BC-1G Modifications & Changes

 

General

 

Step-Start  DELAY circuit installed for 833A filament transformer

 

Step-Start CIRCUIT installed for HV turn on

 

Power level select changed to allow SINGLE SWITCH selection of 1 KW, 500 Watts, or 250 Watts

 

Time Delay relays for LV and HV application changed to SS TD relays - filament TD relay in upper left of photo

 

Existing remote control board MODIFIED to allow more conventional TX PTT function and RX muting

 

Coaxial antenna RELAY installed

 

 

Frequency Conversion

 

Oscillator/buffer assembly modified for use with external VFO

 

2nd Oscillator unit acquired with one being retuned for 160 and the other MODIFIED for use on 75

 

Driver coil RE-TAPPED for 160 and 75 meters and driver band-switch installed

 

FINAL AMPLIFIER changed to conventional Pi output

 

Fixed mica capacitors in PLATE tuning and LOADING reconfigured/added/replaced to allow strapping changes to reduce capacity by 1/2 for 160 meter operation and to reduce it by 1/2 again for 75 meter ops

 

Cheap and simple TURNS COUNTER 

 

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