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Ka7oei mchf. Using the mcHF with computer “Sound Card” modes via the Line-Input and Line-Output connections: The mcHF may be connected to a computer, tablet or smart phone via audio cables and the PTT line on the Microphone cable to allow modes such as SSTV, PSK31, WSPR or other digital “Sound Card” mode. co. The more I operated the mcHF, the more I realized that the KX2 would see more operation from someone else's shack (tent, trail, mountaintop) than I was likely ever to provide it. May 11, 2019 · I've recently sold my Elecraft KX2; the idea of doing so started occurring soon after receiving my mcHF. uk/ Sep 17, 2014 · Assembling the mcHF transceiver boards - getting ready. 4 RF boards Comment to new builders – PLEASE READ: It is strongly recommended that new builders do not make these board modifications, other than those Mar 21, 2017 · The rarity of the 1L6: Owners of the classic Zenith Transoceanic radios from the early-mid 50's will probably be aware of the pain involved if they have to buy a 1L6 tube (or "valve") for their beloved radio: A "good" 1L6 - seemingly the tube that goes bad most often in these radios - can fetch up to $60 today, a significant fraction of what one might have paid for a second-hand radio to restore. Visit UHSDR Project on GitHub. To do this, configure the transceiver as The base of the firmware was started by Chris, M0NKA, and Clint, KA7OEI as part of the mcHF project. 5 to 30MHz TX max RF power: 10W (nominal 5W) RX sensitivity: -126dBm (0,11uV) at BW 300Hz Dec 30, 2015 · One of the features that I added to the mcHF many code releases back was that of "Frequency Translation" in which the local oscillator was "off-tuned" from the receive frequency, + or - 6 kHz for the mcHF with the "baseband" signals for receive and transmit being shifted by 6 kHz (in the opposite direction) in software. To do this, configure the transceiver as Nov 6, 2017 · Approximate Specifications of the mcHF Transceiver for Firmware Version 0. I corrected that, got excellent results all across the transmit range of the MCHF (0. Operator's Manual for the mcHF transceiver Updated for firmware version 0. Jan 27, 2015 · The mcHF uses a standard, inexpensive "sound card" type codec (a Wolfson WM8731 or the compatible TLV320AIC23) for all A/D and D/A. * The base of the firmware was started by Chris, M0NKA, and Clint, KA7OEI as part of the mcHF project. In February 2017 both agreed to change firmware license to GPLv3. By default, ENC1 controls the volume, ENC2 the RF Gain and ENC3 controls the RIT. 8) 2. Jeg har her lagt nogle af de filer jeg brugte til mit arbejde med mcHF radioen. com and modulatedlight. 211 Prepared by C. Nov 20, 2015 · In a future posting I'll describe how the the modulation part of this feature was accomplished on the mcHF along with the pre-emphasis of audio, filtering and the generation of burst and subaudible tones. blogspot. As such, the features What is the mcHF? I've had a few people ask me about this transceiver, wondering what it is, some apparently under the mistaken impression that it connects to a computer somehow like many SDR products. 2017 Noted by: Bojan S53DZ 1. As such, the features Using the mcHF with computer “Sound Card” modes via the Line-Input and Line-Output connections: The mcHF may be connected to a computer, tablet or smart phone via audio cables and the PTT line on the Microphone cable to allow modes such as SSTV, PSK31, WSPR or other digital “Sound Card” mode. If you remember last time, a few of the parts were still on their way - but since then, all have arrived and I have assembled one set of boards and gotten the transceiver operational. The base of the firmware was started by Chris, M0NKA, and Clint, KA7OEI as part of the mcHF project. As such, the features Dec 20, 2020 · Random musings - usually on a technical (nerdy) subject - perhaps related to amateur radio and things found at ka7oei. Because of this the mcHF firmware has been extended in this project with new functionality and also with support for use on different transceiver hardware. This section describes the assembly of the mcHF kit bought 2021 from Chris (M0NKA), SMD parts soldered, with metal enclosure. Nov 20, 2015 · In a previous installment ("Adding FM to the mcHF SDR Transceiver" - link) I described how the demodulation of FM signals was added to the mcHF SDR transceiver but being able to receive FM implies the addition of a few other features, namely that of squelch "circuitry" - of both "carrier" and "tone" types. 