{"id":124,"date":"2015-10-30T01:46:52","date_gmt":"2015-10-30T01:46:52","guid":{"rendered":"https:\/\/zhutarduino.wordpress.com\/?page_id=124"},"modified":"2015-10-30T01:46:52","modified_gmt":"2015-10-30T01:46:52","slug":"simple-ham-radio-mic-preamp-for-a-ht","status":"publish","type":"page","link":"https:\/\/thezhut.com\/?page_id=124","title":{"rendered":"simple ham radio mic preamp for a HT"},"content":{"rendered":"\n\n\n
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This is a very easy project.<\/p>\n

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Below is the basic plans for the pre amp, I tried several transistors and found the mps2222a worked the best for my application.\u00a0 If you don’t have a mps2222a dont worry some of the others i tried were a mps3904 and a 2n4401, they both worked but the mps2222a had the best gain for my use (try any NPN transistors you have one of them should do the trick). Also i used a 12 volt to 9 volt converter but if you don’t have one a standard 9 volt battery will work fine.\u00a0 The pre amp will work on a voltage of 6 to 9 volts, do not use 12 volts it will fry it!!!<\/p>\n

For the project box I disassembled a old external floppy drive, just about any thing you can find will work..<\/p>\n

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