Re: QRP Labs - QDX Digital Transceiver
Geplaatst: 19 nov 2021, 17:23
Pagina 3 van 4
Re: QRP Labs - QDX Digital Transceiver
Geplaatst: 19 nov 2021, 22:04
Ergens een aardlus?
Re: QRP Labs - QDX Digital Transceiver
Geplaatst: 26 nov 2021, 11:29
Volgens het QRP Labs forum moet dat met een upgrade naar de laastte firmware versie verholpen.
Zie de site van QRP Labs.
Zie de site van QRP Labs.
Re: QRP Labs - QDX Digital Transceiver
Geplaatst: 01 dec 2021, 20:45
Na 2 weken wachten, voordat de douane mijn pakket vrijgaf, heb ik hem vandaag eindelijk binnen. Het bouwen kan beginnen.
Re: QRP Labs - QDX Digital Transceiver
Geplaatst: 15 dec 2021, 20:26
Voor geïnteresseerden
QDX batch 2 sales will be opened (stock on this page, available to order) at 1800 UT on Friday 17-Dec-2021 http://shop.qrp-labs.com/kits/qdx
Incl revisions (from groups.io)
---------------------------------------------------------------------
QDX batch #2 sales will commence at 1800Z on Friday 17-Dec-2021, at http://shop.qrp-labs.com/qdx
QDX batch #2 is 375 kits. Some of these have to be allocated to batch 1 leftovers due to the QRP Labs shop over-selling in last few seconds of the frantic 14 minutes on 11-Oct-2021. There are also several promises to be fulfilled and various other special cases. So the actual number that will be available for general sale will be a bit less than 375. The QRP Labs server has been upgraded to a higher performance machine and so maybe we won't see the same overload issues as last time.
Regrettably, I have to announce a price increase from $60 to $65. The original batch 1 QDX kits were manufactured in January 2020, a whole different world ago. Unfortunately many aspects of the manufacturing and logistics have increased in price. Even the main microcontroller chip STM32F401RBT6 procurement cost me in excess of $5 extra now, compared to the price in January 2020 before the global semiconductor shortage crisis hit. Just check Digikey, Mouser, Arrow etc., and you'll begin to understand the difficulty of finding these at all, at any price. And this is just ONE part of the QDX. So I have no choice, but to pass some part of the cost increase on, by increasing the price of the kit; $65 is the best I can do at this time. The price of Aluminium has also seen large increases since batch 1 and this has affected the manufacturing cost of the enclosure too; however at this time I am not increasing the price of the QDX enclosure. I ask for your understanding on this small increase and let's all hope for better days in the not too distant future.
QDX batch #2 has a new Revision 2 PCB. In particular, Rev 2 PCBs no longer need the four 47uH SMD inductors to be replaced with through-hole components, nor do they need the 220uF capacitor at the DC input, nor do they need the 25MHz TCXO daughtercard installation. So the assembly is easier to do. The full list of changes for PCB Rev 2 is as follows:
The SMD pullup resistors R5, 10, 11, 12 and 14 that pulled up MOSFET gates to +5V were deleted, as they were not necessary.
QDX batch 2 boards will be supplied with firmware 1.03 ready installed (which will be made available for download shortly), which drives 5 I/O pins in Push-Pull mode rather than Open-Drain mode, this is required to be compatible with the pull-up resistor removals mentioned above.
L1, 5, 7 and 9 (47uH SMD) have been replaced with through-hole axial molded inductors that are installed in the PCB properly, like all other through-hole components, rather than tacked on the bottom as a modification.
IC2 (5V regulator) has been replaced by 78M05 which is a very robust regulator and this removes the need for the added 220uF capacitor. Additionally IC1 (AMS1117-3.3), the 3.3V regulator, is now powered at 5V from the 78M05. It is therefore working much less hard with only a 1.7V drop.
The 25MHz TCXO, decoupling capacitor, and coupling capacitor are no longer on a separate tiny TCXO daughtercard; they are now SMD components installed directly on the underside of the board by the SMD assembly factory.
