On 2 Jan, 12:33, "Nick" wrote:


Don't skimp on quality, go for the best!

http://www.russandrews.com/product.a...UK&currency=GB...

In Russ's quest to extract even more

money from his customers' wallets

performance from his Hi-Fi system, he's
identified a new way of cleaning your mains supply that's even more
effective than our Ultra Purifier mains filters.

The new product 'balances' the mains and cleans the mains supply in a
completely new way; it's quite capable of lifting the performance of your
system to a completely new level.

The principle is sound, like balanced audio circuits, it uses a
transformer with two secondaries of half the primary voltage,
connected in series, with the junction earthed and the load supplied
across the two outer ends. You could get a suitable transformer made
for much less than Russ charges.

In article
..com,
writes
On 2 Jan, 12:33, "Nick" wrote:


Don't skimp on quality, go for the best!

http://www.russandrews.com/product.a...UK&currency=GB...

In Russ's quest to extract even more

money from his customers' wallets

performance from his Hi-Fi system, he's
identified a new way of cleaning your mains supply that's even more
effective than our Ultra Purifier mains filters.

The new product 'balances' the mains and cleans the mains supply in a
completely new way; it's quite capable of lifting the performance of your
system to a completely new level.

The principle is sound, like balanced audio circuits, it uses a
transformer with two secondaries of half the primary voltage,
connected in series, with the junction earthed and the load supplied
across the two outer ends. You could get a suitable transformer made
for much less than Russ charges.

Do you simply mean a transformer with a centre-tapped secondary, or
is there more to it than that?
--
Bill Borland
(G3EFS)

I hate to think, you don't expect the guy to tell everyone his voodoo
secrets?
I suppose you also use a valve to do the rectification. I suggest the 5y3
myself, though you need a specially cleaned supply for the heaters to avoid
heater/cathode intermediation distortion....

grin.

Brian

--
Brian Gaff -
Note:- In order to reduce spam, any email without 'Brian Gaff'
in the display name may be lost.
Blind user, so no pictures please!
"Bill Borland" wrote in message
...
In article
.com,
writes
On 2 Jan, 12:33, "Nick" wrote:


Don't skimp on quality, go for the best!

http://www.russandrews.com/product.a...UK&currency=GB...

In Russ's quest to extract even more

money from his customers' wallets

performance from his Hi-Fi system, he's
identified a new way of cleaning your mains supply that's even more
effective than our Ultra Purifier mains filters.

The new product 'balances' the mains and cleans the mains supply in a
completely new way; it's quite capable of lifting the performance of
your
system to a completely new level.

The principle is sound, like balanced audio circuits, it uses a
transformer with two secondaries of half the primary voltage,
connected in series, with the junction earthed and the load supplied
across the two outer ends. You could get a suitable transformer made
for much less than Russ charges.

Do you simply mean a transformer with a centre-tapped secondary, or
is there more to it than that?
--
Bill Borland
(G3EFS)

My spell checker invented the type of distortion, but actually its quite apt
considering all that heated discussion this has caused...
Brian

--
Brian Gaff -
Note:- In order to reduce spam, any email without 'Brian Gaff'
in the display name may be lost.
Blind user, so no pictures please!
"Brian Gaff" wrote in message
m...
I hate to think, you don't expect the guy to tell everyone his voodoo
secrets?
I suppose you also use a valve to do the rectification. I suggest the 5y3
myself, though you need a specially cleaned supply for the heaters to
avoid heater/cathode intermediation distortion....

grin.

Brian

--
Brian Gaff -
Note:- In order to reduce spam, any email without 'Brian Gaff'
in the display name may be lost.
Blind user, so no pictures please!
"Bill Borland" wrote in message
...
In article
.com,
writes
On 2 Jan, 12:33, "Nick" wrote:


Don't skimp on quality, go for the best!

http://www.russandrews.com/product.a...UK&currency=GB...

In Russ's quest to extract even more

money from his customers' wallets

performance from his Hi-Fi system, he's
identified a new way of cleaning your mains supply that's even more
effective than our Ultra Purifier mains filters.

The new product 'balances' the mains and cleans the mains supply in a
completely new way; it's quite capable of lifting the performance of
your
system to a completely new level.

The principle is sound, like balanced audio circuits, it uses a
transformer with two secondaries of half the primary voltage,
connected in series, with the junction earthed and the load supplied
across the two outer ends. You could get a suitable transformer made
for much less than Russ charges.

Do you simply mean a transformer with a centre-tapped secondary, or
is there more to it than that?
--
Bill Borland
(G3EFS)

Brian Gaff wrote:
I hate to think, you don't expect the guy to tell everyone his voodoo
secrets?
I suppose you also use a valve to do the rectification. I suggest the
5y3 myself, though you need a specially cleaned supply for the
heaters to avoid heater/cathode intermediation distortion....


+1 here on that. Those nasty silicon rectifiers with their harsh, fast
nanosecond switching will place severe stresses on your precious audio
equipment during start up, not to mention generating troublesome radiation
of noise from those ugly sharp switching transients. Using a 5Y3 will solve
these problems by applying HT gradually as/when your valves are ready for it
and, since it is a valve, your HT noise will sound much nicer...warmer and
more soothing.

