Putting Bluetooth into the Tinytrak 4

Byonics provides a Bluetooth add-on for the Tinytrak 4. While I love the TT4 I am not a huge fan of their TT4BT Bluetooth solution. It consists of a board with 2 DB9, no case nothing to protect and makes the whole thing clunky and bulky. Almost 4 years ago I came up with my own more slick and integrated solution and have been happy with it since then.

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Why are APRS RX only iGates bad ?

Every now and then I keep on reading on social networks or forums how people set RX only igates up. RX only igates are just bad, really bad. I could just leave you with the following statement “APRS is a bidirectional network and RX only igates are not bidirectionnal. Period” But let me expose how they are breaking the network.

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APRS with Tinytrak 4 and TYT TH-9000D

TYT TH-9000D with Tinytrak 4 for APRS

After a couple of frustrations (here and here) I have finally managed to get my TYT TH-9000D running quite well with my Tinytrak 4. After a few weeks using it I must say I am quite pleased with the result, the TH-9000D is sensitive and there are not many APRS frames I miss from the nearby digipeaters. I run it on low power (10W) which is plenty enough. So here it is finally, what should have been a quite straight forward mod from the beginning.

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And so I wanted to use a TYT TH-9000D for APRS …

TYT TH-9000D for APRS

I was in the market for another radio for my mobile APRS operations. After reading various articles (here and here) about the ability to add a D-SUB9 connector with all relevant signals for that matter. I ordered one, and it was there a few days later. Before modding the radio I wanted to program the relevant memory channels and test runĀ  it and there came the disappointment.

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