Radio Ramblings

The latest version of Tony Parks’ Softrock is soon to be released.  The first reviewer said:

> Realizing the drawbacks of the “aliasing” using no filter it was sure
> a lot of fun jumping from 80M to 40M to 20M with just the DIP switch
> freq select. Of course “you” shouldn’t do this but I ended up using
> it this way for several days as my “main” receiver :))

My immediate thoughts on reading this are why not just send the output through a pair of analogue multiplexers like the 74HC4051.  This has <1dB loss at 30MHz.  The antenna would be connected to the common connection of the first multiplexer.  The 8 selectable lines would go to 8 different filters, which would then go into a second multiplexer.  The control lines of both muxes would be linked together, and connected to either the band selection switch or to outputs on the PIC.

I think I’ll have to order some of the v8.1 kits when they’re available