VINTAGE BELAR ELECTRONICS AM MODULATION MONITOR AMM-1

  • Sold for: Start FREE Trial! or Sign In to see what it's worth.
  • Item Category: Tools
  • Source: eBay
  • Sold Date: Mar 28,2011
  • Channel: Online Auction

VINTAGE BELAR ELECTRONICS AM MODULATION MONITOR AMM-1

This is a vintage used Belar Electronics Laboratory, Inc. AMM-1 AM Modulation Monitor. The power cord is missing so I have not powered it up. Power cord connection to unit is a bit different design. I tested the meters and all three deflect when tested for resistance; Modulation meter has 1170 ohms resistance, % Carrier meter has 120 ohms resistance (dial cover has crack in middle), and HZ Deviation has 130 ohms resistance.

It was in a large amount of equipment from a working AM radio station that closed down recently when it was purchased and converted to FM. I acquired the equipment and will be selling in the next few months, so be sure to bookmark in Favorite Sellers.

I have no manual and no way to drive it with a signal, so no further testing was done. Belar is still in business and they have manuals for models with similar features, perhaps they can make a manual for this available. The Belar web site is at /

A visual inspection shows that it is pretty complicated, but I see no obvious damage. It may have been in use when the station was shut down, as the only other monitors were early Gates units (those are already sold). Not sure what the value might be, so feel free to make an offer.

US only, no International sales. It weighs 14 lbs, is rack mount, 19"W x 5"T x 11"D. Sold as-is, but check feedback about other items I sold recently, and of course check overall feedback. However, if there is a problem please contact me before leaving neutral or negative feedback so we can try to resolve it satisfactorily. Please check out the other items listed this week.

Winning bidders must contact me within 5 days of auction end, or item is subject to relisting, or it may be offered to the next highest bidder. Payment is due within 10 days of close of auction and PayPal is required.

I reserve the right to reject bids from those with negative feedback. If you have negative feedback within the last 6 months for non-payment, or use hidden feedback, don't bid, as your bid will be canceled. If you are new to eBay and have zero feedback you must contact me before bidding or I will cancel your bid, and block you from bidding on any of my auctions.

Please see my other auctions. Please ask questions before bidding. Check my feedback if you have any concerns.

Items in the Worthopedia are obtained exclusively from licensors and partners solely for our members’ research needs.

Relevant Articles