Altec 1285-8B Crossovers

[Art J.]

I took a look at my old 30923 and it has the number 391427 on it.
It must be a batch number or inventory number. Who knows.
Yours is old like mine because it has the Callins capacitor.
They have been out of business for a long time.
Mine came from an early 70's model of the 9846 shown in the avatar.

[voice of the theater]

I took a look at my old 30923 and it has the number 391427 on it.
It must be a batch number or inventory number. Who knows.
Yours is old like mine because it has the Callins capacitor.
They have been out of business for a long time.
Mine came from an early 70's model of the 9846 shown in the avatar.

391427 is the Altec date code. All their date codes from that era start with 391. The 4 stands for the last digit of the year of manufacture--in your case since your 9846's are from the 70's it stands for 1974. The 27 indicates a manufacture date of the 27th week of 1974 FWIW,,,,,,,,

[Art J.]

391427 is the Altec date code. All their date codes from that era start with 391. The 4 stands for the last digit of the year of manufacture--in your case since your 9846's are from the 70's it stands for 1974. The 27 indicates a manufacture date of the 27th week of 1974 FWIW,,,,,,,,

Thanks very much for that info. I must really be losing it. Their have been plenty
of posts in the past about the 391 numbers and I didn't make the connection.
That's why this is a group effort here. Thanks again..........

[Altec Best]

Hey Brad, I have been reading about those attenuators well at least about the 30904 and there main function is to match medium efficiency LF drivers to high efficiency HF drivers.I'll assume that the 30923 is a similar network attenuator.It says that the 30904 was specifically developed for the 411.I have a pair of those so this may come in handy. But Thank You for peaking my curiosity which made me dig deeper for a use for these.@Dsauro Dave I probably won't be using these anytime soon.But if i do find an improvement WRT the 1285-8B will be sure to pass it a long.


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