Magura said:
They have 0.016" sheets of grade 5, which google tells me is 0.4064 millimeters
--
Brian
BrianGT said:
My calculator (and lately my brain as well) agrees with you...dunno why, but everytime I get in touch with imperial units things tend to go south 🙁
6*6*0.016 is not a bad option. I honestly would prefer wire though (just to be a pain now that I can get sheet) 😉
Peter: The material is needed for the arm thats to connect the slider with the axle and work as a spring (rotary switch...im sure youve taken such apart at some point).
Magura🙂
Why titanium for the arm???
As one of those who can build a rotary switch ahem ahem🙂
Why do you need titanium for your contact spring?? Would'nt half hard brass with an isolated silver contact be up to the stress??
Mark
As one of those who can build a rotary switch ahem ahem🙂
Why do you need titanium for your contact spring?? Would'nt half hard brass with an isolated silver contact be up to the stress??
Mark
Brass, steel and the like goes tired over time. Another reason for using titanium is that the elaticity is much higher, so its somewhat easier to make a liniar action spring.
The mating contact materials should also be different, so for the contact I intend to use CuBe2.5 as its readily awailable and seems to suit the purpose. You must never make 2 pieces of the same material and hardness slide against eachother, it will make heavy wear and loads of abrasion and the like as a consequence of that.
Magura🙂
The mating contact materials should also be different, so for the contact I intend to use CuBe2.5 as its readily awailable and seems to suit the purpose. You must never make 2 pieces of the same material and hardness slide against eachother, it will make heavy wear and loads of abrasion and the like as a consequence of that.
Magura🙂
Hi,
Bi-metal contacts aren't exactly ideal either when there some voltage on them, remember?
Cheers,😉
Bi-metal contacts aren't exactly ideal either when there some voltage on them, remember?
Cheers,😉
fdegrove said:
True, but of two evils, I prefer the galvanic issue over a guaranteed slow death. The only solution to this would be to use a piece of solid platinium....which is unfortuantely rather expensive 🙁 unless you have something up your sleeve I have overlooked??
Magura🙂
Reading Cello broshure it says that "the contacts are made of platinum/palladium, cut from strips of custom made alloy, formed in their own tooling".
Peter Daniel said:
Where can I find Cello on the web? A search gave me a whole lot of links to music instruments 🙁
Cheers
Magura🙂
Thanks Peter.
This is pretty much what I intend to make, just with 40 positions, no indexing and the whole thing will be sealed.
When the whole thing is sealed, I dont see much reason for spending another 200USD for platinum for the contacts ??
Magura🙂
This is pretty much what I intend to make, just with 40 positions, no indexing and the whole thing will be sealed.
When the whole thing is sealed, I dont see much reason for spending another 200USD for platinum for the contacts ??
Magura🙂
Hi,
Errrr...How much is it you think this whole thing is going to cost on materials and manhours again?
Price for a mono unit is O.K, $ or Euros too...
You can even use my one of my tooth fillings if it reduces cost...
Cheers,😉
Errrr...How much is it you think this whole thing is going to cost on materials and manhours again?
Price for a mono unit is O.K, $ or Euros too...
You can even use my one of my tooth fillings if it reduces cost...
Cheers,😉
fdegrove said:Hi,
Errrr...How much is it you think this whole thing is going to cost on materials and manhours again?
Price for a mono unit is O.K, $ or Euros too...
You can even use my one of my tooth fillings if it reduces cost...
Cheers,😉
The total price of a stereo switch would end up between 1000 and 1500 USD if Id just go out and have it all made and paid by the hour. So you see, its not likely to be a mega seller 😀
The material cost is a fraction of that...I know, but considering this switch would have material cost like 200USD for a stereo, adding another 200USD for something thats not going to make any difference....seems like a lot of money then 🙁
Did I understand your question right?
Magura🙂
Hi,
I'd like to think so...but:
What's not going to make any difference? The platinum?
Dunno about you but I'd rather use coinsilver than platinum at that price.
$200,00 in production costs is a truckload % wise IMHO.
Lotsa peanuts indeed.
Cheers, 😉
\using Hg wetted reed relays ages ago already...
I'd like to think so...but:
What's not going to make any difference? The platinum?
Dunno about you but I'd rather use coinsilver than platinum at that price.
$200,00 in production costs is a truckload % wise IMHO.
Lotsa peanuts indeed.
Cheers, 😉
\using Hg wetted reed relays ages ago already...
fdegrove said:
What's not going to make any difference? The platinum?
Dunno about you but I'd rather use coinsilver than platinum at that price.
$200,00 in production costs is a truckload % wise IMHO.
Lotsa peanuts indeed.
Cheers, 😉
\using Hg wetted reed relays ages ago already...
Oups..I realize Im talking in riddles...yes I meant the platinum.
200USD is a whole lot of bottle collecting in the local park 😉
Magura🙂
fdegrove said:
If the surface of the contacts is big enough it should work fine. It must though be mated with CuBe2.5 to avoid wear.
EDIT: Well not pure silver but what they call fine silver, its got some copper content, about 7.5%.
Magura🙂
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