I prefer the letter that Sir Archibald Clark Kerr wrote to Lord Reginald Pembroke.
Funny but not the same.
When Stalin gets the letter he wants to show it to everyone. So he steps into the hall, but it is empty, the street.. the same. Finally he wanders down to the square where a single fellow is scrubbing the streets. He shows him the letter to prove he has won the day. Then he asks "Where is everybody."
The street sweeper says " Comrade I am afraid that even with the progress we have made with socialism they are still at home secretly celebrating Christmas."
"And why are you here?"
"Well you see I used to be Jewish."
"And what do you think of the letter."
"Well comrade you must understand Trotsky also used to be Jewish."
"And how does that affect the letter?"
"Well you have to read it right." It really says "I was wrong!!!, you were right?"
(A joke better verbalized.)
Actually I have, much more polycarbonate than nylon. Before you cold form plastics you need to get the moisture content low enough so that you don't get bubbles.
Time and temperatures are the secret polycarbonate can dry in as little as 24 hours nylon takes 72. Never tried a vacuum.
As a quick beside and a thank you. I do some PVC molding using partial heating with halogen lamps. Bubbles are a recurring problem, even at what I measure to be way below the decomposition temperature of PVC. This must be it.
As a general question, I hope Stuart can shine his light on it: what are the water absortion qualities of PVC, and if it could be problematic heat forming in his way, how to dry it? I always assumed there would be a sort of O-Cl-F continuum with respect to water absortion, but perhaps I was wrong and this may solve a long harboured question.
vac
I prefer the letter that Sir Archibald Clark Kerr wrote to Lord Reginald Pembroke.
????😉
Vac, PVC definitely needs drying. It's not as hygroscopic as nylon, but before compounding, you have to get it dry (and keep it dry) or you get bubbles and hydrolytic decomposition.
The C-F bond is far less labile than C-Cl or C-Br.
The C-F bond is far less labile than C-Cl or C-Br.
British whimsy at it's best! Nothing to do with a vibrating glass tube and sand...except in some geographical locations; at least that is what I am told.😱
You will find WHY I use exotic circuit board materials in Application Note AN-348, from Analog Devices. It specifically mentions circuit 'hook' and references the original article from Tektronix.
You will also find it in Vol. 17, No. 2, 1983 of the 'Analog Dialogue'.
here
.
Just double-checking, there will be a part two of "Low-noise Microphone Preamplifiers" in an upcoming Linear Audio ?
.
.
Just double-checking, there will be a part two of "Low-noise Microphone Preamplifiers" in an upcoming Linear Audio ?
.
Sneak preview (only part of the contents of linear Audio Vol 3):
Circuit Design
A Headphone Buffer/Amp and Auto-EQ for Headphones - Richard Marsh
DIY Low-noise Microphone Preamplifiers, Part II – Scott Wurcer
Correcting transducer response with an inverse resonance filter – Steven van Raalte
Passive, Discrete, DC Coupled, Open Loop IV Converters - Sigurd Ruschkowski
jan
Sneak preview (only part of the contents of linear Audio Vol 3):
Circuit Design
A Headphone Buffer/Amp and Auto-EQ for Headphones - Richard Marsh
DIY Low-noise Microphone Preamplifiers, Part II – Scott Wurcer
Correcting transducer response with an inverse resonance filter – Steven van Raalte
Passive, Discrete, DC Coupled, Open Loop IV Converters - Sigurd Ruschkowski
jan
Would be REALLy great if I could buy your mags on line and pay with Visa!
PayPal does not work in my case.
:-(
Would be REALLy great if I could buy your mags on line and pay with Visa!
PayPal does not work in my case.
:-(
I'm working on that.
BTW, it's not a 'mag', I beg you pardon??
It's a 'bookzine' 😉
jan
Well, it's good to see Richard Marsh writing something again.
And Richard Burwen, explaining how tweaks that cannot work can still lead to audible differences.
jan
Would be REALLy great if I could buy your mags on line and pay with Visa!
PayPal does not work in my case.
Same here. Amazon has the first two (0 and 1) but nothing later. Help!
Thanks,
Chris
Same here. Amazon has the first two (0 and 1) but nothing later. Help!
Thanks,
Chris
You are aware that paypal can be coupled to your credit card?
jan
You are aware that paypal can be coupled to your credit card?
Yes, I'm just very conservative about such stuff. I'll get over it someday, cause I'm desperate to read Vol. 2.
Thanks,
Chris
BTW, it's not a 'mag', I beg you pardon??
It's a 'bookzine' 😉
jan
'Webazine' has a nice ring to it don't you agree?🙂
And Richard Burwen, explaining how tweaks that cannot work can still lead to audible differences.
Just remember, you spilled the beans, not me. 😀
I would give several vital organs to spend some time listening to Burwen's setup. The photos on his website are astonishing.
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