turner plus three b mic,capacitor trial.

[@Sky1]

Turner +3b always sounded a bit sharp and tinny. That is why they came out with a SuperSIdekick which sounds great on SSB but muddy on AM.

[@kkristopher7413]

Good tutorial. If you want to sound different and even better, experiment with capacitors and their audio properties. You will make an average mic into a great mic.

[@eddiewalker4530]

I just bought a midland desk mic that look just like this turner. The board looks the same to. When I connect to a radio there’s no sound unless I key the mic the I can hear the radio but a very reduced volume. Any ideas about what I might could do?

[@luminositystudios979]

Could you please give the colors to pin connections on a stock 6 wire Turner Plus Three B to a Kenwood TS450S 8 pin plug?

[@transcanada9028]

I can't see why anyone would want their +3 to sound like a D-104

[@421CentralIowa]

I just got this same mic from ebay a couple days ago. And not being able to leave anything alone, I replaced all of the capacitors on the board with new ones. I replaced all the electrolytics with Nichicon bipolars and replaced the tantalums with .47 no-name polypropylenes (that barely fit in the void.) The result to me sounds pretty much the same as it did before, honestly. I compared it to a stock D104 from 1977 in this video if you're interested:

[@kenwilliams563]

I really don't see the point in struggling to replace a 5 mfd capacitor with anything other than a 4.7 mfd, the location in the circuit just does not make the value that critical ?

[@arconeagain]

I have a fair bit to say on this. For one, I would never take a single on air report as gospel, I don't care who it is, I don't care if it's George Martin. Secondly, an audio test combined with just one radio? I mean, you do one audio check with one, basically unknown person with an unknown receive/filtering/audio settings/speaker response/ear/possible hearing aid? Then you start rummaging through the mic. You say you're an audio guy, but coupling capacitors are unlikely to affect the tone to that degree, short of failure. If it were an emitter bypass cap, different story. My first and logical thought was input impedance. For good response/transfer, you want the audio input impedance of the radio to be between 5 and 10 times the impedance of that power mic, as a rule of thumb. Most don't know this. So always test with another radio, especially that being some modern crap. Last, the value of 5uF, isn't 4.7 close enough for you? Especially considering the typical value tolerance for an electrolytic capacitor is 20%. I'm sorry, but you have a lot to learn.