Hoffman Amplifiers Tube Amplifier Forum
Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: blown240 on January 16, 2012, 04:06:16 pm
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I am getting ready to build a RickTone Trem-O-Drive pedal and I have a question about the transformers.
Here is a schematic:
http://www.ricktone.com/tremodrive.shtml (http://www.ricktone.com/tremodrive.shtml)
The schematic uses 2 transformers; 1 to go from 120v to 12.6v and then another to go back to 120v. Wouldnt it be better to just use 1 transformer that has a 6.3 secondary? Like a preamp transformer... Or is there a reason that he did it the way he did?
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Cheap transformers from Radio Shed... that's why he did it.
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wow, they are still $10 each at radio shack. Seems you could get a small PT for around $20-25
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Dougs got a torid PT that's 2@ 9acv to 2@ 115acv? Nice $$.
http://www.hoffmanamps.com/MyStore/perlshop.cgi?action=template&thispage=Transformers&ORDER_ID=215178466 (http://www.hoffmanamps.com/MyStore/perlshop.cgi?action=template&thispage=Transformers&ORDER_ID=215178466)
And heres info on a tube boost/distrotion pedal project, look at the power supply, pages 1-4. As far as the power supply, same type of thing?
http://www.el34world.com/projects/tube_box.htm (http://www.el34world.com/projects/tube_box.htm)
Brad :icon_biggrin:
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> use 1 transformer that has a 6.3 secondary?
6 _and_ 120V. A less-common part. I can think of a few but 10 day $10 delivery.
Or one for 6 and one for 120. Two parts to source, and small 120V secondaries are less common.
Two 120-to-6 irons can be sourced everywhere. Aside from radio shed, you might scavenge them from old electronics.
The 120:6:120 conversion is lossy but we don't need much B+ power.
I see he opted for 12V heater connection, same difference, just hit the right pins.