Custom transformers source?
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Custom transformers source?
Hello, I'm designing a preamp with 3x 12AX7 in it. So i'm looking for a power transformer with 300VAC(10-15mA) and 6.3VAC(1A) secondary. To make things worse it has to be a low profile (under 1.7") so it can fit a 1U rack case. I gave up trying to find a standard one and now looking for a place to order a custom transformer. Does anyone have experience ordering custom transformers (within US or with reasonable shipping to US)?
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Re: Custom transformers source?
You might have luck with EdcorUSA.com. Try contacting them.
Thanks,
Josh
Thanks,
Josh
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Re: Custom transformers source?
Hi, thinking well outside the box, you could try a toroidal transformer at around 30-0-30 wired in series into a quadrupler and a separate small 6v transformer for the heaters. Search for "Lamington Guitar Amp" and some of the circuits there use quadruplers. I've used one with an EL84 SE amp and a separate 6v dc power supply for the heaters and it works fine.
Have fun
Nick
Have fun
Nick
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Re: Custom transformers source?
Grant, the guy behind the Lamington amps is a genuine Ozzie. He is very good at using salvaged parts from various sources and builds great amps with that. He can literally build a plexi for a few hundred bucks. I don’t like the baking pan chassis tho
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Re: Custom transformers source?
The Antek AS-05TC150 toroid has two 150V secondaries that can be wired in series, and two 6.3V 2A secondaries. This is a 50VA transformer, much larger electrically than what you need, but it's only 1.6" high. Perhaps Antek could also wind something similar on one of their 25VA cores.
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Re: Custom transformers source?
Thank you! That's the closest to what I need. Some extra power is not a problem as soon as it fits the case. And it's also inexpensive!TriodeLuvr wrote: ↑Tue 11/05/24 4:38 amThe Antek AS-05TC150 toroid has two 150V secondaries that can be wired in series, and two 6.3V 2A secondaries. This is a 50VA transformer, much larger electrically than what you need, but it's only 1.6" high. Perhaps Antek could also wind something similar on one of their 25VA cores.
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