I agree Jim. My TR-7 was over 25 years old, and I pulled the boards, deoxited the pins (and all other connectors), band switch, and all my audio, digital readout, and low receive problems just went away. 73 Mark N5KAE
----- Original Message ---- > From: Jim Shorney <[email protected]> > To: "[email protected]" <[email protected]> > Sent: Mon, December 7, 2009 12:44:31 PM > Subject: Re: [Drakelist] TR-7 filters > > 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 _______________________________________________ Drakelist mailing list [email protected] http://mailman.zerobeat.net/mailman/listinfo/drakelist
