Radio W4KAZ

Thanks for stopping by the virtual KazShack. Feel free to comment - I often approve them.

Skimmer Notes

Created a page of links and several related pages of information on the ongoing construction of the CW Skimmer station at W4KAZ.

Because of the nature of the blog package used for this website, it is easier to save this skimmer related info on ‘pages’ rather than as a “post” because it seems like [...]

Softrock Lite II

After some large amount of initial interest, I quit paying attention to the Softrock.  As the years trickled by, the Softrock project kept moving.  Lots of projects, mods, versions, and changes.

Here in the present, I had an older Softrock v6.2 sitting on the ‘ToooDooo” batting lineup since around December.  It had originally been [...]

Rocky rocks softly

After a lot of procrastination, the dormant Softrock v6.2 project became timely.  The job was to convert a Softrock v6.2 from its intended IF usage(IF 9.001?) to something a wee more interesting fer the KazShack main op, namely a 40m Softrock v6.2.  The WB5RVZ pages are the place to go for build information.  A [...]

The Evolution of a 160m Inverted-L(long version)

(Updated 02/28/2012 de w4kaz)

TopBand?  Wazzat?

The whole idea of operating on 160m started as curiosity.  Before 2005 I had never operated on 160m.  Ever.  I had listened some, but never keyed the transmitter other than to experiment with arcing capacitors and high levels of SWR.  But it generally seemed like it would be [...]


Put together a WinKeyer2 in a couple of hours two weeks before Field Day. This accessory was added as part of the plan to have the SO2R station capability operational with either USB or serial ports on the logging computer.  I chose the version with a serial port, and plan to use it with [...]

Home Brew SO2R Box

This home brew SO2R controller project follows the “old-n-busted” theory, and is based on the design by N6BV in the ARRL Handbook, as well as some input from K4QPL. In summary, it is built around the use of an LPT port for computer control of the CW, PTT, Radio A/B, and band data. As [...]

W7IUV PreAmp in RX System

After building the 80m/160m splitter, it seemed like the signal levels from the K9AY were down a bit, probably from losses in the filters.  So after looking around at pre-amps, and procrastinating on buying the Ar2 preamp, I again landed on the W7IUV site.

W7IUV has updated his preamp schematic, and it looked easy [...]

Small Parts List

Some suitable and inexpensive parts for future projects. A continuing aggregated list of Stuff I Use To Play Radio.

Small signal DPDT relay: (For K9AY et al, & 12v control switching) Axicom V23105A5003A201 ??AZ822-2C-12DSE?? Data Sheet C934/MT2 Relay Series(200mw coil, DPDT, 12v) TYCO MT2 Series #3-1462000-7 (12v, 1.5A DPDT) Omron SPST…..omron-g6e-134p data sheet. [...]

RX Antenna 160m/80m Band Splitter/Switch

edited and amended11/02/2009, kaz

Here is a small project that will work along with the K9AY RX antenna, and solve a minor SO2R problem in the KazShack.

Currently theK9AY feedline comes into the KazShack directly to the RX input for one of the transceivers. I wanted to have a way to share the antenna [...]

BPFF – Guess-timating the Filter Efficacy – Part 5

Part 5 of the W4KAZ filter project series discusses filter losses, an idea for getting a very rough S-meter calibration, and trying to estimate the out of pass band attenuation provided by the filters.

The Losses:

The filters do have losses in the pass band. This is known as the insertion loss, and is [...]