Hello Ebnauters Would a KiwiSDR (which I do not own but was thinking of buying) have adequate LF frequency stability for Ebnaut reception given it uses 1PPS from a GPS receiver to stabilize the frequ
Hi EbNaut I think that using expensive receivers is NOT the way to go. I'm using a simple mixer as downconverter. The LO is 120KHz generated from a uBlox GPS. So the 137KHz outputs as 17KHz and can b
Hi Luis, LF, I agree, this is indeed the most reasonable design. Using the same here ;-) but a 125 kHz LO, locked to GPS. Maybe we should provide easy converter crcuits. A compromise between high end
Hello Markus, Thanks to you and all who have replied so far. I have a thought. My TS-590S has this GPS locked LO fitted, would this allow me to use the 590 for Ebnaut RX ? The kit is now no longer av
Hi Stefan, Luis, LF EbNaut, There are several who believe the converter circuit approach is a viable path to EbNaut RX capability. I think three things are needed at this point: 1) Circuits 2) Identi
Hi Stefan, Luis, LF, Yes, yes! Please grab some paper and start drawing those circuit diagrams! ;-) The non-engineers have many questions... If I understand this correctly... with the NEO-M8T then I
If using an untuned loop or e probe antenna (any untuned antenna for that matter) you'll want to include a front end filter to remove the image. Even if there are no signals at the image frequency y
I agree 100%, Rob. To me items 1 and 2 are the most critical up front. A mistake configuring free software is minor compared to a mistake buying the wrong hardware. The latter could mean long delays
Hi Paul, Am 19.12.2018 13:00, schrieb N1BUG: Hi Stefan, Luis, LF, Yes, yes! Please grab some paper and start drawing those circuit diagrams! ;-) No problem. I've drawn the circuit years ago. But the
Question: I have a homebrew receiver with I and Q outputs that I built some time ago. It has a 10 MHz input which is divided down to 125 kHz, and my old HP GPS receiver is still working fine. It woul
Hi John, In SpecLab there is an option to remove the PPS peak from the signal. So the right channel can be used for a radio signal as well. I didn't use that option so far but at DL0AO they did. Mark
Hi EbNaut My downconverter is based on NE602 and is crude simple. No filters, no gain stages. A bit deaf and birdie-rich but wanted to test it that way for EbNaut and check if it works. It is based o
Hello Luis A link to which Ebay supplier you got the correct Ublox units from would be great, I believe these are a bit of a mine field with fakes and various specs abounding :) Thanks! -- Best regar
Yes, a band filter in front of the mixer and then an image rejection filter on the AF side. Thus it is better to use an LO frequency of 125 or 120 kHz rather than 135 kHz because filtering will be ea
Hi Chris Cheap mines anyway :-) As Stefan mentioned. Paul Nicholson published a reliable source, but more expensive than the average I'm using a LEA6-T purchased few years ago in a development kit. M
Hello The Net: Which specific UBLOX GPS model is best for NMEA output, 1PPS, and the unmodulated auxiliary RF output? I hope all have the very best of this Holiday Season. Stan, W1LE Cape Cod FN
Hi Luis, I don't understand this yet. I thought the cheap LEO-6M, LEO-7M and LEO-M8N can supply LO or 1 PPS but not both at the same time? So for RX don't we need two of them? Then another one for TX
Hi Stefan, Thanks for showing us your TX converter circuit. That is a bit more complicated than I was expecting which goes to illustrate my point about why diagrams are so important. I thought you me
Hi Paul Yes. uBlox GPS's can supply TWO clock outputs at the same time. Independent and configurable You need only one GPS for the Rx. One output to LO frequency (120 or 125KHz) and the other to 1Hz
