5234A Crossover

[lpd]

I have an electronic crossover that has a couple card inside that I can't find any data on....

they are 5134F cards anyone know their specs?

[4313B]

I can't find anything in any of the schematics. Post all the values on one of the cards.

[lpd]

The number is 51340F. Values are .022/250 X 5 and 4.7K resistors.

[grumpy]

1.1KHz, 12db/oct ... it's in the 5234A manual, so double check me. -grumpy

[4313B]

Sounds like a 1.1 kHz card. I don't see that number on any schematics or cards I have. Maybe subwoof has. It might be just a serial stamp.

[4313B]

1.1KHz, 12db/oct ... it's in the 5234A manual, so double check me. -grumpy

I was looking at the actual schematics, and yes, you're correct.

[Zilch]

A seller on eBay recently listed a bunch of 12 dB cards.

The 51340x number is in the trace etching.

I have D, E, and F versions - blanks, feedthroughs, and 1200 Hz.

It seems to be the raw board part number, with revisions, though no changes are apparent on examination....

[subwoof]

The JBL cards had many subtle variations to reflect layout, coating and screening. The only place I have seen this documented is in an internal mechanical drawing that showed revisions in the corner that came with a card from the original tent sale.

Have no idea where that dwg is but I will submit it for the library when it's unearthed.

In my ( now dwindled ) box I have the C,D,E,F versions and they look the same to me...

They did the same with the 18db cards ( 56182 ).

When they produced the CD horn 18db variants, it went even further but I need dan brown to decipher that writing....

sub

[mbd7]

I've acquired the above unit & cards; the "window" says 800Hz but I can't seem to find any info on these cards. Anybody have something on them? BTW the above number is not the serial number as it has a seperate stamping.