Interesting, I have 4 TS-830's and none do it.
And couldnt get 150W out of them either. One is specifically used to test
amps and the others were all thoroughly tested before being put into driving
transverters duty.
Carl
KM1H
----- Original Message -----
From: "Jim W7RY" <jimw7ry@gmail.com>
To: "Joe Subich, W4TV" <lists@subich.com>; <amps@contesting.com>
Sent: Thursday, July 26, 2012 9:21 PM
Subject: Re: [Amps] Overdrive protection
> My Icom 7600, 751A and IC7200 don’t have the problem. The Kenwood TS-830S
> on
> the other hand.... 150+ watts on first keyup.
>
> 73
> Jim W7RY
>
>
> -----Original Message-----
> From: Joe Subich, W4TV
> Sent: Thursday, July 26, 2012 12:11 PM
> To: amps@contesting.com
> Subject: Re: [Amps] Overdrive protection
>
>
>> My question -- and maybe there's an Alpha employee on the list who
>> wants to answer -- is "isn't it possible to make an overdrive
>> protection circuit that will cause the amplifier to fault fast enough
>> to protect the tubes and components?"
>
> Of course there is but such a protection circuit would make the amp
> almost impossible to use with the many rigs have have a horrendous ALC
> spike on initial key-down. Many of the most commonly used rigs produce
> a full power (or higher) 2-5 ms long even when cranked back to 30 or
> 40 watts.
>
> 73,
>
> ... Joe, W4TV
>
>
> On 7/26/2012 12:36 PM, Vic K2VCO wrote:
>> Alpha's email newsletter talks about damage to amplifiers as a result of
>> overdrive -- the
>> example is given of amplifiers designed to produce 1500w output with 40w
>> drive being
>> driven with 150w. They say that there is a log maintained by the firmware
>> which records
>> overdrive incidents and that they won't repair damage caused by this kind
>> of abuse under
>> warranty.
>>
>> I am sympathetic to their attitude and don't approve of the philosophy
>> that all knobs
>> should always be set to 11. But sometimes it's unintentional.
>>
>> My question -- and maybe there's an Alpha employee on the list who wants
>> to answer -- is
>> "isn't it possible to make an overdrive protection circuit that will
>> cause
>> the amplifier
>> to fault fast enough to protect the tubes and components?"
>>
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