:-)

"TonyL" wrote

+1 here on that. Those nasty silicon rectifiers with their harsh, fast
nanosecond switching will place severe stresses on your precious audio
equipment during start up, not to mention generating troublesome radiation
of noise from those ugly sharp switching transients. Using a 5Y3 will
solve these problems by applying HT gradually as/when your valves are
ready for it and, since it is a valve, your HT noise will sound much
nicer...warmer and more soothing.


Whilst the 5Y3 will be expensive, short-lived, inefficient and can cause a
lot of damage to other components when it fails. Of course silicon
rectifiers don't actually cause "severe stresses on your precious audio
equipment" if the system has been designed with even a modicum of care. Nor,
for that matter, will they cause "troublesome radiation" either in a
reasonably competent design.

If stress on components is your main concern may I recommend the choke-input
filter? It also provides a far better load regulation than the common
capacitor-input configuration.

David.

David Looser wrote:
"TonyL" wrote
+1 here on that. Those nasty silicon rectifiers with their harsh, fast
nanosecond switching will place severe stresses on your precious audio
equipment during start up, not to mention generating troublesome radiation
of noise from those ugly sharp switching transients. Using a 5Y3 will
solve these problems by applying HT gradually as/when your valves are
ready for it and, since it is a valve, your HT noise will sound much
nicer...warmer and more soothing.


Whilst the 5Y3 will be expensive, short-lived, inefficient and can cause a
lot of damage to other components when it fails. Of course silicon
rectifiers don't actually cause "severe stresses on your precious audio
equipment" if the system has been designed with even a modicum of care. Nor,
for that matter, will they cause "troublesome radiation" either in a
reasonably competent design.


Indeed. Things like resistance and inductance go a long way to smoothing
out peak currents..


If stress on components is your main concern may I recommend the choke-input
filter? It also provides a far better load regulation than the common
capacitor-input configuration.

David.

David Looser wrote:
"TonyL" wrote

+1 here on that. Those nasty silicon rectifiers with their harsh,
fast nanosecond switching will place severe stresses on your
precious audio equipment during start up, not to mention generating
troublesome radiation of noise from those ugly sharp switching
transients. Using a 5Y3 will solve these problems by applying HT
gradually as/when your valves are ready for it and, since it is a
valve, your HT noise will sound much nicer...warmer and more
soothing.

Whilst the 5Y3 will be expensive, short-lived, inefficient and can
cause a lot of damage to other components when it fails. Of course
silicon rectifiers don't actually cause "severe stresses on your
precious audio equipment" if the system has been designed with even a
modicum of care. Nor, for that matter, will they cause "troublesome
radiation" either in a reasonably competent design.

If stress on components is your main concern may I recommend the
choke-input filter? It also provides a far better load regulation
than the common capacitor-input configuration.


Stress in myself is my main concern, rather than in any audio circuit...or
rather minimising it. One method is the use of humour, oodles of it...which
my original post contained.

In article , David Looser
wrote:
"TonyL" wrote

+1 here on that. Those nasty silicon rectifiers with their harsh, fast
nanosecond switching will place severe stresses on your precious
audio equipment during start up, not to mention generating
troublesome radiation of noise from those ugly sharp switching
transients. Using a 5Y3 will solve these problems by applying HT
gradually as/when your valves are ready for it and, since it is a
valve, your HT noise will sound much nicer...warmer and more soothing.


Whilst the 5Y3 will be expensive, short-lived, inefficient and can cause
a lot of damage to other components when it fails. Of course silicon
rectifiers don't actually cause "severe stresses on your precious audio
equipment" if the system has been designed with even a modicum of care.
Nor, for that matter, will they cause "troublesome radiation" either in
a reasonably competent design.

If stress on components is your main concern may I recommend the
choke-input filter? It also provides a far better load regulation than
the common capacitor-input configuration.

If you wish it is also trivially easy to do things like

a) Put small RF caps across diodes to suppress any brief snap

b) build a PSU that ramps up the voltage slowly when first turned on

without needing to use valves for the rectifiers.

Slainte,

Jim

--
Please use the address on the audiomisc page if you wish to email me.
Electronics http://www.st-and.ac.uk/~www_pa/Scot...o/electron.htm
Armstrong Audio http://www.audiomisc.co.uk/Armstrong/armstrong.html
Audio Misc http://www.audiomisc.co.uk/index.html

wrote

The principle is sound, like balanced audio circuits, it uses a
transformer with two secondaries of half the primary voltage,
connected in series, with the junction earthed and the load supplied
across the two outer ends. You could get a suitable transformer made
for much less than Russ charges.

A similar technique has been used for years for power-tools etc. on building
sites, except that the secondary voltage is 110, rather than 240V. The
centre tap of the secondary of the transformer is earthed, thus the voltage
to earth of each conductor is only 55V. As a safety technique it has it's
value, but what is the advantage when feeding audio equipment?

David.