Filters
Sotabeams Elite DXing and Contesting Devices
SOTAbeams Bandpass Filter for 2 Meters
SOTAbeams Bandpass Filter for 2 Meters is made by SOTAbeams for the top of a handheld transceiver that is being used in areas with high RF levels with multiple transmitters. In these places, the HT (Hand-Talkie) can suffer from front end overload and signal blocking. This bidirectional bandpass filter can prevent that out-of-band signal overload. It is completely assembled into a very lightweight nylon case and is ready for use. It has SMA female connectors at each end and can be adapted to any low power 144-148 MHz radio or antenna. Here are the detailed specifications for the SOTAbeams Bandpass Filter for 2 Meters: Power Rating: -FM/DATA, 5 watts max., 2 watts continuous, (30% duty cycle recommended, max. continuous TX approx. 90 seconds) -SSB, 5 watts PEP max continuous Filter Bandwidth: 144 - 148 MHz Filter Attenuation: -In-band typically < 3dB -433 MHz > 70dB -155 MHz approx. 25dB -FM broadcast band >70dB -Air band > 50 dB Temperature Range: 32-122 degrees F (0 – 50 degrees C) Weight: 0.88 oz. (25 g) Dimensions: 1.77 x 0.79 x 0.71 in. (45 x 20 x 18 mm)
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$77.99
SOTAbeams USB Battery Pack Keep-Alive Load Kits
SOTAbeams USB Battery Pack Keep-Alive Load Kits are easily assembled PC Board kits that provide an adjustable USB DC load. Some power banks and many USB battery packs switch off (go into a sleep mode) if the current being drawn is too low. This means that your device works for a few minutes and then stops. Often just a few extra milliamps current draw will keep the battery pack alive. There are various circuits on the web that give a pulsed load which works with some battery packs - but unfortunately SOTAbeams' tests have shown that such circuits don't work reliably with all battery packs. Just plug one of these Keep-Alive Load Kits into your battery pack and increase the current until battery pack stays on reliably (usually between 6 - 150 mA). Depending on the current that your powered device takes it may be a little as a few milliamps. An on-board LED indicates if the battery pack is live. The load supports a standard USB data connection. USB plug and socket for easy in-line connection. A heat-shrink sleeve is provided to protect the unit in the field. Don't have your WSPRlite lose its power source! Keep it powered up with SOTAbeams USB Battery Pack Keep-Alive Load Kits from DX Engineering.
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$15.99