Home of the famous L/C Meter IIB
Over 10,000 happy customers in more than 60 countries.

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My Products

Filter Design and Analysis FREE	L/C Meter IIB Inductance/Capacitance Meter.	Digital Frequency Displays Add digital readout to analog dial radios.
Design and analyze passive filters in both the frequency  and time domain.	.001uHy / .01pf resolution Automatic Ranging  Self Calibrating	Universal PROBE makes any DFD nearly plug-n-play on vacuum tube radios.
Fully assembled plug-n-play digital dials	Precision Frequency Reference 1 Hz to 10 MHz output switch selectable	Enclosure Kit Same as used for my plug-n-play digital dials.
For    Collins S line and KWM-2    Hammarlund    Kenwood TS-520S/SE Heath HW101 and SB series    Drake R4 series Atlas 210/215   Most Swan models Any DFD1 or DFD2 application	1ppm accuracy reference for Radio Amateurs and electronic hobbyists.	Used for any DFD1 or DFD2 application Sold only with a DFD or to previous customer.

Click on a picture for details

We have the best guarantee and technical support in the kit business.

Our kits are designed for easy assembly and require no special test equipment. They are "solder it together and it works" kits.

This site is dedicated to electronics hobbyists, engineers, and Radio Amateurs interested in circuit design, homebrew and kit projects.

(check out these application notes of special interest.)

Site Index .

On-line Catalog .

All my products with  shopping cart.

Paypal and most credit cards accepted

A paypal account is NOT required.

on-line or by phone or FAX

PRODUCTS

Instruction manuals for all my products in .pdf format.

L/C Meter IIB , a self-calibrating, automatic ranging inductance capacitance meter with 4 digit display, .001 uHy / .01 pf maximum resolution and 150 mHy/ 1.5 uFd. Range.

ACCURACY ANALYSIS 4/30/2010  analysis against calibration Inductor and capacitor standards.

What some of my customers have had to say.

View L/C Meter IIB Instruction Manual

Japanese Language courtesy of JA3KEV

 

German Language by DL2LUX

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Digital Frequency Displays Specifications (links to details of each type)

Miniature digital frequency counters designed to display the frequency of operation of superheterodyne (with an adjustable IF offset) and direct conversion (without offset) receivers and transmitters. Also can be used as a bench top frequency counter or built into other test equipment.

DFD1 for single conversion superhets and direct conversion radios

DFD2 for double conversion superhets

DFD3 programmable for any radio (auto-programs for most radios)

DFD4 for VHF or UHF radios or as test equipment to 2 GHz.

Which DFD should I use with my radio?

DFD Applications notes page (how to interface with many types of radios)

new universal signal probe interface

Can be as easy as sliding a tube shield over your oscillator tube (7 or 9 pin) and clipping a lead to chassis and another to the hot side of your pilot light socket.

Sold only with a
DFD1,2 or 3
or
existing customer

also see:

What some of my customers have had to say. for more pictures of customer built units.

PRICES

AADE Filter Design and Analysis . A FREE Windows filter design/analysis program. Butterworth, Chebyshev, Elliptic, Bessel, Legendre, Linear Phase, Coupled Resonator, Crystal Ladder filters. Both Time and Frequency domain analysis.Download FREE . (12 Mbytes) 

AADE has an unconditional money bank guarantee even on kits (unless destroyed during assembly). 
We have a free "we'll try to fix it if you just can't seem to get it to work" policy. ($4 return S/H charge) 
We offer technical assistance from 9AM to 9PM Pacific time. (usually available on weekends)

Plug-n-Play digital dials

using the new universal signal probe interface

C-75 display for Collins S line, KWM-2/A

C-520 for the TS-520S/SE, (can be used on plain TS-520 but not plug-n-play)

C-Hamm for Hammarlund Radios (plug-n-play using universal probe)

For the SP-600, HQ-100, HQ-110, HQ-150, HQ-160, HQ-180 and many other Hammarlund radios.

