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Showing posts with label tests. Show all posts
Showing posts with label tests. Show all posts

Thursday, 6 August 2020

Work on the future Catterick Garrison igate underway

I have been working on getting the radio hardware working for the future APRS igate that I intend to run from the home QTH, the radio is my Leixen VV-898 as it's sat doing little, the rest is done via a Raspberry Pi with a keying circuit and a USB sound card.

The setup is currently into a dummy load and is powered from my bench power supply for the radio and the Pi is running off my phone charger.

The next jobs to do for this is to get the shelves in the shed and to get the antenna built (which I plan to make resonant on 144.800), then of course batteries and solar panels to get power to the shed.

So far the tests show promise, the transmissions are received by my Yaesu FT2D and it is used to test receive on the igate which seems fine.

I have two You Tube videos on the subject and they are attached below.



73 de M0WNU

Wednesday, 18 April 2018

Handheld CB tests

I thought now would be a good time to test out both my handheld CBs ahead of time, the Midland 42 held charge nicely and transmits in both power settings no problem whatsoever, the radio with the power problem is, of course, the Intek H-520 Plus.

Firstly when I found the Intek it was pretty much dead, connecting the charger was the only way to get it working, removing the charger and keying up at 4 watts immediately after plugging the charger in resulted in the inevitable low battery alert and the TX cut out, same at 1 watt, however it lasted about a minute longer at 100mW, to be expected as the batteries were very low charge and are well due a replacement, and I suspect the charger supplied with the radio is absolutely dire and once I replace the batteries I will be charging them out of the radio with a charger rather than in the radio, I initially was going to swap the batteries out with Eneloop batteries however after doing some digging I found 7DayShop do 2900mAh AA batteries for a good price (Eneloop batteries only go up to 2500mAh, same as the Energizer batteries already in the radio), the good thing is that both radios key up fine.

The Grant II is subject to tests next and these handhelds will be used as part of those tests as well, for both AM and FM modulation, for SSB I will have to tune my RTL-SDR to the appropriate frequency I use to do the test as my handheld CBs can only demodulate AM and FM, however I am satisfied the CB HTs are both working as they ought to be.

These tests are required as a prerequisite of setting up internal comms for myself and guest(s) at the National Hamfest, once the H-520 batteries are replaced then I can focus on running more tests.

73 de 26CT730/2E0EIJ