----- Original Message -----
From: "m.ford" <k1ern@pioneerwireless.net>
To: "Gary Schafer" <garyschafer@comcast.net>
Sent: Tuesday, July 18, 2006 6:23 AM
Subject: Re: [Amps] transformers
>
> ----- Original Message -----
> From: "Gary Schafer" <garyschafer@comcast.net>
> To: "'m.ford'" <k1ern@pioneerwireless.net>
> Cc: <amps@contesting.com>
> Sent: Tuesday, July 18, 2006 1:20 AM
> Subject: RE: [Amps] transformers
>
>
>>
>>
>>> -----Original Message-----
>>> From: m.ford [mailto:k1ern@pioneerwireless.net]
>>> Sent: Monday, July 17, 2006 9:52 PM
>>> To: Gary Schafer
>>> Cc: amps@contesting.com
>>> Subject: Re: [Amps] transformers
>>>
>>>
>>> ----- Original Message -----
>>> From: "Gary Schafer" <garyschafer@comcast.net>
>>> To: "'m.ford'" <k1ern@pioneerwireless.net>
>>> Cc: <amps@contesting.com>
>>> Sent: Monday, July 17, 2006 9:37 PM
>>> Subject: RE: [Amps] transformers
>>>
>>>
>>> >
>>> >
>>> >> -----Original Message-----
>>> >> From: m.ford [mailto:k1ern@pioneerwireless.net]
>>> >> Sent: Monday, July 17, 2006 12:47 PM
>>> >> To: Gary Schafer
>>> >> Cc: amps@contesting.com
>>> >> Subject: Re: [Amps] transformers
>>> >>
>>> >>
>>> >> ----- Original Message -----
>>> >> From: "Gary Schafer" <garyschafer@comcast.net>
>>> >> To: "'m.ford'" <k1ern@pioneerwireless.net>; "'Tom W8JI'"
>>> <w8ji@w8ji.com>
>>> >> Cc: <amps@contesting.com>
>>> >> Sent: Monday, July 17, 2006 11:16 AM
>>> >> Subject: RE: [Amps] transformers
>>> >>
>>> >>
>>> >> >
>>> >> >
>>> >> >> As for PEP. I always felt it was a marketing term. Never bothered
>>> with
>>> >> it
>>> >> >> and from the lengthy discussion here I have learned nothing new.
>>> >> >
>>> >> > How else would you measure SSB power if not PEP?
>>> >> >
>>> >> > 73
>>> >> > Gary K4FMX
>>> >> >
>>> >> >
>>> >> Hi Gary. Define the term "SSB power".
>>> >>
>>> >> Mike k1ern
>>> >
>>> > That's my question Mike.
>>> >
>>> > Rephrased; how would you rate the power output of an SSB transmitter?
>>> What
>>> > units would you express the output power in?
>>> >
>>> > 73
>>> > Gary K4FMX
>>> >
>>> >
>>> Watts come to mind.
>>
>> What kind of watts?
>
> Watts is Watts. You can re-visit the argument about rms vs average
> but in the end Watts is Watts. I think you are coming dangerously close
> to another term that is used in certain circles. "talk power".
>
> Mike k1ern
>
>
>>
>>>
>>> I think what you are trying to ask is how would I measure
>>> the total power emitted from a transmitter that is modulated by single
>>> sideband voice.
>>> Two ways come to mind. First I would use a spectrum analyzer and crank up
>>> the
>>> persistance then measure the area under the curve. The rest is math. But
>>> now you have to assume a bandwidth.
>>
>> You would also have to designate a given time for the measurement. Watt
>> seconds would be the result? You would also have to know the amount of
>> compression and the frequency content of the audio.
>> PEP seems a little more practical.
>>
>>>
>>> The second way would be to actually calculate and sum the area under each
>>> envelope of each tone
>>> produced and do it in real time.
>>
>> It seems that would be a necessity with your method.
>>
>>>Oh, and while we are splitting hairs,
>>> don't forget the carrier
>>> suppression. A lot of ssb I hear, isn't.
>>
>> Also amount of distortion products present would be necessary to know if you
>> are worried about carrier.
>>
>>>
>>> As I recall, the advent of PEP brought us cross needle peak reading power
>>> meters.
>>> I think an artificial horizon indicator would yield more useable results.
>>>
>>> Mike k1ern
>>
>> You seem to be saying that finding total average power over a given amount
>> of time would be the way to make the measurement. That would be highly
>> dependent on program material (voice frequency range, density, bandwidth
>> etc.) and would tell you little about the capabilities of a particular
>> transmitters power output abilities.
>>
>> The peak reading wattmeter still seems the most practical of solutions from
>> what you have described.
>>
>> 73
>> Gary K4FMX
>>
>>
>>
>>
>>
>> --
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>>
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