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13cm FM ATV Platinum Receiver

The document provides a circuit diagram for a tuner that operates between 2200-2710 MHz and 2304-2559 MHz. It includes components such as inductors, capacitors, resistors, and transistors that form the tuner circuit. The tuner has an AF output voltage range of 90-210 mVrms for a 22.5 kHz deviation and 500 mV for a 75 kHz deviation. It also has an output impedance of 1.3k ohms.

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K. RAJA SEKAR
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408 views1 page

13cm FM ATV Platinum Receiver

The document provides a circuit diagram for a tuner that operates between 2200-2710 MHz and 2304-2559 MHz. It includes components such as inductors, capacitors, resistors, and transistors that form the tuner circuit. The tuner has an AF output voltage range of 90-210 mVrms for a 22.5 kHz deviation and 500 mV for a 75 kHz deviation. It also has an output impedance of 1.3k ohms.

Uploaded by

K. RAJA SEKAR
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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J1 L4 220uH L5 6.8uH 6.

5 VDC
DC Power
6 2
C26 C29
47/25 R21 R22 220/25 KIA6003S
1.0 1.0 C28

Bypass

AF Out
US1D

Detect

Detect
NJM 47/16

Level

Mute

Gnd

Vcc
7 2360

In
Comtech * AF Output for 22.5 kHz dev =
8 R24 3.3K 1 2 3 4 5 6 7 8 9 (B) 90 - 150 mVrms
FM2400RTIM8 Tuner 5 (C) 130 - 210 mVrms
1 5 VDC R17 - 10K
2400 MHz - 2483.5 MHz 1
F1 C17
R16 .22 * AF Output for 75 kHz dev =
L6 10K C15 56p 500 mV ( 1.2 Vp-p)
2 R23 R15
2200 MHz - 2710 MHz LNB 1K
6.8uH R14
3 4
390 6.0M 470 * Output Impedence = 1.3K
with ENG Receiver PIC 3 T1 - 14uH
C27 C12 C13
2304 MHz - 2559 MHz 4
C30 .001 .001 C19
with Advanced Rx PIC 470/16 C14 .1
C16 C18
.01 10p .01
5
AFT OUT2
* C18 - .01 ufd is for de-emphasis
R13
6
+5 VOLTS 68K
C11
7 C10 - 20p 220p * Pin 1 - Input Limiting Voltage =
BB 2SC3793 KIA6003S 316 uV ( 895 uVp-p )

Bypass

AF Out
562 uV ( 0.16 Vp-p ) max

Detect

Detect
Level

Mute

Gnd
8

Vcc
AFT OUT1 Platinum Receiver L3 * Pin 3 - Meter Voltage =

In
6.8uH 4 Vmax @ 316 mV ( 895 mVp-p )
9 Component Values 1 2 3 4 5 6 7 8 9
Rx Signal Level
Make C2 = 22 ufd / 6.3V minimum R20 - 15K * Pin 4 - Gnd to mute channel
10
R1
C3 = 390p F2 C23
10K Make R19 .22
P4 10K C21 43p
Make C5 = 150 pfd R18
11 Make C6 = 470 pfd 6.5M 470
TU T2 - 14uH
Make C7 = 470 pfd
12 C1 Make C1 = 220 ufd / 16 V minimum -
P3 220/16 (if an un-regulated wall-wart will be used.) C25
22/16 The old C1 (22 ufd / 10 V) can be used for the new C2 C20 .1
13 C22 C24
P5 .01 10p .01
Receiver Original Component Values
14
SDA
15 6.5 VDC
SCL

R4 R11
4.7K 47K
2.2u C2
R2 2K
/50 22/16 8 2SC
6
7 5 2412
R28 R29
10K 10K 470p R5 R6 L1 L2
R25 1K
C3 - 390p 4.7K 4.7K NE592D 6.8uH 6.8uH C8 - 0.05
18 1 4
R8 150 X X 2SD
RA1 RA2
1 2 1383K
2 R3 3
RA3
R26 100K 680 220p 680p .001
17 C10
RA0 C4 R7 C5 - 150p C6 - 470p C7 - 470p
14 470/16
+5 0.22 4.7K VR1 R9 R10 R12
PIC 10K 390K 47K 150
R27 120K
16F84A C9
R30-R37 22/16
4 10K
MCLR

+9
6 1
3 RB0
RA4 7 2 L1 33 µh
RB1
5 8 3
Gnd RB2 R2 300 R6
9 4 C1
RB3 470
10 5 100/6.3
RB4 R8 75 R1 75 R4 75 BC547
16
OSC1 11 6 X
RB5
12 7 X
RB6
R3 R5
R7 CCIR emphasis & de-emphasis
15 OSC2 13 8 47K
RB7 18 75 circuit evaluation to follow
CCIR 405-1 when time permits.
De-emphasis C2
5424 p C3
Network (2200 + 3300)
(2700 + 2700)
100/6.3
(Untested)
13cm FM ATV Platinum Receiver
Comtech RTIM80C Drawing by VE6SBS - www.sbszoo.com Oct 09 / 2003

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