\"High-end Audio\"...

[Jasen Betts]

On 2022-09-26, Ricky <gnuarm.deletethisbit@gmail.com> wrote:

On Monday, September 26, 2022 at 3:37:00 PM UTC-4, lang...@fonz.dk wrote:
mandag den 26. september 2022 kl. 20.57.08 UTC+2 skrev Cursitor Doom:
On Mon, 26 Sep 2022 10:28:45 -0700 (PDT), John Walliker
jrwal...@gmail.com> wrote:
On Monday, 26 September 2022 at 17:02:48 UTC+1, John Larkin wrote:
On Mon, 26 Sep 2022 13:38:06 +0100, Cursitor Doom <c...@notformail.com
wrote:


\"Based in Berlin, Germany, HiFi TUNiNG has spent an incredible amount
of time and money to ensure you can get 100% out of your system. A
strong belief in \'The chain is only as strong as its weakest link\'
pushes HiFi TUNiNG to ensure that no stone is left unturned when
improving every component within Hi-Fi systems. This leads to offering
a series of products aimed at improving components commonly forgotten,
for an affordable price.\"

A most remarkable product!

https://www.futureshop.co.uk/hifi-tuning-uk-supreme-3-mains-fuse-13a

:-D
Fast blow ensures they will be replaced often. Inner microgranularity
and soundstage distance imaging suffer if the fuses are too old.

Just to add to the fun, fuses in series with a speaker DO generate odd
harmonic distortion when operated close to their rated current, especially
at very low frequencies. Whether this is actually audible is another matter,
but it is certainly measurable and is much greater than the distortion from
any reasonably good amplifier.
See reply no. 3 in this discussion:
https://www.eevblog.com/forum/dodgy-technology/speaker-fuse-nonlinearity-at-rated-current/

John
Ah, \"bottle-neck distortion\" rears its ugly head. In order to conquor
that, you need a better fuse! And here it is:

https://www.futureshop.co.uk/quantum-science-audio-silver-extreme-level-uk-13a-fuse

A bit expensive at $4,500 admittedly, but I\'m sure it\'s worth every
penny!
I can\'t imagine it isn\'t just a money laundering scheme

You mean they sell these to themselves? How would you transfer the
\"dirty\" money to the company selling the crap?

send the money to shills and have them order the things.

--
Jasen.

 

[Cursitor Doom]

On Tue, 27 Sep 2022 03:37:04 -0000 (UTC), Jasen Betts
<usenet@revmaps.no-ip.org> wrote:

On 2022-09-26, Ricky <gnuarm.deletethisbit@gmail.com> wrote:
On Monday, September 26, 2022 at 3:37:00 PM UTC-4, lang...@fonz.dk wrote:
mandag den 26. september 2022 kl. 20.57.08 UTC+2 skrev Cursitor Doom:
On Mon, 26 Sep 2022 10:28:45 -0700 (PDT), John Walliker
jrwal...@gmail.com> wrote:
On Monday, 26 September 2022 at 17:02:48 UTC+1, John Larkin wrote:
On Mon, 26 Sep 2022 13:38:06 +0100, Cursitor Doom <c...@notformail.com
wrote:


\"Based in Berlin, Germany, HiFi TUNiNG has spent an incredible amount
of time and money to ensure you can get 100% out of your system. A
strong belief in \'The chain is only as strong as its weakest link\'
pushes HiFi TUNiNG to ensure that no stone is left unturned when
improving every component within Hi-Fi systems. This leads to offering
a series of products aimed at improving components commonly forgotten,
for an affordable price.\"

A most remarkable product!

https://www.futureshop.co.uk/hifi-tuning-uk-supreme-3-mains-fuse-13a

:-D
Fast blow ensures they will be replaced often. Inner microgranularity
and soundstage distance imaging suffer if the fuses are too old.

