This gallery contains 4 photos.
I have been messing around with the DVB-T SDR thing again, this time to download and decode ADS-B (Automatic Dependent Surveillance–Broadcast) signals. All aircraft transponders transmit data on 1090 MHz. The antenna used is a discone in the loft. The … Continue reading
This gallery contains 8 photos.
I have assembled a GPS module to a breakout board for use with the WSPR transmitters that I have brought from Hans Summers G0UPL (www.hanssummers.com – more info here). Delivery should be any day now :-). The GPS module, from … Continue reading
This gallery contains 10 photos.
I decided to build one of the K6XX data leads using SMT. First, the circuit. Next, A nice copper clad board, begging for the hacksaw. Like a knife through butter. The Circuit design is now cut into the board using … Continue reading
This gallery contains 10 photos.
I have modified my older Baofeng UV-3R (Mk1) to implement the LPF mod. See links at the end for further information. A small SMT 0402 sized 33pF capacitor is added… Before opening the case. … Continue reading
This gallery contains 4 photos.
I was having a lot of RFI problems with the W4RT OBP board, so I have now created a Faraday cage around it. More testing soon and an update with the results… First insulate the board (photo above) Then wrap … Continue reading
This gallery contains 6 photos.
I been looking at one of these for a while, well a couple of years. I have just purchased a W4RT One Big Punch and installed it into one of my Yaesu MH-31 microphones (I have two of those). John G1DJI is kindly going … Continue reading
This gallery contains 9 photos.
As a followon to my Bluetooth CAT interface here, John G8DZH asked me how I programmed the serial Bluetooth module. This has to be set to the correct baud rate before pairing with the PC. A USB to serial TTL … Continue reading
This gallery contains 13 photos.
This project provides a wireless CAT control to my Yaesu 897 and uses a serial Bluetooth module from eBay. I got the design and schematics from http://www.lynovation.com/CTR-Remote.htm. The software is for the PC and pocket PC and donation ware. The … Continue reading
This gallery contains 6 photos.
This project was a commission on behalf of Frank M1CPD who required a long wire UnUn. Perhaps better known as a Magnetic Longwire Balun, it is an impedance transformer whose purpose is to feed a high impedance long wire from … Continue reading
This gallery contains 6 photos.
I have started to build the 40 meter QRSS transmitter. Also purchased at the same time the 30m kit. Both were £10 each plus shipping. The kits were ordered from Hans Summers G0UPL http://www.hanssummers.com/qrsskit. More photos from the QRSS tx … Continue reading
