Differences between the 806, 807, & 808

[GM]

Change the diaphragm load in an 808 to a 34647 and no loading cap add felt damping, and you now have an 802.

Yep, my pair of '802-8D' have 808-8A labels on them since I could buy them at a MI store and have them trade me diaphragms for considerably less than the distributor price for properly labeled units. Later, I re-installed the 'free' loading caps after bouncing the 23744s off the phase plugs.

Hmm, just noticed the 802-8D labels listing Symbiotiks, so if mine are 802D except 8 ohms, then what is it if not an -8D?

GM

[bowtie427ss]

Later, I re-installed the 'free' loading caps after bouncing the 23744s off the phase plugs.

You needed some of those paper shims they used at the factory when final assembling/inspecting the 807's and 808's.

Hmm, just noticed the 802-8D labels listing Symbiotiks, so if mine are 802D except 8 ohms, then what is it if not an -8D?

I'm pretty sure those never had symbiotik diaphragms in them, the date codes on the diaphragms themselves are within a few weeks of the other components in that pair of 9846's.

Possible the diaphragms could have been swapped out at the time of purchase.

I wonder if it's also possible that no 802-8D's ever had symbiotiks?

[GM]

IIRC correctly they came with a paper shim attached which at the time I assumed was a gasket.

Wonder why the labels have 'Symbiotik' on them then? Made in error and Altec chose to use them anyway? He asks rhetorically. Oh well, just one more discrepancy to add to all the others as Altec was being gutted.

GM

[bowtie427ss]

Wonder why the labels have 'Symbiotik' on them then?

It defies all logic that i'm able to apply.

[Old Guy]

Not sure how the foilcals were imaged. But there may have been two operations, one with basic, a second with model info.

That way a master run could have been done for the "regular" and "Symbiotik" units, the they were just run tru a second time to fill in model.

Or, if it was letterpress, could be as simple as a lazy operator who didn't remove the "Symbiotik" type slug.

Either way postulates a few were used before somebody caught it.

Google image shows mostly 802d with foilcal labels "Symbiotik", one Japanese site shows a dismantled one that bears out Bowtie's argument.
Have never seen this label....

?C?O???[?J?[ ?? ALTEC ?? ALTEC 802-8D pair

ever seen greenies ...

2 Altec 802-D 802D 16 ohms High Frequency Drivers - eBay (item 200567441651 end time Jan-27-11 08:32:12 PST)


And to go off on a REAL tangent...

Lansing 601 + successor + field-coil + Altec 604 - eBay (item 330494687168 end time Jan-15-11 14:50:22 PST)

[rontec]

These are 808 8b's that I use with 511b's. Of coarse the one w/o the phase plug is restricted in both sensitivity as well as H.freq. response. I haven't measured them but it's obvious while listening to them.
One of these days I'll send them to GPA for new 23744's and a phase plug.
That should give me 802's right? (Now what about 902's?)

[Altec Best]

FWIW, in reference to the other thread, i don't consider the 23746 driver to specifically be an 806-8A(Brad enlightened me to this idea a while back), it's simply a "23746" specifically designed for the few speaker systems in which it was used. Since in many cases the difference between models of compression drivers has to do specifically with the diaphragm load, we probably should not call a 23746 an 806-8A since it does not contain an 806-8A diaphragm load.

Just my .02........................ don't quote me as the last word but i think this is a reasonable summary

I think Altec just made slight changes(Ex.Diaphragms) they got a new model #.You can go nuts trying to keep up with them all.

Now WRT the 23746 was just a part # given before model # designation IME.I have a picture I saved I have to find it now.That had a 806-8A label and the ink stamps on the back covers too, 23746.

Another instance of this is the 033952 stamp that later got the model # 802-8G for the most part I think Altec used part #'s inside sealed cabinets were they wouldn't be seen.You can see how confusing it can get when they use just #'s and when the ink stamp wasn't stamped clearly you could imagine trying to order parts for a driver that looks like # ah I can only read 3 numbers on the cover but looks like so and so.

I thought that Symbiotik was just a reference to the phenolic diaphragm installed and that's all.Same driver just different diaphragms, they have lower top end response, but will handle more power than a standard aluminium.

[rontec]

for new 23744's

Oops, not 23744's but I was told it would be 33952's to make them 802's !?