[Elecraft] Using Yaesu Quadra VL-1000 with K3/ ALC?

[Joe Subich, W4TV]

*IF* the user can remember to turn the exciter power level down before
turning on the amplifier, ALC is not necessary.  However, it remains the
only failsafe way to prevent damage to the amplifier from sustained
overdrive. Given the cost of replacing transistors in the amplifiers,
I would certainly implement ALC with any amplifier (unless, of course,
it could automatically set exciter power level as the KPA500 or KPA1500
with the K3/K3S).

73,

    ... Joe, W4TV


On 2020-07-17 8:59 AM, john at kk9a.com wrote:
> Every amp that I use I would overdrive with the Elecraft set at 100 
> watts. I am not familiar with the Quadra, I typically adjust the PWR 
> (power output) control to the desired wattage and have not had an issue 
> with any that that I have used. I see a lot of talk about using ALC on 
> the SPE Expert amp list. I have not used this brand and do not why ALC 
> appears to be recommend for them.  I have not connected an ALC cable in 
> decades.
> 
> John KK9A
> 
> 
> Joe Subich, W4TV wrote:
> 
>   > Is it necessary?
> 
> Yes.  The Quadra produces is rated 1000 W output with approximately
> 60W drive.  The K3 will overdrive it resulting in splatter/IMD and
> potential damage to the transistors.
> 
> 73,
> 
>      ... Joe, W4TV
> 
> 
> On 2020-07-16 7:25 PM, Dean L wrote:
>> I'm working on a Yaesu VL1000 for a friend and wondering if anybody's had
>> experience setting up ALC with the K3 and the VL1000?
>> Is it necessary?
>> I'm not much of a QRO guy as you can probably tell.
>>
>> Thanks in advance for your help 73
>>
>> Dean K2WW
>