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Bigger than a breadbox? Well not really, This set was not
only a design marvel for even the handiest wood crafter, but the unique
tube proved to be a very challenging circuit. As far as the
circuit, I owe two people all the credit that could be offered.. Dan Petersen and Mike Peebles.
They helped me put all the components where they belonged and put
the values what they needed to be. After dozens of e-mails back
and forth, a few laughs from them at my attempt, this is what we came
up with. I literally tried different values for every component,
tested and tried, what you see here is by far the best values for
the grid and tickler coil. The main tuning capacitor is a 6 gang
with all the gangs shorted. Total capacitance is actually 435pF
and the coil was designed around that figure. After the circuit
was designed and built, I had to figure out how I was going to package
the whole thing. I wanted something different and something that
no one had done before. The roll top seamed right. It took
about 2 weeks in the garage to put it all together. The
performance of this little tube is fantastic! I was able to bring
in WCBS 880 NY (500 mi.) and 870 WWL New Orlands (750 mi.) That's
only a 10kHz separation! I am not going to include any dimensions
or specifics on the components but if you want them, please email me
and I will be glad to send you anything you want.
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