Exray's Lacault Ultradyne Superhet Project.
Page Two
Next I rewired the set with 1/16th inch brass rod. It really
looks great and the wiring is much more solid than with the #16 tinned
copper.
I've changed and added rheostats to where I now have full independent
control of the IF amp stages, the detector and the audio stages.
The potentiometer also controls the bias on the IF amps. I
wondered if all that would be overkill and I really don't think
so. Each seems to be worthwhile in some scenario of signals,
strong vs. weak, in controlling volume and minimizing distortion.
This rheostat is worth noting. Alan D provided me with this
Cutler-Hammer type with a vernier control. It begged to be
utilized and I installed it as the detector rheostat.
A front panel voltmeter was added...just for the hell of it. Its
a dual range type and
reads the A and B source voltages. I don't have any ambition of
running the set off of batteries but its kinda neat to have in place.
IF transformers are being changed to original Ultraformers
which are 120 kc units. Thats going to require some new tweaking
and setting the oscillator range.
After all that was done I removed the entire assembly off of the
breadboard. With the brass wiring everything stayed in place
perfectly. The board was finished off with lacquer.
Updated 15 January
2006
