On Jan 9, 2006, at 8:23 AM, Steve Thompson wrote:
>
>
> HAROLD B MANDEL wrote:
>> This question concerns signal cleanliness.
>>
>> A recent thread talks about unclean signals
>> from poor amplifier construction.
>>
>> As an aside, talking with one of the commercial
>> manufacturers earlier, I was told that his products
>> are -49dB down, as opposed to others that were
>> -43dB down.
> Be wary of manufacturer's comparisons. They're often not entirely like
> for like.
Also, corporate ethics permit virtually unlimited prevarication.
>
>>
>> What specific components lead to a betterment
>> of this parameter?
>
> Depends on the amplifier type and design, but the most significant
> factor is usually the rf device and how hard it's run. On tube
> amplifiers, operator ajdustment is likely to dominate over everything
> else.
>
>>
>> In a simple triode, running GG, does the choice
>> of value of the plate blocker, padder caps and
>> tune/load capacitors matter?
>
> Assuming they're all reasonably fit for purpose, probably not, compared
> with how it's tuned and driven.
>
> Steve
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>
Richard L. Measures, AG6K, 805.386.3734. www.somis.org
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