This whole topic has got me thinking.... Given that small signal RF generation is pretty much a non issue these days, I have to ask why build amps intended to take a modulated RF signal at significan
I agree. A complete transmitter would solve many technical issues and depending on the implementation, could drastically improve performance. Solid State broadcast transmitters that transmit digital
I was thinking in terms of taking the data (possibly as ethernet frames) straight into a modest FPGA and then doing the upsample followed by cordic carrier generation thing in the gate array. Somethi
A good portion of this has already been done. Check the HPSDR group. Also look at the ADAT. The final hurdle is to do this at the legal limit. We did have transmitters back when AM was dominant. I fo
Yea, I know about the HPSDR project. AM is really the easy case as there is no phase modulation component, so EER is really simple and class E (as long as you don't want easy tuning across a wide ban
Well AM does not require EER. We have used EER techniques for decades to trick AM transmitters to transmit various things other than AM. EER or envelope elimination and recovery in the old analog day
Viking had a legal limit transmitter (Invader 2000?) while Hallicrafters had a legal limit transceiver, the SR2000. I have a top of the line transceiver the Yaesu FTDX5000MP and what was a leading tr
I was only advocating the transmitter being integrated (and only part of it at that!), adding the RF signal generation and I/Q modulator to the amp housing seems to be to be fairly trivial small sign
Dan I agree generally and in principle. There may be a few different ways to do this which is well worth discussing. I am not sure how I got misquoted below. _________________________________________
What is being proposed is more like a legal limit flex radio. SDR goes a long way in helping to forestall obsolesce. _______________________________________________ Amps mailing list Amps@contesting.
Probably fairer to say that SDR POTENTIALLY goes a long way in helping to forstall obsolescence. Without accepted standards for how to do this thing you would quickly end up with lots of manufacturer
When I/Q is via Ethernet, I do not see a connector issue. Any I/Q device I purchase supports Ethernet or I don't buy it. I/Q over Ethernet opens the door to things that were previously very difficult
Which moves the specification problem from hardware to protocol. But as long as the protocol is defined (ports, packet formats, how clock distribution is handled, how does the software find out what
Good luck fixing it when it breaks. Or maybe you handle 100 pin chips a lot better than I do. I'm all for tx over amps, but I prefer vintage. Rob K5UJ _______________________________________________
100 pins, meh, that is what ChipQuick (VERY low melting point solder) is for (Or cut all the leads away from the package, clean up and fit the new part, but ChipQuick is easier and faster). Quad flat
When I read some one wants to "integrate" the transmitter and the amp it means combine them. But be that as it may, if the amp is in a separate box the FCC will likely apply the current rules. If not