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Lazydog Thank you very much for your effort !!!!!!

Tim 09/01/2020
Does what it is supposed to do. Works well on about 9VDC input. Draws only about 100mA. Seems to be fragile, but time will tell how well it holds up. It would be nice to be able to change the RF frequency by something other than 5KHz, but you can always input the frequency (to 100Hz place) from the numerical keypad. Instructions were little help to me. By playing with it found out how it works. Following is my attempt to write instructions for the user: RF Signal Generator 0.5MHz—470MHZ Power supply 8-12 VDC Centre pin positive Not 13.8v, 12v is maximum. F1: Menu (steps through the following) RF Frequency 0.5 to 470 MHz RF Signal Strength -132 to -70dBm Audio Modulation of 0, 1000, 2000, 3000 Hz. (0 is no modulation) CTCSS (Continuous Tone-Coded Squelch System or sub-audible tone) 0.0 TO 999.9 Hz. Maximum frequency actually used seems to be about 280 Hz. Label on screen is CTDC. F2: Erase number entered from numerical keypad. Only works before last digit entered. F3: Turn selection ON/OFF RF Frequency – No effect RF Signal Strength – Turns RF output ON/OFF Audio Modulation – Turns audio modulation ON/OFF CTCSS – Turns CTCSS ON/OFF F4: No function observed. Arrow Keys: RF Frequency – Changes RF Frequency up or down by 5 KHz. Note: You can enter frequency from numerical keypad to 100 Hz, but the second least significant digit (KHz) is the one changed by 5 with each press of the arrow key. RF Signal Strength – Changes RF Signal Strength by 1 dBm Audio Modulation – Sets modulation to 0, 1000, 2000, or 3000 Hz. Zero Hz turns modulation off. CTCSS – Changes CTCSS by 0.1 Hz Number keys RF Frequency – Direct input of RF frequency. You must input leading zeros. RF Signal Strength – Direct input of Signal Strength. You must input leading zero. Audio Modulation – No effect CTCSS – Direct input of CTCSS
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