Sanyo Full Rangers?

[thefragger]

Took apart and tossed the old TV at the cottage, pulled these guys out've 'em. I flipped through the Wich driver is the "real" Fe103a?? thread and didn't see a match for my basket.

Curious about what these guys are. The dustcover in the middle is plastic from the looks of it.


Hmm...

The markings on both drivers read as follows;

SANYO
V1552A
S12K50
4ohm 5W
JAPAN
k0Id

Knock knock, planet10?

[chrisb]

who's there?

between the 2 annular rings on near the cone perimeter, thick pressed paper mounting gasket (they were presumably rear mounted?) and the wider profile plastic dust cap, these would appear to be significantly different from what we've casually referred to as "Fe103a"

that said, there's no reason they couldn't sound fine within limited application

[planet10]

These are an interesting driver. Not in the FE103A family, largely due to the fact that they are not alnico. They have a ceramic magnet on what is normally an alnico motor. A good illustration of how potent alnico is, the much larger piece of ceramic probably still lags the alnico that would have been in the same driver on some earlier run.

dave

[thefragger]

I guess I should learn about how to measure drivers, and then measure these ones, before I can build a box, eh?

[planet10]

yes.

dave

[chris661]

An AC ammeter can tell you the resonant frequency.

Connect it in series with the driver, when the current flow is lowest (ie, resistance is highest), that's where the resonance is. There's a signal generator on winISD that can help...

Chris

[kach22i]

The urge to build is strong in this one............do you feel the force?

They look a lot better than the old car speakers I'm fooling around with.

[thefragger]

Originally Posted by chris661

An AC ammeter can tell you the resonant frequency.

Connect it in series with the driver, when the current flow is lowest (ie, resistance is highest), that's where the resonance is. There's a signal generator on winISD that can help...

Chris

Cheers for the advice! There's a lot of things I know I don't know, but I didn't know that I didn't know that! (admitting that there are unknown unknowns is the first step )

I've got a bench-top sig gen--that should do the trick, eh?

So once I've found the resonant frequency I build a box tuned for that freq and I should be good you figure?

Originally Posted by kach22i

The urge to build is strong in this one............do you feel the force?

They look a lot better than the old car speakers I'm fooling around with.