6AU6
 

I notice RDH has several examples of using a 6AU6 in preamplifiers. These
seem readily available for reasonable prices (unlike the EF86 which seems
to be getting more expansive every day). Has anyone any experience using
the 6AU6 in preamps and is it any good?


Cheers

Ian

6AU6
 

On Mon, 04 Jun 2007 21:06:35 +0100, Ian Bell
wrote:

Ian Bell wrote:

I notice RDH has several examples of using a 6AU6 in preamplifiers. These
seem readily available for reasonable prices (unlike the EF86 which seems
to be getting more expansive every day). Has anyone any experience using
the 6AU6 in preamps and is it any good?


Cheers

Ian


Anyone?


If I were you I'd put this in rec.audio.tubes

d

--
Pearce Consulting
http://www.pearce.uk.com

6AU6
 

Ian Bell wrote:

I notice RDH has several examples of using a 6AU6 in preamplifiers. These
seem readily available for reasonable prices (unlike the EF86 which seems
to be getting more expansive every day). Has anyone any experience using
the 6AU6 in preamps and is it any good?


Cheers

Ian


Anyone?

6AU6
 

Ian Bell wrote:
Ian Bell wrote:


I notice RDH has several examples of using a 6AU6 in preamplifiers. These
seem readily available for reasonable prices (unlike the EF86 which seems
to be getting more expansive every day). Has anyone any experience using
the 6AU6 in preamps and is it any good?


Cheers

Ian



Anyone?



Andy Grove went through a period of using them as the first stage in
World Design power smplifers. I don't have personally experence, but
they should be ok.

As to if they are better than (say) a C3g or D3a is a different
question. Of course they came after RDH.

I suspect part of the price of the EF86 is due to the amplifiers that
used it instead of any implicit virtue of the valve.

--
Nick

6AU6
 

Don Pearce wrote:

On Mon, 04 Jun 2007 21:06:35 +0100, Ian Bell
wrote:

Ian Bell wrote:

I notice RDH has several examples of using a 6AU6 in preamplifiers.
These seem readily available for reasonable prices (unlike the EF86
which seems to be getting more expansive every day). Has anyone any
experience using the 6AU6 in preamps and is it any good?


Cheers

Ian


Anyone?


If I were you I'd put this in rec.audio.tubes

d


Not sure I can cope with the likely resulting diatribe but, hey ho, what the
hell ;-)


Ian

6AU6
 

Nick Gorham wrote:

Ian Bell wrote:
Ian Bell wrote:


I notice RDH has several examples of using a 6AU6 in preamplifiers. These
seem readily available for reasonable prices (unlike the EF86 which seems
to be getting more expansive every day). Has anyone any experience using
the 6AU6 in preamps and is it any good?


Cheers

Ian



Anyone?



Andy Grove went through a period of using them as the first stage in
World Design power smplifers. I don't have personally experence, but
they should be ok.

As to if they are better than (say) a C3g or D3a is a different
question. Of course they came after RDH.

I suspect part of the price of the EF86 is due to the amplifiers that
used it instead of any implicit virtue of the valve.


The only obvious (specified) virtue of the EF86 is its AF noise and hum
performance neither of which is specified for the 6AU6 probably because it
was intended as and RF amp.

I suspect you are right about the causes of EF86 price rise - which in a
sense pleases me because I should be able to get 6AU6s cheaply.

Ian

6AU6
 

"Ian Bell" wrote in message
...
Nick Gorham wrote:


Andy Grove went through a period of using them as the first stage in
World Design power smplifers. I don't have personally experence, but
they should be ok.


Yes, I have them (NOS military Mullards) in my KT88 - perfectly fine. (I
believe one of the reasons they were originally selected by AG is that
they are very *quiet* and they were described as 'wonderfully linear' in
the sales blurb at the time...??)


I suspect you are right about the causes of EF86 price rise - which in
a
sense pleases me because I should be able to get 6AU6s cheaply.


Note you will need dinky little B7G sockets for them...

6AU6
 

"Keith G" wrote in message
...

