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With all the controversy surrounding this kit I am sorry I even purchased it. It's sitting here waiting to be assembled. I suppose I'll throw the PCB boards away and keep the parts for future

Having built both a phasing receiver and many filter rigs, I think a single conversion filter rig is easier.? ? Why not build a single conversion superhet receiver first.?Good luck? 73? Bill

All: When I built mine one of the buttons was faulty. I replaced them both. As I recall it would not make contact. Bill N7EU

Correct. My bad. Mike K5ESS

Left button issues suggest R44 or the button as right button and rotary encoder are on the same path (to MPU pin 26. Each button encodes as a different voltage into an analog pin to reduce the number

FYI the QCX receiver is a image rejecting design (phasing) for SSB changing a few resistors in the audio filter (from CW band width to SSB) and it sounds very good. Allison -- Please reply on the

Simple, a scope is over used. Often not required or at best a handy tool. I build mine using mostly my ears and a good DMM. If you have EMRFD the miniR2 design is pretty much precooked and a just

QRP Labs has a QSD receiver and a phasing module to go with it. Once you understand how the phasing SSB Rx works you might be able to figure out how to do a phasing QSE. Bob Macklin K5MYJ Seattle, Wa.

No, by double the amount of offset. If you move the inserted carrier up x Hz at the receiver, the upper sideband signal's audio decreases x Hz while the lower sideband signal's audio increases x Hz.

Hello everyone, This is my inaugural post here in the QRP-Tech group. I have done a lot of hacking on the BITX40, and feel that i understand it fairly well. I also have homebrewed a DC receiver. I've

Only when the Receiver cannt hear the other sideband at all. However add an offset and your computer is the receiver and the software filters are quite narrow. It can work. It is a very narrow case of

Allison, No I have not tried it but I’m only making the claim for the FT8 digital mode not voice. My rational is that with a RIT or transmitted frequency offset the baseband audio would have the

Mike, Have you actually tried it. I have in an early attempt to make a simple 10M DSB HT pair. The RX was a simple direction conversion to minimize parts. Both crystal controlled so no issue with

I think two DSB transceivers can communicate via FT8 quite well as long as their carrier frequencies differ by a couple hundred Hz or they apply a couple of hundred Hz of RIT if their transmitted

Nick, "Well, I'd like to weigh in and give DSB a little love. It seems to me to be a great way to generate a "phone" signal with minimal circuitry. And the gain you get by going from AM with carrier

> > > Well, I'd like to weigh in and give DSB a little love. It seems to me to be a great way to generate a "phone" signal with minimal circuitry. And the gain you get by going from AM with carrier to

Mike K5ESS: Yes, no problem with receiving a DSB signal, as long as you are receiving it on an SSB receiver. It is DSB at both ends which is the problem. As far as I can think of, of all the many

DSB can be received on a GC receiver that has a BFO. And it can sound better than SSB. For weak signal stuff you really need CW or maybe something like PSK. I like OLD GC receivers with sliderule

DSB only works if the other guy has SSB RX. Simple as that. Doesn't make any difference what the information is so long as you can ignore the other sideband. The other problem with DSB is if your

Hans, I don't think there will be any problem decoding a DSB FT8 signal. As an example, if you have your transmitter set to 14.074 and you have WSJT set for transmit at 1 kHz, the upper sideband will