Re: GEC BRT400 receiver.
The RC410 I had was one of the prototypes.
I had it running with all the cascaded switches and their Geneva-wheel linkages working freely. Operation was very unreliable due to tracks cracking on the warping SRBP boards.
I toyed with the idea of making FR4 boards and transferring the parts across, but the tediousness of tuning convinced me to save my effort. Nice filters, awkward AGC. Pig to tune - only 100Hz steps if you kept using the clunky push-pull tuning speed 'gearchange' and you always had to fiddle the fine tune pot. Nice filters.
A receiver for sked working, not for hunting around.
I also had a Marconi H2900 which was worse! Sosin's Folly they called them.
David
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Can't afford the volcanic island yet, but the plans for my monorail and the goons' uniforms are done
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