Just to add to the fun, fuses in series with a speaker DO generate odd
harmonic distortion when operated close to their rated current, especially
at very low frequencies. Whether this is actually audible is another matter,
but it is certainly measurable and is much greater than the distortion from
any reasonably good amplifier.
See reply no. 3 in this discussion:
https://www.eevblog.com/forum/dodgy-technology/speaker-fuse-nonlinearity-at-rated-current/

John
Ah, \"bottle-neck distortion\" rears its ugly head. In order to conquor
that, you need a better fuse! And here it is:

https://www.futureshop.co.uk/quantum-science-audio-silver-extreme-level-uk-13a-fuse

A bit expensive at $4,500 admittedly, but I\'m sure it\'s worth every
penny!
I can\'t imagine it isn\'t just a money laundering scheme

You mean they sell these to themselves? How would you transfer the
\"dirty\" money to the company selling the crap?

send the money to shills and have them order the things.

Like the Albanian \'barber shops\' springing up everywhere in the UK
that never seem to have any customers...

 

[TTman]

A most remarkable product!

https://www.futureshop.co.uk/hifi-tuning-uk-supreme-3-mains-fuse-13a

:-D

Wow! 12 month warranty. If it blows, do they replace it for free?

I\'d love to see someone do an AB comparison test! LOL

This fuse is much better value for money...

https://www.futureshop.co.uk/quantum-science-audio-yellow-high-end-uk13a-fuse

And their mains cables are to die for...A snip at £1500

https://www.futureshop.co.uk/audioquest-hurricane-high-current-mains-power-cable

Who on earth buys this stuff, believing it makes a difference ?





--
This email has been checked for viruses by Avast antivirus software.
www.avast.com

 

[TTman]

On 26/09/2022 20:07, Ricky wrote:

On Monday, September 26, 2022 at 8:38:16 AM UTC-4, Cursitor Doom wrote:
\"Based in Berlin, Germany, HiFi TUNiNG has spent an incredible amount
of time and money to ensure you can get 100% out of your system. A
strong belief in \'The chain is only as strong as its weakest link\'
pushes HiFi TUNiNG to ensure that no stone is left unturned when
improving every component within Hi-Fi systems. This leads to offering
a series of products aimed at improving components commonly forgotten,
for an affordable price.\"

A most remarkable product!

https://www.futureshop.co.uk/hifi-tuning-uk-supreme-3-mains-fuse-13a

:-D

Wow! 12 month warranty. If it blows, do they replace it for free?

I\'d love to see someone do an AB comparison test! LOL

It gets worse... A fuse for £1400 ??? FFS
https://www.futureshop.co.uk/quantum-science-audio-red-high-level-uk-13a-fuse




--
This email has been checked for viruses by Avast antivirus software.
www.avast.com

 

[server]

TTman <kraken.sankey@gmail.com> wrote in
news:tgv0ej$2td7$1@dont-email.me:

And their mains cables are to die for...A snip at ¶œ1500

https://www.futureshop.co.uk/audioquest-hurricane-high-current-main
s-power-cable

Who on earth buys this stuff, believing it makes a difference ?

The most dopey idiots on the planet.

They would be much better off buying a quality line conditioner.

https://www.ebay.com/itm/292288732842

 

[Rich S]

On Monday, September 26, 2022 at 12:38:16 PM UTC, Cursitor Doom wrote:

\"Based in Berlin, Germany, HiFi TUNiNG has spent an incredible amount
of time and money to ensure you can get 100% out of your system. A
strong belief in \'The chain is only as strong as its weakest link\'
pushes HiFi TUNiNG to ensure that no stone is left unturned when
improving every component within Hi-Fi systems. This leads to offering
a series of products aimed at improving components commonly forgotten,
for an affordable price.\"

A most remarkable product!

https://www.futureshop.co.uk/hifi-tuning-uk-supreme-3-mains-fuse-13a

:-D

wow. Gold plated contacts, black ceramic body -
that is the prettiest fuse I\'ve ever seen.
must be meant for \"glass windowed\" power supplies ;-)
(those show piece amplifiers you see at high shows)

 

[Rich S]

\"Please note: fuses are directional, so please ensure you install your
fuse accordingly. If you are not sure on the correct direction, simply
try it both ways- you will be able to hear the difference.\"

So make sure you fit it the correct way round!
;-)

FINALLY the dark secrets of electronics are leaked!
I have been installing all my parts in random ways.
I never knew, resistors, capacitors, fuses, ..wow.
No wonder then they all sounded terrible.
Those poor little critters must have been tortured
so forced to conduct electricity the wrong way.

