Hello Larry I suspect you intended that email for me personally not for the public QRP Labs group - either that, or something about the word "confidential" was seriously lost in translation - If so pl

Hi all The 10uF capacitor isn't necessary with a 78M05. 73 Hans G0UPL http://qrp-labs.com

#qcxmini

Hi all The 25MHz TCXO modules for QCX+, QCX-mini and other uses http://shop.qrp-labs.com/qcxptcxo were previously made of 0.8mm single-sided PCB without through-hole plating. The single-sided PCB pads

Hi all Yesterday afternoon, a large shipment came and we are now able to fulfil quite a large number of pending orders that were waiting for TCXO, Ultimate3S, VFO, Clock and Relay-switched LPF kits. S

Hello Laszlo Engineering is also about compromises to meet certain targets. In the case of QCX, the targets are high performance and low cost. For QCX-minj, small size also. It was an acceptable desig

Hello Mont, all A reminder that curing drift on an Ultimate3S is possible, at least to a large extent, by other methods than a TCXO - and that this was described in an age old App Note I wrote back in

#u3s

Hi Fred I don't want to sound overly defensive here but... the AMS1117 datasheet I read said 18V maximum. At that time I didn't realize there were multiple AMS1117 some of which have 15V max rating. E

Gentlemen, There are a lot of happy users of the QCX-mini, and overall the new kit has generated a lot of excitement. At the same time, there are also some people who have had problems due to shortcom

Hello Mont No! I am referring to the TCXO used in the QCX+/QCX-mini module http://shop.qrp-labs.com/qcxptcxo - this is the one carefully tested. No, I did NOT... the text says "a possible part" not "a

#u3s

Hi all Some photos attached, the assembled boards were completed today (see attached). They will now be shipped to me and expected to arrive here in about 2 weeks (taking into account customs clearanc

Hi Sarma All members of the Si5351A family can accept external input in the range 25-27MHz, including the A-B-GTR (equivalently A-B-GT) that is used in all the QRP Labs kits). The QRP Labs TCXO module

#u3s

Hi all Remember that many low cost TCXOs use some kind of digital method of frequency compensation and they actually jump in steps of a few Hz at a time, which can be an issue for WSPR. Of course the

#u3s

Hello Wolfgang On QCX you can switch on "unsolicited notifications" and you can configure it, via CAT, to send you a notification that decoded character(s) have been added to the buffer. This way no p

Hello Dan Yes. Because the QSX is not so limited on microcontroller pins as the QCX 73 Hans G0UPL http://qrp-labs.com

Hi William There were a very large number of orders in December... and other kits than QCX-mini also ran out. We've been waiting for more PCBs to arrive. I'm not sure what your order ID is but we ran

Hi all Just to be clear... I am not suggesting that anyone with an AMS1117 in their QCX-mini change it to 78M05. There is no widespread universal problem here. As long as the 10uF capacitor is at the

Hello John The QRP Labs VFO kit is only compatible with the Si5351A Synth kit (included in the VFO kit). It isn't compatible with the AD9850 DDS module. 73 Hans G0UPL http://qrp-labs.com

Hi Ken Yes, you can string together CAT commands to QCX. At least, within reason (QCX doesn't have enormous storage buffers). 73 Hans G0UPL http://qrp-labs.com

Hi all In the first QCX firmware versions supporting CAT you could type one character at a time. But remember, the CAT port is shared with the LCD data pins. There were issues with this conflict and s

See also http://qrp-labs.com/qcx/qcxmods/qcxvolume.html

#40m #qcxmini