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 <[email protected]
<mailto:[email protected]>> 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:[email protected] <mailto:[email protected]>>
Sent: Saturday, April 25, 2020 9:03 AM
To: Bob McGraw K4TAX<mailto:[email protected]
<mailto:[email protected]>>
Cc: [email protected]
<mailto:[email protected]><mailto:[email protected]
<mailto:[email protected]>>
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 <[email protected]
<mailto:[email protected]>> 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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