I did a search on google for 'bd-189 brake delay board' and the first hit
was "Norms Rotor Service".
Check their website and see if the instructions are downloadable, or contact
them and ask for/purchase a copy of the bd-1890 instructions.
You might check the hy-gain.com website for Ham series rotator manuals (PDF)
if you don't already have one.
My Ham-IV manual says there is a 13v zener across C1/Pin7 junction and the
R1/F1 junction.
The 'normal' diode is simply listed as CR1 and no value given. I would
expect it's around a 1n4001/2/3 or something...it's just handling metering
current levels.
73,
Dale, kg5u
>
> I have an older CDE Ham II Control box that the meter circuit
> no longer functions, I would like to know if anyone knows the
> values for D1 and D2, One appears to be a zener diode the
> other a regular one. Upon opening my control box I found a
> BD-189 break delay board just sitting inside that was never
> installed by the previous owner, I guess he had planned to
> install it at a later date , but forgot he put it there, and
> it has since taken out both diodes. If you have some
> information for me I would be very grateful to hear from you
> either on or off the list...
>
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