01-15-2020, 10:36 PM
Find what the tube is. (6A3).
Find the datasheet for it. As a quick reference Radiomuseum is good, I just type "6A3 tube" in google search and it likely will give Radiomuseum page for the tube. It will have the symbol with the pinout.
The pinout is shown such that you need to look at the pins and then the nimbering goes CW. For octals the#1 is the first after the key. For 6A3 these are the two fat pins.
Typically marked as "f" or "h" (filament or heater" in drawings.
Take your ohmmeter to the pins. It should show some tens of Ohms. Open is bad. Usually there are ni shorts across heaters.
PS. If not anything else, do buy the multimeter.
Find the datasheet for it. As a quick reference Radiomuseum is good, I just type "6A3 tube" in google search and it likely will give Radiomuseum page for the tube. It will have the symbol with the pinout.
The pinout is shown such that you need to look at the pins and then the nimbering goes CW. For octals the#1 is the first after the key. For 6A3 these are the two fat pins.
Typically marked as "f" or "h" (filament or heater" in drawings.
Take your ohmmeter to the pins. It should show some tens of Ohms. Open is bad. Usually there are ni shorts across heaters.
PS. If not anything else, do buy the multimeter.
People who do not drink, do not smoke, do not eat red meat will one day feel really stupid lying there and dying from nothing.
