He recommended the “simplest solution” as the best which is using a variac and selenium rectifier as a power supply.
I know very little about this but I assume 110v, 230v or 240v is the mains supply depending on where you live. I thought ac to DC was ac voltage peak divided by square root of 2 hence 1.4 so DC voltage is less than ac and not more as you said.I am (not favorably) impressed by what I see.
I love FC speakers, in fact I have manufactured one myself in the 80´s, they can give you the highest field available for any structure, since you can fine tune it to *just* saturation point for that particular structure, no more, no less.
And these speakers must probably sound *good*
What I can´t understand is the absolute lack of information about a*crucial* element, such as the power supply.
*REALLY?* "110VAC or 230VAC or 240VAC?"
Which one will it actually be?
IF 240V is fine, that means rectified 353VDC, so a 1k DCR coil will dissipate CRAZY 125W
IF 110V is fine, DC will be 155V , dissipation will be 24W.
Still high for such a speaker, classic Jensen 15LL uses some 18W for a WAY larger speaker, the little 8" will quickly get very hot.
Does manufacturer offer any kind of setup suggestion?
What´s drawn on that sheet does not count as such.
Not forgetting that 2:1 "acceptable" variation means 2:1 field intensity.
If maximum is near saturation, half of it will sound weak mushy by comparison, certainly some detailed explanation must accompany the speakers.
And using LIVE offline power from an outside supply to inside of 2 cabinets, plus needed exposed wiring and even worse, connectors, is reckless.
I know very little about this but I assume 110v, 230v or 240v is the mains supply depending on where you live.I am (not favorably) impressed by what I see.
I love FC speakers, in fact I have manufactured one myself in the 80´s, they can give you the highest field available for any structure, since you can fine tune it to *just* saturation point for that particular structure, no more, no less.
And these speakers must probably sound *good*
What I can´t understand is the absolute lack of information about a*crucial* element, such as the power supply.
*REALLY?* "110VAC or 230VAC or 240VAC?"
Which one will it actually be?
IF 240V is fine, that means rectified 353VDC, so a 1k DCR coil will dissipate CRAZY 125W
IF 110V is fine, DC will be 155V , dissipation will be 24W.
Still high for such a speaker, classic Jensen 15LL uses some 18W for a WAY larger speaker, the little 8" will quickly get very hot.
Does manufacturer offer any kind of setup suggestion?
What´s drawn on that sheet does not count as such.
Not forgetting that 2:1 "acceptable" variation means 2:1 field intensity.
If maximum is near saturation, half of it will sound weak mushy by comparison, certainly some detailed explanation must accompany the speakers.
And using LIVE offline power from an outside supply to inside of 2 cabinets, plus needed exposed wiring and even worse, connectors, is reckless.
If you really wanted to go off the wall then depending on the required drive power you might take a 60W laptop brick and drive a push-pull convertor in step up with a manual tweak of the duty cycle. OK regulate the output current.
Use the field coil as the output inductor with no filter capacitance. I assume it has a rather large inductance on its own so ripple current will be small... Might be a bit of fun with EMI but just a thought.