|
|
|
|
SquawkBox T-hunt Transmitter with voice record/playback : US$ 119
|
|
The SquawkBox T-hunt transmitter provides 50 milliwatts of FM-modulated RF at 146 Mhz, on a board measuring 0.9 x 2.4 inches. Includes a voice record/playback chip with 60-second recording capacity, and an integral electret microphone to record a message.
Straps selectable repeat times from 15 seconds to 1/2 hour. Standard frequency 146.565 MHz, ( synthesized ) many other frequencies available. ( specify ) Supervised with a PIC microcomputer, 7-15 VDC, 50/5 mA TX/idle.
Range typically well over 1 mile with a simple dipole antenna. Optional MH+30 1 Watt amplifier. ( see below ) Auxiliary PTT and audio outputs provided to drive an external transmitter. Sold only to licensed amateurs. ( provide your call sign )
- 50 milliwatts RF at 146 MHz
- 0.9 x 2.4 inches, SMT technology
- Voice record/playback chip, 60 second capacity
- Integral electret mike element
- Repeat times 15 seconds to 1/2 hour
- Standard frequency 146.565 MHz
- Other frequencies available ( specify )
- Optional MH+30 1 Watt amplifier ( see below )
- Aux PTT / audio outputs for external TX
- Assembled and tested : US$119
|
|
|
|
|
|
MicroHunt T-hunt Transmitter for ARDF hunts / balloon beacons : US$ 59
|
|
|
The MicroHunt T-hunt transmitter provides 50 milliwatts of CW/FM-modulated RF at 146 Mhz, on a board measuring 0.9 x 1.2 inches. A PIC micro generates the CW message and ident, at regular ( crystal controlled ) time intervals.
Intended for international ARDF hunts, where multiple transmitters operate ( sequentially ) on a single channel. Crystal timing is essential to prevent transmission "overlaps",
in these hunts.
The MicroHunt is also often employed as a DF "homing beacon" for free-flight balloons. ( for payload recovery after landing ) Some of these flights have exceeded 100,000 feet of altitude, and yielded signal ranges greater than 400 miles.
Standard frequency is 146.565 MHz, other ( user-specified ) frequencies available. Ground range is typically well over 1 mile, with a simple dipole antenna. Optional 1 Watt amplifier is available. ( MH+30, described below ) Sold only to licensed hams. ( provide your call sign )
- 50 milliwatts RF at 146 MHz
- 0.9 x 1.2 inches, SMT technology
- Standard frequency 146.565 MHz
- Non-standard freqs available ( specify )
- User-defined CW message ( specify )
- Drives optional MH+30 amplifier ( below )
- Suitable for ARDF competitions with MH+30
- Assembled and tested : US$ 59
|
|
|
|
|
|
MH+30 1 Watt Amplifier / Modulator : US$ 59
|
|
|
The MH+30 is a 1 Watt / 146 MHz amplifier for the MicroHunt / SquawkBox transmitters. A modulator circuit is included for A1 ( CW ) and A2 ( MCW ) modes. When used with a MicroHunt CW transmitter, these modes and the 1 Watt power level yields a transmitter that meets ARDF international hunt requirements.
The operating mode ( FM, A1 CW or A2 MCW ) is selected with a strap on the MicroHunt transmitter. The MH+30 and MicroHunt TX can be "stacked" atop each other, yielding a very small package.
One Watt RF output, ( +30 dBm ) with 50 mW drive, at 14 VDC with 200 mA supply current.
- Amp for MicroHunt / SquawkBox transmitters
- 1 Watt / 146 MHz amplifier ( +30 dBm )
- Modulator for A1 / A2 modes. ( CW / MCW AM )
- 50 mW drive, 12-15 VDC, 200 mA
- Same footprint as MicroHunt CW TX
- Assembled and tested : US$ 59
|
|
|
|
|
|
