Initial inspection of a EF Johnson tube type Ham AM/CW transmitter. This one is a factory build unit. There was evidence of a cobbler playing around inside. Lucky, all was easily reversible. Obvious hazards and Power supply issues were corrected. Controlled start up is a must. Never just plug one of these transmitters in without making sure it is safe to operate. Always use a variac that has an amp meter so you can monitor for current spikes. Plus, keep in mind, high voltage is present. Approaching these without proper training could result in "lights out"! So be careful.
10 фев 2024
