2m 144 mhz 146mhz receiver

2m 144MHZ
146MHZ RECEIVER
4S6GGS
Her I am use MC3357 / LA1186 in this 2m Receiver This
experiment was done when I was a SWL lesson
145.625MHz Repeater / 145.650MHz Repeater 59 Signal
Repot With my Home brew ground plan Antenna 10 feet
height Excellent Sensitivity without preamp . Local osc are
very stable when I on Rx 2min in drift +- 50khz and get very
stable in 24 hrs

www.4s5gs.gayan@gmail.com

2m 144MHZ - 146MHZ RECEIVER
Her I am use MC3357 / LA1186 in this 2m Receiver

This experiment was done when I was a SWL lesson 145.625MHz Repeater / 145.650MHz Repeater 59
Signal Repot With my Home brew ground plan Antenna 10 feet height Excellent Sensitivity without
preamp . Local osc are very stable when I on Rx 2min in drift +- 50 kHz and get very stable in 24 hrs.

This Receiver good perform for SWL / Ham operators / Monitor 2m band.

MC3357 DESCRIPTION

Includes Oscillator, Mixer, Limiting Amplifier,
Quadrature Discriminator,
Active Filter, Squelch, Scan Control, and Mute
Switch.
• Excellent Sensitivity: Input Limiting Voltage –
(– 3.0 dB) = 5.0 mV (Typical)
• Low Number of External Parts
Required

LA1186 Features and Functions

• Contains RF amplifier, MIX, OSC, AFC diode.

• Operating voltage: 1.8 to 8.0V.
• Improvement in cross modulation characteristic
due to the use of double-balanced MIX.
• Improvement in strong input characteristic.
• Less spurious radiation from local OSC.
• TV (1 to 12 channel) receive capability.

4S6GGS Email . 4s5gs.gayan@gmail.com http://4s6ggs.blogspot.com


2m RECEIVER SCHEMATIC DIAGRAM


Part list

Part Value R1 10 Part Value
D1 1N4004 R2 1k CX1 0.1uF
D2 1N4148 R3 22k CX2 0.1uF
D3 1N4148 R4 10k CX4 0.001uF
D4 1N4148 R5 2.2k CX5 0.1uF
D5 1N4148 R6 220k CX6 0.01uF ***
D6 1N4148 R7 10k CX7 0.22uF
IC1 LM386N R8 10k CX8 0.68uF
IC2 MC3357 R9 1.5k CX9 470pF
IC3 LA1186 R12 100k CX10 470pF
IC4 LM7805 R13 1k CX11 0.1uF
IC5 LM7805 R14 33k CX12 22pF
L1 1mH *** R15 47k CX13 0.1uF
L2 20SWG 3T Dia 7.5 mm R16 2k CX14 20pF
L3 20SWG 3T Dia 7.5 mm R17 2k CX15 10pF
LED1 R18 22 CX16 0.1uF
Q1 10.245MHz crystal R19 22 CX17 0.1uF
QF2 10.7MHz Filter R20 100k CX18 120pF
SP1 8R 1W Sony Sp R21 150k CX19 50pF
T1 BC547 R22 2.2k CX20 5pF
T2 BC547 VR1 10k CX21 5pF
T3 BC547 VR2 47k CX22 0.001uF
TR1 455KHz IF IFT VR3 20k CX23 0.001uF
TR2 10.7MHz IF IFT VR4 10k CX24 5pF
CX26 30pF
CX27 0.001uF
C1 100uF CX28 30pF
C2 220uF CX29 0.001uF
C3 10uF CX30 100pF
C4 20pF CX31 0.001uF
C5 1uF CX32 0.01uF
C6 0.47uF CX33 0.001uF
C7 10uF CX34 0.001uF
C8 220uF CX35 0.1uF
C9 20pF
C10 10uF



PCB side Size . H50.8mm / 103.33mm



Component side Size . H50.8mm / 103.33mm



10.7MHz Filter Preamp Board

Part list

C1 10n R3 *
C2 10n R4 1k
C3 10n R5 100
C4 4.7n R6 10k
C5 10n R7 47k
QF1 10M7 T1 C1923
R1 680
R2



Part list
Assembly variant:
Part Value
C1 10n R1 56
C3 10n R2 470
C4 10n R5 470
C5 10n R6 220k
QF1 10M7 T1 C1923



10.7MHz P.PA Board PCB

H24.08mm / W 19.17mm

VCC LA MC GND



This Receiver good perform for SWL / Ham operators / Monitor 2m
band. Very stable LOCAL VCO.

First on the Rx Normal power on LED light up half (the power indicator )
then Tune the our Repeater 145.625MHz in lesion the signal wait for
1-5min fine tune the Rx then ok now can use contuses 24hour
…………….Try it and sent me a Photo and result via E mail



Normal power on LED light up half / the power indicator

145.625 - 600 Repeater Signal Receive LED light up full. S meter run


2m 144 mhz 146mhz receiver

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2m 144 mhz 146mhz receiver