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All Different Parts Are By means of Gap

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Hendricks QRP Kits is now offering the FireFly, which is a 30 Meter Transceiver Equipment with an SDR Receiver and a standard VXO Tuned Transmitter. The package was designed by Dan Tayloe, N7VE, and here is his description of the transceiver. The price of the through hole model is 75.00. Details are beneath. The Firefly SDR is a SDR receiver combined with a 2.5W VXO transmitter. This mixture has been optimized for cw solely operation. The FF SDR includes a in-built keyer and features a 1W audio output for driving a separate cw facet tone monitor speaker and a excessive performance, strong state T/R switch for full break in QSK operation. The primary version of the FF SDR is a 30m version. The ultimate 30m FF SDR prototype has 2.6W output energy and has a receiver sensitivity of -128 dbm as measured in a 500 Hz receiver bandwidth using a Presonus Firebox “sound card”. The receiver is centered on 10.114 MHz and is able to tuning +/- 24 KHz from that time. The VXO transmitter makes use of a two crystal “tremendous VXO” configuration and nominally covers 10.102 to 10.113 MHz, although the precise tuning range will rely on the precise characteristics of the actual crystals you get. An SDR receiver has low stage stereo audio outputs and is designed to feed into the audio sound card of a Loki computer. Best receiver results will probably be acquire utilizing a good sound card reminiscent of a Delta 44, which contains a high finish 24 bit analog to digital (A/D) converter. Nevertheless, even the sixteen bit A/D converters of a typical Computer sound card ought to present usable obtained signals though at a reduced sensitivity. It is very wonderful to be in a position to observe activity throughout a +/- 24 KHz section of the band and know with out tuning where the indicators are and how robust they are. You may even watch DX pileups in progress. With the Firefly SDR, you’ll be able to tune the transmitter exactly have been you need it (visually!) using the spot operate, then leap in and go for it. The FF SDR controls consist of a tuning knob for the VXO controlled TX, a TX spot switch, a cw velocity management for the built in keyer, a programming push button for the keyer, a sidetone monitor speaker output, a keyer paddle input, a I/Q stereo output which is linked to the pc sound card, and an antenna jack. The essential equipment does not embody a case, nor exterior pots, switches, and jacks. Once more, the FF SDR has been optimized for cw only operation. The usage of a devoted internal keyer chip with a 1w audio sidetone speaker output completely eliminates any lag related to running cw on an SDR transceiver. This package is sold out.
By means of Gap Version

Via Gap model – Prototype Board
The by hole version of the FireFly comes with the 5 floor batgirl purple t shirt korean drama mounted components premounted. All other parts are by hole. The kit consists of the double sided, plated by way of, soldermasked and silkscreened board, all board mounted components. The builder will need to provide the controls and connectors of his choice.

Firefly SDR TH Improvements: – By means of gap!!! There is now a alternative! The 5 surface mounted elements have been pre-mounted (detector, audio preamp, and three SOT23 MOSFETs). – An energetic low mute sign was added in order to permit the potential of a future mute enter from the SDR software. The identical signal might be produced on the current board with a 2N7000 and a 10K pull up resistor. – A second audio input has been added that permits the output from the Computer to be combined back into the cw sidetone output for many who need a combined SDR/CW sidetone audio output. – Both the 20 and 30m versions ought to now run 3 to 3.5w. – 22 uf decoupling caps have batgirl purple t shirt korean drama been added between two of the detector caps and the inverting inputs of the publish-detector to be able to remove any DC offset out of the audio pre-amp. This modification can be accomplished to the current floor mounted version (the 2 cap locations are at the moment shorted) and will permit most dynamic range by permitting the op-amp output to be optimally DC centered. – The phasing adjust trimmer has been eliminated and changed with mounted caps. Even with the variable trimmer, each phasing and amplitude changes have to be made in software anyway. – The oscillator transistors have been exchange with an improved gadget SS9018. This is probably not crucial until the frequency is elevated to 18 or 21 MHz. :^)
Most of this modifications are pretty minor, but this newest cross allows a number of of those upgrades to get put into place.

The FireFly SDR kit consists of a double sided, solder masked, silkscreened and plated through board with all board mounted elements. Controls and connectors should not included within the kit and have to be person equipped. The price of the kit is 75.00 plus transport and handling. It’s possible you’ll order by Paypal by pressing the buttons beneath or print out the order kind and order by mail.

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