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Posts tagged 1500,

Circuit diagram 75 Meter QRP SSB Transceiver

The 75 Meter QRP SSB Transceiver Theory of Operation 6-30-03 In general, the transceiver switches the 4-element 1500 ohm xtal BPF ends between the inputs and outputs of the two SA602s to reverse the signal flow for R/T operation. Since no IF amplifier is used in the design, 20 dB of additional receiver gain is […]

Low Battery Disconnect

Low Battery Disconnect and Memory Backup Circuit in the ADM666A

Transistors Circuits

Transistors Circuits Transistors Circuits for Guitar Amp 100watt using BD139, MJ11016, MJ11015 Transistors amplifiers R1__________________ 6K8 1W R2,R4_____________       470R 1/4W R3__________________ 2K 1/2W R5,R6_______________ 4K7 1/2W R7________________     220R 1/2W R8__________________ 2K2 1/2W R9_________________     50K 1/2W R10________________      68K 1/4W R11,R12______________   R47 4W C1,C2,C4,C5________         47?F 63V C3________________        100?F 25V C6_________________       33pF 63V C7_______________           1000?F 50V C8_______________          2200?F […]

Simple audio oscillator circuit diagram

Simple audio oscillator circuit diagram using BC559, BC549

Dual LOw Noise Equalizer Amplifier circuit

Dual LOw Noise Equalizer Amplifier circuit using KA2221 Dual LOw Noise Equalizer Amplifier circuit using KA2221

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