I built a BC band convertor for my BC348 receiver, that doesn't have a BC band.
It was part of a gutted Zenith clock radio. It used the first IF transformer and all the original osc and mixer circuitry. I only had a small 12avc transformer, for a power supply. The 12BE6 worked well with voltage doubler that furnished about 28-30 vdc.
I tuned the receiver to 455 on the 200-500KC band and it seemed to work very well.
