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Post by ducksoupe on May 17, 2014 23:33:40 GMT -5
Does anyone have one. I bought one on EBay for $10. It has fantastic audio and truckers tell me it is loud. I am on it's
stock microphone. I bought 5 vintage radios and they all work great.I do not trust EBay anymore.It would be pushing my luck I just checked the output and it is 10 watts.Really nice sounding too.
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Post by doctor on May 18, 2014 7:26:05 GMT -5
Sounds good but never heard of that brand of radio. Yep ebay you have to be aware of it, lot of junk and rip off artists anymore.
DOCTOR 795
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Post by 2600 on May 19, 2014 16:42:37 GMT -5
Way cool!
Haven't seen one of those in 30-plus years. I would suggest having a look at the final and the two audio transistors. Seems to me they used a plastic screw to hold them down to the heat sink. Might be old enough that they used clear silicone grease on the insulating washers. That stuff migrates away and leaves the component unprotected from overheating. Making sure the plastic screws are tight, and adding a layer of the white heat-conducting compound to each face of the insulating washers might make it last longer. If one of those screws is missing or broken, the replacement will be a metric "M3" thread. Pretty sure the thread pitch is 0.1 mm.
The MPS-U31 final transistor doesn't tolerate high SWR very well. Be nice to it.
Overheated finals, audio transistors and high SWR were the big reasons for those to fail back in the day, along with reverse polarity. If you have a spare 6-Amp diode laying around, soldering it across the power socket's input wires will improve the reverse protection in a big way.
Have fun with it and 73
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