As it's a bit quiet, if anyone is interested my new Triode Project is
getting under way, see....

http://www.apah69.dsl.pipex.com/keit...de_project.htm

....where you will notice:

a) most of the components have now been received and are being buggered
about with

b) the power trannie and choke have yet to be turned 90 deg as per Nick G's
tip-off about hum fields re. the OPTs

c) I've started making holes in the chassis......

d) the kitchen table ain't getting any younger......

;-)

"Keith G" wrote in message
...
As it's a bit quiet, if anyone is interested my new Triode Project is
getting under way, see....


http://www.apah69.dsl.pipex.com/keit...de_project.htm

...where you will notice:

a) most of the components have now been received and are being buggered
about with

b) the power trannie and choke have yet to be turned 90 deg as per Nick
G's
tip-off about hum fields re. the OPTs

c) I've started making holes in the chassis......

d) the kitchen table ain't getting any younger......

;-)



Click it again - I've been busy.....

:-)

On Thu, 24 Jun 2004 17:04:04 +0100, "Keith G"
wrote:


"Keith G" wrote in message
...
As it's a bit quiet, if anyone is interested my new Triode Project is
getting under way, see....


http://www.apah69.dsl.pipex.com/keit...de_project.htm

...where you will notice:

a) most of the components have now been received and are being buggered
about with

b) the power trannie and choke have yet to be turned 90 deg as per Nick
G's
tip-off about hum fields re. the OPTs

c) I've started making holes in the chassis......

d) the kitchen table ain't getting any younger......

;-)

Click it again - I've been busy.....

Looks a bit girlie - what's wrong with 845s? :-)

--

Stewart Pinkerton | Music is Art - Audio is Engineering

Stewart Pinkerton wrote:



Looks a bit girlie - what's wrong with 845s? :-)


Very little, Mu could be a tad higher to make A2 driving simpiler but
other than that.

Same could be said of GM70's though...

--
Nick

"Stewart Pinkerton" wrote in message
...
On Thu, 24 Jun 2004 17:04:04 +0100, "Keith G"
wrote:


"Keith G" wrote in message
...
As it's a bit quiet, if anyone is interested my new Triode Project is
getting under way, see....



http://www.apah69.dsl.pipex.com/keit...de_project.htm

...where you will notice:

a) most of the components have now been received and are being buggered
about with

b) the power trannie and choke have yet to be turned 90 deg as per Nick
G's
tip-off about hum fields re. the OPTs

c) I've started making holes in the chassis......

d) the kitchen table ain't getting any younger......

;-)

Click it again - I've been busy.....

Looks a bit girlie - what's wrong with 845s? :-)



Hmmm, 845s.......

Hmmmm.......

OK!!

They can go on the list then!

;-)

845s are about £20 (Crowthorne Tubes) - decent unremarkable Chinese. Plus you
can run them at about 450v - there's lots of stuff on low voltage 845 amps on
the Asylum. I've built the chassis for such an amp, and those sockets are
awesome. Just moved over to another build at the moment but will come back to
that one. I have four SV811-10 for anyone with a taste for higher voltages
(plus one spare). Needs about 600v to get down to low figure distortion. At
that sort of voltage a mu stage/mu follower/SRPP seems like an easy solution
for a quick build. There's also Thorten's Legacy with the EL84 driver, which is
pretty simple. 845 amps are just big, they're not impractical, apart from the
OPT, though 6.6K might scrape through in a low voltage PP version, particularly
if you changed the output taps.

=== Andy Evans ===
Visit our Website:- http://www.artsandmedia.com
Audio, music and health pages and interesting links.

On 25 Jun 2004 13:20:07 GMT, ohawker (Andy
Evans) wrote:

845s are about £20 (Crowthorne Tubes) - decent unremarkable Chinese.

Yes, but the thing about the 845/211 is that it's *way* more linear
than the 300B. So, if the claim is that tube amps are somehow *better*
than SS amps - but have some special magic - then the superior
linearity of the 845/211 should count in its favour. After all, the
most legenday SET of all, the Ongaku, used the 211.

