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Radio Crystal With One Transistor 2SB178


This Circuit is simple with One NPN Transistor 2SB178, Signal
 selected from LC circuit and pick up with Germanium
 Diode IN34A or IN60 or OA70 and Amplified with Transistor 2SB178 and with Earphone or Headphone with Resistant about 8-2000 Ohm.

The component list

COMPONENT '60 Turns' = L
COMPONENT '500 pF' = CV
COMPONENT 'IN34A/IN60/OA70' = D
COMPONENT '10 nF' = C
COMPONENT '5K6' = R
COMPONENT '2SB178' = TN
COMPONENT '4K7' = R
COMPONENT 'Earphone 8 - 2000 Ohm' = SPKR
COMPONENT '100uF' = CE
COMPONENT 'SWITCH' = SWITCH
COMPONENT '1.5V' = BATTERY
COMPONENT '' = GND
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5 comments:

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  5. AnonymousNovember 25, 2015 at 1:15 PM

    If you already have cable or satellite service there are still some good reasons to buy an antenna anyways. First, a TV signal that is picked up over the air is optimal, meaning it hasn't been compressed, outdoor antenna

    ReplyDelete

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