with an unbalanced
transformer input and transformer output matching the
mike and radio.

This would give the optimum voice frequency range
while eliminating overtones, harmonics and sub-harmonics.

The problem was that I sounded like Rudy Vallee singing
through the old megaphone and people would make themselves
crazy, spinning the RIT trying to find the HiFi setting.

  Hal Mandel, W4HBM
 
-----Original Message-----
Subject: Re: [1000mp] FT-1000 with Heil PR-40

Oops.  It has been pointed out to me that I got the filters backwards. 
The 250 Hz was a high pass and the 3400 Hz was a low pass.