219. based on a document from Clint Turner, KA7OEI. "This manual is for the mcHF transceiver, the original design by Chris Atanassov, M0NKA, as an opensource SDR (Software Defined Radio), both in terms of Software and Hardware. Først BOM filer: Oct 15, 2014 · The annual "Homebrew" meeting of the Utah Amateur Radio club meeting was coming up and while I was going to show off what I'd done thusfar on my mcHF transceiver - link I wanted something else that was a bit more "fun" and a very quick build, preferably one that could also give a signal to hear on the transceiver at the same time. mcHF basic specifications (from KA7OEI) Frequency range: (1. Transmit mode: Visit UHSDR Project on GitHub. Turner, KA7OEI Preface: This manual is for the mcHF transceiver, the original design by Chris Atanassov, M0NKA, as an open-source SDR (Software Defined Radio), both in terms of Software and Hardware. 19 20150730 Prepared by C. 5 to 30MHz The base of the firmware was started by Chris, M0NKA, and Clint, KA7OEI as part of the mcHF project. UHSDR means UniversalHamSDR and consists of a firmware and bootloader part. Soldering and Assembly. After powering up, the mcHF transceiver will revert to receive mode on the last frequency, in the mode and using the filter that was in use when it was last powered down using the POWER button. mcHF Hardware modifications as of April 29, 2015 as compiled by KA7OEI for Version 0. com". In this mode LD1, the left-hand LED is illuminated. Apr 12, 2021 · When I reassembled and tested everything, I was getting poor output power shown on my oscilloscope, so I checked again and found I wound T5 wrong. This is, in fact, a completely stand-alone SDR transceiver capable of operating on all bands from 80 through 10 meters. org Sunday, December 20, 2020 Locking the Icom IC-910H to an external 10 MHz (GPS) reference Operator's Manual for the mcHF transceiver Updated for firmware version 0. Aug 19, 2014 · Falling into this category is one that a friend of mine, Brett, N7KG, made me aware of and that is the "mcHF", a small, (relatively) inexpensive SDR-based HF (10 watts, 80-10 meter, SSB-CW) transceiver, based around the STM32F4 processor, designed by U. 27. 0. Diagrammer og BOM filer. The base of the firmware was started by Chris, M0NKA, and Clint, KA7OEI and was exclusively used for mcHF QRP transceiver designed by Chris. As such, the features. K. m0nka. mcHF - HF SDR QRP transceiver S53DZ Status Report Rev 16 Project: mcHF - HF SDR QRP RTX by Chris M0NKA Modifications: FW: Chris M0NKA, Clint KA7OEI, Andreas DF8OE HW: Clint KA7OEI, Paolo IZ6MAF, Andreas DF8OE Date: 26. 63), and then noticed my SWR meter and Power meter wasn't showing anything. This is a 16 bit device capable of a number of sample rates from 8 to 96 ksps ( K ilo S amples P er S econd) , but in the mcHF it is typically operated at 48 ksps , this to allow the visualization of the spectrum May 31, 2015 · There are two "flavors" of the mcHF: The early units used LCDs with "SPI" (high speed Serial) interfaces while the current crop (and by far the majority) use a parallel interface that physically maps the display's RAM to the processor's I/O controller so that it sees it as RAM - plus, it can access the display's normal commands with 16 bit-wide Nov 1, 2015 · In the past I have stated several times on the Yahoo Group that I would not be adding FM to the mcHF (a completely stand-alone QRP SDR HF transceiver) any time soon, mostly because I was quite certain that there was simply not enough processor horsepower to do it properly, but quite recently I (sort of) got obsessed with making it work, going from "0 to 60" in just a few evenings of code 1. Jan 24, 2024 · Clint (KA7OEI) has also provided a BOM giving part numbers from Mouser, another major US electronics part supplier. 26 20151028 Prepared by C. Filer til mcHF. 3/4 UI and Version 0. 9. " KA7OEI, Clint Turner. amateur Chris, M0NKA - see the web site: http://www. Page 6 For a more thorough explanation of the many features of the mcHF transceiver – particularly the items in the menu – refer to the “mcHF Operators Manual” that is found on the mcHF Yahoo Group in the KA7OEI folder of the FILES section. [End] This page stolen from "ka7oei.
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