Ultimate 3S QRSS/WSPR Beacon Kit


Ultimate 3S QRSS/WSPR Beacon Kit

Available on backorder


This is a kit and you will be receiving a plastic bag with components. The photos are representative examples of the completed kit.

The Ultimate3S QRSS/WSPR kit was launched in January 2015. It uses an</span><a href=”https://www.qrp-labs.com/synth” target=”_blank”> Si5351A synthesiser kit</a><span> instead of the earlier pre-built AD9850 DDS module used on the </span><a href=”https://www.qrp-labs.com/ultimate2.html” target=”_blank”>U2</a><span> and </span><a href=”https://www.qrp-labs.com/ultimate3/u3.html” target=”_blank”>U3</a><span> kits. The kit can transmit a variety of QRSS and WSPR modes on all amateur bands from 2200m to 2m.</span><br /><br /><p>The U3S kit was launched in January 2015. It is the new edition of the <a href=”https://www.qrp-labs.com/ultimate3/u3.html” target=”_blank”>earlier U3 kit</a> produced from November 2013 to December 2014. The U3S uses an <a href=”https://www.qrp-labs.com/synth” target=”_blank”>Si5351A frequency synthesiser kit</a> rather than the pre-built AD9850 DDS kit used in the <a href=”https://www.qrp-labs.com/ultimate3/u3.html” target=”_blank”>earlier U3 kit</a>. The AD9850 DDS kit prices are rising and they are becoming less easily available. The <a href=”https://www.qrp-labs.com/synth” target=”_blank”>Si5351A frequency synthesiser kit</a> was developed to ensure continued low cost of the Ultimate QRSS/WSPR kit series.</p><p>Please also see the original version <a href=”https://www.qrp-labs.com/qrsskitmm”>Ultimate QRSS kit</a> and <a href=”https://www.qrp-labs.com/ultimate2″>Ultimate2 QRSS kit</a> pages, and the <a href=”https://www.qrp-labs.com/ultimate3/u3.html” target=”_blank”>earlier U3 kit</a> page to appreciate the heritage. Much of the information in these earlier pages is still relevant and informative.</p><h2>Options</h2><p>The Ultimate3S QRSS/WSPR transmitter kit includes an <a href=”https://www.qrp-labs.com/synth” target=”_blank”>Si5351A synthesiser module kit</a> and <a href=”https://www.qrp-labs.com/lpfkit”>plug-in low pass filter modules</a> which are also available separately for bands from 2200m to 6m. The kit can transmit on any frequency from the amateur 2200m (137kHz) to 2m (145MHz) bands. Changing bands is a matter of plugging in the appropriate low pass filter kit to attenuate unwanted harmonic output. The <a href=”https://www.qrp-labs.com/ultimatelpf” target=”_blank”>relay-switched LPF kit</a> may be used to automatically switch between up to 6 different bands.</p><p>A GPS receiver module such as the<strong> <a href=”https://www.qrp-labs.com/QLG1″ target=”_blank”>QLG1 kit</a></strong> can be used with the U3S kit. It is not strictly necessary. You can do everything manually. But the GPS receiver sets the time and maintains precise timekeeping, sets location (and Maidenhead locator), calibrates the output frequency, and corrects temperature-induced frequency drift. It’s such a nice luxury, and for such a low price we really recommend it! The <a href=”https://www.qrp-labs.com/QLG1″ target=”_blank”>QLG1 kit</a> is powered by 5V, includes proper logic level conversion to the 5V logic used in the U3S, and has onboard LEDs for visual status indication. It is designed specifically for the QRP Labs kits. It has a relatively large PCB ground plane that gives it excellent sensitivity!</p><p>There’s an<strong> <a href=”https://www.qrp-labs.com/u3box” target=”_blank”>aluminium box</a></strong> available. It’s a pre-drilled, printed anodised extruded aluminium case custom-made for the U3S. It includes an accessories kit: two buttons, two toggle switches, 9-pin D connector, power socket and matching plug, BNC connector, four self-adhesive “feet”, and mounting hardware. </p><p>The <strong><a href=”http://shop.qrp-labs.com/index.php?route=product/product&amp;product_id=86″ target=”_blank”>DELUXE U3S set</a></strong> makes ordering easy – <a href=”http://shop.qrp-labs.com/index.php?route=product/product&amp;product_id=86″ target=”_blank”>the deluxe set</a> contains U3S, <a href=”https://www.qrp-labs.com/ultimatelpf” target=”_blank”>relay-switched LPF kit</a>, six <a href=”https://www.qrp-labs.com/lpfkit” target=”_blank”>LPF kits</a> for the most popular bands (10, 15, 20, 30, 40, 80m),<a href=”https://www.qrp-labs.com/qlg1″ target=”_blank”> QLG1 GPS kit</a>, and <a href=”https://www.qrp-labs.com/u3box” target=”_blank”>Enclosure kit</a>. Also included are two extra BS170 transistors which you can fit in the U3S for increased output power (or keep as spares). </p>

Additional information

Weight 0.3 kg
Dimensions 4 × 4 × 2 cm

10m, 12m, 15m, 17m, 20m, 30m, 40m, 60m, 80m, 160m


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