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P
Phil Allison
Guest
Don the Dope wrote:
** You have noticed the Callins is in an epoxy sealed container?
Regular electros are in a rubber bung sealed can.
Which would you think is better for keeping the juice in ?
....... Phil
------------------------------
Why pay more for a Callins back in the day? Why not buy
twice as many electrolytics in cans to get a better price break?
** You have noticed the Callins is in an epoxy sealed container?
Regular electros are in a rubber bung sealed can.
Which would you think is better for keeping the juice in ?
....... Phil
C
Cydrome Leader
Guest
Phil Allison <pallison49@gmail.com> wrote:
Vishay probably still makes the epoxy sealed capacitors. I believe the
goal is to keep stuff (halogens or solvents?) out of the capacitor vs.
increasing life.
Don the Dope wrote:
------------------------------
Why pay more for a Callins back in the day? Why not buy
twice as many electrolytics in cans to get a better price break?
** You have noticed the Callins is in an epoxy sealed container?
Regular electros are in a rubber bung sealed can.
Which would you think is better for keeping the juice in ?
...... Phil
Vishay probably still makes the epoxy sealed capacitors. I believe the
goal is to keep stuff (halogens or solvents?) out of the capacitor vs.
increasing life.
P
Phil Allison
Guest
Cydrome Leader wrote:
---------------------------------------
** Bullshit.
..... Phil
---------------------------------------
Vishay probably still makes the epoxy sealed capacitors. I believe the
goal is to keep stuff (halogens or solvents?) out of the capacitor vs.
increasing life.
** Bullshit.
..... Phil
P
Phil Allison
Guest
Don the Dope wrote:
-------------------------------
** You did not answer mine - fuckhead.
Why ?
...... Phil
-------------------------------
the Callins is in an epoxy sealed container
Interesting, but it doesn\'t answer my question:
** You did not answer mine - fuckhead.
Why ?
...... Phil
J
Joe Gwinn
Guest
On Sat, 12 Dec 2020 09:23:52 -0800, jlarkin@highlandsniptechnology.com
wrote:
Audiophool market.
For a number of years, I was involved with pickups for electric
guitars. (A friend of mine made such guitars.) These pickups are
variable-reluctance, sensing motion of the steel guitar strings.
There were many debates on the relative acoustic goodness of this or
that picky/capacitor/design/etc.
What was missing was double-blind A-B comparisons. Now in music,
double blind comparions are in fact common: When one applies for an
orchestra job, it is typical for there to be a screen between the
candidate and the audience of musicians. Neither can see the other,
and the audience does not know which candidtae is playing.
Also mixssing was precise measurements of such things as component
capacitance and coil self-capacitance. These vary by at least +/-
20%, and often 50%, which is easily heard, and was confounding the
debates - supposed apple-apple A-B comparisons had inadvertently let a
kumquat into the picture.
>I wonder how many of these sorts of things are Chinese fakes.
Many. And Americans have been known to partake as well. And there is
a German firm that patented a coaxial dispersion compensator that
claimed mitigate dispersion in coaxial audio cables. The patent does
make electrical sense, and achieves a max compensation of ten
picoseconds.
Which at 20 KHz is a phase error of 1.25 microradians. Can we even
measure such a thing, let alone hear it? But the Germans knew that
their audience had no idea what a picosecond might be.
Joe Gwinn
wrote:
On Fri, 11 Dec 2020 19:31:10 -0500, legg <legg@nospam.magma.ca> wrote:
On Fri, 11 Dec 2020 08:55:19 -0800, jlarkin@highlandsniptechnology.com
wrote:
On Fri, 11 Dec 2020 16:13:22 -0000 (UTC), \"Don\" <g@crcomp.net> wrote:
Greetings,
Why do Callins capacitors command such a high premium:
https://richelectronics.co.uk/product/callins-300uf-25v-audio-capacitor-vintage-low-esr-ol0382b
What\'s so special about them?
What\'s a good substitute?
Danke,
Is that a non-polar electrolytic? Looks like two regular caps potted.
What use is a 300 uF non-polar \'lytic?
Crossover network?
I also saw something of a similar value in a Hafler preamp parts list,
(and another smaller value) though I couldn\'t locate it on the
schematis..
RL
The old bakelite Black Beauty film (or maybe paper?) caps are highly
prized/priced because some people can hear the difference.
If I paid $25 for a 0.022 uF cap, I bet I could hear the difference.
Audiophool market.
For a number of years, I was involved with pickups for electric
guitars. (A friend of mine made such guitars.) These pickups are
variable-reluctance, sensing motion of the steel guitar strings.
There were many debates on the relative acoustic goodness of this or
that picky/capacitor/design/etc.
What was missing was double-blind A-B comparisons. Now in music,
double blind comparions are in fact common: When one applies for an
orchestra job, it is typical for there to be a screen between the
candidate and the audience of musicians. Neither can see the other,
and the audience does not know which candidtae is playing.
