[Elecraft] SS30DV feedback

[Eric Swartz - WA6HHQ, Elecraft]

We're hitting the posting limit on this one. Let's wind it down in the next 3-4 
posts at most. Then thread closed for now.

Eric
/elecraft.com/

On 10/2/2015 4:32 PM, Joe Subich, W4TV wrote:
>
>> Doing so reduces any IR drop on power supply wiring by a factor of 2
>> or 3.
>
> Higher voltage - 24 or 40 V results in decreasing the voltage drop by a
> factor or 4 or 9.  The voltage drop is a function of current *squared*.
>
> 24 or 48 volt finals certainly produce much cleaner signals as the
> active devices are not likely to be driven into current saturation
> *or* cutoff in order to reach useful power output where the 12V devices
> are pushed to the wall to make 100W output.
>
> 73,
>
>   ... Joe, W4TV
>
>
> On 10/2/2015 4:12 PM, brian wrote:
>> Fred,
>> I'm a fan of higher voltage -- perhaps 24 or 40 volts so that PA
>> transistors can produce cleaner signals.   Doing so reduces any IR drop
>> on power supply wiring by a factor of 2 or 3.  KISS.
>>
>>   IC's are going to lower and lower voltages.   Multiple circuits within
>> boxes require a menagerie of voltages.   One is faced with having to
>> generate more heat in regulators dropping 40 volts to 12, maybe 5, 3.3
>> and 1.6 V.   Perhaps the era of efficient multivoltage power supplies
>> with multiple wires for multiple voltages will return. (Remember
>> filament ,plate, screen and grid voltage power supplies in days of
>> yore?  Guys generally didn't mistakenly hook up the 3500 V B+ wire to
>> the filaments......)
>>
>> 73 de Brian/K3KO
>>
>>
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