[Eeyore]

Hi Iain,

I've been chewing over that short and long chain issue wrt power supply
smoothing.

Did you have any particular component values in mind I could plug into some
equations ?

Graham

[Sander deWaal]

Eeyore said:

Hi Iain,

I've been chewing over that short and long chain issue wrt power supply
smoothing.

Did you have any particular component values in mind I could plug into some
equations ?


See:
http://www.duncanamps.com/psud2/index.html

A "stripped" simulator, that works surprisingly good for tube power
supplies.


--
- Ever seen someone with 5.1 ears? So, what does that tell you? -

[Eeyore]

Sander deWaal wrote:

Eeyore said:

Hi Iain,

I've been chewing over that short and long chain issue wrt power supply
smoothing.

Did you have any particular component values in mind I could plug into some
equations ?

See:
http://www.duncanamps.com/psud2/index.html

A "stripped" simulator, that works surprisingly good for tube power
supplies.

Interesting. I'll look into that. Cheers Sander.


--
- Ever seen someone with 5.1 ears? So, what does that tell you? -

Another interesting subject.

Who else finds 'surround sound' distracting rather than beneficial to music
listening ?

Graham

[Iain Churches]

"Eeyore" wrote in message
...
Hi Iain,

I've been chewing over that short and long chain issue wrt power supply
smoothing.

Did you have any particular component values in mind I could plug into
some
equations ?

Graham


Hi Graham.

The two ends of the spectrum seem to be:

16µF-5H-16µF
and
200µF-20H-200µF-10H-470µF-R-470µF

I have seen several examples of both. On the last
example of the second type, the R was 5k5.
with the phase splitter and the front end fed from
the last two caps respectively

Best regards
Iain

[Eeyore]

Iain Churches wrote:

"Eeyore" wrote in message

Hi Iain,

I've been chewing over that short and long chain issue wrt power supply
smoothing.

Did you have any particular component values in mind I could plug into
some equations ?

Graham

Hi Graham.

The two ends of the spectrum seem to be:

16µF-5H-16µF
and
200µF-20H-200µF-10H-470µF-R-470µF

I have seen several examples of both. On the last
example of the second type, the R was 5k5.
with the phase splitter and the front end fed from
the last two caps respectively

My goodness ! They're *that* different. For what kind of output power ( and B+ )
was this ?

Graham

[Iain Churches]

"Eeyore" wrote in message
...


Iain Churches wrote:

"Eeyore" wrote in message

Hi Iain,

I've been chewing over that short and long chain issue wrt power supply
smoothing.

Did you have any particular component values in mind I could plug into
some equations ?

Graham

Hi Graham.

The two ends of the spectrum seem to be:

16µF-5H-16µF
and
200µF-20H-200µF-10H-470µF-R-470µF

I have seen several examples of both. On the last
example of the second type, the R was 5k5.
with the phase splitter and the front end fed from
the last two caps respectively

My goodness ! They're *that* different. For what kind of output power (
and B+ )
was this ?



Yes, quite a contrast, particularly as both amps came from the same stable.
The builder produces exactly what the customer wants (or thinks he wants:-)
And you know how the customer is always right:-))

The first "short chain" amp was an 25W EL34 PP amp with a cascode front end.
There was 420V on the B+

The second was a PPP with two pairs of 6550 per channel. B+ at 600V

Both sounded very good indeed. The big amp was totally silent when idling
in ETS (ear to speaker) test. I got the impression that the bigger amp
sounded
more effortless in sffz orchestral passages when playing at the same level
as its little
brother. I wondered if the stiffer psu contributed to this.

Iain

[Sander deWaal]

Eeyore said:


- Ever seen someone with 5.1 ears? So, what does that tell you? -


Another interesting subject.


Hmmm.........there's some discussion about my sig going on in RAO at
the moment ;-)


--
- Ever seen someone with 5.1 ears? So, what does that tell you? -

[[email protected]]

Iain Churches wrote:
"Eeyore" wrote in message
...


Iain Churches wrote:

"Eeyore" wrote in message

Hi Iain,

I've been chewing over that short and long chain issue wrt power supply
smoothing.

Did you have any particular component values in mind I could plug into
some equations ?

Graham

Hi Graham.

The two ends of the spectrum seem to be:

16µF-5H-16µF
and
200µF-20H-200µF-10H-470µF-R-470µF

I have seen several examples of both. On the last
example of the second type, the R was 5k5.
with the phase splitter and the front end fed from
the last two caps respectively

My goodness ! They're *that* different. For what kind of output power (
and B+ )
was this ?



Yes, quite a contrast, particularly as both amps came from the same stable.
The builder produces exactly what the customer wants (or thinks he wants:-)
And you know how the customer is always right:-))

The first "short chain" amp was an 25W EL34 PP amp with a cascode front end.
There was 420V on the B+

The second was a PPP with two pairs of 6550 per channel. B+ at 600V

Both sounded very good indeed. The big amp was totally silent when idling
in ETS (ear to speaker) test. I got the impression that the bigger amp
sounded
more effortless in sffz orchestral passages when playing at the same level
as its little
brother. I wondered if the stiffer psu contributed to this.

I compared a 92 Geo Metro with a 2006 Ford Mustang. The Mustang felt
like it had more power. I wonder if it was the Air Freshener hanging
from the rearview mirror.

:-).

Tim.