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Re: [Amps] ALC Overshoot FTDX-5000

To: amps@contesting.com
Subject: Re: [Amps] ALC Overshoot FTDX-5000
From: "Joe Subich, W4TV" <lists@subich.com>
Date: Tue, 14 Aug 2012 01:26:52 -0400
List-post: <amps@contesting.com">mailto:amps@contesting.com>
On 8/14/2012 12:42 AM, Larry Benko wrote:
 > Not to nit pick but 60wpm is 20.0ms/dit.

Yes, I missed the "I" when I did the quick calculation.  I never
remember the number when I need it <G>.

In any case it doesn't change the fact that reading the correct power
in a 20 or 24 ms period would not be any indication of the ability to
catch a 2ms overshoot.

73,

    ... Joe, W4TV


On 8/14/2012 12:42 AM, Larry Benko wrote:
> Not to nit pick but 60wpm is 20.0ms/dit.
>
> Letter spacing = 3 dits and word spacing = 7dits
>
> P = 11 + 3
> A = 5 + 3
> R = 7 + 3
> I = 3 + 3
> S = 5 + 7
>
> Total = 50 dit times
> Therefore dit time = 1.2 / WPM
>
> 73,
> Larry, W0QE
>
> On 8/13/2012 8:45 PM, Joe Subich, W4TV wrote:
>>    > But It measures a single dit at 60 WPM CW just fine.
>>
>> Not probative - a single dit at 60 WPM is 24 msec.  "PARIS" is 42 bit
>> (dot) periods ... 1/42 => 24 ms.
>>
>> Now, if you tell me the Powermaster can measure a single dit at 600
>> WPM, I will accept it as a reasonable measurement of "overshoot".
>> Otherwise, the measurement is simply the average power over the dit
>> period and a 15% "overshoot" could indicate 100-150% real overshoot
>> for 2 ms out of a 25 ms period.
>>
>> I'm not saying that's the case, simply that Powermaster is not a valid
>> tool on which to base the claim of "no overshoot".
>>
>> 73,
>>
>>       ... Joe, W4TV
>>
>>
>> On 8/13/2012 9:57 PM, Jim W7RY wrote:
>>> Not sure. But It measures a single dit at 60 WPM CW just fine.
>>>
>>> 73
>>> Jim W7RY
>>>
>>>
>>>
>>>
>>> -----Original Message----- From: Joe Subich, W4TV
>>> Sent: Monday, August 13, 2012 6:12 PM
>>> To: amps@contesting.com
>>> Subject: Re: [Amps] ALC Overshoot FTDX-5000
>>>
>>>
>>> What is the time constant of the Powermaster?  Then only clear way to
>>> measure the sub 5 ms spikes is with a scope.
>>>
>>> 73,
>>>
>>>       ... Joe, W4TV
>>>
>>>
>>> On 8/13/2012 8:56 PM, Peter Voelpel wrote:
>>>> That is no ALC overshoot, but the breathing power supply
>>>>
>>>> 73
>>>> Peter, DJ7WW
>>>>
>>>> -----Original Message-----
>>>> From: amps-bounces@contesting.com [mailto:amps-bounces@contesting.com] On
>>>> Behalf Of Jim W7RY
>>>> Sent: Dienstag, 14. August 2012 02:46
>>>> To: AMPS
>>>> Subject: [Amps] ALC Overshoot FTDX-5000
>>>>
>>>> I thought you would like to know what a friend of mine found on his new
>>>> (less than 1 year old) FTDX-5000 for ALC overshoot...
>>>>
>>>> Setting the power out to 25.5 watts the overshoot reached 26.9
>>>> amounting to
>>>> 1.4 watts overshoot Both cw and rtty came up the same.
>>>>
>>>>
>>>> Using 101 watts the overshoot reached 104
>>>>
>>>> He used a Powermaster and a dummy load.
>>>>
>>>> 73
>>>> Jim W7RY
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>>>>
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