Those 4 digit codes go back to at least the early 60's Paul. I have them
here on tubes, filter caps, diode stacks, xfmrs and more.
Carl
KM1H
----- Original Message -----
From: "Paul Christensen" <w9ac@arrl.net>
To: <amps@contesting.com>
Sent: Wednesday, March 31, 2010 4:26 PM
Subject: Re: [Amps] Semtech SA1388?
>> showing the anode/cathode ends. Also, the number "6824" is printed on
>> the
>> case following the diode schematic.
>
> "6824" could relate to the manufacturing date code of the 24th week of
> 1968,
> although I've not seen many four-digit date codes used on components
> before
> the mid '70s. Semtech was around in 1970 when Alpha produced its first
> two
> amps, so perhaps it's a valid date code.
>
> I checked my Semtech data sheets and find nothing on it.
>
> Paul, W9AC
>
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