SZ123

This gadget is a low-power TV Transmitter for a video enthusiast. The TV transmitter can transmit a signal from a VCR to any TV in a home or backyard or even retransmit cable TV for your own private viewing. Videotapes can be dubbed from one VCR to another without a cable connecting the two machines together.

This TV transmitter can be used in surveillance for monitoring a particular location. You can build the TV Transmitter for less than $30 in one evening! The tv transmitter kit is available from the source given in the Parts List. Nevertheless, we present enough information here to build the TV Transmitter from scratch.
The TV Transmitter that combines line-level audio and video signals, can transmits the resulting signal up to 300 feet. The circuit can be powered from a 9- volt battery. It is suggested that a 12-volt DC supply during be used during the alignment procedure. This would insure maximum transmission range and best possible image.
Theres's no special equipment required for aligning the TV Transmitter. You can do it with a very simple procedure. The Transmitter's output can be tuned to be received on any TV channel from 2 to 6. The range of channels is wide enough so that the unit will not interfere with other TV viewers who are nearby. To comply with FCC rules, it is mandatory the nearby TV viewers are not disturbed by the transmission. If your activities interfere with the reception from a licensed station, regardless of the reason, you must shut down your unit.
TV Transmitter Schematic Diagram

TV Transmitter Parts List
Circuit Description and Construction please download here
D1—1N914 silicon diodeQ1-Q—2N3904 NPN transistor
(All fixed resistors are 1/4-watt, 5% units .)
R1, R2, R11—10K
R3, R7—1K-ohm trimmer potentiometer, PC-mount
R4, R9, R10—10K
R5—47K
R6—75
R8—4K7
R12—75-ohm (optional, see text)
C1, C8—100-µF, 16-WVDC, electrolytic
C2—2.2--µF, 50-WVDC, electrolytic
C3-C6, C11, C14, C15—001-µF, ceramic-disc
C7, C9—2.2-pF, ceramic-disc
C10—100-pF, ceramic-disc
C12, C13—68-pF, ceramic-disc
Additional Parts and Materials
ANT1—Antenna, telescopic-whip
B1—9-volt battery
J1-J3—RCA jack, PC-mount
L1—0.15-µH miniature inductor
L2, L3—2.2-µH miniature inductor
L4—0.14- to 0.24-mH adjustable, slug-tuned coil (see text)
S1—SPST, push-button switch, normally open
T1—4.5-MHz 1F-can-style RF transformer (see text)
Printed-circuit materials or pre-fab PC board, battery holder and connector, pair of RCA patch cords, solder, hardware, etc.
Note: The following items are available from
Ramsey Electronics, Inc.
793 Canning Parkway
Victor, NY 14564
Tel. 716-924-4560
TV-6C VHF TV Transmitter Kit