GE MASTR II High-Band UHS Preamplifier

Conversion to 220 MHz.

By M. Scott Zimmerman

 

Concept:
Make a 150.8 - 174 MHz. RF Preamp properly tune the 220 ham band.

 

Description:

The coil in the preamp is physically too long to tune the 220 ham band. To resolve this, turns are removed from the coil to make it tune properly in the 220 band.

 

Benefit:

The preamp will properly tune the 220 ham band, Circuit Q is as original.

 

Modification:

 

If you can't find an original GE preamp for use with your equipment, I have had good results at very clean sites using the Ramsey PR-10 preamp.  The PR-10 is not a better replacement, but it does work well.

 

 

 

HTML Copyrightę  5/11/2006 M. Scott Zimmerman N3XCC

All Rights Reserved.