"Ian Bell" wrote in message
...
Nick Gorham wrote:


Andy Grove went through a period of using them as the first stage in
World Design power smplifers. I don't have personally experence, but
they should be ok.


Yes, I have them (NOS military Mullards) in my KT88 - perfectly fine.
(I believe one of the reasons they were originally selected by AG is
that they are very *quiet* and they were described as 'wonderfully
linear' in the sales blurb at the time...??)


I suspect you are right about the causes of EF86 price rise - which
in a
sense pleases me because I should be able to get 6AU6s cheaply.


Note you will need dinky little B7G sockets for them...


Meant also to say that they are 'close or identical' to the EF94
according to Duncan:

http://tdsl.duncanamps.com/show.php?des=EF94

And these:

http://cgi.ebay.co.uk/ws/eBayISAPI.d...link:middle:uk

I should be *buying* - not telling you about them!! :-)

See also:

http://cgi.ebay.co.uk/EF94-6AU6-6ZH4...QQcmdZViewItem

6AU6
 

Keith G wrote:


Meant also to say that they are 'close or identical' to the EF94
according to Duncan:

http://tdsl.duncanamps.com/show.php?des=EF94


yes, I had discovered that whilst searching for data sheets.

And these:


http://cgi.ebay.co.uk/ws/eBayISAPI.d...link:middle:uk

Not found that one - thanks !


I should be *buying* - not telling you about them!! :-)

See also:


http://cgi.ebay.co.uk/EF94-6AU6-6ZH4...QQcmdZViewItem

Yup, got that one too. There seems to be plenty on eBay right now. There are
4 lots of 35 x 6AU6 from a USA seller right now with quite reasonable UK
shipping charges too, he

http://cgi.ebay.co.uk/ws/eBayISAPI.d...MEWA:IT&ih=007

Ian

6AU6
 

Keith G wrote:


Note you will need dinky little B7G sockets for them...

Indeed. Also explains why they are popular in some tube mics wired as
triodes - Sony C800 IIRC, he

http://www.gyraf.dk/schematics/Sony_C800G_Schematic.gif

Ian

6AU6
 

"Ian Bell"


Indeed. Also explains why they are popular in some tube mics wired as
triodes - Sony C800 IIRC, he

http://www.gyraf.dk/schematics/Sony_C800G_Schematic.gif



** So YOU actually own one of these US$7,800 mics - dickhead ??

http://www.frontendaudio.com/Sony_C8...o _p/3362.htm

Reckon the Peltier cooler and that sexy heat pump might be the secret of the
" warm " sound ???


ROTFL !!




......... Phil

6AU6
 

Phil Allison wrote:


"Ian Bell"


Indeed. Also explains why they are popular in some tube mics wired as
triodes - Sony C800 IIRC, he

http://www.gyraf.dk/schematics/Sony_C800G_Schematic.gif



** So YOU actually own one of these US$7,800 mics - dickhead ??



No.

Ian

6AU6
 

On Tue, 05 Jun 2007 00:59:30 +0100, Ian Bell
wrote:

Keith G wrote:


Note you will need dinky little B7G sockets for them...

Indeed. Also explains why they are popular in some tube mics wired as
triodes - Sony C800 IIRC, he

http://www.gyraf.dk/schematics/Sony_C800G_Schematic.gif

Ian

I wonder why they have wired it as a triode - you'd have thought they
would want it as linear as possible. Also, they have a very attenuated
bias voltage feed for the capsule.

All very odd.

d

--
Pearce Consulting
http://www.pearce.uk.com

6AU6
 

Don Pearce wrote:

On Tue, 05 Jun 2007 00:59:30 +0100, Ian Bell
wrote:

Keith G wrote:


Note you will need dinky little B7G sockets for them...

Indeed. Also explains why they are popular in some tube mics wired as
triodes - Sony C800 IIRC, he

http://www.gyraf.dk/schematics/Sony_C800G_Schematic.gif

Ian

I wonder why they have wired it as a triode - you'd have thought they
would want it as linear as possible. Also, they have a very attenuated
bias voltage feed for the capsule.

