UTC LS-10 LS-10x's Input Trannys

[Edvard Puskaric]

Does anyone know of a substitute(that compares sonically) for these? I
can get new LS-10x's for about $500.00 each in lots of 10. That seems
pretty steep.

Ed

[Scott Dorsey]

Edvard Puskaric > wrote:
>Does anyone know of a substitute(that compares sonically) for these? I
>can get new LS-10x's for about $500.00 each in lots of 10. That seems
>pretty steep.

I don't think anybody really makes cheap junk interstage transformers
anymore, and the low end transformers that you do see don't have as much
iron as the LS-10, if that's what you're interested in.

The problem is basically that these transformers were made to be as neutral
as possible, back before people knew how to make transformers that were
very neutral. Most folks don't want transformers like that any more, so
the economies of scale just aren't there. UTC was turning out millions of
cheap transformers for clock radios, military intercoms and field phones,
all kinds of markets that just aren't there today.
--scott

--
"C'est un Nagra. C'est suisse, et tres, tres precis."

[Scott Dorsey]

Twist Turner > wrote:
>I believe Lundahl makes a UTC LS-10 replacement.

It's no good. It sounds much better than the original, and people don't
want that.
--scott


--
"C'est un Nagra. C'est suisse, et tres, tres precis."

[Scott Dorsey]

Bryson > wrote:
>Scott Dorsey wrote:
>> Twist Turner > wrote:
>>
>>>I believe Lundahl makes a UTC LS-10 replacement.
>>
>> It's no good. It sounds much better than the original, and people don't
>> want that.
>
>Then why spend $500 on an LS-10? Why
>not get an A-10, A-11, or enen an O-1,
>if coloration is the goal?

$500 for an LS-10? You gotta be kidding. $50 I might believe, but that
still seems pretty steep for old UTC junk.

>What's the application here anyway?

Dunno. It would have been nice if the original poster had mentioned that,
wouldn't it?
--scott
--
"C'est un Nagra. C'est suisse, et tres, tres precis."

[Justin Ulysses Morse]

Edvard Puskaric > wrote:


> I was a little vague here. What I meant was I want to use the tube
> preamp(bc-2B which uses the LS-10 input xformer) in front of the sound
> card, not the only the transformer... sorry. Yes I need gain due to
> the sound cards line-level only inputs. I've heard (not sure of
> particular models) John Hardy and Great River on the same fender amp
> with the same mic along with the neve 33122. They did not have the
> same sound quality(that I prefer) that the neve had. Not to say that
> there is anything the matter with them, I'm sure they have their
> place. Unfortunately I did not hear them on my guitar rig. Time to
> break open my piggy bank :-)


So, have you heard what a guitar amp through an SM57 and an RCA BC-2B
sounds like? Are you sure you'll like it? The difference between that
and the Neve you liked are a LOT bigger than the differences between
the Great River MP-2NV and the Neve you liked. But ultimately they're
all capable of getting the kind of sound you're talking about. They
won't all sound exactly the same on a given source but you just have to
find your guitar sounds while listening through the mic and preamp, and
dial in what you're after.

There's nothing too terribly special about the type of input
transformer you need for a BC-2B type design. Unless you're trying to
duplicate the exact sound, any high-ratio mic input transformer will
work. The schematic I have shows a grounded center tap on the primary,
but that is not a good idea in practice today. I'd suggest using a
Jensen JT-115K for the input. The real trick will be finding an output
transformer, since it's a single-ended circuit with DC current through
the transformer. That's a very special-purpose transformer not used
much today.

ulysses

[Scott Dorsey]

Bryson > wrote:
>Where are are you finding nos UTCs? At
>those prices, I'd guess Hong Kong.

Those aren't NOS, those are new production. UTC will still make all the
old types if you're willing to pay them the money for it.
--scott


--
"C'est un Nagra. C'est suisse, et tres, tres precis."

[Twist Turner]

If your building the BC-2b, I'd go with the Lundahls, they sound really
nice. They make a replacement for both the LS10 and LS27, the output
transformer they make will handle the DC current running through it. I
have 4 channels of BC-2b's one with the Lundahl output transformer.

Search for K and K audio, they are the US importers of the Lundahl
transformers and they also have a kit version available of the BC-2b.
On mine I used either A10's or A11's on the inputs, both sound the same
to me. LS10's seem to be going for about $150 on ebay which is
rediculous. I think I got my A11's for about $40 each, and I may even
have a few spares laying around here.

If I was you rather than spend all the time trying to make the pre(it's
gonna cost you at least $400-450 for one channel and at least 2 weeks of
your time getting the first one to work right, maybe more), you'd be
better off to get a TAB/Siemens/Telefunken V72 and run pig tails off the
back, they sound much better and are quieter. Usual street price in the
US when you can find them is about $600-650.





http://www.vintagemicsales.com

[Edvard Puskaric]

On Wed, 10 Sep 2003 02:12:06 GMT, Bryson >
wrote:

>Where are are you finding nos UTCs? At
>those prices, I'd guess Hong Kong.
>
>Edvard Puskaric wrote:
>
>>
>> BTW, The price listed is for brand new LS-10x's in lots of 10. Scary,
>> huh?
>>
>> Any input would be greatly appreciated.
>>
>> Ed
>>
>>

Sorry didn't mean to ignore you... like Scott said, you can contact
OPT and they will make them for you. Minus the old cast zinc container
;-). There's even a $500 dollar setup fee!

Ed