[1000mp] AM mode MP settings

[WD8ARZ]

Hello Todd, glad to hear from you.

Here are the tips that I have received from on the air tests. Of course if
your microphone or voice is much different than mine, there may need to be
some different audio settings.

I use the Yaesu Dynamic Microphone MD-100a8x.

Dynamic low impedance mikes are less prone to rf getting into them by the
way, as compared to condenser and high impedance mikes.

Normally I run this mike with out using any of the audio tailoring options
switchable on the bottom of the mike base. However in the AM mode, it was
suggested that I run this mike with the High Emphasis enabled, and low cut
off. It works good for me this way in AM mode, but I have all these options
by passed for ssb (thru switch setting).

Turn off the mike processor, and set audio gain where you normally use it
for sideband (11-12 o'clock or so?)
Adjust the Rf power output to no more than 25 watts.

Speak into the mike and adjust the Rf for the best output where the rf
output meter doesn't show any downward swings. A slight wiggle is ok, but no
downward dippings as you speak. If it does, your audio will be muddy and
poor quality. Be careful of the AM tube operators that speak of upward
modulation settings. For them on the tube circuits that support it, that is
very desirable .... you cant adjust the MP for that anyway.

I found that making adjustments a few inches from the mike is best, but be
careful to not get to close to the mike after you make your settings, or you
will see the dipping. It is easier to speak lower and quieter in the AM mode
and still have good audio, than in ssb where we speak up to keep the meter
output readings peaking .... hi

You can experiment with the EDSP on and off for audio checks. I have my menu
4-4 Tx Audio Edsp set to 3. With the EDSP button by the Contour knob off, my
audio is crisper. With it on, I have a fuller sound. To those that have a
good S meter reading on me compared to their noise, some like the Edsp on
during Tx. For those that I am weaker to, of course they like the better
intelligibility of the Edsp off.

Menu 5-9 Tx Edsp Filter 6.0 kHz / 2.0 kHz makes no difference in the AM
mode. I have mine set to 2.4 for use in Ssb though.... at least until the
Fcc says it is ok to run 6 kHz wide transmitted single side band. I have
heard rumors that they might start ticketing those that are running 6 kHz
..... some OO's are now sending warnings to those that they hear operating
this way.

One guy says he limits his MP rf output to 10 watts and feeds an external
linear amp for a couple hundred to four hundred watts.... he sounded great
in AM mode! He also runs the Yaesu Dynamic Microphone MD-100a8x.

Because of the power output and class A audio difference with the MkV, and
its different way of setting filter characteristics, I don't know what the
settings are there.... I would suspect that 50 watts would be the output
setting area, class A audio, and the rest about the same.

For the Field model of the 1000, I would expect the same as the MkV except
back to the 25 watt output level as the MP.

I would be interested in hearing from others that have worked that out for
those two rigs.

73 from Bill - WD8ARZ
wd8arz@ix.netcom.com

----- Original Message -----
From: "E F Todd Benson" <efb@castco.com>
To: <wd8arz@ix.netcom.com>
Sent: Sunday, March 31, 2002 09:53
Subject: please
>

> What are your settings for running the MP, (a fb rig) on Am
>
> Thanks for the heads up
>
> 73,
>
> Todd, W9YK
> Elmhurst, Illinois