[Elecraft] K3 - Power cable voltage drop

[Bob McGraw K4TAX]

Yes, but one screw-up on the remote sensing system and it will take 
advantage of the voltage overhead on the pass transistors and likely 
wipe out every piece of equipment.       I strongly do not advise it.   
And you make a valid point for NOT using remote sensing.

73

Bob, K4TAX

On 12/24/2019 3:22 PM, Jim Rhodes wrote:
> I have thought about doing that. Just requires a 2 wire hookup with small
> gauge wire. But I run all of my small items like the remoterig box, LP-pan
> box, VHF/UHF rig and so forth off of the main supply and if I have a larger
> than anticipated voltage drop on rig power cable the voltage on the other
> tings could go fairly high. The power supply is a HB thing with at least a
> 50 amp capacity and plenty of voltage overhead before pass transistors.
> (Used to run 2 HF rigs before downsizing.)
>
>
> On Tue, Dec 24, 2019 at 2:25 PM Rose <elecraftcovers at gmail.com> wrote:
>
>> First, it would require some basic technical skill ... (;-)
>>
>> 73
>>
>> K0PP
>>
>> On Tue, Dec 24, 2019, 13:20 Karin Johnson <karinann at tampabay.rr.com>
>> 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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>