Digest for sci.electronics.repair@googlegroups.com - 10 updates in 4 topics

oldschool@tubes.com: Sep 08 03:05AM -0400

15 NOS Rubycon 100uf, 160v Electron Transfer Black Gate NH Capacitors,
are up to $2141.00 bid (plus shipping), on ebay, with 3+ days left to
go.
 
I know these are supposed to be the best caps, but are these caps made
out of gold? Why would anyone pay that much for them? (and the bidding
is not over yet).
 
http://tinyurl.com/y955cgq6
 
 
If thats out of your price range, you can always buy one VINTAGE NOS
(untested) Sprague .022 uf 200v 20% Bumble Bee Capacitor for $39
(shipping included), as a Buy it Now.
 
http://tinyurl.com/y9pxm6xh
John-Del <ohger1s@gmail.com>: Sep 08 04:33AM -0700

> (untested) Sprague .022 uf 200v 20% Bumble Bee Capacitor for $39
> (shipping included), as a Buy it Now.
 
> http://tinyurl.com/y9pxm6xh
 
 
 
Why? Folks pay all sorts of crazy money for things they want. These are 100uf at 160V, and they're bipolar. Maybe for some magical crossover network perhaps.
 
 
As for the second link, it's a "buy it now". Asking isn't the same as getting.
Ralph Mowery <rmowery28146@earthlink.net>: Sep 08 09:57AM -0400

In article <4954rcdp89g8i00j7cepaamb5chq98t6tg@4ax.com>,
oldschool@tubes.com says...
> (untested) Sprague .022 uf 200v 20% Bumble Bee Capacitor for $39
> (shipping included), as a Buy it Now.
 
> http://tinyurl.com/y9pxm6xh
 
Some of the people into high end audio systems are nuts.
 
They will pay over $ 100 for the 6 foot or so of wire that goes from the
equipment to the 120 volt wall socket. It is suspose to be some special
type of oxygen free copper. They do not take into account that there is
probably 25 to 100 feet of regular wire going to the breaker box and all
the other junk wire from there to the power company.
 
Even some old stock solder made at a certain place is going for big
bucks.
 
 
While I am not a wine drinker, I bet the audio people and the wine
people are about the same. Audio people can not tell the difference in
the equipment. Probably over 90% could not tell one wine from the other
if in a glass and not a bottle. Some goes for a few bucks and others
are auctiioned off for thousnds a bottle.
"jfeng@my-deja.com" <jfeng@my-deja.com>: Sep 08 08:19AM -0700

On Friday, September 8, 2017 at 6:57:37 AM UTC-7, Ralph Mowery wrote:
> Even some old stock solder made at a certain place is going for big
> bucks.
Monoisotopic lead will promote more uniform conduction. Achieving this is similar to the process used to enrich uranium. Or, you could start with an intrinsically monoisotopic element like gold.
N_Cook <diverse@tcp.co.uk>: Sep 08 05:37PM +0100

> (untested) Sprague .022 uf 200v 20% Bumble Bee Capacitor for $39
> (shipping included), as a Buy it Now.
 
> http://tinyurl.com/y9pxm6xh
 
There always has been "bids from the chandelier" no different now its
internet "auctions"
"Danny D." <dannydiamico@gmail.com>: Sep 08 12:11AM

Anyone know if saturation by carbon dioxide has a time constant?
http://i.imgur.com/MSm72Tp.jpg
 
Swirling seems to work with these 2L bottles, where I mix 4 degrees C (or
about) water under 30 psi CO2 pressure (or about) for about 10 minutes per
bottle (give or take) because I assume "diffusion" is slow; but is
diffusion slow, or is it (nearly) instantaneous?
http://i.imgur.com/gUJnLk3.jpg
 
Anyone have experience with how long it should take for carbon dioxide to
diffuse into the surface layer of water, and then to diffuse deeper if I
don't swirl?
 
If I just plug it in for a few minutes, the water isn't bubbly enough.
 
If I leave it for an hour, two things that are bad happen:
1. I lose CO2 because my connections are imperfect, but worse,
2. The water warms up (meaning it will hold less C02).
 
If you don't know whether the diffusion "should" be instantaneous or if
there is some kind of pragmatic coefficient, that's OK. It works.
 
I just don't know what I'm doing and why.
Do you?
"pfjw@aol.com" <pfjw@aol.com>: Sep 07 05:59PM -0700

The Troll is back. Please do not feed the troll.
ggherold@gmail.com: Sep 08 05:58AM -0700

On Thursday, September 7, 2017 at 8:11:13 PM UTC-4, Danny D. wrote:
> there is some kind of pragmatic coefficient, that's OK. It works.
 
> I just don't know what I'm doing and why.
> Do you?
 
Diffusion is slow*. You can calculate it. There is probably some
thermally driven currents in water that will mix things faster.
To get an idea of speed put a drop of food coloring into water.
 
George H.
(*I'm not sure about water, but I mixed up my own tanks
of gas for a CO2 laser and it took weeks to diffuse...
surprised the hell out of me.)
Trevor Wilson <trevor@SPAMBLOCKrageaudio.com.au>: Sep 08 11:04AM +1000

On 7/09/2017 9:43 PM, Arfa Daily wrote:
 
>> Then I think on some of the stuff I've worked on recently and I begin
>> to realise why.
 
> Hi Trevor. Trust you are well ?
 
**Apart from the usual aches and pains, all good thanks. I trust you are
likewise (sans the aches and pains of course).
 
> don't think I would hold my breath that anyone there would be prepared
> to spend the time digging through archives to try to find what I need.
> still, you never know ...
 
**Well worth trying Hitachi. A few years back I acquired a couple of
100MHz analogue 'scopes. A Hameg and an Iwatsu. Both were decent enough
'scopes and the Hameg manual was available easily enough, but the Iwatsu
presented a problem. I contacted the manufacturer and a full service
manual appeared in my inbox within days. No charge. I was surprised and
delighted.
 
FWIW: My second CRO was an Hitachi. It was almost an exact copy of a
Tektronix, ca. 1963-ish. All valves. Lots of them. Even had a bunch of
valves in the delay line. Damned thing consumed 500 Watts. Not a smart
purchase for Australia and for a young guy whose workshop measured
around 8 Square Metres.
 
I understand though.
 
 
--
Trevor Wilson
www.rageaudio.com.au
Clifford Heath <no.spam@please.net>: Sep 08 08:24AM +1000

On 07/09/17 21:26, ~misfit~ wrote:
 
> "Voluntary conversion" is doomed to failure due to inertia so it's a failure
> of the legislators not the public. It should have been made compulsory as it
> was in most other countries which changed over.
 
The legislators were true to the American ideal of liberty.
This was a failure that ideal, not of the legislature.
All ideals fail at the edges; that's why we call them ideals.
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