[AMRadio] Mic recommendation for rig


sbjohnston at aol.com sbjohnston at aol.com
Tue Sep 22 01:11:23 EDT 2009


OK, Bob - I see you're a "nut" like me -grin- so I should describe my 
current set up for 160m AM.

Right now my Gates BC1T has a Sennheiser 421 dynamic cardioid mic (set 
one click off "M"), feeding a Berhinger VX200 mic processor.  Then it 
goes thru a fairly noisy Logitek rack mixer to an equalizer to let me 
roll the highs off to avoid being too wide,  That in turn feeds a 
4-band Texar Audio Prism, then a hot-rodded 3-band Dorrough DAP-310 
with the second generation AM limiter card.  The processors are all 
running pretty gently.

There's picture of the audio rack on my website at the bottom of the 
page related to the Gates transmitter:
http://www.wd8das.net/gates.html


Steve WD8DAS

sbjohnston at aol.com
http://www.wd8das.net/
---------------------------------------------------------
Radio is your best entertainment value.
---------------------------------------------------------


-----Original Message-----
From: Bob Peters <rwpeters at swbell.net>
To: 'Discussion of AM Radio in the Amateur Service' 
<amradio at mailman.qth.net>
Sent: Mon, Sep 21, 2009 7:51 pm
Subject: Re: [AMRadio] Mic recommendation for rig










Steve I use a UREI  BL-40 Modulimiter...and it has
A symmetric as well I have a CBS Labs
Limiter...and getting the CBS labs AGC as well as
a pair...

Bob W1PE

-----Original Message-----
From: amradio-bounces at mailman.qth.net
[mailto:amradio-bounces at mailman.qth.net] On Behalf
Of sbjohnston at aol.com
Sent: Monday, September 21, 2009 6:42 PM
To: amradio at mailman.qth.net
Subject: Re: [AMRadio] Mic recomendation for rig

The most important single accessory item to have
in your AM shack is a
way to monitor modulation - a cheap o'scope is a
good choice. Keep an
eye on it to ensure you have reasonably strong
average modulation
levels, and negative peaks that don't go all the
way to 100% and pinch
off the carrier.

You current quest for a good mic is already
underway.  The next item I
would want is a compressor-limiter. This device
allows you to wander a
bit from the microphone, or get excited speaking
loudly, without under
or overmodulating. You can get a "microphone
processor" which combines
a mic preamp with equalizer, compressor, limiter,
de-esser, and such.
I'm fond of the Berhinger ULTRAVOICE VX2000 for
that job. They go for
maybe $70 on eBay.

I sometimes run more elaborate AM broadcast
processors on my rigs,
too... but that's because I'm a nut. The Berhinger
ULTRAVOICE VX2000
alone does a great job for ham AM work.

On the other hand, on my Apache I use a plain D104
driving the musical
instrument (High-Z) input of a DBX 163X
compressor-limiter - sounds
great and very simple. They usually go for $80 on
eBay

Steve WD8DAS

sbjohnston at aol.com
http://www.wd8das.net/
--------------------------------------------------
-------
Radio is your best entertainment value.
--------------------------------------------------
-------

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