Motorola SDA7 Dual Transistor
allisonportable at gmail.com
Mon Jun 5 17:07:08 CDT 2017
On 06/05/2017 05:38 PM, Al Kossow via cctalk wrote:
> On 6/5/17 2:06 PM, Brent Hilpert via cctalk wrote:
>> I checked several Moto databooks from 1969 into the 70s last night and didn't find it. (Not to suggest my checking is the last word).
>> SDA7 is not a 'standard' Motorola-style number.
>> Might have been a custom order.
> the 1972 books came in today, and I see no sign of them either.
SD can be anything but usually with moto its a special tested or special
package sometimes both. For that PS I've used
a pair of 2n2905s with their cans soldered together (thermal common)
after picking two with the same beta and Vbe.
Works fine for 20 years so far.
No majick there.
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