[Elecraft] K3S poor CW keying further investigation
Frank Krozel
kg9hfrank at gmail.com
Sat Apr 25 12:27:27 EDT 2020
I agree with Bob, TAX.
if it doesn't have the connectors you need, then don't buy it.
The message is pretty clear if one has the needed connectors for that power level and the other doesn’t.
One sits on the shelf of the vendor, the other one flys off the shelf.
-73- Frank KG9H
kg9hfrank at gmail.com
> On Apr 25, 2020, at 11:24 AM, Martin Sole <hs0zed at gmail.com> wrote:
>
> DISP and rotate vfo B for desired measurement option.
>
> Martin, HS0ZED
>
>
>
> On 25/04/2020 23:19, N4ZR wrote:
>> That's right - my focus was (perhaps too narrowly) on the behavior of the power supply under load, not on losses in the system. Now if someone can just tell me how to read the voltage at the transceiver - I know there's a menu setting somewhere but my radio is fairly early and the manual doesn't say.
>>
>> 73, Pete N4ZR
>> Check out the Reverse Beacon Network
>> at <http://reversebeacon.net>, now
>> spotting RTTY activity worldwide.
>> For spots, please use your favorite
>> "retail" DX cluster.
>>
>> On 4/25/2020 11:25 AM, hawley, charles j jr wrote:
>>> I did notice that the post mentioned that his power supply dipped in voltage but as for preventing issues due to low voltage, it's not your voltmeter on the power supply that is the proper indicator. It is the voltage on the input to the K3 that you should be noting. It's available on the menu and displays in the VFO B area on the screen.
>>>
>>> Jack BMW Motorcycles
>>> Chuck KE9UW
>>> c-hawley at illinois.edu
>>>
>>> Sent from my iPad
>>>
>>>> On Apr 25, 2020, at 9:51 AM, N4ZR <n4zr at comcast.net> wrote:
>>>>
>>>> For whatever it may be worth, my K3 is run through a West Mountain RigRunner 4005i, and the voltmeter on my SEC 1235M doesn't even flicker when I go key-down at 100 watts.
>>>>
>>>> I'm wondering if a 25-amp-rated supply (perhaps a little optimistic) might be to blame. My K3 draws 20.2 amps at 100 watts key down.
>>>>
>>>> 73, Pete N4ZR
>>>> Check out the Reverse Beacon Network
>>>> at <http://reversebeacon.net>, now
>>>> spotting RTTY activity worldwide.
>>>> For spots, please use your favorite
>>>> "retail" DX cluster.
>>>>
>>>>> On 4/25/2020 10:32 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> 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>
>>>>>> Sent: Saturday, April 25, 2020 9:03 AM
>>>>>> To: Bob McGraw K4TAX<mailto:rmcgraw at blomand.net>
>>>>>> Cc: 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> 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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