--- In ham_amplifiers@..., "pentalab" <jim.thomson@...>
wrote:
--- In ham_amplifiers@..., jmltinc@ wrote:
In the VHF/UHF Handbook, chapter Receivers, Transmitters And
Transceivers ,
section, 'Tuned Circuits'; the author writes: "If discs are
used,
the
capacitance varies in a very non-linear manner with the distance
between them.
It is: C(pF) = 0.00885 x Area (sq mm) / Spacing (mm)"
The equation for capacitance vs area vs spacing is linear.
What's up?
John, N9RF
########### Congrat's... u just found ur 1st mistake. If this is
orr's latest blue book..... which page is it on ??? I found 38
mistakes in it so far.. mainly typo's.... have not got to the
vhf/uhf stuff yet.
Jim
### You double the spacing between any two plates... and C
drops
to just 1/4 of the original. [ V rating doubles].
### conversely... u reduce the spacing by 1/2 the original...
and C
increases 4 x [V rating drops in 1/2]
later... Jim
