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Chinese desk microphone

2/7/2012

2 Comments

 
I usually use either a fist microphone or a headset when on the air, but my recent experiences at GB2GP have shown me that a desk microphone is useful when operating a special event station as it is easier for visitors to use on the air.

GB2GP has two radios that don’t have microphones at the moment so I looked into building a couple of electret gooseneck desk mics from the ARRL handbook. Once I had costed up some parts that weren’t in my junk box this project felt too expensive until I saw PC desk mics on ebay for only £2 each. At that price I bought a couple and they arrived this morning. The external quality looked just fine - so far so good

Picture
Like any good radio amateur, the first thing I did was take one apart to see how I could add a PTT. As expected the quality inside was only worth £2, but the thing that really surprised me was the bag of grit that had been inserted to add weight to the base!

Picture
I guess it works, so why not stick with it, but I will be sealing the bag as I spilt half the contents on the floor when I tried to take it out of the microphone!

Next job is to change the flex to some 4 core and add an 8 pin microphone so they can be used with the TS-711 and TS-690S at GB2GP which shouldn’t take long.
2 Comments
Mark Rodgers link
11/14/2012 12:35:22 pm

I bought the same microphone to use on my radio. I found small rocks inside mine, wrapped in paper. I haven't wired it to the radio yet. I need to find a small PTT button that will fit.
73 DE KC8GRQ

Reply
Steve
11/15/2012 01:45:46 am

Good stuff Mark. mine work just fine and we made many QSOs during JOTA this year.

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