====== Ten-Tec Model Number Coding ======
**From the Ten-Tec Reflector November 1, 1999**

  * 200's are for accessory items - antenna tuners, filters, dummy loads, etc.
  * 300's we have used for "connecting" items - cables and remote knobs.
  * 400's are linear amplifiers
  * 500's are transceivers
  * 600's are keyers and keying devices
  * 700's are microphones and SSB related devices.
  * 800's Scout modules 
  * 900's are power supplies

Over the years, a few items have strayed from this (like the use of 200 series numbers for older power supplies/mics) but it has been fairly consistent for the last 10 years or more.