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Any Experience with PRO1k or AMX2000 Tuner?

C

ChiefOperator

After hearing AM on a mod monitor and being reminded (again) of what AM could sound like, I've begun to look for a quality AM wideband tuner. Not surprising, the search has yielded almost nothing.

I did, however, locate this interesting tuner. Does anyone have any experience with it. I would like to add a wideband off-air monitor at one of my stations to replace the Denon in use.

http://www.meduci.com/

Thanks!
 
I have listened to the airchecks posted on the Meduci website, and they DO sound good.
I would not expect it to give very good results in the overloaded conditions at a tx site, as there is probably no
metal shielding in the case, nor any way to limit the RF input with a gain control.
If you want to BUILD a metal case, couple in a coax to a voltage-divider input, I think you'd be very pleased.

The only receivers with which I've had success for an air monitor are old AM auto radios from the 1960's, which are available for $25 on ebay. My favorite is a 1962 Bendix with tubes but no vibrator, it uses 12v on the plates, and feeds to a
solid-state Germanium output.

Why I've never tried >THIS<, I don't know, but I remember at WNWI when it was in Valparaiso, IN, the air monitor was supposedly a simple diode junction at the tower base, fed into an amplifier, which sent the boosted audio back to the studio, and it was as pure as the driven snow. There's nothing else then to dink up the sound, so it ought to be very clean.
IF it's clean to begin with.
 
Okay!


I tapped a 100pf to the antenna output, because I'm such low power, tied that to a germanium diode in parallel with 100 ohms, then took rectified audio right off the diode into the Microphone input of the computer.

Oh my, oh my. Incredibly pure. I needed the 100 ohms to load down the input and to eliminate hum pickup

I will post some audio of this later. Sounds like it's straight off a line monitor but it's the AIR signal!
 
Tom-

Thanks for the earlier post regarding the Meduci tuner.

That sounds very cool! I'd be interested in hearing the audio that you'll post..
 
In my early days as a assistant engineer, we at WATO-1290 used a Fisher TRF AM tuner. That was the best sounding AM I ever heard out of the medium. My preferred tuners in the transistor era for AM are the McIntosh MR 73 and MR 74 tuners. The MR 74 when in top condition sounds comparable to the modulation monitor. So makes a superb air monitor and good DX machine with a good antenna.
 
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