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CIRCUIT RESEARCH LABS CRL units or OPTIMOD 9100B




 
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Author Topic: CIRCUIT RESEARCH LABS CRL units or OPTIMOD 9100B  (Read 832 times)
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KD0HUX
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« on: September 26, 2022, 04:11:37 PM »

Hello AM crew I want to know which is the best for AM ham radio. I know  Orban owns Circuit Research Labs now.What would you choose and why?
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WBear2GCR
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« Reply #1 on: September 26, 2022, 04:17:23 PM »

Yes.

 Roll Eyes
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Pete, WA2CWA
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« Reply #2 on: September 26, 2022, 06:21:18 PM »

Why do you think you need either one?

What microphone and rig would it be mated with?
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Pete, WA2CWA - "A Cluttered Desk is a Sign of Genius"
KD0HUX
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« Reply #3 on: September 27, 2022, 05:51:07 AM »

Why do you think you need either one?

What microphone and rig would it be mated with?
Mic Locker Audio Technica 3060   AKG c4500b-bc       Home brew transmitter
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N1BCG
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« Reply #4 on: September 30, 2022, 12:04:12 PM »

Audio processing for broadcasting is designed to address issues that don't exist in amateur radio and you pay dearly for them. However, having a good peak limiter is critical and allows you to use pretty much anything you want before it.

If you want to go with CRL, their PMC-300 and PMC-450 series limiters are both excellent as is the very popular Inovonics 222. Interestingly, I've found that the "Peak Stop" limiter (clipper) in the DBX 166XL is very effective in wrangling in loudness-killing peaks. The Symetrix 565E also has a decent limiter so there are a few options available.
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KD6VXI
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« Reply #5 on: September 30, 2022, 06:41:28 PM »

To be honest, if you have a good enough transmitter, you won't go wrong with the Optimod-HF.  It was designed to get speech into the iron curtain and other areas.

Good luck finding one.  And the few that show up for sale, they ain't cheap, usually.

Supposedly one of the (prior) Omnia engineers has his own software now.  Breakaway Broadcast Processor.  If you have a DC coupled soundcard it's capable of asymmetrical output as well.  I've used it, it works well.  It does introduce delay because it uses the PC and sound card(s) to process the audio.  The Omnia processors weren't as aggressive in the processing, in my opinion.  One of the less is more things.

For casual AM operation, the D104 with an xmitter that has 5 to 10 megohm input impedance is hard to beat, honestly.

--Shane
WP2ASS / ex KD6VXI
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