Lundahl LL1931AG STEPUP Transformer

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The chassis is cut from a solid aluminum block in order to get rid of the inteference from the T/T air pump.

Now is dead quiet... Absoluterly no hum...​

Late to this thread but that is a VERY nice enclosure, Victor. Do you have those for sale or was it a one-off for your own personal system?

I've thought about using a step-up transformer off and on for years but I've always been put off by the high prices for ready-built SUTs and I've also tried to minimize the number of plug/jack junctions on the unamplified side of phono circuits.

I know amorphous cores are currently the hot choice in magnetic devices but I think I'd be interested in the mu-metal Lundahl LL1933Ag rather than the LL1931Ag. Do you have those in stock, Victor?

Thanks!

Steve Z

 

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This is my first sample. I should have the final version next week. Yes I order 40 PCS in this summer.
I only have LL1931Ag or Copper with Amorphous Core in stock..

 

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Thank you, Victor. Have you had a chance to compare the LL1931 to the LL1933, either Ag or Cu?

Steve Z

 

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Yes.. you can hear the huge difference.. the silver is more than double the copper SUT

 

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I'm sorry, I wasn't clear -- I meant have you had a chance to compare the mu-metal core to the amorphous core SUTs? I'd expect there to be a very noticeable difference between silver and copper, especially for the price of the silver versions!

Thanks,

Steve Z

 

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NO.. 1931 Copper or silver in Amorphous. core only..