Choosing a Radio to Convert    Information provided by NHRC's GE Mastr II Infosite.

GE Mastr II Nomenclature   What the #'s on the radio set mean.

Before you Start:    Some General Information.

Modify the Mastr II Systems Board for Full Duplex

Full Duplex Conversion   Information provided by NHRC's GE Mastr II Infosite.

Where to get the radio's signals:   PTT, Cos, Audio, Channel Guard (PL) etc.
 

Exciter Re-Alignment
VHF Exciter Alignment
UHF Exciter Alignment   (Silver handle high-band exciter model.)

Complete Alignment of the Brown Handled UHF unit
Brown Handled UHF Unit

Elimination of spurious emissions:  (in early Mastr II PA decks)

Duplexer Tuning Information:

Additional Notes:     Added by users of this site.