With the Astron supplies, the 723 regulator does have provision for
remote sensing. And with a bit of work and some extra wiring and
components one can have remote sensing.
I would suggest NOT doing so as remote sensing become "inputs" to the
723 regulator chip and any noise or RF on the remote sensing lines can
be very problematic. Proper filtering and time constants will be
required to prevent oscillations.
My suggestion is to use good quality #10 AWG wire, such as auto primary
wire fitted with correct terminals on the ends. Be sure to correctly
crimp and solder as needed. Suggested length is something less than 10
ft. Also be sure to have a dedicated ground between the ground screw
on the back of the radio to the ground on the power supply.
In the end, if you desire to have remote sensing, purchase a suitable
supply that provides remote sensing. Life will be much easier.
73
Bob, K4TAX
On 12/24/2019 2:20 PM, Karin Johnson wrote:
Why hasn't anyone used remote sensing at the radio voltage input?
As far as I know all of the Astron supplies don't have external sense
wiring. Many so called professional grade high current supplies provide
For external connection of the voltage sense back to the regulator chip.
I've toyed with this idea a bit but haven't had the time dig in to the
Astron supply I have. If this were implemented then one could maintain
13.8 volts or whatever you desired at the radio power supply inputs,
Regardless of the current draw.
Karin Anne Johnson K3UU
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