Softrock Lite 6.2
Adventures in Electronics and Radio
Elecraft K2 and K3 Transceivers
November 2010 Archive
23 November 2010
I have a new kit�an AM broadcast band high pass filter,
the Z10022A. I've added a page for the Z10022A, viewable by clicking
The Z10022A is a receive-only 9th
order 1 dB Chebyshev high pass filter with a nominal cutoff frequency of 1800
KHz., is intended to be used to prevent a shortwave receiver from overloading
due to strong signals from AM broadcast band (Medium Wave) in the 530-1700 KHz
Frequencies below 1800 KHz are
suppressed by the Z10022A.
The Z10022A is a less expensive solution for AM band
overload than the Z10020 band reject filter. The difference between these two
filters is that the Z10022A does not permit reception below 1800 KHz, while the
Z10020A allows reception below 500 KHz and above 1800 KHz.
20 November 2010
November has been a busy month, with meeting orders for
Clifton Laboratories products and developing new kits. At the moment, I'm
waiting on prototype printed circuit boards for three new kits, and enclosures
for a fourth kit. More information on these new products when they are closer to
being ready for sale.
I've also added a new page to the site, relating how an
HP4342A Q-meter (or other similar Q-meter such as the Boonton 260A) might be
used to measure the Q of an inductor beyond the normal scale limit, 1000 in the
case of the HP 4342A. The page may be read by clicking
02 November 2010
I've completed a first pass at laying out printed circuit
boards for the next major kit�the Z1300A antenna distribution amplifier.
I'll have more details when the project is closer to
completion. I have a set of printed circuit boards on order, but there's a lot
of work remaining, mostly relating to the mechanical side of things such as the
The design is highly modular and configurable to meet
specific purchaser desires. In the minimum configuration, it's one input, 4
isolated outputs. In the maximum mode, it's 4 switchable inputs, 8 outputs and a
couple other bells and whistles to be revealed later.
02 November 2010
As usual, the prior month has been moved to an archive
page, readable by clicking here or via the
navigation table at the top of the page.