Simple CW Receiver with GNU Radio

I have been playing with GNU Radio and GRC (GNU Radio Companion) over the weekend and I ended up implementing a very simple CW receiver. This will be very handy on Tuesday when we will be testing the 5.8 GHz UNITEC-1 setup for the first time using the OZ7IGY beacon on 5.76093 GHz. Here is a quick video demo of the receiver where I use my Yaesu FT-817ND to transmit a test signal.

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Improvised Shoulder Strap Holder

When I bought my FT-817 (second hand) it came with a shoulder strap but the shoulder strap holders were missing. I talked to the seller and he promised to send them to me. Few days later I have received another shoulder strap so that now I had two shoulder straps but still no holder!

Now that I’ve got the Arrow II antenna and I will be attempting to work satellites with the FT-817 I really needed to mount a shoulder strap. So I came up with this solution using 1 mm copper wire to hold a shoulder strap from a cheap laptop bag that I had laying around. This shoulder strap is actually much more comfortable and easy to take off when the FT-817 is in the shack. Yeah, so I still have two original FT-817 shoulder straps if anyone needs them…

From YAESU FT-817

Conclusion on the Filter Alignment

I have tried to use my other dummy load on the FT-817. It did indeed reduce the signal strength in the K1 quite a lot. This may sound a bit strange but it is not. You know, the DL-1 dummy load kit from Elecraft is an open dummy load, meaning that it is not in an enclosure, thus the RF signal is radiated from it. My other dummy load, on the other hand, is built into a piece of cooling metal and looks much more radiation closed than the DL-1 does.

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