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Easy 20 Watts with any qrp

#bitx40

Lawrence Galea All Messages By This Member #100681 Awesome 24000km record QRP QSO to VK4KA toggle quoted message Show quoted text On Sun, Mar 26, 2023 at 4:13?AM AndyH <awhecker@...> wrote: Sorry...let's try this again. I hate working on a phone. Dan - I live on a sail boat. A couple of meters of tinned braid tossed over the side, a shortened 40 meter vertical, and 8 Watts from my uBITX V6 is all I need for a reliable Winlink connection across the Gulf of Mexico to Brownsville, TX for email and wind data. I know for a fact that I don't "need" 20W or even your suggested 50 W to do what I need to get done. No sir - everybody does not "need" 50 or more Watts.? You do you - enjoy your QRO gear!? There is no "reason" to build our own gear? There is no "reason" for the Amateur service either, I guess. That's not going to stop me from building, or continuing to learn how to build amplifiers. That's precisely why I got this ticket, after all. Best, Andy, KG5RKP/MM On Sat, Mar 25, 2023 at 01:55 PM, Dan Eggers N7DE wrote: 20 w is -7 dB, and that is too far down.? it is getting close to -10 dB down.? You need to be at 50 w, and that is only -3 dB down.? What I have used for low cost has been an MRF455 in an EB63A board from Communications Concepts, and it works very well. ? However, the Chinese are selling a 100-w amplifier with a heatsink that has had the level set, and they also sell a lowpass filter board XDT LPF200 for 3 - 30 MHz at a reasonable price that works very well, so these days there really isn't any reason to "build your own" amplifier.? ? The main thing I am saying is that you need more power so that you can be heard.? I went through enough Electrical Engineering courses that I am now an Electrical Engineer, but I do not think I am going to try design amplifiers from scratch myself. ? I am very grateful for all of the people who helped produce the UBITX 6, because I think that has been the only low cost real general coverage transceiver that is out there.? ? ? ? ? ? ?73, Dan, N7DE ? From: [email protected] <[email protected]> on behalf of Sunil Lakhani <vu3sua@...> Sent: Friday, March 24, 2023 1:19 AM To: [email protected] <[email protected]> Subject: Re: [BITX20] Easy 20 Watts with any qrp #bit40 ? Hi Ted Thanks. Incidentally the FET is? IRFP150? And Not IRF150 , sorry for the typo. I will edit at the end of the video.. The FET i have used is Harris IRFP 150 It works great with not much heat at 35 V . Regards Sunil vu3sua
Lawrence Galea All Messages By This Member #100682 I also had SSB/CW QSOs with the uBITX 3 and am waiting for some parts to finish my uSDX. Fun to work with QRP although I also have a G2DAF exciter and G2DAF linear, both home brewed built a long time ago apart from some other commercial equipment. Enjoy whatever you like and make the most?of it Regards to all Lawrence toggle quoted message Show quoted text On Tue, Mar 28, 2023 at 3:31?PM Lawrence Galea via <9h1avlaw=[email protected]> wrote: Awesome 24000km record QRP QSO to VK4KA On Sun, Mar 26, 2023 at 4:13?AM AndyH <awhecker@...> wrote: Sorry...let's try this again. I hate working on a phone. Dan - I live on a sail boat. A couple of meters of tinned braid tossed over the side, a shortened 40 meter vertical, and 8 Watts from my uBITX V6 is all I need for a reliable Winlink connection across the Gulf of Mexico to Brownsville, TX for email and wind data. I know for a fact that I don't "need" 20W or even your suggested 50 W to do what I need to get done. No sir - everybody does not "need" 50 or more Watts.? You do you - enjoy your QRO gear!? There is no "reason" to build our own gear? There is no "reason" for the Amateur service either, I guess. That's not going to stop me from building, or continuing to learn how to build amplifiers. That's precisely why I got this ticket, after all. Best, Andy, KG5RKP/MM On Sat, Mar 25, 2023 at 01:55 PM, Dan Eggers N7DE wrote: 20 w is -7 dB, and that is too far down.? it is getting close to -10 dB down.? You need to be at 50 w, and that is only -3 dB down.? What I have used for low cost has been an MRF455 in an EB63A board from Communications Concepts, and it works very well. ? However, the Chinese are selling a 100-w amplifier with a heatsink that has had the level set, and they also sell a lowpass filter board XDT LPF200 for 3 - 30 MHz at a reasonable price that works very well, so these days there really isn't any reason to "build your own" amplifier.? ? The main thing I am saying is that you need more power so that you can be heard.? I went through enough Electrical Engineering courses that I am now an Electrical Engineer, but I do not think I am going to try design amplifiers from scratch myself. ? I am very grateful for all of the people who helped produce the UBITX 6, because I think that has been the only low cost real general coverage transceiver that is out there.? ? ? ? ? ? ?73, Dan, N7DE ? From: [email protected] <[email protected]> on behalf of Sunil Lakhani <vu3sua@...> Sent: Friday, March 24, 2023 1:19 AM To: [email protected] <[email protected]> Subject: Re: [BITX20] Easy 20 Watts with any qrp #bit40 ? Hi Ted Thanks. Incidentally the FET is? IRFP150? And Not IRF150 , sorry for the typo. I will edit at the end of the video.. The FET i have used is Harris IRFP 150 It works great with not much heat at 35 V . Regards Sunil vu3sua

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