On 4/27/2010 5:00 AM, Anthony Blake wrote:
I was disturbed by their implementation of RS422*without* a ground
return path.. Am I missing something, or is that really dodgey for
distributing PPS?
Yes, it is dodgey. You can make it "work" without a ground, but it is
not to spec and it is
Original Message
Subject: [Milsurplus] Don't Miss NEAR-Fest This Weekend
From:"Todd, KA1KAQ"
Date:Tue, April 27, 2010 6:40 am
To: "Discussion of AM Radio in the Amateur Service"
"milsurplus"
"Hallicrafters R
Neville Michie-"The whole aim of this exercise was to be able to
support the Tbolt with a 12 volt lead acid battery (20AH) and so
have an uninteruptable power supply."
I chose a different route. I bought a small DC-DC converter that runs
from +9 to +18 in and has 3 outputs of +5/+12/-12. The ef
Bob Camp-"The point is that you can indeed get into trouble before the internal
regulator drops out. How much trouble depends on the design of the heater."
I'm not disputing that there might be other effects of dropping the supply
voltage
close to the point where the regulator will lose regulat
Hi,
small world, i just put a power pack together for a Tbolt using a
LT1764 set to just above 11 Volts.
Headroom required is only about 0.15 volts.
A Power Trends 78SR105 module provides up to 1.5 A at 5V and a
ICL7662 gives -11 volts from the +11 volt rail.
The whole aim of this exercise
Hi
The point is that you can indeed get into trouble before the internal regulator
drops out. How much trouble depends on the design of the heater.
Bob
On Apr 26, 2010, at 8:26 PM, Arthur Dent wrote:
> Bob Camp-"In addition to the influence of the voltage on the oscillator, the
> voltage
>
