I know I've told you guys that I'm not the sharpest tool in the shed, and today was another one of those days when I proved it......
I got a used MFJ-949C antenna tuner that did not come with a 12 VDC cable and plug to power the SWR/Power meter light. So I look into what it takes to light up this meter, and order a wall wart power supply from HRO.
It shows up in two days, I open up the package, go to plug it in, and realize it has the wrong type of plug. Evidently the wall wart I got is for the later models, and not the older "C" model which takes a 2.5mm phone plug.
I go to the local Rat Shack and buy a pack of two 2.5mm phone plugs, and melt the first one trying to solder the wires to it. Then being careful not to repeat that mistake, I proceed to melt the second plug trying to solder the wires to it......(typical cheap Rat Shack junk).....:glare:
So now I get to thinking....(and this is where things usually turn to shit)....I open up the tuner, remove the 12 VDC plug socket, run the wires from the wall wart straight into the back of the cabinet through the plug socket hole, and wire the power supply direct to the meter. I then put the cabinet back together, attach the ground and coax, fire the radio up, and......THE METER NO LONGER WORKS....:headbang
I take everything back off, open the cabinet, check all my connections and make sure I didn't pull any wires off, everything looks right but I notice the meter is a little loose, so I break out the hot melt glue gun, and weld it back into place. Button up, re-attach, fire up the radio, and......IT STILL DOESN'T WORK.......:headbang
Now I'm scratching my head wondering what I could possibly have done to render the meter inoperable, looking at new Vectronics tuners on the internet, and kicking myself in the ass all at the same time......
Then the light bulb in my head finally flickers to life, and it occurred to me that by removing the plug socket from the cabinet, and wiring the power supply direct, I removed the ground to the meter.....
Back into the cabinet I go, attach a pigtail ground wire to the negative line, and attach it to the cabinet, button everything up, attach all my leads, turn on the radio...again....and presto....the meter once again functions......
I need an aspirin now......
I got a used MFJ-949C antenna tuner that did not come with a 12 VDC cable and plug to power the SWR/Power meter light. So I look into what it takes to light up this meter, and order a wall wart power supply from HRO.
It shows up in two days, I open up the package, go to plug it in, and realize it has the wrong type of plug. Evidently the wall wart I got is for the later models, and not the older "C" model which takes a 2.5mm phone plug.
I go to the local Rat Shack and buy a pack of two 2.5mm phone plugs, and melt the first one trying to solder the wires to it. Then being careful not to repeat that mistake, I proceed to melt the second plug trying to solder the wires to it......(typical cheap Rat Shack junk).....:glare:
So now I get to thinking....(and this is where things usually turn to shit)....I open up the tuner, remove the 12 VDC plug socket, run the wires from the wall wart straight into the back of the cabinet through the plug socket hole, and wire the power supply direct to the meter. I then put the cabinet back together, attach the ground and coax, fire the radio up, and......THE METER NO LONGER WORKS....:headbang
I take everything back off, open the cabinet, check all my connections and make sure I didn't pull any wires off, everything looks right but I notice the meter is a little loose, so I break out the hot melt glue gun, and weld it back into place. Button up, re-attach, fire up the radio, and......IT STILL DOESN'T WORK.......:headbang
Now I'm scratching my head wondering what I could possibly have done to render the meter inoperable, looking at new Vectronics tuners on the internet, and kicking myself in the ass all at the same time......
Then the light bulb in my head finally flickers to life, and it occurred to me that by removing the plug socket from the cabinet, and wiring the power supply direct, I removed the ground to the meter.....
Back into the cabinet I go, attach a pigtail ground wire to the negative line, and attach it to the cabinet, button everything up, attach all my leads, turn on the radio...again....and presto....the meter once again functions......
I need an aspirin now......