高性能便携式十米机DIY项目 [复制链接]

建议全模式.
金属外壳,做成小台式qrp机器.

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frequency range:
rx: 26.000 - 31.975 mhz (f3e)
tx: 10m amateur bands (f3e)
channel steps: 5/6.25/10/12.5/25/50/100 khz
emission type: f3e
antenna impedance: 50 ohms
frequency stability: ±3ppm -20℃ ~+60℃
operating temperature range: -20℃ ~ +60℃
audio frequency response: 300 to 3,000hz
occupied bandwidth: ≤ 16khz
supply voltage: nominal: 8.4 v dc, negative ground
operating: 6 ~ 9 v, negative ground
current consumption:
rx: 0.2 a (receive)
tx: 0.3a/0.5a/1.0a/1.5a @ 0.5w/1w/3w/5w
case size (w x h x d): 68 x 150 x 38 mm (w/o knobs & connectors)
weight (approx.): 0.35 kg)
transmitter
rf power output: 0.5w/1w/3w/5w
modulation type: variable reactance
spurious radiation: at least 60 db below
maximum distortion: ≤5%
maximum frequency deviation: ≤±4.5khz
microphone impedance: 2 k ohms
receiver
circuit type: fm double-conversion super heterodyne
intermediate frequencies: fm 1st: 45 mhz, 2nd: 450 khz
sensitivity: 0.15uv typ for 12 db sinad
squelch sensitivity: better than 0.12 uv (amateur band)
selectivity : ≥65db
spurious response rejection: ≥60db
af output: 0.5 w @ 4 ohm for 10 % thd (@ 8.4 v)
af output impedance: 4-16 ohms