Monday, 6 April 2015

GEK HF Amplifier kit

Page update 6/4/2015

10W HF Linear Amplifier Kit





GEK-10PA is a Low cost HF Linear amplifier with RD06HHF1 as driver and RD16HHF1 as push pull

Features & specification:

(GEK- 10PA) (Without low pass filter)

TYPE 1:

Input power 10mW
Output 10Watts
3.8V Dc Operation

DIY Kit ---------Rs1850
Tested Kit -----Rs2100

TYPE 2:

Input power 1Watts
Output 10Watts
13.8V Dc Operation

DIY Kit ---------Rs1550

Tested Kit -----Rs1900

Shipment cost extra
Design and specification subject to change without prior notice


20W HF Linear Amplifier Kit




GEK-20PA is a Low cost HF Linear amplifier with RD06HHF1 as driver and RD16HHF1 as push pull

Features & specification
(GEK- 20PA) (Without low pass filter)

TYPE 1:
Input power 10mW
Output 20Watts
13.8V Dc Operation

DIY Kit ---------Rs1950
Tested Kit -----Rs2300

TYPE 2:
Input power 1Watts
Output 20Watts
13.8V Dc Operation

DIY Kit ---------Rs1600
Tested Kit -----Rs1950


Shipment cost extra
Design and specification subject to change without prior notice


50W HF Linear Amplifier Kit




GEK-50PA is a Low cost HF Linear amplifier with IRF250 Mosfet

Features & specification
(GEK- 50PA)

only 40M band


Input power 3 to 5Watts

Output power  50Watts

13.8V @4A Dc Operation

DIY Kit ---------Rs1100
Tested Kit -----Rs1500


Shipment cost extra
Design and specification subject to change without prior notice


For Lead time and booking contact me by email with your chosen Model.


73,

VU3GEK /KJ6LRR
N.Ganesan
Tamil Nadu,India.
vu3gek@gmail.com


Tuesday, 31 July 2012

LRR200-2 METER FM RECEIVER

 


FEATURES & SPECIFICATION


q  144 to 146 MHz band.
q  Excellent performance, less than 1µV sensitivity.
q  Tuned input, low noise preamp stage.
q  Front Panel Volume, Squelch, and Tuning controls.
q  True Dual-conversion super heterodyne design.
q  1 Watt audio output inbuilt speaker.
q  130mm x100cm x40mm, 600gms.
q  9-12V Power Operation
q  Available as a DIY kit or fully assembled high quality components for reliable operation.
q  Low Cost.

FUNCTIONAL DESCRIPTION
          The LRR200 is a commercial-grade vhf fm receiver available in models for various bands, both in kit form, wired and tested. The LRR200 features a front end with low-noise dual gate Mosfet and double tuned circuits for excellent sensitivity and rejection of out-of-band interference. It has a 4-pole ceramic filter for close channel spacing for repeater operation.

INTEGRATED FM RECEIVER
The MC3362 is a complete FM narrowband receiver from antenna input (pin 24) to audio output (pin13). The low voltage dual conversion design results in low power drain, excellent sensitivity and good image rejection in narrowband voice and data link applications. The first mixer amplifies the signal and converts this RF input to 10.7 MHz. This IF signal is applied to the second internal mixer via pin 19, where the 2nd IF frequency of 455 KHz is achieved by mixing with the 10.245 MHz oscillator. The oscillator circuit is internal to U2; the crystal is Y1, 10.245 MHz .The 455 KHz second IF output (pin 7) requires filtering. We used a precision ceramic 455 KHz filter with 4 poles for a 2nd IF filtering scheme designed to solve the adjacent- frequency swamping effect.
The receiver has good "hysteresis" characteristics, the ability to hold the squelch open once it has been broken by a marginal signal, even if the signal becomes weaker. The squelch is activated by signal strength, not by noise.P2 permits squelch adjustment.

