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mcHF QRP rig build

Posted: Thu Aug 03, 2017 1:26 am
by Ve3ids
I have just completed my first contact with my newly built mcHF rig. This is a SDR compact sized standalone rig. It covers all HF bands and all modes, CW SSB AM FM and digital via USB to a PC. It also has freedv digital voice. There are different ways to build one, I bought the boards and the components, about 500 in all. You can buy the boards with the smt parts already factory soldered on if you don't want the maximum frustration version like mine ;) . It is not a Heathkit or Elecraft build, it is an open source project that is continually evolving. There have been a few mods during the few months that I took building that I have done. The rig is similar to a kx3 in size and function but has a bandscope like a 7300 and is touchscreen as well. Here is the link to find more info and is where you can buy boards etc:

http://www.m0nka.co.uk

Here is a link to a short video of mine in operation

https://photos.app.goo.gl/m4rRx0VeJvmlH29G3

73 Don ve3ids

Re: mcHF QRP rig build

Posted: Thu Aug 03, 2017 3:19 am
by va3ts
Nice project Don, I have a Cushman ce-50 here if you need it...73

Re: mcHF QRP rig build

Posted: Thu Aug 03, 2017 11:31 pm
by Ve3ids
Thanks Tom,
Just tried a converted speaker mic on the new rig on 40 SSB and had a QSO with South Carolina at 5 watts. It works fine on phone as well as CW. Pretty impressed with the design.

Don ve3ids

Re: mcHF QRP rig build

Posted: Fri Aug 04, 2017 1:39 am
by ve3pav
good job on the build,it looks awesome.

Re: mcHF QRP rig build

Posted: Fri Aug 04, 2017 6:38 pm
by Ve3ids
Here are a couple pictures of the two boards that are built for the rig:

https://photos.google.com/u/0/photo/AF1 ... _Rwsx5yk9N
https://photos.google.com/u/0/photo/AF1 ... TY69KVc8Oe

The most difficult part is the 100 pin flat pack processor. I messed up a couple of them before I bought a cheap rework station from Amazon ($89). The rest is not bad as long as you have a good magnifier to inspect things with and pay close attention to parts placement and check things off as you go. This is not a Heathkit type of build, there is no manual to lead you step by step. You have the board layouts and schematics and parts lists to work from and you are on your own. There are some variables to watch for due to some different things that can be done, primarily with the LCD display. Lots of research on the yahoo group and the German Wiki (posted in English) will be necessary. The yahoo group is fantastic, tons of fellows on there to answer questions and help out. Being an open source project, it is continually evolving and you can upgrade your rig later for free as the hardware does't change, just the firmware and you will have new features. A some levels, there will be mods required for some changes but these are only if you want to keep up with the latest developments in the technology. This is what makes it different than buying a commercial rig. The issues I had with the build were all related to the soldering of the processor. There are nice videos on youtube on drag soldering that are worth practicing (no it doesn't require dressing up ;) ) This could be a good project for some in the group that want to build a great project, might not be a first build though. Perhaps a small low cost kit from somewhere to get your feet wet would be best to do first. I have learned a great deal during this build and it has had its ups and downs but was well worth it. Now I am off to build a case for it.

73 Don VE3IDS

Re: mcHF QRP rig build

Posted: Wed Sep 13, 2017 8:49 pm
by Ve3ids
I have the case finished now and the mcHF has become my main rig now. I haven't used the ICOM since I got the mcHF QRV

73 Don ve3ids

Re: mcHF QRP rig build

Posted: Thu Sep 14, 2017 12:19 am
by va3ts
Beautiful Don, nice job, something to be proud of...73