Also mixssing was precise measurements of such things as component
capacitance and coil self-capacitance. These vary by at least +/-
20%, and often 50%, which is easily heard, and was confounding the
debates - supposed apple-apple A-B comparisons had inadvertently let a
kumquat into the picture.
>I wonder how many of these sorts of things are Chinese fakes.
Many. And Americans have been known to partake as well. And there is
a German firm that patented a coaxial dispersion compensator that
claimed mitigate dispersion in coaxial audio cables. The patent does
make electrical sense, and achieves a max compensation of ten
picoseconds.
Which at 20 KHz is a phase error of 1.25 microradians. Can we even
measure such a thing, let alone hear it? But the Germans knew that
their audience had no idea what a picosecond might be.
Joe Gwinn
P
Piotr Wyderski
Guest
Phil Allison wrote:
The rubber seals can be pretty robust, if you can spend more. One example:
https://pl.mouser.com/datasheet/2/88/MLP-17492.pdf
But if it must be robust, why would you use an electrolytic capacitor in
the first place? This one doesn\'t have any juice inside and is much
cheaper than the MLPs:
https://pl.mouser.com/datasheet/2/427/mkp1848dcl-1762560.pdf
> Which would you think is better for keeping the juice in ?
In the long run, none. If there is no metal to glass seal, the juice
will find its way out.
Best regards, Piotr
** You have noticed the Callins is in an epoxy sealed container?
Regular electros are in a rubber bung sealed can.
The rubber seals can be pretty robust, if you can spend more. One example:
https://pl.mouser.com/datasheet/2/88/MLP-17492.pdf
But if it must be robust, why would you use an electrolytic capacitor in
the first place? This one doesn\'t have any juice inside and is much
cheaper than the MLPs:
https://pl.mouser.com/datasheet/2/427/mkp1848dcl-1762560.pdf
> Which would you think is better for keeping the juice in ?
In the long run, none. If there is no metal to glass seal, the juice
will find its way out.
Best regards, Piotr
S
Steve Wilson
Guest
Piotr Wyderski <peter.pan@neverland.mil> wrote:
Thanks - very good info. The poly numbers are amazing. Why use tantalums,
especially when JL says to derate them by a factor of three.
--
The best designs occur in the theta state. - sw
Phil Allison wrote:
** You have noticed the Callins is in an epoxy sealed container?
Regular electros are in a rubber bung sealed can.
The rubber seals can be pretty robust, if you can spend more. One
example:
https://pl.mouser.com/datasheet/2/88/MLP-17492.pdf
But if it must be robust, why would you use an electrolytic capacitor
in the first place? This one doesn\'t have any juice inside and is much
cheaper than the MLPs:
https://pl.mouser.com/datasheet/2/427/mkp1848dcl-1762560.pdf
Which would you think is better for keeping the juice in ?
In the long run, none. If there is no metal to glass seal, the juice
will find its way out.
Best regards, Piotr
Thanks - very good info. The poly numbers are amazing. Why use tantalums,
especially when JL says to derate them by a factor of three.
--
The best designs occur in the theta state. - sw
R
Rick C
Guest
On Monday, December 14, 2020 at 8:32:37 AM UTC-5, Steve Wilson wrote:
So Larkin is the authority in capacitor use? These devices are through hole and relatively huge! I think if you don\'t have special requirements on ESR or temperature stability, etc, most capacitor selection comes down to $/uF or ccm/uF.
There has to be a rather special requirement to justify the use of a through hole part.
--
Rick C.
- Get 1,000 miles of free Supercharging
- Tesla referral code - https://ts.la/richard11209
Piotr Wyderski <pete...@neverland.mil> wrote:
Phil Allison wrote:
** You have noticed the Callins is in an epoxy sealed container?
Regular electros are in a rubber bung sealed can.
The rubber seals can be pretty robust, if you can spend more. One
example:
https://pl.mouser.com/datasheet/2/88/MLP-17492.pdf
But if it must be robust, why would you use an electrolytic capacitor
in the first place? This one doesn\'t have any juice inside and is much
cheaper than the MLPs:
https://pl.mouser.com/datasheet/2/427/mkp1848dcl-1762560.pdf
Which would you think is better for keeping the juice in ?
In the long run, none. If there is no metal to glass seal, the juice
will find its way out.
Best regards, Piotr
Thanks - very good info. The poly numbers are amazing. Why use tantalums,
especially when JL says to derate them by a factor of three.
So Larkin is the authority in capacitor use? These devices are through hole and relatively huge! I think if you don\'t have special requirements on ESR or temperature stability, etc, most capacitor selection comes down to $/uF or ccm/uF.
There has to be a rather special requirement to justify the use of a through hole part.
--
Rick C.
- Get 1,000 miles of free Supercharging
- Tesla referral code - https://ts.la/richard11209