[AMRadio] Thordarson transformer question

[Donald Chester]

>Something puzzles me, though - in the listing information it says "Features 
>Thordarson Switchboard Plug-in Terminal Board for quick and accurate 
>matching of tube loads". Now, I noticed that the terminals didn't have a 
>typical threaded screw hole or post like most others, but I have no idea 
>what kind of 'plug-in' plugs it uses. Is there anyone out there who could 
>shed some light on this matter for me?

They take a smooth pin, similar to the filament pin on a 4-pin tube socket.  
I don't think standard size banana plugs work.  Special plugs came with the 
transformers.  Lacking the plugs, try various sizes of large gauge copper 
wire, or small diameter brass rod stock from the hardware store.   You might 
even experiment with pins removed from (defunct) tubes if you have any lying 
around.  The pin should plug in with a snug fit, but not be forced in.  Once 
you figure out the optimum size, it shouldn't be difficult to come up with 
something to make a set of homebrew plugs.

Don K4KYV

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