 

[Phil Hobbs]

Rich S wrote:

\"Please note: fuses are directional, so please ensure you install your
fuse accordingly. If you are not sure on the correct direction, simply
try it both ways- you will be able to hear the difference.\"

So make sure you fit it the correct way round!
;-)

FINALLY the dark secrets of electronics are leaked!
I have been installing all my parts in random ways.
I never knew, resistors, capacitors, fuses, ..wow.
No wonder then they all sounded terrible.
Those poor little critters must have been tortured
so forced to conduct electricity the wrong way.

It woz t\'diodes wot did it.

Cheers

Phil Hobbs

--
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC / Hobbs ElectroOptics
Optics, Electro-optics, Photonics, Analog Electronics
Briarcliff Manor NY 10510

http://electrooptical.net
http://hobbs-eo.com

 

[RichD]

On September 26, Cursitor Doom wrote:

\"Based in Berlin, Germany, HiFi TUNiNG has spent an incredible amount
of time and money to ensure you can get 100% out of your system. A
strong belief in \'The chain is only as strong as its weakest link\'
pushes HiFi TUNiNG to ensure that no stone is left unturned when
improving every component within Hi-Fi systems.\"
https://www.futureshop.co.uk/hifi-tuning-uk-supreme-3-mains-fuse-13a

Well, at least they got the ensure/insure usage right -

However, I\'m skeptical of the amount of money they spent,
since they claim it was \"incredible\".

Anyway, is there any audio beef in the propaganda regarding
Monster cable, with their near zero resistance and inductance?


--
Rich

 

[Rich S]

On Tuesday, September 27, 2022 at 7:34:25 PM UTC, Phil Hobbs wrote:

Rich S wrote:

\"Please note: fuses are directional, so please ensure you install your
fuse accordingly. If you are not sure on the correct direction, simply
try it both ways- you will be able to hear the difference.\"

So make sure you fit it the correct way round!
;-)

FINALLY the dark secrets of electronics are leaked!
I have been installing all my parts in random ways.
I never knew, resistors, capacitors, fuses, ..wow.
No wonder then they all sounded terrible.
Those poor little critters must have been tortured
so forced to conduct electricity the wrong way.

It woz t\'diodes wot did it.

Cheers

Phil Hobbs

--
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC / Hobbs ElectroOptics
Optics, Electro-optics, Photonics, Analog Electronics
Briarcliff Manor NY 10510

http://electrooptical.net
http://hobbs-eo.com

was the bands of cathodes that led young boys astray ;-)

 

[server]

Rich S <richsulinengineer@gmail.com> wrote in news:1d49e4b2-cb87-4a7b-
9dca-c531c8cbed81n@googlegroups.com:

wow. Gold plated contacts, black ceramic body -
that is the prettiest fuse I\'ve ever seen.
must be meant for \"glass windowed\" power supplies ;-)
(those show piece amplifiers you see at high shows)

Probably only a microinch of Gold (i forgot... metric)
2.54 -5 mm

Probably scrapes off on insertion.

