What's New?
Summer 2010
In Spring-Summer, I don't do much bench experimentation or web page updating. Time is spent adding brief content to the Junk Box web page, editing the site and answering emails. On June 8, 2010, I had 68 emails.
June 28, 2010 — Web subtitle change : Amateur Radio Electronic Design to shorten the name and reflect the site's main purpose.
Effective May 17, 2010 — 8-bit images (schematics) now use the png format. I have abandoned the gif format
May and June 2010: The pops.net net control crew rest up for the next big wind storm. The servers lost power for many hours on May 4 and June 12 due to bad weather. Severe storms arising from the Pacific Ocean threaten our AC power lines each Spring.
March 2010
Wide
Range L-C Oscillator added to Hobbyist 2010 page. Link
March 7
JavaScript
Applet K added to the QRP Tools
page
March 11
RF Workbench
Page 2 added. Link
March 15
February 2010
JavaScript
Applet J added to the QRP Tools
page
Feb 6
Editing of the
Low Noise Crystal Oscillator web
page Feb 22
RF Workbench
Page 1 added. Link
Feb 18
January 2010
Experiment #6 added to the
Hobbyist page Jan 2
New content
Low Noise Crystal Oscillator Jan 10
2 photos added
to the bottom of the
Ugly Construction web page. Jan 12
1 photo added to the
Broadband Transformers page
Jan 12
New content
Hobbyist Page 2010 Jan 13
New content:
Supplement to
JavaScript Applet G which is located on the QRP Tools
page Jan
11
Additions to
the
Low Noise Crystal Osc
page: the DSO versus CRO essay, plus 5 MHz crystal oscillator added Jan
31
JavaScript
Applets H and I added to the
QRP Tools web page Jan 31
December 2009
It has been brought to my attention that the email replies I am sending are not
compatible with some of the latest email software such as Thunderbird etc. The
reason was that I was using a homebrew email program written over 10 years
ago. It is now obsolete. A new email platform is now in place along with a
completely new email
address. Consult the email web page for more information.
Dec 30
Experiment #5 added to the
Hobbyist page
FAQ updated and edited.
Dec 30
Experiment #4 added to the
Hobbyist page
Dec 26
Experiment #3 added to the
Hobbyist page
Dec 23
What does the
output of a diode ring mixer look like in your oscilloscope? This has
become a FAQ. The question is answered in
a contribution by Wes, W7ZOI.
Big thanks to Wes for this content. Dec 22
I am very pleased to present the
Mike, KL7R Memorial Receiver Experiments.
Click here Dec 19
New bulleted list format
added to this page to improve readability Dec 19
A minor addition was added to the bottom of the
Ugly Construction web page. Flux pen
photo and text. Dec 19
Minor updates to the VFO 2008
"Stacked Toroids" web page under
Epilogue - December 19, 2009
Update to JavaScript applet
Item E: Calculate Cut
off Frequency for an RC Low Pass Filter. Now has a capacitor
range from 0.1 nF to 1500 nF.
QRP tools page.
Dec 19
Editing plus a photo added to the
broadband transformer page. This page was improved to support an upcoming
project. Dec 17
Drafting errors on
this schematic corrected (fuse position+
negative rail LED polarity).
From this web page. Thanks to
Paul, K0EET and Tom for the good eyes and their emails.
Dec 16
VFO Experiments 2009 updated again; 3 images added.
Supplemental web page
added and updated Dec 13
New JavaScript applet added to
QRP Tools page;
Item F: dBm calculator.
Dec 12
Nov 22-27, 2009
1 Hertz Precision Time Base
added to the Hobbyist Page.
VFO Experiments 2009
added
The top level
menu item "Java Tools" was renamed QRP Tools. This menu provides a
link to my Webmaster's
page and some basic JavaScript applets. Some new material will appear on the
Junk Box page during this time.
Nov 20, 2009
Finally; Fall-Winter experiments begin. A small update on the VFO 2008 web page under
A 3.5 MHz VFO for Diode Ring
Mixers was added.
The RF Preamp page was
updated with some content that was first presented on the Junk Box web
page. I have received a lot of email about these amps and decided to permanently
add them to the site.
The W7ZOI file linked on
this page is now in
pdf format.
Nov 1, 2009
The Ugly Construction web
page was augmented and re-written. 2 new photos were added. This term actually
came from Wes and Roger Hayward.
A new
Electronic Hobbyist page
was added to the drop down 2009 menu.
Oct 25, 2009
Some small updates to the Junk Box page were made. I don't ever think I have been so excited about upcoming Fall and Winter experiments as there are a number of cool, new ideas in my notebook. Extra work and travelling have kept me off the bench, but this will cease in mid November. After that, it's back to the work bench. The Fall-Winter experiments will include some HAM, SWL, general electronics and tube guitar amp experiments. Thanks for your feedback and ideas!
Oct 19, 2009
RSS feed. Click on the orange RSS icon above to establish a feed. I will only show 1 item; the latest addition of major new content to the site. Additions to the Junk Box page will occasionally be counted as "new content" and will be included on the feed.
Can anyone guess what brand of beer is in the tool box ? Yes.... its
Oct 12, 2009
Fall weather has come to Western North America! Thanks to Cor, PA3COR for debugging the JavaScript code on this page. Apps number D and E now work in Firefox. Rediscover the fun and learning of scratch homebrew electronics!
