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Gates M-4990 frequency monitor, McMartin TN-77CB FM SCA rcvr
I was assisting an engineer friend in cleaning out an old radio station building and came across a Gates M-4990 frequency monitor. I'm not sure of its date of manufacture or how long it has been out of service. All but one of the tubes light up when power is applied. I do not have any test equipment on hand to further verify its functionality. The unit came from a station which operated on 930 khz. I am working on getting some photos of the unit and will gladly share them with anyone who responds. Ebay will be my next stop, but I would like some idea where to start with a minimum bid. This expedition also yielded two McMartin TN-77CB FM SCA recievers. These were used by the FM side of the same station and were placed in businesses who subscribed to the station's Muzak subcarrier. I'm guessing these are early 1960s vintage. Again, I do not have the test equipment to further verify their functionality, but these items did not shoot sparks when I powered them up, so I guess that's a start. The FM subcarrier signal came from a station which operated on 93.3 mhz. Any input on these items would be appreciated. I tried a Google search on both items but got no responses. G.T. Tyson |
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"G.T. Tyson" wrote:
I was assisting an engineer friend in cleaning out an old radio station building and came across a Gates M-4990 frequency monitor. I'm not sure of its date of manufacture or how long it has been out of service. All but one of the tubes light up when power is applied. I do not have any test equipment on hand to further verify its functionality. The unit came from a station which operated on 930 khz. I am working on getting some photos of the unit and will gladly share them with anyone who responds. Ebay will be my next stop, but I would like some idea where to start with a minimum bid. This expedition also yielded two McMartin TN-77CB FM SCA recievers. These were used by the FM side of the same station and were placed in businesses who subscribed to the station's Muzak subcarrier. I'm guessing these are early 1960s vintage. Again, I do not have the test equipment to further verify their functionality, but these items did not shoot sparks when I powered them up, so I guess that's a start. The FM subcarrier signal came from a station which operated on 93.3 mhz. Any input on these items would be appreciated. I tried a Google search on both items but got no responses. G.T. Tyson Do you want to sell them on E-bay? Then set the minimum bid at $.01. If anyone wants it, they will set the price. if you set a high minimum or reserve you will probably not sell any of it. None of it is used by stations anymore, so the market will be collectors, not engineers. -- Former professional electron wrangler. Michael A. Terrell Central Florida |
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