 

[server]

Rich S <richsulinengineer@gmail.com> wrote in
news:e2ff09dc-7866-4f25-8295-ff40f10166den@googlegroups.com:

On Tuesday, September 27, 2022 at 7:34:25 PM UTC, Phil Hobbs
wrote:
Rich S wrote:

\"Please note: fuses are directional, so please ensure you
install your fuse accordingly. If you are not sure on the
correct direction, simply try it both ways- you will be able
to hear the difference.\"

So make sure you fit it the correct way round!
;-)

FINALLY the dark secrets of electronics are leaked!
I have been installing all my parts in random ways.
I never knew, resistors, capacitors, fuses, ..wow.
No wonder then they all sounded terrible.
Those poor little critters must have been tortured
so forced to conduct electricity the wrong way.

It woz t\'diodes wot did it.

Cheers

Phil Hobbs

--
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC / Hobbs ElectroOptics
Optics, Electro-optics, Photonics, Analog Electronics
Briarcliff Manor NY 10510

http://electrooptical.net
http://hobbs-eo.com

was the bands of cathodes that led young boys astray ;-)

They could only ever play half the music.

 

[John Larkin]

On Tue, 27 Sep 2022 17:04:23 -0700 (PDT), Rich S
<richsulinengineer@gmail.com> wrote:

On Tuesday, September 27, 2022 at 7:34:25 PM UTC, Phil Hobbs wrote:
Rich S wrote:

\"Please note: fuses are directional, so please ensure you install your
fuse accordingly. If you are not sure on the correct direction, simply
try it both ways- you will be able to hear the difference.\"

So make sure you fit it the correct way round!
;-)

FINALLY the dark secrets of electronics are leaked!
I have been installing all my parts in random ways.
I never knew, resistors, capacitors, fuses, ..wow.
No wonder then they all sounded terrible.
Those poor little critters must have been tortured
so forced to conduct electricity the wrong way.

It woz t\'diodes wot did it.

Cheers

Phil Hobbs

--
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC / Hobbs ElectroOptics
Optics, Electro-optics, Photonics, Analog Electronics
Briarcliff Manor NY 10510

http://electrooptical.net
http://hobbs-eo.com

was the bands of cathodes that led young boys astray ;-)

Diode: band marks the cathode

Bridge rectifier: + marks the pos output

Tantalum cap: mark the positive

Aluminum cap: mark the negative

Film cap: mark the outside foil, if any

LED: do something random

IC pin 1: optional

DVM: red is ohms +, except in Japan.

Military: current flows backwards

LT Spice: current flows right to left

 

[server]

On Mon, 26 Sep 2022 12:12:34 -0700 (PDT), Ricky
<gnuarm.deletethisbit@gmail.com> wrote:

On Monday, September 26, 2022 at 11:51:50 AM UTC-4, Cursitor Doom wrote:
On Mon, 26 Sep 2022 13:14:35 GMT, Jan Panteltje
pNaonSt...@yahoo.com> wrote:

On a sunny day (Mon, 26 Sep 2022 13:38:06 +0100) it happened Cursitor Doom
c...@notformail.com> wrote in <i373jh9uc971pjqoq...@4ax.com>:



\"Based in Berlin, Germany, HiFi TUNiNG has spent an incredible amount
of time and money to ensure you can get 100% out of your system. A
strong belief in \'The chain is only as strong as its weakest link\'
pushes HiFi TUNiNG to ensure that no stone is left unturned when
improving every component within Hi-Fi systems. This leads to offering
a series of products aimed at improving components commonly forgotten,
for an affordable price.\"

A most remarkable product!

https://www.futureshop.co.uk/hifi-tuning-uk-supreme-3-mains-fuse-13a

They did not even give the i^2R rating for that fuse.

\"High end\" amplifiers tend to have oversized capacitors in the power
supply to keep the DC supply voltage stable for problematic signals
and/or problematic speakers. This means that the capacitor voltage is
close to the peak voltage of the rectified transformer voltage.

