[HBR] A Homebrew design that is rarely mentioned

[Ian Wilson]

This is a very interesting read, thank you Walt.

I compared the mixing schemes with the SX-146, which has the following specs
for "in-band tweets": less than 0.25uV equivalent CW except for 1uV at
21.33Mc.

The SX-146 also uses a 5-5.5Mc VFO and 9MHz IF. In contrast to the W5OMX
design, it does no premixing on 80m and 20m. For 15m and 10m the mixing
scheme used by both receivers is the same. For 40m the SX-146 uses a 21.5Mc
xtal while the W5OMX uses an 11Mc xtal.

I haven't worked out the combinations but this means that the SX-146 tunes
some bands backwards and has LSB/USB switched between 80m and 40m.
But that's probably not a bad price to pay if the birdies are minimized as
a result.

Is the tuning drive used any more available than that in the HBR?

73, ian K3IMW