开云体育

Hi Tim, I completely agree with everything you said. We are in dire need of affordable, well performing kits for both bands! Some are not trying these bands due to the build from scratch and/or high

How are you measuring your power output? -- de K2TL.. since 1964

however you want to do it, just don't forget an old fashioned $0.1 fuse of a suitable value. Alan

Thank you all for the replies.? I did find this little board kit on eBay..The spec is for 56mv drop at 820ma, 13.4 volts.?

Tom, Unusual report for a QCX40. Did the RX alignment go as per the book, and have good performance? Perhaps double check soldering / component placement, especially around the LPF Check the

Bill, Take a look at page 93 in the QCX manual. You set the wspr power in menu 6.8. If you set the value to something other than the values listed in the manual, you will get that error. Mike M Ku4qo

Hi Paul, Agree with all your sentiments here, but linear amplification is nice to have and we do have some SSB activity on 630m here in VK. Not much, but some, and generally by agreement of the wider

Hi Paul, And herein lies the problem as you've stated... This is why I requested that 630m be added. I recently gave a presentation on 630m to my local ARC and while there was some keen interest, the

Into a dummy load only get 1 watt? Any suggestions on how to get 5 watts? -- Have a GREAT Day Tom KS5X@... --- This email has been checked for viruses by AVG. https://www.avg.com

My QCX-20 says i have a "WSPR power" error, but the GLQ is working.? What gives? Bill/AA2YV

Yes I am using it on the QCX.? I bought some SUP75803-07-E3 on ebay.? You ground the gate put power to the drain and output to the source.? With the FET like it is to be mounted on a heat sink the

Having worked with mosfets as rectifiers. As a parallel diode: Don't.? The part needs some amount of voltage from gate to source to turn it on hard. By then your stuff is fried. A good robust diode

Hello Jim I've used the circuit shown in this video in a small 70cm PA for DATV. https://youtu.be/IrB-FPcv1Dc The FET I used was an IPP80P03P4L04AKSA1. The max drain-source resistance when on is 7

JIm, The subject of using a MOSFET for reverse polarity protection was discussed on the RSGBtech forum about a year ago - I hadn't met this method of protection before.? One of the forum members

Has anyone used a MOSFET circuit instead of the schottky diode for power supply reverse polarity protection??? If so, whatwas the result in power output, and do you have a circuit to share??

Yup! Had the board upside down to unsolder the transistor and took the wrong one out. Doh!

There are times when I like to give my QRP QCX 20m transceiver a bit more power (QRO), and I do that with my small amplifier that I built from a kit from HFprojects. ? This amplifier is now offered

There are pros and cons both ways. If a transceiver doesn't have a separate receive antenna input then you have to do the antenna switching between RX and TX. This is easy if the transceiver provides

Hi, I recently built a QCX 40M. I also built a QLG1 GPS unit. Prior to calibrating with thew GPS, I would set the QCX to 7.117.00 but on my IC-7300 I would pick it up on 7117.35 (+/- a few Hz). After

Ha! Living up to your callsign, then! Only joking; it happens to all of us at times. 73 Alan