...@no6b.com n...@no6b.com
To: Repeater-Builder@yahoogroups.com
Sent: Sat, February 27, 2010 6:25:09 PM
Subject: Re: [Repeater-Builder] Re: Micor UHF Repeater Base 9.6 vdc current
requirement?
At 2/25/2010 12:36, you wrote:
Build it yourself. Use an LM7808 and and series two 1N4001's to lift
In a station, the 9.6 volt circuitry *could* be run from 12 volts, as
long as its regulated. I'm not suggesting someone does that, because
the circuits were optimized for 9.6 volts, but I'm trying to
make a point.
Point taken, but to add to your cautionary note, there are some circuits
the ground
lead to the tap. See:
http://www.national.com/ds/LM/LM340.pdf.
73,
Bob, WA9FBO
-Original Message-
From: Jeff DePolo j...@broadsci.com
To: Repeater-Builder@yahoogroups.com
Sent: Sat, Feb 27, 2010 9:32 am
Subject: RE: [Repeater-Builder] Re: Micor UHF Repeater Base 9.6
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
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
How about a 7809 regulator IC with a 1N4004 diode in the ground leg to
raise the output voltage to 9.6V?
I was envisioning mounting it to something metal for heatsinking purposes,
but I guess you could probably use one of the screws on the backplane plus a
little TO220 heat sink. Whatever
Hey Skipp,
Have a look here... http://www.bcfmca.bc.ca/rptvhfmods.html
Cheers!
Lee
--- In Repeater-Builder@yahoogroups.com, 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
-Builder] Re: Micor UHF Repeater Base 9.6 vdc current
requirement?
How about a 7809 regulator IC with a 1N4004 diode in the ground leg to
raise the output voltage to 9.6V?
I was envisioning mounting it to something metal for heatsinking purposes,
but I guess you could probably use one
DCFluX wrote:
How about a 7809 regulator IC with a 1N4004 diode in the ground leg to
raise the output voltage to 9.6V?
There is nothing mysterious about 9.6 volts. It could be 9.00 volts
10.00 volts 11.00 12.00 volts or *anything* in between. The part that
is critical is that it is stiffly
In that case Just a straight 7809 or 7810 also would not require
isolating the tab and can be mounted straight to the metal chassis.
If it were me, I'd just use a 9 or 10 volt three terminal regulator
(7809 or 7810) and skip the whole LM-317 or diodes in the ground leg
deal. It only serves to
DCFluX wrote:
In that case Just a straight 7809 or 7810 also would not require
isolating the tab and can be mounted straight to the metal chassis.
If it were me, I'd just use a 9 or 10 volt three terminal regulator
(7809 or 7810) and skip the whole LM-317 or diodes in the ground leg
deal.
A'tank u viry much
Less than 1 Amp is the good news...
Now instead of building a 3 terminal LM-317 regulator circuit
do we want to instead buy a pre-made complete regulator board
off Ebay for about $7 and shipping?
A main switcher power supply or off a site DC source and the
electric bill
, February 25, 2010 9:58:50 AM
Subject: [Repeater-Builder] Re: Micor UHF Repeater Base 9.6 vdc current
requirement?
A'tank u viry much
Less than 1 Amp is the good news...
Now instead of building a 3 terminal LM-317 regulator circuit
do we want to instead buy a pre-made complete regulator board
Hey Skipp,
I've just removed the AC supply from a SpectraTac receiver
shelf. Has a Micor RX a couple of cards. System draws
less than 200ma.
I used an LM317 (a couple of caps R's)... soldered the tab
directly to a piece of PCB material. Runs all day long with
12 input doesn't even get
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