开云体育

Perfect, thanks Tony ! I'll stick to your advice. 500mw seems like a good power to play with. I like the idea of having just a bit more power in order to give a bit more advantage in discovering

My recommendation if you want to operate with more power would be NOT TO USE THE 2N7000. Instead, fit two BS170 fets. They are very cheap and have a much higher dissipation. IMPORTANT - the

Hello Steve, hello Hans, many thanks for the replacement of the too slow chips. In the meantime I have got a GPS also, so there is only an antenna missing. The new chip seems running correct. But I

Greetings all ! I've just placed my order for the latest Ultimate QRSS kit, mainly to use on WSPR but I'm sure I'll play with the other modes eventually. My plan is to use two of the 2N7000's at a

hi guys, I have noticeded a couple of you are still having problems. I will ship replacements which i will test on my own beacon first to verify that they work when they leave me. This wont happen

Hi to all members, I have received the ATmega V1,6 (thanks Steve) and have inserted it the correct way round but there is nothing on the display (totally blank) when I insert the old chip the display

Hi, I have finished modifying my 30 meters QRSS kit into a WSPR autonomous beacon using a TI Launchpad with MSP430G2553 (4,6 USD micro-controler kit). Here some pictures and more details (in french

Hi Hans,Steve, Today the new processor arrived, I installed it and everything works well. Setting up is a breeze now. Still don't know how the eeprom got corrupted. Now on to the GPS module, I m

I hope you've had some success but a sideways look at this might suggest you could have replaced the first failed PAs with 2N7000 and installed them as BS170. You do say that this happens

Have you measured the output voltage of the 7809? The fact that the problem doesn't happen when the higher voltage is applied to the PA suggests to me that there may be an issue around the regulation

What load are you using for the PA output?

Tony, Sorry to hear your bad luck. As has already been said, if you are using BS170s as a replacement for the 2n7000 they fit the opposite way around. But I am sure you won't have made that

The two BS170's are installed correctly (180 degrees compared to the original 2n7000). I have had them in the kit for over a month and it's been working more or less 24hrs a day since with no issues

You say you replaced both transistors in the kit; as only one is supplied originally you have replaced them as 2N7000? or not by chance with BS170? .Their configuration does not follow the PCB

Hi all, I built my 30m Ultimate QRSS kit over a month ago and it's been working fine until last night. When I unplugged the kit and plugged it back in again after about 15 seconds I heard a pop and

Will do Philip, Thanks for the idea, I will start the DVM/Circuit diagramme tests tomorrow. 73 Colin

Colin Any chance of posting (in photo album on here) a decent quality photo of top and bottom of your board so a few more fresh eyes can have a look for you assuming you don't spot the

Thanks for your post Steve, yes I know you are Steve I am not having a Senior Moment (I hope not or am I) ;o) I was replying to that Serling Chap Philip G4JVF, who told me he also hat problems with

Colin, I probably did not make myself clear in the previous post. If the seconds are going up by 1 every 8 seconds then you have a faulty chip which I will replace FOC. You can tell this by setting

Hi Philip and all other members, I have not found any solder splashes or other mistakes on either side of the PBC, this is something I will now have to check with the circuit diagramme and multimeter