开云体育

Hi Hans I am building a 50W PA and long story short I have one of the 1K 1 W resistors missing. I dont need a replacement from QRPlabs at this time. (If this eventuates I will request it as part of

I believe it is to slide under an IC that you are unsoldering so you can lift it off the board. 73 Don ve3ids [email protected]> wrote:

Decided to use the QMX SWR Sweep to tune a new 15m EFHW.? Somehow blew the receiver audio again. Last time it was IC402 - This time?? (Off to Jeff Moore on Monday...) All sweeps into

Hello all, I just purchased my first hot air rework station.? ?It is a Yihua 959D, Amazon Prime Day deal. It appears to be well made and well thought out. It came with a few different size

Hi Uwe Both the PTT and AUX will be able to get used as serial ports. And controlled by BASIC scripting. It will do everything you want. But not yet... 73 Hans

Build my QMX+ last month. It works with no problems in CW and digital (WSJT-x). Now I nedd a second serial port for controlling my Magloop. (automatic Loopcontroller from TF3LJ). I find not much

I picked up a Inui B42 power bank, a DSD Tech 9v trigger cable and a Soundcore mini speaker on Prime day. I've been running the power bank since Thursday afternoon (36 hours) and only used 20% of

Zhenxing - I kind of figured someone else had the same though.? Your description of a "paddle emulator" is PERFECT! The "keyer programmer" was the EXACT scenario I was thinking of when I first

Ah.? Just checked both my QMX high band and QMX+ and both show approx 30ma Bias Current and 15-16% Bias Duty Cycle on the Transmit tests.Both are powered from a 12 V source.? Now... Having said

The driver will not open the RD. Need a level converter -- 73, Oleh, UY2ZA

Mild aside, there are dedicated solutions for accurate GPS disciplined time... https://github.com/opencomputeproject/Time-Appliance-Project/tree/master/Time-Card I don't think Hans needs to change

I use a 12V UPS run by 2x 18650. These have a 5V USB socket which you can connect to a charger or pc. Mine runs 24/7 with no problems.? ?You can get these UPS from online sources for just a few

You first need to confirm it's not RF feedback. Replace the antenna with a proper dummy load and run everything. If the PC now behaves then the problem will be RF feedback/pickup.

This is a curly one. My QMX's - Both Hi & Low band, have suddenly decided they do not like 20M. The antenna is 1.45:1 on the Hi Band QMX SWR sweep. (and 1.40:1 on the Low Band) I have disabled SWR

The Xeigu G90 uses RD16HHF1 (Mitsubishi) and I need to order some (ours failed) but in this context have these devices been considered as PA for any of Han's excellent designs? I know it is a very

Just out of curiosity, did you press Capital 'P' and/or Capital 'T' in the hardware test Putty screen? You can and should hold down either of those two keys for a few seconds and see what is shown on

*I I I I I ? ? I finally learned how to use puddy.* *I changed all four bs170’s with no improvement… So it’s not the finals.* *I checked all the obvious things. if everything was correct it

Mark, Some more information in this thread. /g/QRPLabs/message/102702 I liked Ron’s approach, have been building all my 50WPA for 10m and using them on other bands, down to 160m,

I have used copper-filled thermal vias on high power microwave boards, under the active devices.? It is a costly process. 73, Don N2VGU