Of course, it it's the added *distortions* of the 300B which are the
attraction, then that's a whole other ball game, no? :-)
--

Stewart Pinkerton | Music is Art - Audio is Engineering

"Stewart Pinkerton" wrote in message
...
On 25 Jun 2004 13:20:07 GMT, ohawker (Andy
Evans) wrote:

845s are about £20 (Crowthorne Tubes) - decent unremarkable Chinese.

Yes, but the thing about the 845/211 is that it's *way* more linear
than the 300B. So, if the claim is that tube amps are somehow *better*


Well, I don't know about *better*, but I certainly prefer them. But, having
said that, I've just bought two nearly identical SS amps for 'non vinyl'
use..... ;-)


than SS amps - but have some special magic - then the superior
linearity of the 845/211 should count in its favour. After all, the
most legenday SET of all, the Ongaku, used the 211.

Of course, it it's the added *distortions* of the 300B which are the
attraction, then that's a whole other ball game, no? :-)


'Characteristics' is perhaps a better choice of word in this context as
*distortions* might imply (to those who know no better) that there is a
single amplifier, somewhere on the planet that actually *doesn't* distort
the audio signal in some way, don't you think?

(Nice little 'soft troll', nevertheless..... ;-)

On Sat, 26 Jun 2004 23:23:50 +0100, "Keith G"
wrote:

"Stewart Pinkerton" wrote in message
.. .
On 25 Jun 2004 13:20:07 GMT, ohawker (Andy
Evans) wrote:

845s are about £20 (Crowthorne Tubes) - decent unremarkable Chinese.

Yes, but the thing about the 845/211 is that it's *way* more linear
than the 300B. So, if the claim is that tube amps are somehow *better*

Well, I don't know about *better*, but I certainly prefer them. But, having
said that, I've just bought two nearly identical SS amps for 'non vinyl'
use..... ;-)

Ah, you like to take your distortions all in one lump or none at all,
eh? :-)

than SS amps - but have some special magic - then the superior
linearity of the 845/211 should count in its favour. After all, the
most legenday SET of all, the Ongaku, used the 211.

Of course, it it's the added *distortions* of the 300B which are the
attraction, then that's a whole other ball game, no? :-)

'Characteristics' is perhaps a better choice of word in this context as
*distortions* might imply (to those who know no better) that there is a
single amplifier, somewhere on the planet that actually *doesn't* distort
the audio signal in some way, don't you think?

There is - many (perhaps most) modern SS amps don't possess any
*audible* distortion, as their sonic identity under controlled
listening conditions will show. Most tube amps, OTOH, *do* possess
audible distortions.

(Nice little 'soft troll', nevertheless..... ;-)

I try................ :-)
--

Stewart Pinkerton | Music is Art - Audio is Engineering

"Stewart Pinkerton" wrote in message
...
On Sat, 26 Jun 2004 23:23:50 +0100, "Keith G"
wrote:

"Stewart Pinkerton" wrote in message
.. .
On 25 Jun 2004 13:20:07 GMT, ohawker (Andy
Evans) wrote:

845s are about £20 (Crowthorne Tubes) - decent unremarkable Chinese.

Yes, but the thing about the 845/211 is that it's *way* more linear
than the 300B. So, if the claim is that tube amps are somehow *better*

Well, I don't know about *better*, but I certainly prefer them. But,
having
said that, I've just bought two nearly identical SS amps for 'non vinyl'
use..... ;-)

Ah, you like to take your distortions all in one lump or none at all,
eh? :-)



Ooh! That reminds me of a particularly disgusting joke I heard a long time
ago! :-)



than SS amps - but have some special magic - then the superior
linearity of the 845/211 should count in its favour. After all, the
most legenday SET of all, the Ongaku, used the 211.

Of course, it it's the added *distortions* of the 300B which are the
attraction, then that's a whole other ball game, no? :-)

'Characteristics' is perhaps a better choice of word in this context as
*distortions* might imply (to those who know no better) that there is a
single amplifier, somewhere on the planet that actually *doesn't* distort
the audio signal in some way, don't you think?

There is - many (perhaps most) modern SS amps don't possess any
*audible* distortion, as their sonic identity under controlled
listening conditions will show. Most tube amps, OTOH, *do* possess
audible distortions.


Not this one:

http://www.apah69.dsl.pipex.com/keit...de_project.htm


It's the only 'tube amp' I know that's actually got *visible*
distortions......

(Fekkin' Dremels.....)

:-)