On Mon, 7 Dec 2009 10:28:59 -0800, Robert Spiva wrote: >I have been using a TR-7 line for about two months that sat on a shelf for >quite a number of years. It had been working wonderfully, but this weekend >everything went quiet. To get any receive signal through I have to have the >pass band engaged. When the other two A+B=C filter are engaged I get a very >weak signal coming though. This is the case in all modes AM, RTTY, CW, LSB & >USB. Anyone have any ideas what's wrong?
First idea, dirty/oxidized pins in the Molex connectors between the plugin boards and the parent board. This is probably the most common ailment with aging 7-line radios. The cure can be as simple as pulling all the boards and reseating them, but a good cleaning and sparing application of DeOxit doesn't hurt. When working with the aluminim card cage covers, DON'T overtighten the screws. They can strip easily. They need to be snug, but not lug-nut tight. Also check the various grounding tabs and fingers while you are in there. 73 -Jim -- "It's an Earth food. They are called Swedish meatballs! It's a strange thing, but every sentient race has its own version of these Swedish meatballs! I suspect it's one of those great universal mysteries which will either never be explained, or which would drive you mad if you ever learned the truth!" - G'Kar, Babylon 5 _______________________________________________ Drakelist mailing list [email protected] http://mailman.zerobeat.net/mailman/listinfo/drakelist
