diyAudio - Fried X-over

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I gona make fried X-over fro one friend;
he already make cabs etc...

what puzzles me is obvious mistake in schematic-10UF in series with mid driver (B110)....
opinions
xperiences?

TIA

That is an awefully small value for a driver that goes down to 100 Hz or so. I could have made a mistake on the XO... i do know there were quite a few revisions of this XO, you might want to see if you can scare more info up on the IMF list (on yahoo thou so a pain to access)

dave

Quote:

Originally posted by planet10
........ you might want to see if you can scare more info up on the IMF list (on yahoo thou so a pain to access)

dave

can you give me some url or at least more precize name of that yahoo group?
TIA

Here is a list mail header... you can also just surf over to yahoo groups,

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Its a tad unusual to see a parallel x-o in a "Fried" speaker, he generally used series x-os

Quote:

Originally posted by Andy Graddon
Its a tad unusual to see a parallel x-o in a "Fried" speaker, he generally used series x-os

http://www.t-linespeakers.org/classi...H/fried_H.html

Quote:

Originally posted by Andy Graddon
Its a tad unusual to see a parallel x-o in a "Fried" speaker, he generally used series x-os

Later he did... the Fried R actually used a version of the KEF DN12 XO.

The XO shown was drawn based on an actual Fried H i had. Its vintage was 1978 or so.

dave

Corrections to the schematic

I bought a Fried Model H from Dave 3 or 4 years ago. I have two of these crossovers, both factory wired, and both almost identical (see below). There are some corrections to the schematic:
1. The 10 mfd cap in question is not in series with the mid, but is actually in parallel with the 10mfd/11 ohm resistor combo.
2. The 11 ohm resistors (all of them) are color banded as 10 ohm, although many measure about 11 ohms.
3. The large choke in the woofer is about 15mH, not 4.0, the DCR looks okay. This is a HUGE air core choke.
4. The tweeter polarity is reversed. I actually have two of these Model H crossovers, and one is wired as per Dave's schematic (positive tweeter polarity), and the other inverted. I've measured both ways and there is a big suckout at the 3K crossover frequency if the tweeter is wired as shown, indicating it is wired incorrectly.
I've actually just finished rebuilding one of the Model H crossovers (that had been trashed in shipping), and I'll post photos and details on my webpage shortly. Photos of the rebuilt cabinets are there now:
http://www.geocities.com/mpbarney/FriedmodelH.html

Re: Corrections to the schematic

Quote:

Originally posted by mikebarney
I bought a Fried Model H from Dave 3 or 4 years ago. I have two of these crossovers, both factory wired, and both almost identical (see below). There are some corrections to the schematic:
1. The 10 mfd cap in question is not in series with the mid, but is actually in parallel with the 10mfd/11 ohm resistor combo.
2. The 11 ohm resistors (all of them) are color banded as 10 ohm, although many measure about 11 ohms.
3. The large choke in the woofer is about 15mH, not 4.0, the DCR looks okay. This is a HUGE air core choke.
4. The tweeter polarity is reversed. I actually have two of these Model H crossovers, and one is wired as per Dave's schematic (positive tweeter polarity), and the other inverted. I've measured both ways and there is a big suckout at the 3K crossover frequency if the tweeter is wired as shown, indicating it is wired incorrectly.
I've actually just finished rebuilding one of the Model H crossovers (that had been trashed in shipping), and I'll post photos and details on my webpage shortly. Photos of the rebuilt cabinets are there now:
http://www.geocities.com/mpbarney/FriedmodelH.html

TNX!
that's exctly what I looked for!