> "Jeff DePolo" <j...@...> wrote:
> Mo's spec for the 9.6V supply is +/- 0.3V on station
> power supplies and +/- 0.5V for the regulator in Micor
> mobiles if I remember right.
Looks good... I actually found the manual to the external power
supply adapter I saw at a repeater site. Looks like the 9.6 Vdc
regulator is inside the box and the results are supplied to the
back plane through a/the "Micor Mic Style Plug" connection.
The diagram for the adapter box also shows +13 Vdc is also routed
to one of the pins in the same plug (as well as ground) so I have
to figure out if that's a requirement or just an addition to the
adapter package. I did see where +13 Vdc was supplied to another
location on the repeater back-plane.
> I use LM7810's (10V 1A fixed regulator), with a 1A Schottky
> rectifier diode (1N5817 for example) in series with the output
> for a little voltage drop.
Works for me as does a few of the other possible circuits others
have mentioned (thank you very much).
> Regulator + diode + filter/bypass caps = less than $1, or
> knowing how big your junk box is Skipp, probably $0. That's
> probably the cheapest solution.
The 2010 Politically Correct phrase for "junk box" parts is
"stuff I plan to use some day". I'll be fine as long as the
camera crews from the TV Show "Hoarders" doesn't come out to
the west coast. There are a lot of us in denial... which is
not a river in Egypt.
> Heat-sink regulator to whatever's handy, tab on the regulator
> is ground as I'm sure you know...
> -- Jeff WN3A
I'm thinking of something mounted right on the Repeater Back
Plane so the leads are short and there's not a requirement for
another box to take up rack space.
thanks much,
s.
