Deluxe New Tube Project Chassis on eBay

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Hi Jon:

Wow, these are really nice chassis. I would like to buy 4 of these from you.
Do you have more available for sale or do we go through Ebay exclusively.

BR/
Rich

Archived from groups: rec.audio.tubes,rec.audio.marketplace,alt.guitar.amps,rec.audio.tech,sci.electronics.design (More info?)

On Tue, 14 Dec 2004 14:37:10 -0800, Winfield Hill wrote:

> Rich Sherman wrote...
>>
>> Hi Jon:
>>
>> Wow, these are really nice chassis. I would like to buy 4 of these
>> from you. Do you have more available for sale or do we go through
>> Ebay exclusively.
>
> Hey, wait for me, I'd like to buy some as well.

Even I gotta admit, they are awful purty! :-)

Cheers!
Rich

Archived from groups: rec.audio.tubes,rec.audio.marketplace,alt.guitar.amps,rec.audio.tech,sci.electronics.design (More info?)

"Rich Grise" <rich@example.net> wrote in message
newsan.2004.12.14.23.16.25.694938@example.net...
> On Tue, 14 Dec 2004 14:37:10 -0800, Winfield Hill wrote:
>
> > Rich Sherman wrote...
> >>
> >> Hi Jon:
> >>
> >> Wow, these are really nice chassis. I would like to buy 4 of these
> >> from you. Do you have more available for sale or do we go through
> >> Ebay exclusively.
> >
> > Hey, wait for me, I'd like to buy some as well.
>
> Even I gotta admit, they are awful purty! :-)
>
> Cheers!
> Rich

I would like a few if I knew the price.
west

Archived from groups: rec.audio.tubes,rec.audio.marketplace,alt.guitar.amps,rec.audio.tech,sci.electronics.design (More info?)

Jon Yaeger wrote...
>
> The price is $119 each + S & H.
> Drop me an e-mail.

I can't... I don't have email at home anymore...
But I'll take two if you don't mind. And yes,
I'm working on the world's best tube amplifier!


--
Thanks,
- Win

Archived from groups: rec.audio.tubes,rec.audio.marketplace,alt.guitar.amps,rec.audio.tech,sci.electronics.design (More info?)

in article g4KdnSc0jbZqv13cRVn-ug@comcast.com, Arny Krueger at
arnyk@hotpop.com wrote on 12/15/04 6:41 AM:

> "Jon Yaeger" <jono_1@bellsouth.net> wrote in message
> news:BDE2AA1F.10AAF%jono_1@bellsouth.net
>> Deluxe new chassis for tube audio projects available on eBay,
>> starting at $1.00.
>>
>> See:
>>
>>
>> http://cgi.ebay.com/ws/eBayISAPI.d [...] 5737993411
>>
>>
>> Thanks for looking.
>
> Exactly what bad thing would happen if you built a SS project on one of
> these things?
>
> Is there some magic additive to the aluminum that is poisonous to silicon or
> what? ;-)
>
>
Why not buy one and find out??

Jon

Archived from groups: rec.audio.tubes,rec.audio.marketplace,alt.guitar.amps,rec.audio.tech,sci.electronics.design (More info?)

"Jon Yaeger" <jono_1@bellsouth.net> wrote in message
news:BDE5A80B.10FBE%jono_1@bellsouth.net
> in article g4KdnSc0jbZqv13cRVn-ug@comcast.com, Arny Krueger at
> arnyk@hotpop.com wrote on 12/15/04 6:41 AM:
>
>> "Jon Yaeger" <jono_1@bellsouth.net> wrote in message
>> news:BDE2AA1F.10AAF%jono_1@bellsouth.net
>>> Deluxe new chassis for tube audio projects available on eBay,
>>> starting at $1.00.
>>>
>>> See:
>>>
>>>
>>> http://cgi.ebay.com/ws/eBayISAPI.d [...] 5737993411
>>>
>>>
>>> Thanks for looking.
>>
>> Exactly what bad thing would happen if you built a SS project on one
>> of these things?
>>
>> Is there some magic additive to the aluminum that is poisonous to
>> silicon or what? ;-)
>>
>>
> Why not buy one and find out??


I'm in the midst of a major home renovation project, and all my
construction-related stuff is packed up someplace else. Not a good time for
new parts acquisitions.

Archived from groups: rec.audio.tubes,rec.audio.marketplace,alt.guitar.amps,rec.audio.tech,sci.electronics.design (More info?)

Boris Mohar wrote...
>
> On 14 Dec 2004 19:53:35 -0800, Winfield Hill wrote:
>
> And yes, I'm working on the world's best tube amplifier!
>
> Are you going to make the schematic available?

At some point, yes. But first it'll have to be vetted by a few
golden-ear tube fanatics. Part of the problem is that making a
low-distortion tube amplifier may defeat the purpose of a tube
amplifier in many people's eyes (and ears). My claim of "best"
tube amplifier will rest not simply on its low distortion, high
dynamic-range, low-noise, wideband capabilities, but on several
design aspects. This includes *no feedback* in the signal path,
which improves transient response and eliminates overload-recovery-
time issues, a DC-coupled OTL output stage, etc. Despite the
wide dynamic-range capability of my design, at some point it can
be driven to overload. This must happen gracefully, which means
intentionally introducing distortion. There's the rub. :> )


--
Thanks,
- Win

Archived from groups: rec.audio.tubes,rec.audio.marketplace,alt.guitar.amps,rec.audio.tech,sci.electronics.design (More info?)

