[MRCA] BC-659 Bias Battery

B. Smith smithab11 at comcast.net
Sun Jul 5 12:10:56 EDT 2026


A fabricated battery pack consists of 3 boards is used.One board has 5 
ea 12volt batteries (A23) in series for 60 volts. Another board has 2 ea 
12 volt (A23)batteries in series with a 1.4 (AAA) batteryfor 25 1/2 
volts and the 3rd board has 4 (AA) in series for 4.5 volts.4.5 volts 
used for audio.60 and 25 volt used for frequency control on transmitter 
and are necessary for the oscillator to lock on frequency. The single 
AAA battery in series with the  2 ea A23 batteries may not really be 
needed but I did it anyway on the first pack.
Battery holders for the A23 battery can be found on ePay or Amazon.Use a 
glue gun to secure the holders on 1/8 inch plywood.
When the set is being stored just remove 1 battery from each of the 
series packs.
Improvise-Adapt-Overcome
Z

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