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Inovonics 222--help!

R

rickradio

Guest
I have one, but still trying to figure out how to adjust it. I'm using it to feed a Range Master.

Just what are these things designed to do and not do? Yes, they're AM broadcast processors, but don't have compression or limiting. I'm not an engineer, and the manual is hard for me to follow. I also don't have a modulation monitor. Do I need one to adjust this thing correctly?

Thanks for any and all help...
 
Did you check the Rangemaster web site? I believe Keith has a section on how to use the 222 since he recommends it as being a low cost, high performance audio processor. I think his instructions also include a basic "how-to" in case you don't have access to a modulation monitor.

To answer your query about what are these things designed to do, the following is from the Inovonics web site:

"The 222 was originally developed as a "post-processor" to ensure US broadcasters' compliance with FCC-mandated occupied-bandwidth regulations. It incorporates a fast, asymmetrical peak limiter, independent pre-emphasis-protection limiting, and a very sharp-cutoff low-pass filter with proprietary overshoot control."

"... Though the 222 is intended to provide basic final limiting, a "floating platform" release characteristic yields sufficient program dynamics compression that often the unit can be run "barefoot" between the console and transmitter with good results."
 
I boughtmy Rangemaster 2 uears ago as a project fraid to say and it sat until 2 weeks ago.

With no ground and the whip inside being fed by a DAP 310 it goes farther than I expected. I can't wait to elevate the whip to the roof and provide a ground.

Unjappy I can't replace the broken meter bezels.

The tuning isn't right because of the ground. The whip is laying on the floor. I can easily hear it two miles.

I looked at the SStran and others. Bought the rangemaster because it is certified part 15. What range are you getting??
 
I'd look around on ebay, as DAP 310s do come and go on occasion. I love the Dorrough stuff and placed a 310 in my high school's tv studio many years ago. Unfortunately the former school-based A/V technician must have disposed of it without telling anybody (I was not too thrilled to find that out).

You might want to give Dorrough a call and speak to Mike wife, Kay, who is handling day to day business there. Perhaps she might be able to find you some bezels off a donor unit or something?
 
What range are you getting on part 15 AM stations? Are they elevated antennas (building top?) and are you using just a "ground" or extra ground radials?
 
The two I'm working on are still in the construction phase. I'm also going to do a side-by-side comparison with the Procaster which will appear on my Part 15 site when published.

One station is going to have the transmitter mounted on an tall pole mount with the pole sunk into the ground. The other will have the antenna on top of a second story of a school campus building so it will be interesting to see the difference between the two, performance wise.
 
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