C-Drake: Digital Frequency Display for Drake R-4A/B/or C.

C-Swan for Most Swan Radios

240, 250, 250C, 260, 270, 270B, 300, 350, 350C, 400, 500, 500CX, 600, 700S and 700CX

C-Atlas for the  ATLAS 210/215

C-DFD1A for any single conversion radio including Hallicrafters, Hammarlund or National.

(crystal controlled second conversions don't count as they do not effect the math used to compute RF frequency)

C-Heath for Heathkit HW and SB series Radios

(Includes Backlit display option and cables) $150.00

You can buy the enclosure assembly, used in the plug-n-play digital dials, for any DFD1 or DFD2 application. $39.95

Sold only with a DFD or to previous customer.

(The BEZEL option is NOT used with this kit)

$7 postage, unless ordered with a DFD, then $7 for everything ($12 international)

You get the case and chassis completely machined and painted. Case is 1/8" aluminum extrusion, chassis is formed steel.	You can specify either a power module kit for DFD1 or DFD2 Contains rectifier/filter and provides power for a backlit display.

  Includes all necessary hardware. 

This, along with any DFD1 or DFD2 kit, allows you to build your own version of the plug-n-play units and save over $40,

or build a unit for any other radio that can use a DFD1 or DFD2.

 

Spacing of display, from front panel, is set for a backlit display option so that option is highly recommended.

 

Check out the assembly instruction manual.

Black case available on request.

Sorry, I do not have an enclosure for DFD3 or DFD4 which require front panel controls.

 

Buy it now using paypal

How to Recover from a Corrupted Registry that Prevents Windows XP from Starting

A simple, quick, two step process has been tested that recovers the system in under 10 minutes.

Some stuff I learned after reinstalling XP about 7 times due to corrupted registry files.  These can occur after installing non-compatible drivers or programs.  This has saved me on two or three times and restores with little or no loss of  data,   No need to reformat drive, reinstall applications, try to recover email etc.  Everything back to normal in about 30 minutes or less.

Disclaimer: AADE is not responsible for any problems, loss of data or other complaints due to using this hint.

But it has saved my A_ _ more than once.

Here is a hint my brother came up with to organize all those wall transformers for charging cell phones etc. Buy a box of 10 dual wall sockets (cheap ones) and mount them between two pieces of wood on the wall of your garage.  This keeps the cords from getting tangled.

Read antenneX review of L/C Meter IIB.

antenneX is a fantastic on-line magazine devoted to amateur radio antenna issues.

Check out
My favorite links
to Circuit design and analysis, Amateur Radio, OEM manufacturers, and parts suppliers.

TUBEPEDIA

Find out what this is and about the history of Television.	Or find out what this is.
A TV guided bomb from Desert Storm?	Is this the worlds smallest CRT?

My personal collection of cathode ray tubes.

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Design and Construction APPLICATION NOTES Deserving of special mention

Almost, if not complete, collection of GE Ham News for those who remember them fondly.     http://n4trb.com/AmateurRadio/GE_HamNews/ge_ham_news.htm

Similarily for RCA Ham Tips.   http://n4trb.com/AmateurRadio/RCA_Ham_Tips/rca_ham_tips.htm Many thanks to n4trb for his time and effort to make these available to us old timers.

A FREE Schematic drawing and Spice simulator and other interesting software from Linear Technology. Why pay for one, this one is free.

TECHNOLOGY SYSTEMS has a large collection of FREE electronics design programs.

Check out the great E-Book by Frank W. Harris, KØIYE. A Guide to Building an Amateur Radio Station

FAR Circuits Printed circuit boards for many radio projects published in  magazines such as QST, QEX, ARRL Handbook, the old Ham Radio, 73's, Amateur Radio Today, CQ, WIFB Designer Notebooks, Popular Electronics, QRPp, QRP Notebook, Communications Quarterly, Electronics Now, and others. My only commercial special mention because I like to encourage home electronic construction, for obvious reasons, and Fred makes it easy for you by supplying printed circuit boards at low cost.

