January 3rd, 2012, 01:11 PM
I am attempting to convert a Nady LT 3 transmitter into a guitar/instrument pak. (freebie) The mic cable is hardwired into the circuit board. So far all I have done is clip off the microphone and solder on a 1/4" plug.
It works, but when the volume is adjusted it makes a lot of noise, it also makes noise when the pickup switch is changed. The guitar volume pot and switch are silent when used with a cord.
I would take some pics but I left my camera somewhere on Christmas day.
I am not very (at all) electronics savey, so if any of you have ideas or suggestions, use small words.
January 3rd, 2012, 08:35 PM
Most, if not all, of those tiny mics on the wireless bodypack transmitters are condensers and require (typically) a 5-volt feed to function. If you have wired in the 1/4" plug w/o taking this into consideration, that could easily explain the noises you are experiencing.
Please understand why this was a free mic, and consider abandoning this path.
January 3rd, 2012, 10:23 PM
Please understand why this was a free mic, and consider abandoning this path.[/QUOTE]
I can accept this as sound advice.
January 5th, 2012, 07:41 AM
Don't feel bad about trying this.
I did the same thing - hey, if it works you've got a cheap wireless guitar systems, if not, its cost you nothing and you get a bit of learning.
I also tried another trick using one of those transmitters that you plug into the headphone jack of your iPod and tune it to your car radio so you can play your iPod through the radio.
I went Guitar -> transmitter-> tuned radio station -> radio plugged into guitar amp
Well, it works as a guitar wireless transmitter, but it sounds cheap and ****ty like it cost $20 (which it did). Maybe a better quality transmitter would be better.
IMHO even the really good wireless transmitters suck tone when compared to a quality lead, so I have given up trying to boogie up my own. I don't play Wembley stadium much these days so I will just cope with a guitar lead. It's fun to muck around with ideas though - thats how stuff gets invented.
January 5th, 2012, 08:33 AM
[QUOTE=donh;3824152]Most, if not all, of those tiny mics on the wireless bodypack transmitters are condensers .....
That got me thinking again, condenser=capacitor?....so I grabbed an old circuit board from who knows what, and harvested a bunch of capacitors.
The first one I tried was a can style about an inch long soldered in series with the 1/4" plug. It killed the bad sounds, sucked some tone, lost some volume, and took about a minute and a half to charge up before it worked:lol: I tried about four more. Some were serious tone killers, one made better tone but didn't take out all the noise. I ended up using an orange disc style about 5/16" diameter. It steals a bit of volume vs a cord, but other wise it isn't too bad (you may disagree).
I probably won't use it live, (unless it proves itself reliable, which I doubt) but it is very freeing for practice.
I don't feel like I really learned much, I have no clue of the value of most of the capacitors I tried, some weren't marked except for a c and number printed on the circuit board.
Thanks donh, whether intentional or not, you pointed me in the right direction.
January 6th, 2012, 07:44 PM
The capacitor AC coupled the line, which blocks the DC phantom that powers the condensor mic. It's exactly what I would have suggested.