A P-channel MOSFET is added at the DC input socket as reverse polarity protection. The device used is AO3407. It is rated 4.1A and has a specified typical ON-resistance of 34 milli-ohms. At 1A (say) on a 9V QDX the voltage drop will therefore be 0.034V which is of little consequence.
A potential divider circuit added to bias the BPF switch IC3 at mid-rail; this was neglected in the original and does not seem to cause any issues but perhaps in the case of very strong signals, could have a few dB impact on dynamic range.
IC7 has been moved a little further from the board edge following some reports that it could conflict with the PCB rail in the aluminium extrusion; this seems to be a manufacturing tolerance thing since I did not see it on my builds here, but it did affect some people.
Please let me know any comments or questions.
73 Hans G0UPL
------------------------------------------------------------------------------------------
QDX batch 2 sales will be opened (stock on this page, available to order) at 1800 UT on Friday 17-Dec-2021 http://shop.qrp-labs.com/kits/qdx
Incl revisions (from groups.io)
---------------------------------------------------------------------
QDX batch #2 sales will commence at 1800Z on Friday 17-Dec-2021, at http://shop.qrp-labs.com/qdx
QDX batch #2 is 375 kits. Some of these have to be allocated to batch 1 leftovers due to the QRP Labs shop over-selling in last few seconds of the frantic 14 minutes on 11-Oct-2021. There are also several promises to be fulfilled and various other special cases. So the actual number that will be available for general sale will be a bit less than 375. The QRP Labs server has been upgraded to a higher performance machine and so maybe we won't see the same overload issues as last time.
Regrettably, I have to announce a price increase from $60 to $65. The original batch 1 QDX kits were manufactured in January 2020, a whole different world ago. Unfortunately many aspects of the manufacturing and logistics have increased in price. Even the main microcontroller chip STM32F401RBT6 procurement cost me in excess of $5 extra now, compared to the price in January 2020 before the global semiconductor shortage crisis hit. Just check Digikey, Mouser, Arrow etc., and you'll begin to understand the difficulty of finding these at all, at any price. And this is just ONE part of the QDX. So I have no choice, but to pass some part of the cost increase on, by increasing the price of the kit; $65 is the best I can do at this time. The price of Aluminium has also seen large increases since batch 1 and this has affected the manufacturing cost of the enclosure too; however at this time I am not increasing the price of the QDX enclosure. I ask for your understanding on this small increase and let's all hope for better days in the not too distant future.
QDX batch #2 has a new Revision 2 PCB. In particular, Rev 2 PCBs no longer need the four 47uH SMD inductors to be replaced with through-hole components, nor do they need the 220uF capacitor at the DC input, nor do they need the 25MHz TCXO daughtercard installation. So the assembly is easier to do. The full list of changes for PCB Rev 2 is as follows:
The SMD pullup resistors R5, 10, 11, 12 and 14 that pulled up MOSFET gates to +5V were deleted, as they were not necessary.
QDX batch 2 boards will be supplied with firmware 1.03 ready installed (which will be made available for download shortly), which drives 5 I/O pins in Push-Pull mode rather than Open-Drain mode, this is required to be compatible with the pull-up resistor removals mentioned above.
L1, 5, 7 and 9 (47uH SMD) have been replaced with through-hole axial molded inductors that are installed in the PCB properly, like all other through-hole components, rather than tacked on the bottom as a modification.
IC2 (5V regulator) has been replaced by 78M05 which is a very robust regulator and this removes the need for the added 220uF capacitor. Additionally IC1 (AMS1117-3.3), the 3.3V regulator, is now powered at 5V from the 78M05. It is therefore working much less hard with only a 1.7V drop.
The 25MHz TCXO, decoupling capacitor, and coupling capacitor are no longer on a separate tiny TCXO daughtercard; they are now SMD components installed directly on the underside of the board by the SMD assembly factory.
A P-channel MOSFET is added at the DC input socket as reverse polarity protection. The device used is AO3407. It is rated 4.1A and has a specified typical ON-resistance of 34 milli-ohms. At 1A (say) on a 9V QDX the voltage drop will therefore be 0.034V which is of little consequence.