Thus the rectifiers conduct only close to the mains peak voltage.
However, the total load power must be delivered during this short
conduction angle, thus the peak current must be many times larger than
the load to a resistive load. Thus the fuse i^2R heating is also much
greater, increasing the risk for blowing the fuse. Thus the i^2R
rating should be greater than the i^2R ratings for an ordinary fuse
with some nominal current value. this very high peak current (often
tens of amps) will cause extra power losses in house wirings as well
as extra voltage losses, so the voltage delivered to the amplifier
looks more like a flat top sine wave i,e, lots of harmonics.

In many countries the peak most be widened with some PFC usually
consisting of some boost switcher. \' HE\' people usually do not like
switchers in power supplies or audio amplifiers, so wonder how they
are going to sell their equipment into countries with power factor
regulations :--)

In \'merrica it was a plot to sell cocaine
expensive audio crap shops were part of that.

No real audio guy would fall for this one, but the tube can hold just that much.
So,
Here\'s another innovative product in a similar vein...

https://www.futureshop.co.uk/quantum-science-audio-yellow-slow-blow

\"Please note: fuses are directional, so please ensure you install your
fuse accordingly. If you are not sure on the correct direction, simply
try it both ways- you will be able to hear the difference.\"

So make sure you fit it the correct way round!
;-)

I wonder if they get their power from the Quantum Science generating station with the proper orientation of all equipment involved. Does the grid identify the polarity of their transformers? What if the three phase is rotating in the other direction? Oh, the humanity!

Do they sell three phase power supplies ? These would be quite ideal
for feeding \'HE\' amplifiers, not much need for storage capacitors even
for feeding problematic loads. The mains conduction angles are greater
and hence peak currents smaller even with just a 6 pulse rectifier.
With a 12 pulse rectifier (requiring extra addition mains transformer
secondary windings for both wye and delta connection), this will clean
up the current drawn and no extra circuits are needed to mains power
factor requirements in most counties.

Some may complain that they currently have single phase mains feed,
but in most places a three phase feed is available with a reasonable
amount of money, compared to the sums someone spend for audio
interconnection cables .

 

[Jan Panteltje]

On a sunny day (Mon, 03 Oct 2022 16:40:09 +0300) it happened
upsidedown@downunder.com wrote in
<8llljhhpn2vjq3jtsffsg81skae2t5v3us@4ax.com>:

On Mon, 26 Sep 2022 12:12:34 -0700 (PDT), Ricky
gnuarm.deletethisbit@gmail.com> wrote:

\"High end\" amplifiers tend to have oversized capacitors in the power
supply to keep the DC supply voltage stable for problematic signals
and/or problematic speakers. This means that the capacitor voltage is
close to the peak voltage of the rectified transformer voltage.

Thus the rectifiers conduct only close to the mains peak voltage.
However, the total load power must be delivered during this short
conduction angle, thus the peak current must be many times larger than
the load to a resistive load. Thus the fuse i^2R heating is also much
greater, increasing the risk for blowing the fuse. Thus the i^2R
rating should be greater than the i^2R ratings for an ordinary fuse
with some nominal current value. this very high peak current (often
tens of amps) will cause extra power losses in house wirings as well
as extra voltage losses, so the voltage delivered to the amplifier
looks more like a flat top sine wave i,e, lots of harmonics.

In many countries the peak most be widened with some PFC usually
consisting of some boost switcher. \' HE\' people usually do not like
switchers in power supplies or audio amplifiers, so wonder how they
are going to sell their equipment into countries with power factor
regulations :--)

You can use a big inductor after the mains bridge rectifier and before the filter cap.
Some audio guys like big transformers anyways.

And usually music peaks only ever so often, no continuously max current.

 

[Ricky]

On Monday, October 3, 2022 at 11:14:09 AM UTC-4, Jan Panteltje wrote:

On a sunny day (Mon, 03 Oct 2022 16:40:09 +0300) it happened
upsid...@downunder.com wrote in
8llljhhpn2vjq3jts...@4ax.com>:
On Mon, 26 Sep 2022 12:12:34 -0700 (PDT), Ricky
gnuarm.del...@gmail.com> wrote:

\"High end\" amplifiers tend to have oversized capacitors in the power
supply to keep the DC supply voltage stable for problematic signals
and/or problematic speakers. This means that the capacitor voltage is
close to the peak voltage of the rectified transformer voltage.

