Collins 651S1 HF Receiver

Technical data

The well know 651S1 HF receiver. This the second model.
Its differs from the first model by using a dual axis potentiometer for the AF volume and Squelch.
It includes:
- All the filters,
- LED mods.

Pictures

Front Panel
Inside
Regulator
Audio
IF Amplifier
Filter 1
Filter 2
Decoder Driver
Synth. Div.
Synth. Ref.
Synth. Mixer
Synth. VCO
Freq. Divider
Interconnect

First revision: 2023/12/31