All very odd.

d


The usual reason given is headroom plus probably the more tolerable 2H
distortion at high levels in a triode rather than the 3H you tend to get in
pentodes. ISTR this mic is specified to handle 150dB SPL - quite why you
would want to do that I don't know but with that level of sound input you
don't need a lot of gain. How this affects the performance at much lower
signal levels, especially noise performance, is another question.

Ian

6AU6
 

"Ian Bell"
Don Pearce wrote:

I wonder why they have wired it as a triode - you'd have thought they
would want it as linear as possible. Also, they have a very attenuated
bias voltage feed for the capsule.

All very odd.



The usual reason given is headroom plus probably the more tolerable 2H
distortion at high levels in a triode rather than the 3H you tend to get
in
pentodes.


** The Pearce jerkoff meant instead of a " cathode follower "

- you ****ing, ****wit, pommy audiophool **** .



ISTR this mic is specified to handle 150dB SPL

** No it is NOT !!

- you ****wit, pommy audiophool **** !



- quite why you
would want to do that I don't know


** ROTFLMAO

- what a ****wit, pommy audiophool **** !



........ Phil

Piss Off Bell Boy TROLL
 

"Ian Bell"
Phil Allison wrote:

http://www.gyraf.dk/schematics/Sony_C800G_Schematic.gif

** So YOU actually own one of these US$7,800 mics - dickhead ??


No.


** ROTFLMAO !!


So our * Bell Boy * is a CHEAPSKATE audiophool ****** !!

Must jerk himself silly over old SM58s with a dinged grilles !!

Wot a HOOT !!





........ Phil

6AU6
 

On Tue, 5 Jun 2007 21:56:09 +1000, "Phil Allison"
wrote:


"Ian Bell"
Don Pearce wrote:

I wonder why they have wired it as a triode - you'd have thought they
would want it as linear as possible. Also, they have a very attenuated
bias voltage feed for the capsule.

All very odd.



The usual reason given is headroom plus probably the more tolerable 2H
distortion at high levels in a triode rather than the 3H you tend to get
in
pentodes.


** The Pearce jerkoff meant instead of a " cathode follower "

- you ****ing, ****wit, pommy audiophool **** .


Idiot. If I had meant that I would have written "I wonder why they
wired it as a common cathode".

Now - lie still. It is nearly time for the nurse to turn you over;
don't want bed sores, do we?

d
--
Pearce Consulting
http://www.pearce.uk.com

6AU6
 

"Ian Bell" wrote in message
...
Phil Allison wrote:


"Ian Bell"


Indeed. Also explains why they are popular in some tube mics wired as
triodes - Sony C800 IIRC, he

http://www.gyraf.dk/schematics/Sony_C800G_Schematic.gif



** So YOU actually own one of these US$7,800 mics - dickhead ??





No.

Ian

There are quite a few vintage tube mics worth considerably mo-)
Iain

6AU6
 

"Iain Churches"
"Ian Bell"


Indeed. Also explains why they are popular in some tube mics wired as
triodes - Sony C800 IIRC, he

http://www.gyraf.dk/schematics/Sony_C800G_Schematic.gif

** So YOU actually own one of these US$7,800 mics - dickhead ??

No.

Ian

There are quite a few vintage tube mics worth considerably mo-)



** What they are really " worth " is **** all.

What some narcissistic, autistic audiophool collector and mic fetishist
*might* be conned into paying is a sad comment on him.


**** off Cherches IDIOT !!!



........ Phil

6AU6
 

"Phil Allison" wrote in message
...

"Ian Bell"


Indeed. Also explains why they are popular in some tube mics wired as
triodes - Sony C800 IIRC, he

http://www.gyraf.dk/schematics/Sony_C800G_Schematic.gif

** So YOU actually own one of these US$7,800 mics - dickhead
??

No.

Ian

There are quite a few vintage tube mics worth considerably mo-)



** What they are really " worth " is **** all.

What some narcissistic, autistic audiophool collector and mic fetishist
*might* be conned into paying is a sad comment on him.

