AIR VARIABLE CAPACITOR KITS
On 01/17/14 16:00, Michael Black wrote:
On Fri, 17 Jan 2014, Zach Metzinger wrote:
You could also dispense with the mechanical capacitor completely and
use a varactor diode tuned by a voltage. I've even seen some designs
use a regular LED reverse-biased in a pinch.
But, there will always be a time when you can't come up with an
alternative. High voltage variables for transmitting loops, or output
circuitry in a transmitter. Varactors won't work in that situation.
And that's when you'll need to make variable capacitors. At the best of
time those weren't readily available (likely requiring a special order)
and were relatively expensive. Now, they are outright expensive, if you
can find them.
Michael VE2BVW
Michael-
Excellent point, and I sit corrected. I need to read more closely next time!
DE N0ZGO
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