[TowerTalk] BigIR question

Wes Stewart wes_n7ws at triconet.org
Mon Dec 11 16:20:17 EST 2017


So?  If they spec the antenna in PEP that suggests it's peak limited.  If it's 
average power limited, then they should say so.  Apparently they did, after the 
fact.

On 12/7/2017 2:41 PM, Gary Schafer wrote:
> That's a whole lot more average power than a 1500 watt SSB signal.
>
> 73
> Gary  K4FMX
>
>> -----Original Message-----
>> From: TowerTalk [mailto:towertalk-bounces at contesting.com] On Behalf Of
>> Wes Stewart
>> Sent: Thursday, December 07, 2017 12:50 PM
>> To: towertalk at contesting.com
>> Subject: Re: [TowerTalk] BigIR question
>>
>> Legal power for classic AM on 80 meters is 375 W of carrier power.  If
>> you run
>> this then the PEP is 1500W and the antenna is within spec.
>>
>> Wes  N7WS
>> '
>> On 12/7/2017 7:52 AM, Keith Dutson wrote:
>>> That sounds reasonable.  You might want to contact SteppIR to help
>> detect the problem.
>>>
>>>
>>> I was using a vertical antenna rated for 1500 watts, but it failed
>> using 1500 watts AM on 80 meters.  SWR went very high causing amp (Alpha
>> 87A) to fault.  Manufacturer said it would not handle AM, only PEP.  So
>> much for my demonstration to a friend. <grin>
>>>
>>>
>>> 73, Keith NM5G
>>>
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>



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