Vintage Equipment and Related Articles
   Transmitters
T/R Switches
Receivers
Sideband Rigs
Heathkit SB200 fan
Heathkit SB200:
Soft Start, ARC protection, 572B replacement, MODS
Testing Input SWR of Grounded Grid Amplifiers
Heathkit Warrior T/R

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THIS INFORMATION IS FOR LICENSED HAM OPERATORS. DO NOT TRANSMIT WITHOUT A LICENSE. SEVERE FINES AND/OR JAIL TIME ARE IMPOSED ON ILLEGAL OPERATION. FOR LICENSING INFORMATION, SEE:

http://w5yi.org/
http://www.arrl.org/

BEWARE OF THE LETHAL VOLTAGES INSIDE YOUR EQUIPMENT!

EVEN EXPERIENCED AND KNOWLEDGABLE TECHNICIANS HAVE GOTTEN CARELESS AND BEEN KILLED WORKING ON VACUUM TUBE EQUIPMENT. EVEN SOLID STATE EQUIPMENT CAN KILL YOU IF YOU DO NOT KNOW THE SAFETY PROCEDURES.

DO NOT WORK ON YOUR RADIO GEAR UNLESS YOU ARE REALLY SURE OF ALL THE SAFETY TECHNIQUES REQUIRED. THESE INCLUDE, BUT ARE NOT LIMITED TO:

  • DISCONNECT THE POWER CORD WHEN WORKING INSIDE.
  • DISCHARGE ALL FILTER CAPACITORS.
  • BE CAREFUL HANDLING TUBES, ESPECIALLY THE PLATE CAPS.
  • REMOVE FRAGILE COMPONENTS WHEN SERVICING, AND STORE THEM SAFELY TO AVOID DAMAGE.
YOU ARE RESPONSIBLE FOR THE DECISION TO MODIFY YOUR EQUIPMENT, AND NO LIABILITY IS ASSUMED MY ME OR ANY OF THE LINKS I MENTIONED. THE SOLUTIONS PROPOSED MAY NOT BE APPROPRIATE FOR YOUR RADIO SYSTEM.

PLEASE DO NOT COPY THIS PAGE WITHOUT CREDIT TO ME. IF YOU WANT TO LINK TO IT, I WILL UPDATE THE PAGE FROM TIME TO TIME AS I GO FORWARD WITH THE OTHER WORK. IT WILL BE TO YOUR ADVANTAGE TO HAVE THE LATEST INFORMATION.