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

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?

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

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

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

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

"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...

"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

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