Welcome to the Home Page of Chuck Adams, K7QO

This page last updated May 5 of 2012.

K7QO's NE4040 Build. [February 7, 2012]

K7QO's 15m Propagation Study. [January 25, 2012] Propagation study of 15m similar to what I did on 30m in 1995 in Dallas TX.

K7QO's SWL Debugging Documentation. [June 6, 2011] Documentation on debugging a Small Wonder Labs transceiver.

K7QO's Library. [July 6, 2011] Work in Progress.

K7QO's Books in Morse Code. Popular books in Morse Code at the speeds that will challenge you.

K7QO's PCB Tutorial. [March 10, 2010]

K7QO's Brown Brothers Iambic Paddle Restoration. [circa 2005]

K7QO's PCB Enclosure Tutorial. [March 14, 2010]

K7QO's QRP Lab Notebook. [March 19, 2012 ]

K7QO Digital Scope Tutorial.

K7QO Code Course Ordering. Go to the very bottom of this page. FISTS.ORG

K7QO's Building The SWL40+ Manual [May 3, 2009] Version 1.00

K7QO's Building The SWL30+ Manual [May 15, 2011] Version 1.00

K7QO's Pixie 2 Schematic. [May, 1995 ] Here is my version of the schematic for the PIXIE 2 xcvr. This has been ripped off without credit by several people around the web. Tell them to or put the line back in with my old call.

K7QO 15 Meter Project

K7QO's Building The K7QO--15+ [Started December 3, 2011] Work in Progress [Jan 11, 2012 is last update] Well, the project is temporarily on hold. I'm working on some electronic theory as to what to do about the front end. Several options to chose from and I'm homing in on what I want to do. Stand by. Some one will be with you shortly.

Here is new project that will develop into its own page shortly. I believe that I have the only complete set of QRP ARCI Quarterlies on the planet. Here is the start of the missing issues for the rest of the planet to enjoy. Stay tuned.

Please note that the old issues used ancient technology, so the quality is not up to today's standards. Also note that they are legal sized and I have no scanner that can handle the format, so they are copied with a lot of overlap. Be patient. I'm OCRing the copies for possible later updates to PDF format.

Vol 01 Number 1. Vol 01 Number 2. Vol 01 Number 3. Vol 01 Number 4.

Vol 02 Number 1. Vol 02 Number 2.

Vol 03 Number 2. Vol 03 Number 3. Vol 03 Number 4.

Vol 05 Number 1.

Lake Mead Water Levels

Electronic-Goldmine Project

I did this once before, but did it again just for grins. I purchased 10 G4521 solenoid coils from Electronic-Goldmine with item ID of G4521. I bought these when they were on sale for a single buck each. Such a deal. I got them for grins and I got them to do some experiments I was interested in doing, but did not want to invest a lot of money in doing. Disposable exeriments I call them. Here are a series of photos to show you how I got the wire off the item in 15 minutes without a lot of hassle. Quick and neat, but not too difficult. Just a scrap of a 2 by 4 a little over 0.5 meters long, 3 small nails with heads (important), and hacksaw to remove some of the plastic that would make removal difficult and clumsy. Enjoy. Oh. The total amount of wire was 115 meters. As you can see I measured a wire diameter of 0.011" which is an AWG #29 wire size from the chart on Wikipedia. It is only smaller by 0.001" from #28 AWG.

Electronic Goldmine Web Site. Web site where I know some radio amateurs shop from time to time. Parts come and parts go and some are one time sales. Do your homework on the stuff.

0057. Board setup for winding wire onto it.

0058. Here is the solenoid before I started destroying the structure to get to the wire.

0059. One end has the wires coming from the solenoid. Break off the wire from the connector pins.

0060. Remove the clamp holding the thing together.

0061. Remove the plastic covering the wire coil.

0062. Found a digital caliper with good batteries and with enough resolution to see that the wire is slightly larger than 0.011"

0063. The analog version never needs batteries and here we are looking at 0.0113" which is the listed size at Wikipedia.

0064. Used hacksaw to remove the ends of the plastic support feet or mounting flanges.

0065. Sanded the ends smooth to keep from hurting myself.

0066. Sanded the ends smooth to keep from hurting myself.

0067. Here I am at 10.5 loops on the nails.

0068. Here I am at 64 loops (binary number) and a half.

0069. 115 loops to make 115 meters of wire (maybe 1 count off, but who cares?). Nail to tie wire to when removing turns for experimental use of the wire.

0070. OK. Here is the end so that you can count to double check me. :-) ;-)

chuck dot adams dot k7qo at gmail dot com