This is the 14th
KITS page
(from page 211 in New 2003 Philmore catalog)
(Click on any photo for larger view)
Photo not available at this time
MONAURAL
PREAMPLIFIER
Our audio amplifier kit works very well, but if your
input is a tape head, magnetic phono cartridge or electric mike, the input
level may be too low to do the job. This small preamp can be used in these
applications; plus, we have included a mike that may be used with the
circuit. Power at 6V to 12V (current at 12V is 3mA, only 2mA at 9V). The
gain is more than 40 dB.
No. 80-980 Preamp kit
17-1/2
Watt Mono Amplifier
A high quality audio amp that can operate on a low voltage,
12 V DC recommended. Uses the Hitachi HA13001 IC and a dozen external
components for a compact and powerful monaural amplifier. Builder must
supply his choice of speaker (4 or 8 ohm) and some heat sink grease to apply
between the IC and the heat sink. Includes PC board and all parts. Build two
for stereo.
No. 80-1105 Amplifier kit.
Variable
Power Supply
The kit comes "complete", which means the transformer
A.C. power cord and a fuse holder are included. Most power supply kits leave
finding such things to the builder. Output via screw terminals, making this
a good bench supply for the kit builder. Voltage may be varied from a volt
up to about 24 volts DC and is well regulated; i.e. voltage is very stable.
Using the LM317T I.C. and including the Philmore TR241 (24 volt, 1 amp)
transformer permits an output range from about a volt to 21 volts. Higher
current is available at the higher voltages but lower voltage are at lower
currents; for example, around 5 volts output maximum is around 350 mA.
Maximum current is available in the 18 to 22 volt range . Ripple (on line
noise) is finite, making this a good kit for those audio and R.F. projects
where you do not care to hear power line noise. Note: We do not recommend
a beginner build this kit unless he has some experienced supervision to
help. Any kit that connects to the A.C. power line is potentially dangerous
to the inexperienced builder.
NO. 80-970 Variable Power Supply
R.F. Bug Sniffer
(Hidden Transmitter Locator)
If someone put a BUG (listening device) in your meeting
room, would you know it? Today’s small circuits make listening devices too
easy to conceal to ignore. You may want to assemble this one for resale to
nervous and needy users. A high quality circuit, should be considered even
by the professional. It will detect any transmitter sending A.M. or F.M. or
just C.W. at frequencies anywhere from ten to 450 MHz; peak sensitivity is
in the 80 to 120 MHz portion where many bugs would be found. The signal
strength is indicated on a bargraph, so the closer to the source you get,
the higher the indication. With some practice, you should be able to find a
covert transmitter to within a few inches of its location. "Professional"
bugs, placed by serious operators can be found easily. Operation on 9 Volt
battery for portability.
No. 80-990 Bug Sniffer kit
PLL VFO EXPERIMENTER’S PACKAGE
(Click on photo for lager view of the board. The Black and
white photo shows the ‘bottom" board; the top board is mounted on spacers above
that board and contains the LCD readout and the entry keypad for entering the
frequency. The top board is shown below. )
PLL-VFO Experimenter Package (experienced builder only) 440Khz
to 185mHz.!
This new VFO Circuit is a two part
(two board) system for the experimenter. The "Bottom Board"
(photo) is the PLL and VFO, complete with an area for the experimenter to
add whatever circuit he desires; such as a transmitter, receiver, transceiver
etc.. The "Top Board" (photo not here yet)
is a controller with a keypad for frequency entry and an LCD digital readout
that displays frequency. The Top Board controller communicates with the MC145170
chip on boards may be stacked with spacers and will mount neatly in a Philmore
No. PB107 plastic case (not included). Not intended to be a complete kit, this
circuit pair is intended to provide a highly flexible platform for the
experimenter, student or Ham radio builder etc.. The circuits provide Rock-Solid
frequency control with a very easy to use human interface (that’s fancy for
push-bottom keypad and readout). Included are circuit ideas, in schematic form,
including a forty-meter transmitter and a radio receiver circuit. The
prototyping area is large; the user can build a simple or multi-stage AM or FM
receiver, CW rig, signal generator etc. The circuit may be used with various
oscillator designs from 440Khz to 185Mhz. The circuit
employs an MC145170 PLL IC which provides drift-free tuning with considerable
stability. Operates on 12 volts DC. You will need up to 100mA to power the kit
plus don’t forget to add enough current capability to handle your own addition
to the PC board.
No.80-1401 PLL Exp. kit
NOTE: This is the
end of the fourteen page kits section.
Don’t miss the new kits page with the kits just
introduced in 2003.
cuit
employs an MC145170 PLL IC which provides drift-free tuning with considerable
stability. Operates on 12 volts DC. You will need up to 100mA to power the kit
plus don’t forget to add enough current capability to handle your own addition
to the PC board.