Loop Trannies Available

[Funkalicousgroove]

Hi everybody,

Just wanted to let you all know that I have some extra loop Trannies available, they are $39 ea plus s&h. Send a PM if you are interested.

[Gitarrmongot]

I'm interested but since I live in Europe (230Volt land!) is it useable at all for me?

[Funkalicousgroove]

you'd have to use a converter

[ayan]

you'd have to use a converter

Do you? It's a 1:1 job intended to be used with a doubler for 120VAC. If you feed it 235V instead and use a full bridge, you'll get the same voltages on the secondary, same power consumption. Don't thik the primary will care about the voltage being twice as high because the current through it will be exactly half of what it is in the US.

Gil

[Funkalicousgroove]

you'll get 12.6v filament or so that way- You can try it I s'pose but I make no warranty

[ayan]

you'll get 12.6v filament or so that way- You can try it I s'pose but I make no warranty

Forgot to clarify that. Sure, you get 12.6 V for the heaters, which you can totally use for one 12AX7 if don't run the two heaters in parallel by not using pin 9 and feeding the 12.6VAC to pins 4 and 5 -- of course, this means DO NOT TIE THEM TOGETHER. Power consumption is the same, so I don't believe the secondary would mind having half the current and twice the voltage. As a rule, the only time voltage (as opposed to power) is a problem in ratings is if there is the risk of arching. Not the case with the heater supply.

Gil

[Funkalicousgroove]

Good call Gil!!

So I guess just rectify Full wave, and of course you'll need to change the pilot lamp setup to account for the add'l voltage.

like I said, I make no warranty, but I'd love to hear how one such unit turns out!

[ayan]

Good call Gil!!

So I guess just rectify Full wave, and of course you'll need to change the pilot lamp setup to account for the add'l voltage.

like I said, I make no warranty, but I'd love to hear how one such unit turns out!

Right, so that means replacing the 390 ohm resistor with a 1K one, just like Dumble used for the pilot LED on the amps with the auxiliary 12.6 V tranny.

I appreciate you not making any warranties about it, I wouldn't either just in case. But I would be totally comfortable trying this myself if it was my own personally tranny.... Hey, fly me to Europe and I will built and check it out for you over there! I realize you can buy a step up transformer for a little less dough, but why do that?

Gil

[Funkalicousgroove]

I already have a step up, but if you want to come out I'll put ya up for your stay- fair enough?

[ayan]

I already have a step up, but if you want to come out I'll put ya up for your stay- fair enough?

Sure.

Gil