Help...Heath Keyer Question for SA-5010

[Jack Nelson]

hi chris
you need 11-16 v ac/dc @250 ma the polarity is unimportant as the power is fed thru a
diode bridge  but i think the heath power supply have the center pin positive.
the + output is driven by an npn (417-297)transistor and the - outpit is driven by a pnp
darlington pair (417-235 &417-927) transistors max rating on both is 250 vdc at 100 ma..
hope this helps
de Jx ka7vym
p.s. the numbers in (  ) is heath part numbers
Chris KX0Y wrote:

> I just got one of these keyers today, it is the one with the capacitive
> paddles and the membrane keypad.  Unfortunately I did not get a power supply
> or manual with the unit.
>
> Questions:
>
> 1.  What is the power requirement, voltage and current?
> 2.  What is the polarity of the power socket?
> 3. Does the keying line use a transistor, fet or relay?
>
> Many Thanks!
> Chris
>
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