No worries Carl, take your time and get it fixed. I just got back from work so apologies, I did the tests last night at 2 am our time, if you follow along with my email you should result in a culprit

Hi Nigel, I had an email issue, and just got it corrected. Ok I will be spending the weekend working on the issue. Will check all voltages. 73’s iPhone Aloha -- CW

Ok Carl, Below is Adams picture with voltage readings in TX mode on my kit. We already established it works on receive. Now, I am assuming that your kit goes into TX, the relay clicks and the TX light

No worries Carl we all help each other, you will get your watt but not in the current setup but let's first find out why yours has no output. I'm suspecting first the tortoid in the finals since you

Hi Nigel, Yes, I am only chasing an output up to a watt. I will not becc by able to measure my output with B any degree of accuracy for a couple more days. If it is just a bad 139, that would be

Carl, I will measure mine at the weekend to give you a ball park. My suggestion is check again your final tortoid and if you need more power out I would use the finals as a driver for a parrallelled

Hi TE Fid, All excellent. I have ordered Phillips BD-139 and will build a dummy load and measure output with both devices. I explored the Toroid site, looks like a lot of interesting projects and a

https://www.mouser.com/datasheet/2/268/2N4427-1593496.pdf Carl , this device is also avail frm the chap I mentioned to you. This has a guaranteed power gain of 10 dB at 175 Mhz which is of no

sorry I mentioned the IRF 510 in passing as it has the same issue - the VIshay brand ones work well but some others are duds - after all it is a SMPS mosfet that just happens to work at RF . It is a

Tim, is the IRF510 a direct sub for the 139? If so what is the difference and are any additional mods required for the 20m? iPhone Aloha -- CW

Take care , not all BD139s are created equal. I Believe the Fairchild Stamped ones are reliable as RF amps and some others are not. The die designs vary between Mfrs. Same applies for the venerable

Yes, it’s transmitting but virtually no power. iPhone Aloha -- CW

I assume that the transmit light does illuminate properly. Because the wattage is low, I placed my oscilloscope probe with a 10X on the antenna output. On the software I pushed the TUNE control.

Thanks Jim. I am suspecting a bad BD139. They are cheap, I will do some measurements with the existing one and a new one. After that I have no idea what to check. After several examinations on top,

Measure the voltage on an oscilloscope and calculate the power from that. Or make a diode peak detector and calculate the power from that.

Hi Conor, Yes, I carefully scraped the coating off. I tested each coil before as well. To be sure I just took the pcb out and under 30x checked each solder joint as well as all coils. To be sure again

Hi Carl, I had a similar issue with one of my D4D kits: I wasn't being spotted on pskreporter with one transceiver, but my other transceiver worked great. The problem for me was the solder joints

Hi, I just sent a 1 watt CQ on 20 with my other QRP and had a QSO with a Washington State from my Minnesota QTH. I also confirm PSKreporter from several coastal states. So it’s just the difference

Tem that sounds about right, it's well down from 40 I know that much but still workable, I'm surprised Carl got nothing on the return reporter, maybe conditions? Kia Kaha

Its hard Carl at those levels to measure accurate and I don't know of any commercial cheap gear that can do it unless you build it yourself. Well, it sounds like all is not lost yet. Remember the