ComodoComplex

Chassis Clamp for Power Resistor?
« on: March 24, 2020, 08:04:11 PM »
Hey all,

See attached image. I'm pretty sure this doesn't exist as a mass-produced product, but if it does I'd love to know about it! If it in fact doesn't, I'd love to hear your thoughts about how to make one in a more elegant fashion than I did...

Background:
I'm using a 10W 470-ohm resistor in place of a 5Y3 in a Filmosound 385-style circuit, and I decided to go with these new-fangled radial resistors to save on board space and also give it that tube-like functionality as a swappable component (could use different values to get varying amounts of sag). I'm using PCB socket pins to grab the resistor leads, but I found that a clamp on the chassis is needed for additional stability and to make sure this component doesn't get torqued out/broken. It is very similar to can-cap mounts -- except that no one seems to make them.

Thanks!
-Ben


squarewave

Re: Chassis Clamp for Power Resistor?
« Reply #1 on: March 24, 2020, 09:05:34 PM »
Or you could get one of these type [1]:

 

mounted on the inside with bolts through to a heat sink on the outside. Note that the power rating of these depend on being mounted to a heat sing with suitable dissipation. Something chunky with fins will work best.

[1] Vishay RH010500R0FE02

ComodoComplex

Re: Chassis Clamp for Power Resistor?
« Reply #2 on: March 24, 2020, 09:08:00 PM »
Yeah those are the only mass-produced chassis-mount resistors - but I like the modular aspect of the clamp + PCB sockets...

Thanks!

JohnRoberts

Re: Chassis Clamp for Power Resistor?
« Reply #3 on: March 24, 2020, 09:46:43 PM »
Maybe a simple worm screw clamp attaching the resistor to a screw sticking up from the chassis.

JR
Don't only half-ass tune your drums. Visit https://circularscience.com to hear what properly "cleared" drums sound like.

rackmonkey

Re: Chassis Clamp for Power Resistor?
« Reply #4 on: March 25, 2020, 12:40:09 PM »
it'd be easy to square up the sides of a standard capacitor clamp. It'd be nearly identical to what you have in your picture.

https://www.tubesandmore.com/products/capacitor-clamp-1-diameter
Whether you think you can or you think you can't, you're probably right.


 

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