I hope you find this information as valuable as I have. If you have a scrap mic you might rig something up. For extra filtering protection, also connect a. That's what causes a squeal or loud buzzing through the speaker in the receive mode. The one listed above will work fine.
See the previous discussion to determine this. Touch the other Ohmmeter test probe to all the mike socket pins. Start by jumpering any two mike socket pins together and see what happens. And is also more expensive. If one of the colored wires is obviously covered by the shielded braid, it's the Mike or audio line. Youll need a real antenna or a Dummy Load, a clip-lead or a piece of bare wire, and possibly an Ohmmeter.
Be able to neatly solder and insulate those wires on the corresponding pins of the new plug. The best way to determine the color code of a mic is to use and Ohm meter. Finally check the remaining wire for continuity to the shield while the mic is keyed. Contact us by email: click. Then do the same to the opposite end. Next I'll cover the defective mic. So far received 179 votes for a total score of 5.
Start touching the other end of the wire or clip-lead to the remaining pins briefly and watch what happens. Of couse any other ideas you may have or fixes would be very welcome. There are many things that can go wrong with a mic. The wire that reads continuity again is your common wire usually black or blue is common. The word common as were using it means the same thing as Ground or shield wire. Step 3: Strip back that common color and twist it together with the shield, making this a single wire.
I've seen mics from the manufacturer use the white or red wire for the audio connection while the blue wire was shielded. Step 1: With the mic un-keyed, meter between 2 wires at a time on the three remaining wires until you get continuity note which wires read zero ohms. In other words, this is the Ground. Youve reduced the four wires down to three and saved the hassle of having to open up the mike and rewire the switch itself. The best way to determine the color code of a mic is to use and Ohm meter. If it reads zero Ohms this is your transmit wire, you're all done.
How To Cure The Squeal Refer to Figure 3. If you have a radio that has an electret condenser mic, the best replacement is a good quality power mic such as an Astatic D104, D106M6 or a 575M6. On a 5 wire mic: Confirm the audio leads as in the 4 wire instructions. Older power mic like the Turner +2, the old Cobra dynamics, old Radio Shack desk mic, and others didn't switch the preamp out of the audio path. On a power mike with the battery installed, the resistance may vary anywhere from a few ohms to several thousand ohms, depending on the setting of its gain control. You never said you needed to know how the mic cord is wired to the mic itself. That being the case I believe my advice to be ok.
The mic test box or the radio with a monitor radio nearby would be the best. Another type of mic is the non-amplified crystal or ceramic type. Generally it's not worth the trouble. If the mike brand you want to wire isnt shown youll have to figure out the color code yourself, which is very easy to do using an Ohmmeter. Have you ever had trouble with wiring a stock mic? The only way to fix this problem is to put another set of contacts in to switch the audio lead. They are usually the cheapest cartridge the manufacturer can get their hands on and the sound quality is usually muffled.
Most common is a break in the coiled mic cord. Have you ever had trouble with wiring a stock mic? The main category is Microphone wiring that is about Links to Microphone wiring diagrams. You said you were trying to wire the desk mic so it would work with a Cobra 200. If you can still hear something, its relay switched. By the way when looking inside the radio, you can just as easily find the common or Ground by noting which pin the shield of that audio cable is attached to. Many older and new inexpensive radios don't switch the radio mic amp off. Power mics with Hi-Z cartridges have a preamp that will match both types of radios.