Simpleceiver Plus SSB Transceiver ~ A new DifX
The Simpleceiver Plus SSB Transceiver is on the Air!
10/29/2017 ~ Stations Worked on the N6QW Simpleceiver Plus SSB Transceiver CQ WW
As you can see I am a big time contester. But I sure could hear lots of stations and so am delighted with how this homebrew project has turned out. The XL5T was worked running about 6 watts.
Have some parts on order which should arrive next week (mid-week) and hope to start construction of the V.2 Simpleceiver Plus SSB Transceiver. Essentially the circuits are mostly on a single PC board and will have a 9 MHz IF. I will share that info on this blog
Pete , N6QW
10/28/2017 ~ Another Simpleceiver Plus SSB is "On the Air"
Here is the text of an email I received from Jelle, PA3GUP, this morning;
First 3 contacts in the log
All with 10watt and a small dipole.
best 73 Jelle, PA3GUP
So OK time to get off the couch and get with the program. I was happy to hear about Jelle's success. That said this morning running 600 watts and my Simpleceiver Plus SSB Transceiver during the CQ WW DX contest I worked several JA's in the contest and that my friend is about a 5000 mile trip from this QTH.
I have a Version II in the works and will share that with you shortly. This one has a 9 MHz GQRP Club Crystal filter versus the 12 MHz homebrew filter. My plan is to not cannibalize Unit #1 as V.2 will be a separate build.
10/26/2017 ~ N6QW is NOT on 630 Meters!
We have all heard the axiom" If it walks like a duck, Looks like a duck and Quacks like a duck --Then it is a duck!" That is not always true.
Imagine my surprise when VE7SL, Steve, emailed me an inquiry if I had by mistake called up 600 Meters in WSPR settings when I actually was copying 40 Meter signals and reporting them as 630 Meters.
Well I don't know what to say? I did have Power SDR set to General Coverage and cranked down to 0.474200 MHz and there were signals showing up on the waterfall. So there is that Ghost in the Machine.
I simply can't explain it other than the possibility of a problem with the Si570 LO. One shortcoming of the Si570 is that the lower frequency limit is about 4 MHz as opposed to the Si5351 where it is 8 KHz. Since the LO is set for 4 X the actual frequency (prior to being injected into the SN74HC74) that would mean the LO would operate at 1.8968 MHz which is below the 4 MHz threshold. So that might be the issue.
I did have the Rx set to 0.474200 MHz so it was not like I called up WSPR for 0.474200 MHz but actually tuning 7.038600 MHz. Another one of those challenges.
But that said --I have used the same front end to copy WSPR on other bands. So it remains a mystery. Guess I best stick with what I know.
Yes I am now listening to 630 Meter WSPR signals. The Receiver is HOMEBREW using two J310's for the RF Amplifier stage and the Detector is a pair of ADE-1's. I homebrewed a signal splitter using a type 43 ferrite core balun and the LO is supplied using a kit called the QRP2000 which drives an Si570. The Si570 can be acquired as a sample [free] from Silicon Labs and the LO Board comes as a kit less the Si570 for about $20 (From the UK).
The output from the Detector board is fed into an M Audio Delta 44 Sound Card and the SDR software is the Power SDR V2.4. The computer is an Intel Atom at 1.8 GHz. WSPR 2.0 is being used. In case you are wondering the antenna is my 40 Meter droopy dipole with the antenna tuner bypassed -- about 92 feet long.
|Bare Bones Receiver Front End|
10/25/2017 ~ Another Simpleceiver Plus SSB Transceiver On the Air
In an attempt to complete this project here is the future plan.
- I will document the project fully with all schematics and this will be done using my website http://www.n6qw.com
- The effort on the project will be kept open only insofar as those following along with the project will complete their builds. Don't want to leave you out to dry.
- I will be doing some additional peeking and tweaking of the circuit elements to insure maximum performance.
- Email me with any questions to firstname.lastname@example.org