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[AMPS] Fw: Two Tone Tests

To: <amps@contesting.com>
Subject: [AMPS] Fw: Two Tone Tests
From: k7fm@teleport.com (Lamb)
Date: Wed, 22 Dec 1999 21:12:42 -0800

----- Original Message -----
From: Lamb <k7fm@teleport.com>
To: <k5ra@mail.pulse.net>
Sent: Wednesday, December 22, 1999 9:11 PM
Subject: Re: Two Tone Tests


> I agree that 2 tone tests are not conclusive.  But, I only stated that:
>
> "Once you argue that the cause for distortion is excessive grid current,
> then you must accept succesful plots of 2 tone tests as proof that
> either  the G2DAF circuitry does not have excessive grid current or that
> it does not matter."
>
> If the G2DAF can pass a 2 tone imd test, it does not prove that it does
not
> have intermod. or that it does not splatter.  However,  it has been argued
> that the G2DAF circuit has so much grid current that it cannot be linear,
> and the worst case would be at full drive during a 2 tone test.  Passing
the
> 2 tone test would simply prove that  the G2DAF circuit does not develop
> "too" much grid current to be linear.  It can be non-linear for other
> reasons - but not excessive grid current.
>
> In this case, the 2 tone test would simply disprove something.  And,
> sometimes knowledge is obtained by eliminating falsehoods and
concentrating
> on the facts.
>
> 73,  Colin  K7FM
>
>


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