Due to some personal issues, I will no longer run and maintain the ON0MON Repeater. I will decommission the equipment on the 31st of December 2016 and probably return the call sign to the IBPT/BIPT on the same date.
The repeater is for sale, in case someone wants to buy it, and it is based on:
Tono 70W UHF Power Amplifier,
Duplexer cavity tuned for the actual frequencies
D-Star DVRPTR V2 (Ethernet + USB support, works standalone).
Weekend project: Solar rechargeable Power Bank for the FT-817ND.
I had two spare batteries, a plastic box IP65, a 20W solar panel with its controller, a tripod and some wires lying around my garage and I’ve decided to build something with it. I placed the two batteries in the box and wired using a 1.5mm cable, then installed the solar panel controller outside and wired the batteries to it. I’ve used a 3 X 12V car plugs as output considering that the solar panel controller has two USB ports embedded so I will have both 12V and 5V ready available anytime.
For the step two I started to build the support for the …
I went to Friedrichshafen last June and my friend Jean (IZ7SIA) started busting my chops by eulogize how wonderful is the Yaesu FT-817ND, how portable is the FT-817ND, how nice is the FT-817ND, and blah blah blah.
I was not really interested in a portable HF device because I’m already working on the M0NKA’s project, the pain-in-the-ass-to-build QRP radio mcHF therefore I didn’t want to spend money on another portable rig; then when you cross Jean with Max (IW0GXY) and both are with you in front of Marco’s stand (IW2CSY) then you are forced to take out your wallet and swipe your credit card… so now I’m a owner of a FT-817ND. …
My old and very good friend Enzo (Vincenzo – IU7ACP) has just build a single face MMDVM modem for testing. I will receive the board in the next few days and start some tests with some Motorola and Kenwood radio to see how it works. There are no plans for a mass production at the moment. I will deal with Enzo to have it Open Source with all the diagrams published for everybody.
Update 18 Mar 2017: Unfortunately the device didn’t work and I have abandoned the project. …
My son (ON3II) and I just started building the mcHF SDR Transceiver project form m0nka (http://www.m0nka.co.uk).
It is an interesting project and honestly quite difficult to complete even using the pre-populated boards.
There are so tiny components such as the coils and some SMD integrated circuit which are requiring a proper SMD soldering station. A reworking station might do the job but the risk of de-soldering another component installed nearby is very high.
The radio itself costs 259 GBP plus 10 GBP for the shipping in Europe which converts to 350 Euro circa, not a bargain but still a funny project. The kit doesn’t include the box neither the Power Amplifier final Mosfet (RD16HHF1); the box is available from Artur SP3OSJ (http://www.sp3osj.pl) for 50.50 Euro shipping included in Europe. For the Power Amplifier MosFet, you can find them almost everywhere at a price ranging from 1.50 Euro to 25 Euro per piece. I bought mine from FunkAmateur in Germany (http://www.box73.de) for 6.70 Euro each, so 13,40 for the pair plus shipping.
I’ll post a review as soon as the kit is completed.
I posted on GoFundMe a support request for a money collection to buy a DMR Repeater to cover the Mons area. The crowdfunding is something mysterious to me and I don’t have idea on how it will end up, if someone will really put money on such a project or not. I’ve advertised the initiative on Facebook and Twitter and got some feedback but no money (yet!).
Some weeks ago the Yaesu DR-1X repeater decided to give up on power.
Aurelio ON5AFB, Giorgio ON3II, Alex IW0GXY and myself started to troubleshoot the issue to discover that Yaesu sucks. Please read twice: YAESU SUCKS!
Yeasu engineers decided to build a repeater by using a pair of downgraded version of FTM-400 radios and a aluminum radiator stuck on the transmitter with a silicon gen. These radios are build for a duty-cycle of 1-15 not for a heavy-duty cycle therefore the poor 1/32w resistors controlling the MosFet had become charcoal…
Thanks to Max IW0GXY, we managed to install a front-end to the transmitter and thank to the patience of Aurelio ON5AFB, the resistors were replaced with a more powerful one. Aurelio did something better, re-built the cover of the transmitter to have an additional fan directly on top of it. The fan is configured in extraction mode so the air flows from inside to outside reducing the collection of dust.
I would never die for my beliefs because I might be wrong. (Bertrand Russell)
Max IW0GXY is a great friend but he is also a problem (to me) at the same time; it is solely his fault if I reach the point to dig the internet to find a way to build a home-brew DMR repeater.
We are evaluating several ways ranging from a ready-made Hytera repeater for 1800 Euro to a cheap experimental MMDVR board plus two Motorola GM300 or two Kenwood TK-805.
Honestly there is absolutely nothing in between unless you want to consider the Motorola DR3000 as a valid solution which costs more than the Hytera compare to a brand new Motorola or like an Hytera compare to a used device on eBay with absolutely zero warranty, so Hytera is more convenient than a Motorola and MMDVM is more convenient in absolute.
In cooperation with IW0GXY (formerly ON4GXY) Massimiliano, I started to explore the non-sense of the DMR technology. We bought a pair of Tytera MD-380 handhelds and a couple of DV4mini and we will try to experiment on such technology. I got my ID 2066034 which is required by the repeater in order to grant access to the equipment.
The plan is to explore the radio and try to catch the flavor of it and then, eventually, install an access point or a repeater.