The 87 came out long after the rules changed to 1500W output.
Possibly the LV position was to derate for RTTY and SSTV.
Carl
KM1H
----- Original Message -----
From: "Victor West" <n5yy@bellsouth.net>
To: "Paul Young" <paul@g0hwc.com>; <Amps@contesting.com>
Sent: Tuesday, August 05, 2008 5:02 AM
Subject: Re: [Amps] Alpha 87A Low Voltage Switch
> If I recall correctly, in the "old days", we were limited (by FCC
> regulation) to 1000 watts DC INPUT power to the final amp. stage. The
> amp
> had a CW "high voltage" position to give this 1000 watt input, and a
> higher
> voltage value for SSB. This allowed higher peak SSB powers while still
> keeping to the 1000 Watt DC input limitation. Hence the CW/low and
> SSB/high
> voltage positions.
>
> de Vic, N5YY
>
>
> ----- Original Message -----
> From: "Paul Young" <paul@g0hwc.com>
> To: <Amps@contesting.com>
> Sent: Monday, August 04, 2008 10:54 AM
> Subject: Re: [Amps] Alpha 87A Low Voltage Switch
>
>
>> >Hi Group,
>>>
>>>Anyone know why the Alpha 87A has the hi and lo voltage switch on the
>>>front
>>>panel when it's never supposed to be used on the lo setting? Just
>>>curious.
>>>
>>>73 Jerry
>>>K1JOS
>>
>> I seem to remember seeing something in the Alpha 87a Yahoo Group
>> http://groups.yahoo.com/group/Alpha87a
>>
>> Something about regulations back when they were built ?
>>
>> Paul G0HWC
>>
>> Check out my website www.g0hwc.com / www.sstv.org.uk *Echolink
>> node
>> MB7ICL-L "381900"*
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>>
>
>
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