Black Cat Systems

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Radio Hobbyist Products

  22m Programmable Beacon Kit
  22m Part 15 Beacon Kit
  CW Keyer For Beacons Kit
  Jellyfish Transformer
  Cyclops Antenna Transformer

General Interest Programs

  Atomic Mac/PC
  Audio Toolbox
  Black Cat Timer
  Diet Sleuth
  Graph Paper Maker
  Health Tracker
  Image Resizer
  Knitting Wizard
  Label Wizard
  Prog Audio Gen
  Sound Byte
  Synth 76477

Amateur Radio Programs
  AirSpyHF+ Server
  Black Cat ACARS
  Black Cat ALE
  Black Cat ALE Vacuum Cleaner
  Black Cat NetFinder
  Black Cat GMDSS
  Black Cat HF Fax
  Black Cat SSTV
  Carrier Sleuth
  Cocoa 1090
  Cocoa RTL Server
  DGPS Decoding
  DX Toolbox
  eQSL Factory
  KiwiSDR Monitor
  KiwiSDR Sound Client
  Morse Mania
  RF Toolbox
  SDRuno Plugin
  SDRuno Equalizer Plugin

iPhone/iPad Apps
  Atoms To Go
  dB Calc
  Clik Trak
  DGPS Decoder
  Drill Calc
  DX Toolbox
  Elmer Extra
  Elmer General
  Elmer Tech
  Feld Hellschreiber
  Field Strength Calc
  Function Generator Pad
  HF Weather Fax
  Morse Mania
  Morse Pad
  Packet Pad
  PSK31 Pad
  SSTV Pad
  Photon Calc
  Rad Map Tracker
  RF Link Calc
  SelCall Tone Gen
  Sound Byte
  Sound Byte Control
  Spectrum Pad
  SWBC Schedules
  Synth 76477
  Synth Motion
  Transmission Line Calc
  Weather Calc
  Wire Calc

iPhone/iPad Bundles
  RF Calculator Apps
  Ham Radio Decoder Apps
  Audio Utility Apps
  Shortwave Weather Apps
  Ham Radio Exam Study Apps
  Shortwave Decoder Apps

Android Apps
  Audio Function Generator
Audio Spectrum Analyzer
DGPS Decoder
  HF Weather Fax
  Rad Map Tracker
  SelCall Tone Gen
  Sound Byte Control
  SWBC Schedules
  Wire Calc

About Black Cat Systems
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Ham Radio Software


Elmer will help you study for your amateur radio exams. Elmer is available for Macintosh and Windows systems. Elmer covers all elements, and prepares actual sample exams, which you take on your Macintosh or Windows computer. Each exam is graded, and you get to see which questions you missed, and the correct answer. After you've practiced using Elmer, you'll be all set to take your written exam!

Also available for the iPhone / iPod Touch - Click Here!

Elmer is only $24.99!
Buy your copy online, and get your registration code in minutes!

Elmer prepares you for the:

  • Technician exam
  • General exam
  • Extra class exam

I originally wrote Elmer to help study myself for the amateur radio written exams, and it has been used by thousands of others. Download a copy of Elmer today, and see for yourself!

Elmer creates sample tests for you to take. Each test is prepared from the exact same question pool as is used to generate the real ham exam you'll end up taking. Each section of the prepared exam includes exactly the same number of questions as does a real amateur exam. The new RF Exposure questions are also included, along with the relevant diagrams. So once you master the sample exams prepared by Elmer, you'll be assured of passing your written exam!

Elmer keeps track of the results of each practice test you take, so you can monitor your progress.

Elmer also keeps track of each question you correctly and incorrectly answer, and focuses on those questions you've missed when preparing new practice exams. This let's you concentrate on the questions you need additional practice with, allowing you to master the questions more quickly!

Elmer 10.0.0 is now available, and includes all the current question pools. It also includes several user interface enhancements and bug fixes.

You may also wish to take a look at Morse Mania - a morse code tutor for the Mac.
As a bonus, you can buy both Elmer and Morse Mania together for just $39.99. Be sure to buy the Combo to get the special price! (Morse Mania is only available for the Macintosh at this time)

We're so sure that you've find Elmer useful that we're offering you a risk-free deal. You can go ahead and download a copy of Elmer for absolutely free. Give it a try, and see how easy it is to use. Once you've decided that you find it useful, go ahead and register your copy. If for some reason you decide Elmer isn't for you, just throw away your copy. That's it!

Look what our customers have to say:

Just wanted to thank you for a great product! I passed my General class test this morning with flying colors! Your program was exactly what I needed. I had spent a lot of time studying the material but really needed to take the practice tests, over and over. Your program, Elmer, was *exactly* what I needed and it worked so well I'm considering studying and using Elmer to go for my Extra in a few months.
Shelley K0SHL

I just thought I should let you know... I took my exams yesterday... and passed... Technician, General... and Extra! Thanks for writing Elmer; it really helped a lot!

Passed Extra first try! Thanks again!

Email your comments and questions to

Last modified December 3, 2019