[Elecraft] K3S poor CW keying further investigation
Ron Manfredi
wa2eio at optonline.net
Sat Apr 25 11:12:47 EDT 2020
Fewer power supplies (meaning the switching type) have actual terminal
bolts to use with ring connectors. If the supply doesn't have that type
of connector, then what alternatives are there to being able to use one
supply in a station that has more than one high current rig, (even if
they are not used at the same time) since the connectors on most of
these supplies will take at most only one 10-12 gauge cable?
Ron WA2EIO
On 4/25/2020 10:56 AM, Bob McGraw K4TAX wrote:
> Jim et al:
>
> Thank you for confirming exactly what I've written and suggested.
>
> TO ALL........PLEASE do not use power strips to supply DC to your
> radio from your power supply. ALWAYS connect the radio direct to the
> power supply terminals. The power pole and DC distributions strips
> are ok for LED lightning and such but NEVER for anything drawing over
> about 2 amps. I don't care what the manufacturer says they are
> "rated" for. E = I x R. Every connections adds resistance. Do
> the math.
>
> 73
>
> Bob, K4TAX
>
> On 4/25/2020 9:32 AM, Jim Rhodes wrote:
>> I had been using a power pole strip to power everything. After seeing
>> some discussion on this topic some time ago I found that in the
>> string of 3 power pole connections in my setup at the time I was
>> seeing around a 1 volt drop in the voltage on the K3 metering between
>> receive and 100 watts keydown. That voltage drop was confirmed by my
>> VOM so I wired the rig directly to the supply and the voltage drop
>> was less than 0.25 volts. That is the way my rigs and VHF/UHF amps
>> will be connected from now on with only a fuse inline. The low
>> current stuff will stay on the power pole strip where they do just
>> fine lighting up lights and stuff.
>>
>> On Sat, Apr 25, 2020, 09:16 Don Schroder <donanddeena at hotmail.com
>> <mailto:donanddeena at hotmail.com>> wrote:
>>
>> Bob,
>>
>> Is it safe to run my K2 using Anderson Power Pole connections,
>> and/or RigRunner equipment?
>>
>> For my info, what is the reason for NOT using them?
>>
>> I’m rewiring, and I want to do it right!
>>
>> Gunny, KE0PVQ
>>
>> Sent from Mail<https://go.microsoft.com/fwlink/?LinkId=550986> for
>> Windows 10
>>
>> From: Gmail<mailto:anyone1545 at gmail.com
>> <mailto:anyone1545 at gmail.com>>
>> Sent: Saturday, April 25, 2020 9:03 AM
>> To: Bob McGraw K4TAX<mailto:rmcgraw at blomand.net
>> <mailto:rmcgraw at blomand.net>>
>> Cc: Elecraft at mailman.qth.net
>> <mailto:Elecraft at mailman.qth.net><mailto:Elecraft at mailman.qth.net
>> <mailto:Elecraft at mailman.qth.net>>
>> Subject: Re: [Elecraft] K3S poor CW keying further investigation
>>
>> Nuts, just measure the drop between radio and power supply see if
>> it is reasonable. Mine is 0.25 volts when transmitting. I run
>> 14.0 out of supply.
>> Ray
>> W8LYJ
>>
>> Sent from my iPad
>>
>> > On Apr 25, 2020, at 07:48, Bob McGraw K4TAX <rmcgraw at blomand.net
>> <mailto:rmcgraw at blomand.net>> wrote:
>> >
>> > As to the RigRunner power pole strip.........PUT IT IN THE
>> TRASH where it belongs. NEVER NEVER NEVER use a power
>> distribution strip to power a 100 watt radio. ALWAYS connect the
>> radio direct to the power supply terminals. NO exceptions!
>> >
>> > 73
>> >
>> > Bob, K4TAX
>> >
>> >
>> >> On 4/25/2020 7:13 AM, Chuck Chandler wrote:
>> >> After more checking, I suspect the internal 100W amp is the
>> common factor
>> >> in the poor keying characteristics I'm seeing and hearing about
>> from my
>> >> rig. I am trying to determine if my power supply is doing it's
>> job.
>> >>
>> >> I'm using a TenTec 963 switching supply rated at 25A
>> continuous. At rest
>> >> the K3S panel display shows 13.6V, with full power key down it
>> dips to 11.5
>> >> or so. This seems like a lot. I'm running the power cable
>> thru a
>> >> RigRunner Powerpole strip. If I can dig out another power
>> supply from the
>> >> packed boxes I can wire the K3S directly to the supply.
>> >>
>> >> Is 11.5V at key down enough to cause the slow rise time being
>> reported?
>> >>
>> >> 73 de Chuck, WS1L
>> >>
>> >
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