WHY HAM RADIO - WHY NOT CB?
YOUR FIRST RIG
HF AMPLIFIER BASICS
GROUNDED GRID BASICS
POWER SUPPLY BASICS
WHAT NOT TO DO AROUND HV!
Your First Rig
A few caveats to watch for with the Kenwood and and particularly the Yaesu line:
Any disarray should be looked on with suspicion. If a board was replaced at some point, try to find out when and why.
Turn the transceiver on and let it warm up (be sure to turn on the "hv" or "heater" switch, as well - this will power up the tubes. After it's been on for 30 to 45 minutes make a contact on each band, especially 10 and 15 meters, which are most likely to have suffered the effects of any modifications.
Watch the plate current, and after checking the operating manual, check the grid current to make sure it is within specified limits. Check each function of the panel meter.
Finally, disconnect the antenna and attempt to tune in a station on 20 meters. If you are unable to receive any signals on 20 in the middle of the day, have a shop test the unit's receive sensitivity.
Finally, if you are purchasing it from a dealer, get a warranty - even if its 30 days, it will give you the opportunity to return it for repairs if need
be. And, get a manual - preferably the original manual that came with the rig. If you are buying it from a private party, get a little information on the party your dealing with - don't assume just
because he or she's a ham that everything will turn out alright.
SELECTING A TUBE
RF INPUT CIRCUIT
RF OUTPUT (TANK) CIRCUIT
TRANSFORMER POWER CAPABILITIES
PARTS IS PARTS
ROLLING YOUR OWN - TRANSFORMERS AND CHOKES
POWER SUPPLY PROJECTS
LEGAL LIMIT AMP PROJECT