Valve Circuits 6
1. Beam Deflection Mixer
I have used the circuit below in my SB-
With careful layout the balance control and the 20p trimmer can give as much as 40dB of signal / IF suppression.
The number of turns for transformers T1 and T2 will be determined by the particular application but in all cases the push-
The SB310 has two mixers. The first one converts each selected band band to a tunable IF of 8.395 -
2. Band Pass Filter
I have developed an improved version of this filter for use with a balanced valve mixer which can be seen here.