Johnson provided an optional attenuator as far back as the Desk KW of the
50's to alow different exciters to be used as well as AB2 and Class C.
They didnt sell it at a ridiculous mark up either.
Carl
KM1H
----- Original Message -----
From: "Michael Tope" <W4EF@dellroy.com>
To: <amps@contesting.com>
Sent: Friday, July 27, 2012 9:13 AM
Subject: Re: [Amps] Overdrive protection
> On 7/26/2012 11:49 AM, Jim Barber wrote:
>>
>> Perhaps a bad attitude, but I for one appreciate lower drive
>> requirements for
>> high(er) duty-cycle modes. (RTTY, SSTV, AM ...) Let's not give that up
>> for fear of
>> overdrive damage - a front-panel mode switch with a 3dB 50+ watt
>> attenuator could
>> serve both needs.
>>
>> 73,
>> Jim N7CXI
>>
>
> With an extra SO-239 on the rear panel and a coax jumper, the amp
> manufacturer could provide a "loop-thru" for an external power
> attenuator. This would allow the user
> to tailor the drive requirements of the amplifier to their transceiver
> output characteristics by selecting the appropriate attenuator value.
>
> 73, Mike W4EF.....................
>
> _______________________________________________
> Amps mailing list
> Amps@contesting.com
> http://lists.contesting.com/mailman/listinfo/amps
>
>
> -----
> No virus found in this message.
> Checked by AVG - www.avg.com
> Version: 10.0.1424 / Virus Database: 2437/5158 - Release Date: 07/27/12
>
_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps
|