Dryer element, Chop off what you need!
Max.

 

Hello guys. Thanks for the opinions. I am looking for a 600k,2.4 watt resistor. I think metal oxide. I want to use them as bleed resistors for my Tesla coils capacitors. I emailed Vishay but they have no responded for a few days.

 

Hello guys. Thanks for the opinions. I am looking for a 600k,2.4 watt resistor. I think metal oxide. I want to use them as bleed resistors for my Tesla coils capacitors. I emailed Vishay but they have no responded for a few days.

How many millions of pieces do you require? What voltage rating?

 

Hello guys. Thanks for the opinions. I am looking for a 600k,2.4 watt resistor. I think metal oxide. I want to use them as bleed resistors for my Tesla coils capacitors. I emailed Vishay but they have no responded for a few days.

For a bleeder resistor, unless it is also part of a critical timing circuit, a 5% or 10% value should work. So I suggest using 5 watt 620 kOhm resistors, which is a standard value. And in a Tesla coil there are high voltages and so a physically large resistor may be an advantage. If the calculated power is 2.4 watts then I very seriously recommend the 5 watt units to provide an adequate safety margin.

 

Hello guys. Thanks for the opinions. I am looking for a 600k,2.4 watt resistor. I think metal oxide. I want to use them as bleed resistors for my Tesla coils capacitors. I emailed Vishay but they have no responded for a few days.

Here ya go: 620 kΩ, 3 watt, 5% at DigiKey. Sure, it's not precisely 600 kΩ, but I doubt your circuit will care since they're only bleed resistors.

 

A single little resistor will probably arc 1200V unless it has a high voltage rating.
Whatever switches the bleed resistor also will probably arc.

 

I am looking for a 600k,2.4 watt resistor. I think metal oxide. I want to use them as bleed resistors for my Tesla coils capacitors.

So why do you think you need a specially ordered resistor?
Your requirements are not critical at all and there are many standard resistors that will meet your needs.

 

I don't know whats with everyone trying to make electronics smaller...

View attachment 181106

Don't they know you should never lift it by the terminals!!! Where did they find these gorillas?

 

Hello guys. Thanks for the opinions. I am looking for a 600k,2.4 watt resistor. I think metal oxide. I want to use them as bleed resistors for my Tesla coils capacitors. I emailed Vishay but they have no responded for a few days.

So what is it about this resistor that makes you think you need a specially-ordered one? If it's being used as a bleed resistor, then it's value certainly isn't critical. Any resistor that is close in value, has at least that high a wattage rating, has a sufficient voltage rating, and will physically fit in the space should work fine. You might need to avoid wire-wound resistors due to the inductance, but I'm not that familiar with the application to be sure.

Do you see how telling is what you are using it for enables us to give you a lot better advice?

 

I worked on the CV-8 supply here http://www.vesco-usa.com/ves-prints.html and they used a 3 Meg 60 W resistor like the DVY-1 here http://www.evapspares.com/R.html

It had like a thick heat shrink covering and clips to mount it. It was huge. Bigger than a foot long. I'm sure the voltage rating wasn't even 15 kV (typical operating point), but it was mounted on may be 1/4" Bakelite and 3-4" away from any metal.

The voltage divider for control was done with a lot of high power chassis mount resistors. The schematics show it as a single resistor, but the parts list shows it as multiple ones.

Oddly enough, I did have to replace this beast.

 

Hello,

Vishay has a series of high voltage resistors.
More can be found here:
https://www.vishay.com/resistors-fixed/high-voltage/

Bertus

 

Don't they know you should never lift it by the terminals!!!

next time i photoshop i will be more careful

 

Ok maybe this is one of them "Stupid" questions but why would you build a tesla coil? Sure it looks cool! But so does a bomb and both can kill you.
Brzrkr

 

everything can kill you. that does not mean we stop swimming, eating, driving, traveling, playing sports...

 

I too, am afraid of Tesla coils... but I do get why some people like it... it's like mountain climbing, or skiing... you just want to prove to yourself that you can do it

 

everything can kill you. that does not mean we stop swimming, eating, driving, traveling, playing sports...

Even water - you drown See: https://www.dhmo.org/facts.html

 

A Tesla coil is an amazing thing, and making one that works without having to use a dozen active devices and several stages is an accomplishment that not everybody can pull off. And the very high voltages can be fun to experiment with as well. Sitting in front of the TV and getting fat is far more certain to kill and needing 8 strong folks to carry the casket is such a humiliation. Walking down the street can be fatal as well, and I sort of pity those who are chained to every possible fear, but I only pity them a small amount. Knowing how to handle the situation is the antidote for fear and it is what comes with constant learning. Being safe with a Tesla coil is simply a matter of knowing where to not put ones hands, similar to knowing how to be safe with other people.

 

Hello,

Vishay has a series of high voltage resistors.
More can be found here:
https://www.vishay.com/resistors-fixed/high-voltage/

Bertus

Hey thanks after hearing a few responses I have realized that the resistor doesn't have to be exactly spot on. After looking at that product list from vishay I have decided that the first Carbon Film Resistors, General Purpose, High Voltage at 3 walls 400k to 500 m seems like the best idea. I don't fully understand min resistance and max resistance of you buy a resistor it should be one resistance in my mind. What do you think of that selection thanks. I have a 15000 volt transformer and 13 ,.33 uf caps. I did the math too. Thanks

 

I don't fully understand min resistance and max resistance of you buy a resistor it should be one resistance in my mind

Resistances have tolerances. + - 20%, 10%, 5%, 1%, 0.01%, 0.001% and possibly finer.

Back in the 1950's 20% and 10% were very common. They are also affected by temperature by a small amount.

We have much better manufacturing control now and there are different types of resistors available. As the tolerance goes down the cost goes up.

resistors in Integrated circuits can be "laser trimmed".

 

Hey thanks after hearing a few responses I have realized that the resistor doesn't have to be exactly spot on. After looking at that product list from vishay I have decided that the first Carbon Film Resistors, General Purpose, High Voltage at 3 walls 400k to 500 m seems like the best idea. I don't fully understand min resistance and max resistance of you buy a resistor it should be one resistance in my mind. What do you think of that selection thanks. I have a 15000 volt transformer and 13 ,.33 uf caps. I did the math too. Thanks

Here's my humble opinion, John ... and please don't be offended, I'm only being honest here ... if you didn't know that a resistor's value is not critical in an application such as this, maybe you're not yet ready to dive into a project as advanced (and dangerous) as a Tesla Coil ... what's more, maybe you should start another thread asking about the dangers of this type of project, and how to bring them to a minimum... just my 2¢