I build step up transformer boxes (SUTs) with different vintage input trafos and release them into the wild as a way to feed my hifi habit. I generally post them here, first; you may see them listed elsewhere on occasion.
These SUTs are entirely handcrafted by me, one or two or a few at a time. A lot of work goes into these little things! There's no automation involved; nothing is outsourced. I get weirdly hung up on aesthetics -- it's important to me that the wiring on the inside be as neat as possible, even if nobody ever sees it. It's all very labor intensive and inefficient from a "business" perspective... but fortunately this is just a hobby and I'll keep doing it as long as it's fun.
I use the best parts I can find for the price. Here are the build highlights in "standard" configuration:
AVAILABLE SUT UNITS
(Available inventory is based entirely on which transformers I have on hand and whether I have free time to build SUTs.)
UPDATED 07/14/2023
Some unusual offerings this time...
- - - - - U T C B-4566 - - - - -
(A11 in OEM case; see this post) ~1:15 $500
photos
- - - - - P E E R L E S S 4611-8 - - - - -
$ASK (this one's special)
photos
- - - - - U T R A D 2569 - - - - -
Crazy good bandwidth. These are BIG ~1:16 $535
photos and see this post
- - - - - T R I A D A-10 J - - - - -
TRIAD A-10J ~1:20 gain $550
These transformers were NOS and the original boxes will be included if you want them
More photos here
- - - - - R C A MI-12399 - - - - -
RCA MI-12399 ~1:14 gain $485 (This one's SOLD but I try to keep these "in stock"; the transformers aren't usually as shiny new)
More photos here
************************************************************************
PREVIOUS WORK
(The units below have been sold and are no longer available)
These SUTs are entirely handcrafted by me, one or two or a few at a time. A lot of work goes into these little things! There's no automation involved; nothing is outsourced. I get weirdly hung up on aesthetics -- it's important to me that the wiring on the inside be as neat as possible, even if nobody ever sees it. It's all very labor intensive and inefficient from a "business" perspective... but fortunately this is just a hobby and I'll keep doing it as long as it's fun.
I use the best parts I can find for the price. Here are the build highlights in "standard" configuration:
- gold-plated RCA connectors
- high purity "six 9's" Japan 6N OCC solid core copper wire 24awg (0.00009% pure copper) or
- NOS Western Electric wire, fresh off the spool
- Teflon insulating tubing
- TRT Wonder Solder audiophile grade solder
- NOS USA ground lug
- High quality sockets, new production or NOS when possible
- aluminum enclosure for additional shielding
- stainless steel hardware
AVAILABLE SUT UNITS
(Available inventory is based entirely on which transformers I have on hand and whether I have free time to build SUTs.)
UPDATED 07/14/2023
Some unusual offerings this time...
- - - - - U T C B-4566 - - - - -
(A11 in OEM case; see this post) ~1:15 $500
photos
- - - - - P E E R L E S S 4611-8 - - - - -
$ASK (this one's special)
photos
- - - - - U T R A D 2569 - - - - -
Crazy good bandwidth. These are BIG ~1:16 $535
photos and see this post
- - - - - T R I A D A-10 J - - - - -
TRIAD A-10J ~1:20 gain $550
These transformers were NOS and the original boxes will be included if you want them
More photos here
- - - - - R C A MI-12399 - - - - -
RCA MI-12399 ~1:14 gain $485 (This one's SOLD but I try to keep these "in stock"; the transformers aren't usually as shiny new)
More photos here
************************************************************************
PREVIOUS WORK
(The units below have been sold and are no longer available)
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