Most are kept in the mic cupboards of well-established studios some
of which have owned these mics since new. The ones that come
up for sale (and that is very rarely) are snapped up pretty quickly.

As I mentioned to Patrick, many tube mics, that were converted to
FET in the 70s are now being converted back again:-)

Some well-established artists come to studio sessions with their
own mic (often an early Neumann M47, M40, M50) and mic
preamp/compressor.

I can see you don't do much studio work Phil:-)

Iain

Churches = MORON
 

"Iain Churches = Utter MORON "



Indeed. Also explains why they are popular in some tube mics wired as
triodes - Sony C800 IIRC, he

http://www.gyraf.dk/schematics/Sony_C800G_Schematic.gif

** So YOU actually own one of these US$7,800 mics - dickhead
??

There are quite a few vintage tube mics worth considerably mo-)


** What they are really " worth " is **** all.

What some narcissistic, autistic audiophool collector and mic fetishist
*might* be conned into paying is a sad comment on him.

Most are kept in the mic cupboards of well-established studios some
of which have owned these mics since new. The ones that come
up for sale (and that is very rarely) are snapped up pretty quickly.

As I mentioned to Patrick, many tube mics, that were converted to
FET in the 70s are now being converted back again:-)

Some well-established artists come to studio sessions with their
own mic (often an early Neumann M47, M40, M50) and mic
preamp/compressor.

I can see you don't do much studio work Phil:-)



** I see it proved once again the asinine Cherches autistic ****wit simply
cannot read.





........ Phil

Churches = MORON
 

"Phil Allison" wrote in message
...

"Iain Churches = Utter MORON "



Indeed. Also explains why they are popular in some tube mics wired
as
triodes - Sony C800 IIRC, he

http://www.gyraf.dk/schematics/Sony_C800G_Schematic.gif

** So YOU actually own one of these US$7,800 mics - dickhead
??

There are quite a few vintage tube mics worth considerably mo-)


** What they are really " worth " is **** all.

What some narcissistic, autistic audiophool collector and mic fetishist
*might* be conned into paying is a sad comment on him.

Most are kept in the mic cupboards of well-established studios some
of which have owned these mics since new. The ones that come
up for sale (and that is very rarely) are snapped up pretty quickly.

As I mentioned to Patrick, many tube mics, that were converted to
FET in the 70s are now being converted back again:-)

Some well-established artists come to studio sessions with their
own mic (often an early Neumann M47, M40, M50) and mic
preamp/compressor.

I can see you don't do much studio work Phil:-)



** I see it proved once again the asinine Cherches autistic ****wit
simply cannot read.

And the asinine Allison autistic ****wit simply
cannot spell:-)

Churches = MORON
 

In article i,
Iain Churches wrote:
And the asinine Allison autistic ****wit simply
cannot spell:-)

Thanks for quoting him. Otherwise I'd never have read his pearls of wisdom
as he's the only one in the entire world in my killfile.

--
*Born free - taxed to death *

Dave Plowman London SW
To e-mail, change noise into sound.

Churches = MORON
 

"Dave Plowman (News)" wrote in message
...
In article i,
Iain Churches wrote:
And the asinine Allison autistic ****wit simply
cannot spell:-)

Thanks for quoting him. Otherwise I'd never have read his pearls of wisdom
as he's the only one in the entire world in my killfile.

Don't put Phil in your killfile. That's a big mistake:-)
Despite his lack of social graces, and ignoring his
invective, he is rarely incorrect in what he posts on
technical matters. I would accept Phil's word against
Arny's any day. Unlike Arny, Phil has no hidden agenda -
we are *all* autistic f*ckwits:-))))

Iain

Churches = MORON
 

"Iain Cherchus = ****wit"


I would accept Phil's word against
Arny's any day. Unlike Arny, Phil has no hidden agenda -


** Arny's hidden agenda is ???

1. He hates all audiophools ?

2. He pretends to have deep, secret knowledge ?

3. He suffers delusions of grandeur ?

4. All the above ?

5. Something else?




....... Phil