A potential divider circuit added to bias the BPF switch IC3 at mid-rail; this was neglected in the original and does not seem to cause any issues but perhaps in the case of very strong signals, could have a few dB impact on dynamic range.
IC7 has been moved a little further from the board edge following some reports that it could conflict with the PCB rail in the aluminium extrusion; this seems to be a manufacturing tolerance thing since I did not see it on my builds here, but it did affect some people.
Please let me know any comments or questions.
73 Hans G0UPL
------------------------------------------------------------------------------------------
Re: QRP Labs - QDX Digital Transceiver
Geplaatst: 01 mei 2022, 19:31
De 3e batch van de QDX is vanaf 18:00Z vandaag te koop via : https://shop.qrp-labs.com/qdx
Beschikbaar om 18:30Z : 1244 beschikbaar van de initiële 1870.
Beschikbaar om 18:30Z : 1244 beschikbaar van de initiële 1870.
Re: QRP Labs - QDX Digital Transceiver
Geplaatst: 02 mei 2022, 12:47
Dank voor de melding. Vandaag, 2 mei 13:30 lokale tijd, waren er nog meer dan 700 beschikbaar gelukkig. 
Betaling met de creditcard lukte mij helaas niet, wel met PayPal. Wel aanvinken dat je beseft, dat het nog even kan duren voordat de bestelling afgeleverd wordt.
73, Nico
Betaling met de creditcard lukte mij helaas niet, wel met PayPal. Wel aanvinken dat je beseft, dat het nog even kan duren voordat de bestelling afgeleverd wordt.73, Nico
Re: QRP Labs - QDX Digital Transceiver
Geplaatst: 02 mei 2022, 22:01
Leuk! Ook een kunnen bestellen.
Re: QRP Labs - QDX Digital Transceiver
Geplaatst: 08 mei 2022, 20:54
Ok, ik mis dus ook de handigheid om dit in elkaar te zetten. En toch wil ik 'm wel graag. Iemand die er 2 in elkaar kan/wil zetten? Een voor zichzelf en 1 voor mij ? Dan bestel ik er 2 op mijn kosten! Niet allemaal tegelijk roepen 
Re: QRP Labs - QDX Digital Transceiver
Geplaatst: 08 mei 2022, 21:34
Ik wil best wat soldeer werk voor je doen....
Re: QRP Labs - QDX Digital Transceiver
Geplaatst: 08 mei 2022, 22:42
De nieuwe handleiding voor Rev3 is gepubliceerd : http://qrp-labs.com/qdx
Re: QRP Labs - QDX Digital Transceiver
Geplaatst: 11 mei 2022, 18:05
Voor diegenen die nog twijfelen. Op dit moment zijn er nog 43 beschikbaar. De voorraad slinkt gestaag. Met de huidige snelheid duurt het nog hooguit een paar dagen voordat alle exemplaren verkocht zijn.
Re: QRP Labs - QDX Digital Transceiver
Geplaatst: 21 jun 2022, 20:46
Afgelopen maandag een paar keer mijn nieuwe QDX gebruikt en aan mijn QDX-pagina op mijn website gewerkt:
https://ph2lb.nl/blog/index.php?page=qrp-labs-qdx
Moet nog even meer tekst en meet resultaten toevoegen.
https://ph2lb.nl/blog/index.php?page=qrp-labs-qdx
Moet nog even meer tekst en meet resultaten toevoegen.
Re: QRP Labs - QDX Digital Transceiver
Geplaatst: 21 jun 2022, 21:04
Mooi opgezet Lex.
Wat bedoel je je aan het eind met een Raspberry voor WSPR?
Wat bedoel je je aan het eind met een Raspberry voor WSPR?
Re: QRP Labs - QDX Digital Transceiver
Geplaatst: 22 jun 2022, 08:55
Ik wil met een raspberry pi (icm WSJTX) een WSPR monitor die permanent aanstaat en daarbij de miniwhip gebruikt die ik op het dak heb staan (minus natuurlijk de momenten dat ik HF uit kom).