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pm3 [2007/02/24 21:02] n5na |
pm3 [2007/02/24 21:07] n5na |
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===== Description ===== | ===== Description ===== | ||
- | The Power-Mite 3 has four circuit boards with VFO transmit and receive on 40 and 20 meters. | + | The Power-Mite 3 has four circuit boards with VFO transmit and receive on 40 and 20 meters and sidetone. |
The receiver is comprised of a variable oscillator operating on the received frequency, a mixer and high gain audio amplifier. The received signal is converted directly to audio where a filter eliminates undesirable signals, and then amplified to headphone level by a high gain audio amplifier. The variable oscillator covers 7.0 to 7.3 MHz for 40 meter operation and is doubled to 14.0 to 14.6 MHz to cover 20 meters. | The receiver is comprised of a variable oscillator operating on the received frequency, a mixer and high gain audio amplifier. The received signal is converted directly to audio where a filter eliminates undesirable signals, and then amplified to headphone level by a high gain audio amplifier. The variable oscillator covers 7.0 to 7.3 MHz for 40 meter operation and is doubled to 14.0 to 14.6 MHz to cover 20 meters. | ||
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***Finish:** Baked enamel with Cycolac sidepanels and wood grain inserts | ***Finish:** Baked enamel with Cycolac sidepanels and wood grain inserts | ||
***Power:** 12 Volts 30 ma. on receive, 480 ma. on transmit | ***Power:** 12 Volts 30 ma. on receive, 480 ma. on transmit | ||
- | ***Semiconductor devices:** 1 Dual gate MOSFET, 1 Integrated circuit, 8 Silicon transistors (10 in PM3A) | + | ***Semiconductor devices:** 1 Dual gate MOSFET, 1 Integrated circuit, 8 Silicon transistors |
***Types of reception:** CW - SSB – AM | ***Types of reception:** CW - SSB – AM | ||
***Sensitivity:** Less than one microvolt provides readable signal | ***Sensitivity:** Less than one microvolt provides readable signal |