HFU HF Underground
General Category => For Sale / Wanted / Barter => Topic started by: OgreVorbis on August 21, 2019, 2017 UTC
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Hi,
I am in need of an AM broadcast monitor/receiver. It does not necessarily need to be a professional unit you would find in a radio station studio. I just need a high quality AM receiver with flat response up to 10 KHZ. More would be nice, but not necessary.
A real broadcast monitor with % modulation would be nice, but I am only wanting to pay a couple hundred or less.
I am also interested in an AM broadcast processor. I already found something that pretty much fits the bill, but if any of you have any suggestions, I'd be happy to hear them.
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Are you looking for something tunable only, or wideband? As far as monitor are concerned, the analog Belars are OK, (AMM-1, -2, -3), and are good to 30 MHz. The AM wizard was probably the best one they made (AMMA-1), also good to 30 MHz. The Inovonics ones are AM band only, usually only to 1710 KHz, models 520, and 525 were adequate. TFT made some wideband ones as well, but documentation is spotty and with the company gone now, if you need a book, your on your own. Older Harris monitors were cool, I like the AM-90 the best. It had a cool plasma display.
The Belars pop up on ebay from time to time, and at hamfests. Be prepared to do some rework on them.
If you want to go analog processing, CRL's are fairly common. I have two Amigo AM's as backup units to my stereo tool setup. The inovonics processors weren't that bad, although the clippers in them were not filtered, so you can't really push them that hard before they get grungy. The CRL's are the same way. Top shelf is probably the 9100A (B was the stereo version with the right cards), although most of them are over 30 years old and will need some love. They can be a devil to get running again as some of the VCA's you cant get anymore.
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For a couple hundred you can get an HP 8901 Modulation Analyzer on Ebay It has audio output and is good to 1Ghz will do all that you want and more Can set display for peak hold as well. I run the CRL AM 4 Mono system Great System but can get grungy fast especially with low bit rate MP3 If your handy there is a Texar Eagle on Ebay that will do a good job of processing your sound
tAC
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For a couple hundred you can get an HP 8901 Modulation Analyzer on Ebay It has audio output and is good to 1Ghz will do all that you want and more Can set display for peak hold as well. I run the CRL AM 4 Mono system Great System but can get grungy fast especially with low bit rate MP3 If your handy there is a Texar Eagle on Ebay that will do a good job of processing your sound
tAC
Excellent. That's what I'm looking for, thanks!
Those professional broadcast monitors like the Belar and Innovonics are a bit too expensive even when used.
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If anyone's curious, I eventually went with a AMM-SD1: http://www.radioassociates.com/ (http://www.radioassociates.com/)
This site showed up several times after my search queries, but I ignored it because the name "Radio Engineering Associates" sounds like some type of law firm.
It works well and the price is right.