Larry, I did use the 6BE6 as the mixer, works great! The IF amps are 6BA6 tubes, the detector is a 6BJ8(triode, twin diode), the S meter amp is a 12AU7, the LO is a 6C4, and the bfo (455Khz xtal osc) is a 6BH6.
I had problems with the 6BZ6 tubes I tried to use as IF amps and changed to the 6BA6 tubes, but likely could have got the 6BZ6 tubes to work if I wanted to play around with things for a while. Even though the 6BE6 is supposed to be a noisy mixer, using two separate grids for antenna input and LO input, the receiver is VERY quiet. Its a bit hard to get used to, when things are quiet, they are REALLY quiet, and I think something is wrong, or the antenna fell down. There is no problem using these tubes on the lower frequencies, not sure about higher frequencies... Brett N2DTS > > Brett, > > The miniature equivalent of the 12SA7 is the 12BE6. Some > characteristics > may differ slightly, but I think it's as close as you'll find. > > -Larry > > Brett Gazdzinski wrote: > > > If its not quiet, maybe I will try to duplicate the design of the > > first receiver using a 7 or 9 pin tube in place of the 12SA7. > > > > I am sure there is a tube to replace the 12SA7 in a miniature > > type. > > _______________________________________________ > AMRadio mailing list > [email protected] > http://mailman.qth.net/mailman/listinfo/amradio
