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http://www.g4ddk.com/ https://www.rudius.net/oz2m/70mhz/transverter.htm For amplifiers etc https://dutchrfshop.nl/en/ ismo.vaananen@...> wrote:

I believe that changing the 30MHz low pass filter to a 70MHz band pass filter and modifying the code to allow 4m operation should be enough to have a 4m exiter and receiver. Naturally the PA would

Hi Ken, The TSW kit is a replacement for the factory Raduino that's included with a uBITX. Our kit uses the original factory 2.8" TFT color touch display and you have to order a Teensy 4.1 from either

Jim, Excellent work, kudos to all involved! I have drifted away from the uBitx 'scene' for a while and find myself confused about what is involved in taking advantage of your work here, could you

Steve, There is a kit (or you can just buy the pcb) produced by Sam, G4DDK.? I have no connection with him other than having bought one of his boards. Another possibility is look at the io group

FYI, we've closely calculated current parts costs plus labor to solder the 5351 chip on the kit's PCB and check all connections.? We found that we can sell the full kits for $35 USD (this is a kit,

FreeDV is a framework that incorporates the Codec2 voice codec and various modems. The usual modems on HF use OFDM modulation; multiple carriers, so not suitable for the QDX.

So…idle question really, but … Given that this outputs digit modes using a sound card, could it be used for FreeDV? Very narrow digital voice mode: http://www.freedv.org/ Pretty interesting if it

The wire is 66 ft long with a loading coil and a balun. The variable capacitor I have is 10 inches long with 240/31 capacitor. There’s another value on the cap. 154/16 Thanks everyone!! KE7GO Steve

Steve I use an LC network to load a 55 foot end-fed wire for an original BITX, and for my uBITX. The inductor is a roller coil from an ARC-5 transmitter. This with a Stockton bridge for SWR management

I know. What I meant if the RDs are factory installed

Thanks Scott. The wire is 66 feet with a balun and loading coil at proximal end. The capacitor is 32-241 and is 10 inches long. KE7GO Steve Behlmer

Steve, how long is your antenna, and how many pF is your cap? Scott Ka9p [email protected]> wrote:

Hope I’m not duplicating a previous feed. I’m using an end-fed 40-10 antenna. I have a very high voltage variable capacitor that I would like to incorporate for remote tuning. I can create a

70Mhz transverters are rather rare except for the new ones from Ukraine. On eBay you will find different vendors, each one claiming the originality of the product. Actually I gave once a try for a

Hi there, Has anyone modified a UBITX for use on 70MHz (4mtrs)? or used a 70MHz to 28MHz Transverter? I'm actually looking to make a low power SSB Transceiver for 70MHz. Looking for the basics to work

TSW has been busy switching to a new display font and reworking the firmware manual as well as improving several of the functions of the TSW T4.1 Raduino Clone firmware.? We believe this is complete

Hans has commented on this one earlier. It’s 9V or transistor will burn. If you check the online manual you can change the turns ratio of one of the transformers if you want to use a higher voltage.

Thank you for the innovative product and explanation! You described this as needing a 9V power source with an output of 5W.? I noticed the Power Output VS Supply Voltage graph depicted on the shop

I just read the "draft" manual. So many good ideas for practical designs already worked out by an expert. Hans, Ashhar and Jack (all experts) are forging ahead on new SDR designs and all of them are