4-18Mhz-converter


Posted on Mar 19, 2013

The unit consists of rlamplifier Q1, local oscillatorQ2, and mixer Q3. The two bands are covered without a bandswitch by using an i-f or 3.5 MHz. The oscillator range is 7.5 to 14.5 MHz. Incoming signals from 4 to 11 MHz are mixed with the oscillator to produce the 3.5-MHz i-f. Signals from 11 to 18 MHz are mixed with the oscillator to also produce an i-f of 3.5 MHz. At any one oscillator frequency, the two incoming signals are 7 MHz apart.


4-18Mhz-converter
Click here to download the full size of the above Circuit.

Rf amplifier input Cl/L1 comprises a high-Q, lightly loaded, tuned circuit; this is essential for good band separation.




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

Guarded input picoammeter circuit
Relay Selector Pushbutton circuit and explanation
LM317HV variable high current variable power supply
servo motor control through keypad
16F54 fickle!
FM Bug Transmitter Mint Box Circuit
Bathroom automatic hand dryer circuit
Class push-pull tube power amplifier circuit diagram 2A3A



Top