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Tag: GM900

Technical Updates

Technical Updates

Today I introduced some small changes to the two repeaters:

– Added CTCSS Tone to the C4FM/Analog Yaesu Fusion Repeater, tone is 100Hz
– Temporarily disconnected the D-Star Repeater from the World Wide Network to avoid interference between the two systems.

Repeater(s) frequencies:

– UHF 439.1125 MHz
– Shift: -7.6 MHz
– Repeater A modulations: Analog FM and C4FM, CTCSS Tone 74.4Hz 100Hz;
– Repeater B modulations: D-Star only (Standalone repeater);

APRS Node: 144.800 MHz

The plan is to re-connect the D-Star to the internet by the end of the week.

ON0MON back online

ON0MON back online

The repeater is back operational and working perfectly. There are no more Raspberry Pi for me; even if the repeater is experimental and subject to outages, it should not be for an unreliable hardware. Raspberry Pi are good for playing with and for home applications, not for a 24/7 repeater.

The server is now a Intel Xeon running at 3GHz with “just” 4GB Ram and a 64bit Operating System.

Ah… just because you spent your time reading this post, here is a teaser: soon there will be some big changes, so now, more than before, stay tuned! 🙂

Unexpected outage – Work in progress

Unexpected outage – Work in progress

The first Raspberry PI broke a week before the winter holidays, luckily I had a second Raspberry PI and so by simply swapping the memory card I was able to restore the repeater in a couple of minutes.
Today the second Raspberry Pi decided to stop working so I’m moving everything on a spare computer I have but it will be based on Windows due to some hardware incompatibilities with Linux.

So, ON0MON is work in progress, expecting to be back no later than tonight, 1st Feb 2015.

Stay tuned.

100% Service UP

100% Service UP

Holidays are over and everything is back operational.
I’m considering to shutdown this website, quite useless as there are no real feedback and no real benefits and move to the more common Facebook platform. Twitter accounts are already setup…

Hey you two people (spammers excluded) out there that are reading this blog time by time: if one day it will be unreachable try again after a couple of days, if still unresponsive means I shutdown the website. 🙂

ON0MON Activation

ON0MON Activation

As I wrote on the previous message, I’ve been for three weeks roaming around Europe. So I went back and I just recalled the fact I gave the postal box key to a friend in order to collect the mailing a couple of times per week. There were some leaflet and some envelope in the mailbox but I decided they could wait for a couple of days, till monday to be read (and bills get paid).
Today the friend show up at my house, he notice the truck parked at the common parking lot and understood we were at home, so he brought the mailbox key to us with the mail (and bills).

One envelope caught my attention, it had BIPT on the top left side of it… I knew what was inside but I had no strength to open it… my son told me I had a big smile on my face while I was staring at the envelope and he become curious about the content as well.

It is the repeater license for ON0MON and I’ve been granted APRS and DSTAR capabilities!

I conducted some tests with my call sign for a certain period but everybody was saying the repeater permit and call would take over a year to get granted, so I was not in hurry to setup everything and I was considering the infrastructure as testing equipment.

So I started the APRS Gateway, changed the call and password and now ON0MON is operational on 144.800 for APRS operations.

The DSTAR capability will take a couple of days before being operational. I setup two different DSTAR repeaters, one is based on 2x Motorola GM900, UHF duplexer/cavity, embedded power supply and DVRPTR V2 board OLED Display version, max power 25W.
The second one is based on a modified 2x Standard C-5608 + Dutch Star GPSK Modem + 35A Switching Power Supply.
Both are feeding a vertical antenna on top of 15m tower.

Frequencies for the DSTAR Repeater are:

Frequency: 439.1375 MHz
Shift: -7.6 MHz

Someone once stated I decided to stay on the wrong part of Belgium… well, it looks like something made that assumption to be wrong and I’m pretty sure he will be happy to be wrong on that statement. 😉

I’m thankful to the UBA for the support they are providing in order to activate the repeater, a special thanks goes to Filip ON4PC (UBA Repeater Manager). He is doing a tough job and language barriers are not helping the management of the structure. We had some arguments in the past and I hope they were constructive for our activities.

eBay vs Amazon

eBay vs Amazon

I’m an Amazon addicted, doesn’t matter where is the Amazon shop, it can be .co.uk, .es., .it., .com, I’m buying from Amazon.

Following the great deal at the Veron Ham Fest I was looking for a RIB adapter to reprogram the Motorola GM-900 Radio to the proper frequencies and conduct some tests.

I went to Amazon and found a complete RIB programmer (RIB+Cable) for 55 Euro plus 15 Euro Shipping and Handling… quite expensive considering the amount I paid for the repeater itself (90 Euro) and the fact I will use that programmer just one time.

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