Thus the rectifiers conduct only close to the mains peak voltage.
However, the total load power must be delivered during this short
conduction angle, thus the peak current must be many times larger than
the load to a resistive load. Thus the fuse i^2R heating is also much
greater, increasing the risk for blowing the fuse. Thus the i^2R
rating should be greater than the i^2R ratings for an ordinary fuse
with some nominal current value. this very high peak current (often
tens of amps) will cause extra power losses in house wirings as well
as extra voltage losses, so the voltage delivered to the amplifier
looks more like a flat top sine wave i,e, lots of harmonics.

In many countries the peak most be widened with some PFC usually
consisting of some boost switcher. \' HE\' people usually do not like
switchers in power supplies or audio amplifiers, so wonder how they
are going to sell their equipment into countries with power factor
regulations :--)
You can use a big inductor after the mains bridge rectifier and before the filter cap.
Some audio guys like big transformers anyways.

And usually music peaks only ever so often, no continuously max current.

That doesn\'t actually impact the power factor issue. The power factor is mucked by the large capacitance relative to the load. So the lower power draws are when the power factor is most blorged.

The inductor would definitely help, but it would need to be large, just like the capacitors are large.

--

Rick C.

--- Get 1,000 miles of free Supercharging
--- Tesla referral code - https://ts.la/richard11209

 

[Jan Panteltje]

On a sunny day (Mon, 3 Oct 2022 08:26:37 -0700 (PDT)) it happened Ricky
<gnuarm.deletethisbit@gmail.com> wrote in
<5e9699de-ba98-4e07-b70a-2e3c47dfec78n@googlegroups.com>:

On Monday, October 3, 2022 at 11:14:09 AM UTC-4, Jan Panteltje wrote:
On a sunny day (Mon, 03 Oct 2022 16:40:09 +0300) it happened

You can use a big inductor after the mains bridge rectifier and before the filter cap.
Some audio guys like big transformers anyways.

And usually music peaks only ever so often, no continuously max current.

That doesn\'t actually impact the power factor issue. The power factor is mucked by the large capacitance relative to the load.
So the lower power draws are when the power factor is most blorged.

Indeed

>The inductor would definitely help, but it would need to be large, just like the capacitors are large.

Yes.

As to HE audio, I remember in the early sixties going to a church where some group was playing classical music
they had Quad electrostats, I was blown out by the quality of sound..
Later in the TV studios we had 2 Quad elecrostats in each sound control room.. (6 studios back then in that complex).

Sometimes I wonder if I should not get some, quite expensive these days,
But many times better than piezo tweeters etc for the highs, very transparent sound.

 

[server]

On Mon, 03 Oct 2022 15:12:02 GMT, Jan Panteltje
<pNaonStpealmtje@yahoo.com> wrote:

On a sunny day (Mon, 03 Oct 2022 16:40:09 +0300) it happened
upsidedown@downunder.com wrote in
8llljhhpn2vjq3jtsffsg81skae2t5v3us@4ax.com>:

On Mon, 26 Sep 2022 12:12:34 -0700 (PDT), Ricky
gnuarm.deletethisbit@gmail.com> wrote:

\"High end\" amplifiers tend to have oversized capacitors in the power
supply to keep the DC supply voltage stable for problematic signals
and/or problematic speakers. This means that the capacitor voltage is
close to the peak voltage of the rectified transformer voltage.

Thus the rectifiers conduct only close to the mains peak voltage.
However, the total load power must be delivered during this short
conduction angle, thus the peak current must be many times larger than
the load to a resistive load. Thus the fuse i^2R heating is also much
greater, increasing the risk for blowing the fuse. Thus the i^2R
rating should be greater than the i^2R ratings for an ordinary fuse
with some nominal current value. this very high peak current (often
tens of amps) will cause extra power losses in house wirings as well
as extra voltage losses, so the voltage delivered to the amplifier
looks more like a flat top sine wave i,e, lots of harmonics.

