[HBR] The long, SLOW HBR project

[Walt Hutchens]

Don wondered:

> What is the tube line-up?

Currently:

19JN8 RF/band edge marker
12DK6 local oscillator
19JN8 mixer/unused
19JN8 1st IF/bias rectifier
19JN8 2nd IF/AGC (plate detector)
12AX7 product detector
19JN8 1st audio/BFO
117N7 2nd audio/B+ rectifier

A couple of changes are in progress; I'm currently testing a completely
separate power supply for the LO so that's another tube -- you can see it in
the pictures and it's the only one that's clearly 'none of the above.'  The
mixer may change again as well.

What am I doing in this swamp?  Ohyeah ...

Walt
KJ4KV