Test Output Transformer Enclosure

This is to let you make a test output transformer for when doing service work on vintage/antique radios & similar circuits. All you will need is one very-cheap output transformer (avail from a variety of sources online for $10-20), two screws with aggressive threads like a short drywall screw or wood screw and 7 banana-plug sockets.

The output transformer I suggest using is meant for 70V PA speakers common in office buildings & hospitals. It is not designed to be used in this manner, but if you're only using it temporarily for testing small tube circuits it will work just fine. I have used it on everything from postwar AA5 sets to 8-tube TRFs with push-pull 45s. It is probably fine for up to maybe 10-watts, so don't expect it to survive a super high current audio amplifier for hifi or guitars. If you're looking for a test rig for a vintage radio, this will service most applications. If you're looking for a test rig for your KT-88s or 807s, this is not for you.

For SE (Single Ended) c