Post by HighMountainRadio on Jan 18, 2018 16:15:06 GMT -6
Greetings To All !
I have compiled this information to assist you in making a decision on whether to make a purchase of this small transmitter. I own one and derive very decent results with it. It incorporates a '2SC1971' Final Output Transistor which is claimed to deliver 5 to 7 watts output. My unit delivers no more than 5 watts but I do not find this to be an issue for a mere $35.00 and FREE shipping from Hong Kong. From my personal technical observations, I believe that the final output transistor can be replaced with a 2SC1972, thus, at least doubling the output power to 10 watts minimum. You may purchase a 2SC1972 transistor for a mere $2.00 !
Specifications:
Bandwidth: 20 MHZ Working Frequency: 87~109 MHz Modulation: FM Maximum Deviation: 75 KHz DC Input Voltage: +9.0 ~ +13.8 VDC Current Draw: <1 Amp Transmit Power 5 ~ 7 Watts Output Impedance: 50 Ohms Step Frequency: .1 MHz Pre-Emphasis Delay: 50 us Resolution: 40 db Distortion: .1% Input Level: -13 dbv Size: 102mm x 65mm x 26mm Default Frequency Range: 87 ~ 109 MHz (Capable of 70 ~ 120 MHz, 20 MHz Bandwidth) - (**Modification MAY be Required)
Images are included for reference. Enjoy, have fun and educate yourself ! 73... Spooky...
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"Knowledge Is Always Made More Valuable By Sharing It With Others !" Always Remember To Be Kind ! True Greatness Often Has Very Humble Beginnings ! Help A Kid Out Today ! *** High Mountain Radio *** "Broadcasting From Somewhere High In The Remote Appalachian Mountains"
