Hey Skipp, Have a look here... http://www.bcfmca.bc.ca/rptvhfmods.html
Cheers! Lee --- In [email protected], "skipp025" <skipp...@...> wrote: > > > > > > > "Jeff DePolo" <jd0@> 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. >
