Anyone has THD Power Plate schematic?

[Alan0354]

Anyone has the THD Power Plate schematic?

[jmaf]

I think the schematic goes like this: input -> transformer+resistors+lamps -> output

But seriously, why do you need one

[Chuck H]

If you just need an attenuator there are other viable schematics available. I did some attenuator research and I've never found a schem for the HotPlate. It's my understanding that the heat sink case has ceramic resistors fitted into it's actual construction. It's not even an active/inductive load, just EQ'd a little to sound more dynamic than other resistive load attenuators.

I believe it's the most popular attenuator because it's slick looking and well marketed. I know that paying for an attenuator you can only use with one impedance load, and then paying for another when you need that tool for a different load was my first turn off to that product. And, being designers and builders here, I don't trust it because I don't know what it's doing to my amps. The actual design has been kept from public view. I don't think it's intentional, if the components were all on a board someone would have disected one by now. But a bunch of ceramic resistors molded into a heat sink chassis is harder to get into and evaluate.

[Alan0354]

If you just need an attenuator there are other viable schematics available. I did some attenuator research and I've never found a schem for the HotPlate. It's my understanding that the heat sink case has ceramic resistors fitted into it's actual construction. It's not even an active/inductive load, just EQ'd a little to sound more dynamic than other resistive load attenuators.

I believe it's the most popular attenuator because it's slick looking and well marketed. I know that paying for an attenuator you can only use with one impedance load, and then paying for another when you need that tool for a different load was my first turn off to that product. And, being designers and builders here, I don't trust it because I don't know what it's doing to my amps. The actual design has been kept from public view. I don't think it's intentional, if the components were all on a board someone would have disected one by now. But a bunch of ceramic resistors molded into a heat sink chassis is harder to get into and evaluate.

I actually have one, it work really well as long as you don't go to the last range. It still sound pretty good even at the last range and turn the pot down. I can copy the schematic but it is not very easy( I am lazy!!) I just wonder anyone has one handy. Yes, there is no inductive load, just equalizing. But they sure did a good job. I don't see how it can hurt the amp.

I did search on other attenuators, most are just resistor divider sort of thing, this is the only one that has more equalize stuff and I am happy with it.