"Jim Lesurf" wrote in message
...
In article , Iain M Churches
wrote:
Just a few days ago, he invited me to listen to a recording of
Shostakovich String Quartet No.3 Op.73 in F major, on which he
played. He uses a Russian built SET amplifier and a pair of Quad ELS.

Which amplifier, and which speakers?
The amp was built by a Russian engineer called Anton Reznikov,

As the result of a phone call, I now know that the amp uses a 211
preceded by a 6SN7 octal.

The ELS are later than I thought. Probably 1990?
From my description of them, my BBC pal tells me they are probably
type 63 Mk II. They have handles on the side, and were a version for
the USA only he thinks.

Jim, can you confirm this?

Regards
Iain

On Wed, 12 Jan 2005 20:51:18 +0200, "Iain M Churches"
wrote:


"Jim Lesurf" wrote in message
...
In article , Iain M Churches
wrote:
Just a few days ago, he invited me to listen to a recording of
Shostakovich String Quartet No.3 Op.73 in F major, on which he
played. He uses a Russian built SET amplifier and a pair of Quad ELS.

Which amplifier, and which speakers?
The amp was built by a Russian engineer called Anton Reznikov,

As the result of a phone call, I now know that the amp uses a 211
preceded by a 6SN7 octal.

The ELS are later than I thought. Probably 1990?
From my description of them, my BBC pal tells me they are probably
type 63 Mk II. They have handles on the side, and were a version for
the USA only he thinks.

Jim, can you confirm this?

That's the 'pro' version of the '63, which was indeed intended for the
US market, and is generally regarded as superior. Indeed, some of the
'pro' mods were incorporated in the current 988 design.

While not by any means optimum, a good 211 amp is certainly capable of
very good results on small-scale music with those speakers, which
remain a design classic 40 years after their conception, and 25 years
after their launch on the market. The current 988/989 are upgrades to
the '63, rather than a new design.
--

Stewart Pinkerton | Music is Art - Audio is Engineering

In article , Iain M Churches
wrote:

"Jim Lesurf" wrote in message
...

As the result of a phone call, I now know that the amp uses a 211
preceded by a 6SN7 octal.

OK. Can you also confirm that the output impedance *is* as high as around 8
Ohms - as your quoted DF of 1 implies?

The ELS are later than I thought. Probably 1990? From my description
of them, my BBC pal tells me they are probably type 63 Mk II.

OK. These have a much less 'difficult' impedance characteristic than the
57s. However an amp with an o/p impedance of 8 ohms would still cause a
quite marked change in response as a result of impedance interaction.


They have handles on the side, and were a version for the USA only he
thinks.

Jim, can you confirm this?

I am not sure as I am not a quad 'expert'. but I think that, yes, handles
were something that only appeared on models not intended for domestic UK
useage.

Slainte,

Jim

--
Electronics http://www.st-and.ac.uk/~www_pa/Scot...o/electron.htm
Audio Misc http://www.st-and.demon.co.uk/AudioMisc/index.html
Armstrong Audio http://www.st-and.demon.co.uk/Audio/armstrong.html
Barbirolli Soc. http://www.st-and.demon.co.uk/JBSoc/JBSoc.html

"Jim Lesurf" wrote in message
...
In article , Iain M Churches
wrote:

"Jim Lesurf" wrote in message
...

As the result of a phone call, I now know that the amp uses a 211
preceded by a 6SN7 octal.

OK. Can you also confirm that the output impedance *is* as high as around
8
Ohms - as your quoted DF of 1 implies?

No. Happily I cannot:-) This was only a figure quoted to me my Andre, when
he said that some SET amps can have a DF=1. I think we would be most unwise
to assume that this is always the case.

OK. These have a much less 'difficult' impedance characteristic than the
57s. However an amp with an o/p impedance of 8 ohms would still cause a
quite marked change in response as a result of impedance interaction.

Please don't assume that Zo=8 ohms. It may keep you awake at night:-)

They have handles on the side, and were a version for the USA only he
thinks.

I am not sure as I am not a quad 'expert'. but I think that, yes, handles
were something that only appeared on models not intended for domestic UK
useage.

It was supposed top be a "prof" model for studio use in the US.
They were some other improvements, I noticed a bottom edge trim also which I
do not recall ever seeing before. But I am even less of a Quad expert than
yourself.
It is a great many years since I have seen a pair.



Iain