In many countries the peak most be widened with some PFC usually
consisting of some boost switcher. \' HE\' people usually do not like
switchers in power supplies or audio amplifiers, so wonder how they
are going to sell their equipment into countries with power factor
regulations :--)

You can use a big inductor after the mains bridge rectifier and before the filter cap.
Some audio guys like big transformers anyways.

In the tube rectifier era, the pi-configuration (CLC) was common to
limit the rectifier current peaks. In many cases the main choke was
physically nearly as big as the output transformer.


>And usually music peaks only ever so often, no continuously max current.

Think about reproducing a low note (<30 Hz) from a big pipe organ,
requires multiple mains cycles to drive a full organ cycle.

 

[Ricky]

On Monday, October 3, 2022 at 3:08:21 PM UTC-4, upsid...@downunder.com wrote:

On Mon, 03 Oct 2022 15:12:02 GMT, Jan Panteltje
pNaonSt...@yahoo.com> wrote:

On a sunny day (Mon, 03 Oct 2022 16:40:09 +0300) it happened
upsid...@downunder.com wrote in
8llljhhpn2vjq3jts...@4ax.com>:

On Mon, 26 Sep 2022 12:12:34 -0700 (PDT), Ricky
gnuarm.del...@gmail.com> wrote:

\"High end\" amplifiers tend to have oversized capacitors in the power
supply to keep the DC supply voltage stable for problematic signals
and/or problematic speakers. This means that the capacitor voltage is
close to the peak voltage of the rectified transformer voltage.

Thus the rectifiers conduct only close to the mains peak voltage.
However, the total load power must be delivered during this short
conduction angle, thus the peak current must be many times larger than
the load to a resistive load. Thus the fuse i^2R heating is also much
greater, increasing the risk for blowing the fuse. Thus the i^2R
rating should be greater than the i^2R ratings for an ordinary fuse
with some nominal current value. this very high peak current (often
tens of amps) will cause extra power losses in house wirings as well
as extra voltage losses, so the voltage delivered to the amplifier
looks more like a flat top sine wave i,e, lots of harmonics.

In many countries the peak most be widened with some PFC usually
consisting of some boost switcher. \' HE\' people usually do not like
switchers in power supplies or audio amplifiers, so wonder how they
are going to sell their equipment into countries with power factor
regulations :--)

You can use a big inductor after the mains bridge rectifier and before the filter cap.
Some audio guys like big transformers anyways.
In the tube rectifier era, the pi-configuration (CLC) was common to
limit the rectifier current peaks. In many cases the main choke was
physically nearly as big as the output transformer.

I think you misunderstand. In the tube era, the power filter was important to reduce the ripple feeding the circuits because they seldom used voltage regulators. Tube rectifiers were seldom other than half wave to boot!

--

Rick C.

--+ Get 1,000 miles of free Supercharging
--+ Tesla referral code - https://ts.la/richard11209

 

[ke...@kjwdesigns.com]

On Monday, 3 October 2022 at 13:37:37 UTC-7, Ricky wrote:

On Monday, October 3, 2022 at 3:08:21 PM UTC-4, upsid...@downunder.com wrote:
....
In the tube rectifier era, the pi-configuration (CLC) was common to
limit the rectifier current peaks. In many cases the main choke was
physically nearly as big as the output transformer.
I think you misunderstand. In the tube era, the power filter was important to reduce the ripple feeding the circuits because they seldom used voltage regulators. Tube rectifiers were seldom other than half wave to boot!

The most common arrangement used a dual anode rectifier fed from a centre-tapped secondary of the mains transformer. So it was effectively full-wave.

TVs and radios that were powered directly from the power line without a transformer invariably used half-wave rectification.

kw