Hoffman Amplifiers Tube Amplifier Forum
Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: jewishjay on October 15, 2020, 09:42:01 am
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I picked up some big stout looking transformers at an antique shop yesterday. Heavy 4" cubes He wanted $20 each, I got all 4 for $65.
the 1st is 430-0-430 with 3.5 and 6.3 and another 6.3ct
the 2nd is 380-0-380 with 6.3 and 5 and 2.5ct
but the 3rd is an odd step down that has 27-0-27 and 26 and 5.5
what could i do with that one?
and the 4th one has so many wires...I'll give you my measurements and maybe you can help figure out what it is, but I must confess....I let the smoke out of it....
so theres 4 fat black wires which I assumed was the primary side .7 ohms between each pair (but I applied 120v and now my shop smells sad)
on the same side theres a multi tapped set
red - red green= 73 ohms
red - red yellow= 139 ohms
red - red black=n200 ohms
red - brown= 275 ohms
then, on the other side theres a few different coils
green pair= .7 ohm
brown with red ct = .5 ohms
black - black yellow = 3.5 ohms
blue - blue yellow = 247 ohms
sorry guys, I probably smoked it....but what is it? did I just wreck the best output transformer I'll ever see? what is this thing?
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The third one could probably be used for SS circuits but has no use for guitar tube amps. The fourth one is a boat anchor. I wouldn't spend too much time on it other than to figure out how to tie a rope to it. :icon_biggrin:
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oh well, $65 for the two good ones is still a decent deal.