Wirewound Resistors Dummy Load question

[g1]

No problem. Yes I was just saying that the dual banana jacks (5 way binding posts) are very handy for clips, bare wires, etc. You can adapt anything with test clip leads, eliminates the need for a lot of adapters.

[Sowhat]

Will these fit the bill for the 5 way plugs: The data sheet doesn't give any specs on receiving "banana" plugs or anything. Am I looking at the wrong type of binding posts? I love Mouser but sifting for parts can be a pain sometimes.

7016 Keystone Electronics | Mouser

Yeah, that's them!

I don't have any because I have exposed buss wire and you can clip anything you like on those and they have the extra bonus of waking you up if you are a bit groggy and touch them by mistake... life has to have some surprises. :-)

[g1]

Will these fit the bill for the 5 way plugs: The data sheet doesn't give any specs on receiving "banana" plugs or anything. Am I looking at the wrong type of binding posts? I love Mouser but sifting for parts can be a pain sometimes.

7016 Keystone Electronics | Mouser

Those will work, I prefer the dual's, like this:
2269-0 Pomona Electronics | Mouser

[Enzo]

I use the dual ones too, My test cords have dual plugs on them. it is then a snap to just flip it over for phase reversal. Or stack as many things as I might want on one pair. My pairs are also spaced the same 3/4" apart next to each other, so if I want, I can plug one dual into two pairs for seriesing or whatever.

[Pryde]

One more thing considering resistor types: Do the large ceramic coated ones require mounting to a heatsink or can they just be mounted on a piece of wood, etc? I only ask because I can save extra shipping costs if I don't need to buy a slab of 6061 aluminum. Here are the resistors I am referring to:

New 120W Audio Power Tube Amplifier Dummy Test Load 16 Ohm Wirewound Resistor | eBay

[g1]

Those are free air cooling, no heatsink. I would point a fan at them though.

[Pryde]

Those are free air cooling, no heatsink. I would point a fan at them though.

Thanks! I will likely go this route then as it will be cheaper than buying 4 Arcol resistors and an aluminum heat-sink and hardware.

[kg]

when i built the baga i needed a way to test at full power, so i bought 4 of these.

[soundguruman]

I would recommend 300 watt, edge wound resistors.
Edge wound has no or little inductive reactance...
Using that, you are ready to test SVT or similar monster amp.
They have mounting brackets, that make it easy.
I use stove wire to hook them up. I use stainless steel stove ring terminals...
This type of fireproof wire can be purchased at a hardware store.





This is a Hammond Cabinet, not very expensive, whole thing costs less than $100..

Next, I'm going to install Amp Meters or Watt Meters on the cabinet...This will be a cool feature.

[Pryde]

I ended up buying 4 ceramic coated 16 ohm resistors (120 watt). So I will get 8 ohms at 240 watts or 4 ohms at 480 watts. That really should be enough for my small operation. Might have to turn down real high power amp repairs occasionally but so be it.

I plan on mounting them to a wood plank with some nylon stand-offs and just point a fan at them if need be.

New 120W Audio Power Tube Amplifier Dummy Test Load 16 Ohm Wirewound Resistor | eBay

[nashvillebill]

My very first dummy load used a wirewound resistor mounted to a wood board with some standoffs. Even with a fan, the board started to get charred and slightly burnt, to the point of smoking. Don't underestimated the amount of heat being radiated from the resistors!

[kg]

I would recommend 300 watt, edge wound resistors.
Edge wound has no or little inductive reactance...

i've never seen a non inductive speaker coil...

[Pryde]

My very first dummy load used a wirewound resistor mounted to a wood board with some standoffs. Even with a fan, the board started to get charred and slightly burnt, to the point of smoking. Don't underestimated the amount of heat being radiated from the resistors!

Hmm. I was informed it would be ok? Well should I then find a piece of metal or heatsink material to mount them to instead? Not sure if the mounting brackets on the resistors will dissipate the heat?

[nashvillebill]

Might be okay with a 10 watt amp, but for anything more, I'd space it well off of a piece of metal. I would not depend on the mounting brackets to dissipate heat.

[soundguruman]

edgewound is intended to reduce inductive reactance.