[Yaesu] Ft-920 driver adjust

[Rob]

----- Original Message -----
From: <KA2YKC@aol.com>
To: <yaesu@contesting.com>
Cc: <a_borg@yahoo.com>; <wa3gin@erols.com>
Sent: Tuesday, January 11, 2000 7:43 PM
Subject: Re: [Yaesu] Ft-920 driver adjust


[some stuff deleted here]

> But seriously, while I had the rig open to install the FM board, I decided
to
> go over the radio on the bench.  My shop bench has equipment that the
service
> departments @ the "big three" wish they had!  (Ibuilding PCS networks for
a
> living has its advantages).  As measured  on an HP spectrum analyzer, the
> transmitter was just as clean up to 125w or so, then the IMD just started
to
> increase.  Also, my feeling is if the radio is rated @ 100w, then it
should
> deliver as specified.

Gee Eric, I'd really like to know how you did this. Let me get this
staight... You increased the drive to your final amplifier but the IMD
remained the same while the ouput power increased? That's a neat trick,
since the only way that can happen is if you have no IMD at all. That is, no
high order curvature to the transfer function of the amplifier. We could
make a lot of money on this you know...

>
> BTW, I am tired of the know-it-alls who seem to have to add their
two-cents
> whenever someone asks a technical question.  I wish people would just
answer
> the question(s) or stay QRT. If someone has no technical worth to
contribute,
> they should utilize their time more wisely, like chasing DX (or women) !
>
me too!

>
> 73 Eric
> KK2ED
>

I know, I probably should have just stayed QRT but I couldn't help
myself.You baited me so nicely. I promise I'll never post again... if you
will tell me your secret :-).

73, Rob Hinz - W7NX, BSEE, MSEE, Ph.D ABD.




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