Thanks for the crystals.
Once I designed a very low pulse-stretching video amp that achieved a -3
dB passband from 5 kHz to 430 MHz. It used 6 transistors, but the
bypass capacitors AND coupling capacitors were ALL 1.0 uF SMT chip
caps. And it worked great. Very flat frequency response as well.
So I kind of doubt the 0.01 uF caps will change much of anything. But
it would be interesting to see if more output voltage can be obtained
from the daughter board. I would think that would be the best test.
I have used series resonant capacitors in microwave power amplifiers as
well. So they certainly had some good utility, when I needed to run
high RF currents, and the chip caps were larger than the normal ones
available in those days, with much more inductance.
> Good Morning All,
> The 112.36 MHz overtone crystal for the 10m RXTXv6.2 beta kit are
> packed to be mailed today, January 28.
> Included with each crystal is a strip of twenty-two 0.01uF 1206 size
> SMT caps for use on the 10m daughter board and some locations on the
> RXTX board.
> The 0.1uF SMT caps supplied with the 10m kit pair have a 20 MHz
> series resonant frequency but still have worked satisfactorily with
> 10m kits built so far. The 0.01uF SMT caps have a series resonant
> frequency around 100 MHz so in the interest of doing what is better
> practice the 0.01uF caps are sent out.
> Recommended locations for use of the 0.01uF caps include the
> All SMT caps on the daughter board
> On the RXTXv6.2 board: C53, C54, C55, C56, C57, C58, C59, C60, C61,
> C66, C67, C69, C70 and C73.
> Please post your experience with the 10m RXTXv6.2 beta kit.
> Thanks and 73,
> Tony KB9YIG