PCB VIEW:










DEMO VIDEO:

http://www.youtube.com/watch?v=yTVi1_kjN-E

 OR
WATCH HERE
video

BOM:
O

S.No
Ref Des
Part No
QTY
RATE
TOTAL
1
U1
7805
1
8
8
2
U2
MC3362
1
90
90
3
U3
LM386
1
8
8
4
Q1
BF960
1
50
50
5
Q2
BC547
1
1
1
6
D1
LED 3mm
1
1
1
7
D2
IN4007
1
0.5
0.5
8
C1,C2
1-10PF
2
10
20
9
C3
3.3PF
1
0.5
0.5
10
C4,C10,C16,C18,C19,C21,C23,C28,C29
0.1µF/104/100N
9
0.6
5.4
11
C5,C9,C13,C17,C20,C22
0.01µF/103/10N
6
0.6
3.6
12
C6,C24,C30
100µF/50V
3
2
6
13
C7
0.001µF/102/1N
1
0.5
0.5
14
C8
10µF/50V
1
2
2
15
C11
100PF
1
0.5
0.5
16
C12
56PF
1
0.5
0.5
17
C14
120PF
1
0.5
0.5
18
C15
6.8PF
1
0.5
0.5
19
C25,C27
1µF/50V
2
1
2
20
C26
22µF/50V
1
2
2
21
P1
10K/POT/LIN
1
10
10
22
P2
100K/POT/LIN
1
10
10
23
P3
10K/POT/LOG
1
10
10
24
R1
1KΩ
1
0.3
0.3
25
R2
47Ω
1
0.3
0.3
26
R3
100Ω
1
0.3
0.3
27
R4,R13
47KΩ
2
0.3
0.6
28
R5
27KΩ
1
0.3
0.3
29
R6
39KΩ
1
0.3
0.3
30
R7,R8,R9
4K7Ω
3
0.3
0.9
31
R10
56KΩ
1
0.3
0.3
32
R11
100KΩ
1
0.3
0.3
33
R12,R14,R15
10KΩ
3
0.3
0.9
34
R16
10Ω
1
0.3
0.3
35
R17
2K2Ω
1
0.3
0.3
36
L1,L2
4T/24SWG/6mm
2
1
2
37
L3
4.7µH
1
2
2
38
L4
100nH - IFT
1
35
35
39
L5
7MCS-8128Z/455Khz
1
25
25
40
Y1
10.245MHz/Crystal
1
20
20
41
FL1
CFU455E Filter
1
35
35
42
FL2
10.7MHz Filter
1
10
10
43
CN1
BNC/MX182
1
40
40
44
CN2
3.5MM/SP JACK
1
10
10
45
CN3
9-12V/DC PIN
1
25
25
46
PCB (Single Side)
95mm x 60mm
1
30
30
47
RMC
2PIN
3
2
6
48
RMC
3PIN
3
3
9
49
IC BASE
24PIN
1
2
2
50
IC BASE
8PIN
1
1
1
51
KNOB
VOL,SQL,TUNE
3
5
23
52
SCREW &NUT

15
1
10
53
LED HOLDER
3mm
1
1
1
54
SPEAKER
8Ω/1W
1
50
50
55
CABINET
130 x 100 x 40mm
1
130
130
56
SHIELD WIRE
150mm
1
1
1
57
J1
Jumper
1
0.4
0.4
                                                                                                                                        Total       Rs695

                                         If you need wide channel spacing add this 10K/10 Turns POT (P1)     Rs150
                                                                                                                              DIY KIT COST    Rs845
                                                                                                                ASSEMBLY & TESTING    Rs50
                                                                                                 TOTAL (FULL ASSEMBLED UNIT)   Rs895



SHIPMENT CHARGE EXTRA / PRICES SUBJECT TO CHANGE

FOR DOUBLE SIDE PCB ADD Rs30

TUNNING CHART:

TUNE
Osc Freq
RF Input Freq
0 TURNS
133.000 Mhz
143.700 Mhz
 1 TURNS
133.260 Mhz
143.960 Mhz
2 TURNS
133.520 Mhz
144.220 Mhz
3 TURNS
133.780 Mhz
144.480 Mhz
4 TURNS
134.040 Mhz
144.740 Mhz
5 TURNS
134.300 Mhz
145.000 Mhz
6 TURNS
134.560 Mhz
145.260 Mhz
7 TURNS
134.820 Mhz
145.520 Mhz
8 TURNS
135.080 Mhz
145.780 Mhz
9 TURNS
135.340 Mhz
146.040 Mhz
10 TURNS
135.600 Mhz
146.300 MHz

The Local oscillator tunes the frequency from 133 to 135.600 MHz to cover the input frequency of 143.700 to 146.300 MHz with a bandwidth of 2.6 MHz.
For example if you need to tune 145.150 MHz you have to turn the tuning knob clockwise direction from the start to 5 turns plus ½ turns.

CIRCUIT DIAGRAM:



CONTACT DETAILS:
N.Ganesan
ganesan4u@hotmail.com
09363105352
Coimbatore
Tamil Nadu
India




 

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