COB holders - the basics

stardustsailor

stardustsailor

Well-Known Member
(...) The commercially important micas are muscovite and phlogopite, which are used in a variety of applications. Mica’s value is based on several of its unique physical properties. The crystalline structure of mica forms layers that can be split or delaminated into thin sheets usually causing foliation in rocks. These sheets are chemically inert, dielectric, elastic, flexible, hydrophilic, insulating, lightweight, platy, reflective, refractive, resilient, and range in opacity from transparent to opaque. Mica is stable when exposed to electricity, light, moisture, and extreme temperatures. It has superior electrical properties as an insulator and as a dielectric, and can support an electrostatic field while dissipating minimal energy in the form of heat; it can be split very thin (0.025 to 0.125 millimeters or thinner) while maintaining its electrical properties, has a high dielectric breakdown, is thermally stable to 500 °C (932 °F), and is resistant to corona discharge. Muscovite, the principal mica used by the electrical industry, is used in capacitors that are ideal for high frequency and radio frequency. Phlogopite mica remains stable at higher temperatures (to 900 °C (1,650 °F)) and is used in applications in which a combination of high-heat stability and electrical properties is required. Muscovite and phlogopite are used in sheet and ground forms.[10] (...)

(..)
Electrical and electronic
Sheet mica is used principally in the electronic and electrical industries. Its usefulness in these applications is derived from its unique electrical and thermal properties and its mechanical properties, which allow it to be cut, punched, stamped, and machined to close tolerances. Specifically, mica is unusual in that it is a good electrical insulator at the same time as being a good thermal conductor. The leading use of block mica is as an electrical insulator in electronic equipment. High-quality block mica is processed to line the gauge glasses of high-pressure steam boilers because of its flexibility, transparency, and resistance to heat and chemical attack. Only high-quality muscovite film mica, which is variously called India ruby mica or ruby muscovite mica, is used as a dielectric in capacitors. The highest quality mica film is used to manufacture capacitors for calibration standards. The next lower grade is used in transmitting capacitors. Receiving capacitors use a slightly lower grade of high-quality muscovite.[10]
https://en.wikipedia.org/wiki/Mica


Mica sheets are used to provide structure for heating wire (such as in Kanthal or Nichrome) in heating elements and can withstand up to 900 °C (1,650 °F).(..)

Bakelite is phenolic resin mixed with powdered wood .

(genuine )Micarta is layered paper or canvas cloth (or linen ) sheets + phenolic resin,
used in old days as electronics circuit board (not printed ,though) ,wrongly named as bakelite boards ...

https://en.wikipedia.org/wiki/Micarta
https://en.wikipedia.org/wiki/Phenol_formaldehyde_resin
https://en.wikipedia.org/wiki/Bakelite
 
Last edited:
alesh

alesh

Well-Known Member
PurpleBuz said:
looking forward to test results. any idea on cost?
Click to expand...
I've been quoted with this:
Sample orders:
Samples ≤5 pcs free of charge
Mini order ≤ 20 pcs 90 €
Small order ≤ 50pcs 160 €

standard orders
order lot market price
100 parts per order 2,42 € per unit
200 parts per order 2,28 € per unit
500 parts per order 2,04 € per unit
1000 parts per order 1,68 € per unit
3000 parts per order 1,59 € per unit
5000 parts per order 1,48 € per unit
Higher volumes on request

All prices are FCA Kierspe
 
Airwalker16

Airwalker16

Well-Known Member
littlejacob said:
Bonjour
All holder are solderless!
CU
Click to expand...
Not true at all. There's 2 I know I've seen that require soldering. One of which growmau5 displays on his DIY series. The other I can't remember where I saw. But thirdly, Kapton tape method DOES require soldering. The point of Kapton is to NOT have to use a holder. Look at Supra's builds.
 
Airwalker16

Airwalker16

Well-Known Member
Question, my ideal chip loks for 3590''s have 2 identical holes on the white wire connection push in slots. Which one do I even use?
 
Airwalker16

Airwalker16

Well-Known Member
Just use the left side for series wiring, I get that. Just the right hole that's identical I'm wondering about. Is it just to use 2 wires if you want?
Pic has a line pointing to the hole in question.

Screenshot_2016-02-02-18-42-22.png
 
R

rollyouron

Well-Known Member
How did some of you gentlemen install the reflector holder from Jerry to the ideal holder? I've installed 12 and just wondering if I'm installing correctly. I want to try using the the 2 holes for the holder instead of drilling and tapping 2 more holes, but haven't tried.
 
littlejacob

littlejacob

Well-Known Member
Airwalker16 said:
Just use the left side for series wiring, I get that. Just the right hole that's identical I'm wondering about. Is it just to use 2 wires if you want?
Pic has a line pointing to the hole in question.

View attachment 3599767
Click to expand...
You put a little screwdriver in the other hole and you are able to put off the wire from it...that's what it is made for
Because when you plug the wire it stay inside even if you try to put it off!
Plug anything in the other hole and it will realize the wire
Don't screw it too hard and put the cob on it before apply TIM!
CU
 
littlejacob

littlejacob

Well-Known Member
Sorry...the one pointing on the pic is the one I plugged my wire into...the other one is to release the wire!
I had to remove it and it is the way I use...maybe it is for other purpose but what purpose idk...to put a second driver on the same cob...maybe I know it is possible...we should ask @SupraSPL himself...lol...and I hope he's ok! (Same for your ride...!).
Thanks
CU
 
Airwalker16

Airwalker16

Well-Known Member
littlejacob said:
You put a little screwdriver in the other hole and you are able to put off the wire from it...that's what it is made for
Because when you plug the wire it stay inside even if you try to put it off!
Plug anything in the other hole and it will realize the wire
Don't screw it too hard and put the cob on it before apply TIM!
CU
Click to expand...
No. To release the wire you use something very very thin. Like a sewing needle and push it in ABOVE where your wire is pushed Into. Yes, the SAME HOLE your wire is in is where you i sert the pin to release it. The second hole from asking Rahz is just another hole to use if needed/wanted. That much I'm CERTAIN of cause it's shown on the video posted earlier.
 
You must log in or register to reply here.
Top