[amsat-bb] Re: G-5500 7806 regulator question-update
Mark L. Hammond
n8mh at embarqmail.com
Sat Aug 16 17:56:05 PDT 2008
Okay, thanks to all for the quick suggestions!!
I forgot about the trick of using a diode (or two) on the ground leg of the regulator as a means to increase the regulated voltage. Another good suggesion was to use a LM-317 and adjust it as needed.
Other info: I found inexpensive 7806 devices with LOW shipping (via US Post) at Parts-Express.com, so I should have some arrive here in a few days.
Again, thanks to all for the suggestions and help!
It appears that the 7806 voltage regulator in my Yaesu G-5500 control box has gone bad; the output is measuring more like 10.8 Volts (!). This explains why both position indicators were off by a factor of 2 (e.g., elevation meter showing 90 deg, array pointing 45; azimuth meter showing 180 deg, but array pointing 90 deg., and so on).
Question---has anybody used a 7805 to replace the 7806 regulator in this control box?
I don't have a 7806....so this brings the next question--anybody have a 7806 (or 2) that they want to sell?)
Mark L. Hammond [N8MH]
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