The ARRL has posted it's  SMD construction articles , from QST, in PDF format for you to view, download and print. The Mystique Behind Miniaturization - Surface Mount Technology                          QST, October 1987, pp. 15-18  A Surface-Mount Technology Primer parts 1 and 2                          QST December 1990, pp. 48-51                          QST January 1991, pp. 27-30   Surface Mount Technology - You Can Work with It! Parts 1-4                          QST April 1999, pp. 33-39                          QST May 1999, pp. 48-50                          QST June 1999, pp. 34-36                         QST July 1999, pp. 38-41

A fine article describing how to do surface mount reflow soldering using a toaster oven. http://articulationllc.home.comcast.net/sm0402.htm

One of my customers Kim Sacks, KB3MZX http://youtube.com/user/RadioCtrlDWife www.optimod.fm www.optimod.am told me about this really easy way to solder smd ICs.  The ICs have solder tinned leads and, if your pcb also is tinned, then you already have enough solder.   What you don't have is solder flux.  Using a flux pen, as shown below, simply apply flux to the pcb area, position the IC and heat the leads with a clean (so as not to add any solder) soldering iron.  No solder bridges even with a fairly large soldering tip.  Shown above is a sample I did of a 28 pin SSOP chip (AD9850) on a SSOP adapter.  I got the solder flux pen on ebay but they are listed in most electronics parts catalogs.   Could not run any tests on it but examined under high magnification and no solder bridges were visible and all leads appeared well connected. Here is my DDS-60 daughter board from amQRP and the soldering tip, Hakko 900M-T-I,  I used.  The procedure works most of the time on resistors and capacitors as well.   It is wise to apply a little solder to each end of resistors and capacitors, after they have been installed,  to make sure they are connected as it is hard to tell by just looking. I tested it using a PIC-EL 2 from kangaus and it worked perfect first time out.  My first SMD project. Not bad.          I have built four of the DDS-60s and all worked fine .  The ICs all soldered no problem. I made a hold-down device for holding the parts while soldering, shown below. Cut a piece of scrap wood and drill a 5/32" hole near one end.  Mine was about 3.5" X 5" I pasted a piece of 1/4" black foam on the top.  Then bend a piece of metal coat hanger wire as shown.  Blunt the end with a file.   The foam allows any parts on the other side of the PCB to be cushioned in the foam so the PCB will lie flat.   Put the wire in the hole. It will pivot freely which is important because it eliminates the backlash (springback) of the wire. Place your PCB and component under the wire and solder it in place.

Quick and easy way to make sexy front panels and   Constructing shielded enclosure from PCB material how I packaged my version of Steve Hageman's "personal network analyzer"

Electronic Construction from A to Z , Marshall Emm's fine series of articles on "Everything you wanted to know about building stuff but were afraid to ask."

Ian Purdie, VK2TIP's fantastic web site: For amateur, ham radio, electronic project enthusiasts as well as for the electronic hobbyist and for home learning to design your own electronic projects  And Ian's new site electronics tutorials.com. lots of very nice tutorials, a must see.

Hints and Tips for prototyping with Surface Mount Devices (SMD) VK3EM'S guide for SMD construction.

Create attractive ebay.com auction pages without buying any software.

The Scientist and Engineer's Guide to Digital Signal Processing by Steven W. Smith  California Technical Publishing Covering a wide range of topics, this book is an ideal introductory text for those new to DSP, and an excellent reference for more experienced users. Begin today to learn more about this powerful technology!

Big list of tutorials from OEM manufacturers compiled by Mike Ellis of Ellis Electronics I don't maintain this list so if any links are broken I can't help.

Vectorbd files area HUGE COLLECTION OF ENGINEERING FILES.

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Send E-mail to AADE My name is Neil.