"Winfield Hill" <hill_a@t_rowland-dotties-harvard-dot.s-edu> wrote in
message news:cprog40rc2@drn.newsguy.com

> But first it'll have to be vetted by a few
> golden-ear tube fanatics.

Lotsa luck getting a significant number of them to agree about *anything*.

> Part of the problem is that making a
> low-distortion tube amplifier may defeat the purpose of a tube
> amplifier in many people's eyes (and ears).

Agreed.

> My claim of "best"
> tube amplifier will rest not simply on its low distortion, high
> dynamic-range, low-noise, wideband capabilities, but on several
> design aspects. This includes *no feedback* in the signal path,
> which improves transient response and eliminates overload-recovery-
> time issues,

That's both mission impossible, and also a backwards approach.

It's impossible to build a practical amplifier tubed or otherwise, that
lacks some kind of inverse feedback. For example, avoiding inverse feedback
as much as possible eliminates common design features like unbypassed
cathode resistors and triodes.

> a DC-coupled OTL output stage, etc. Despite the
> wide dynamic-range capability of my design, at some point it can
> be driven to overload. This must happen gracefully, which means
> intentionally introducing distortion. There's the rub. :> )

Current thinking seems to be that it is best to do any required limiting at
line levels in an earlier signal processing stage, thus avoiding the power
amp actually ever going into clipping.

Archived from groups: rec.audio.tubes,rec.audio.marketplace,alt.guitar.amps,rec.audio.tech,sci.electronics.design (More info?)

Arny Krueger wrote...
>
> Winfield Hill wrote
>
>> My claim of "best"
>> tube amplifier will rest not simply on its low distortion, high
>> dynamic-range, low-noise, wideband capabilities, but on several
>> design aspects. This includes *no feedback* in the signal path,
>> which improves transient response and eliminates overload-
>> recovery-time issues,
>
> That's both mission impossible, and also a backwards approach.
>
> It's impossible to build a practical amplifier tubed or otherwise,
> that lacks some kind of inverse feedback.

No, it's possible, you simply haven't seen it done. It's also
possible to do it with very low distortion, at least over most
of the operating excursion. That's something you also haven't
seen before, right? That'll be my claim to tube fame. :> )

> For example, avoiding inverse feedback as much as possible
> eliminates common design features like unbypassed cathode
> resistors and triodes.

Cathode resistors? Don't believe in 'em, won't use 'em. :> )

>> a DC-coupled OTL output stage, etc. Despite the
>> wide dynamic-range capability of my design, at some point it can
>> be driven to overload. This must happen gracefully, which means
>> intentionally introducing distortion. There's the rub. :> )
>
> Current thinking seems to be that it is best to do any required
> limiting at line levels in an earlier signal processing stage,
> thus avoiding the power amp actually ever going into clipping.

Yes, that's my approach. But it does imply distortion at some
point, and exactly what style of graceful onset is best is a
tough issue. For example, feedback opamps with hard railing is
bad, even if they do it symmetrically.


--
Thanks,
- Win

Archived from groups: rec.audio.tubes,rec.audio.marketplace,alt.guitar.amps,rec.audio.tech,sci.electronics.design (More info?)

"John Woodgate" <jmw@jmwa.demon.contraspam.yuk> wrote in message
news:w+35J6DLIcwBFw6Y@jmwa.demon.co.uk
> I read in sci.electronics.design that Winfield Hill <hill_a@t_rowland-
> dotties-harvard-dot.s-edu> wrote (in <cps98u02789@drn.newsguy.com> )
> about 'Deluxe New Tube Project Chassis on eBay', on Thu, 16 Dec 2004:
>
>> Yes, that's my approach. But it does imply distortion at some
>> point, and exactly what style of graceful onset is best is a
>> tough issue. For example, feedback opamps with hard railing is
>> bad, even if they do it symmetrically.
>
> Indeed, hard limiting is very definitely a no-no.

Let's agree that all limiting is problematical.

> The original NAD
> amplifier (late 1970s?) with soft limiting did it very well,

There's an inherent problem with soft limiting. In order for the limiting to
be soft, it has to start at a relatively low level. You then lose the
benefits of clean performance at lower levels.

> and there may not have been much improvement since. But it was a
> transistor
> amplifier.

Probably the best and most widely accepted form of soft limiting is that
which is implemented in analog tape. But, a pretty horrific price is paid
for it - it ain't sonically transparent under virtually any circumstance.

Archived from groups: rec.audio.tubes,rec.audio.marketplace,alt.guitar.amps,rec.audio.tech,sci.electronics.design (More info?)

I read in sci.electronics.design that Arny Krueger <arnyk@hotpop.com>
wrote (in <iuSdnVP8ceWHWFzcRVn-1g@comcast.com> ) about 'Deluxe New Tube
Project Chassis on eBay', on Thu, 16 Dec 2004:

>There's an inherent problem with soft limiting. In order for the
>limiting to be soft, it has to start at a relatively low level. You then
>lose the benefits of clean performance at lower levels.

Depends what you mean by 'low'. While in power terms, a limit at -3 dB
looks undesirable, in terms of real signals, it's OK, provided that the
system has the usual sort of audiophile power reserve of 10 dB plus
(i.e. a 500 W amplifier when any normal mortal would be deafened at 50
W).
--
Regards, John Woodgate, OOO - Own Opinions Only.
The good news is that nothing is compulsory.
The bad news is that everything is prohibited.
http://www.jmwa.demon.co.uk Also see http://www.isce.org.uk