开云体育

The 3D STL mount file and wiring diagram is on our Discord server :)

The file to verify is in /boot/firmware.? It is config.txt.? Attached is a copy that works for me: 73 Evan AC9TU

Thanks Evan, so far I have not been able to disable vc4hdmi0 and vc4hdmi1. how did you do it? pi@sbitx:~ $ aplay -l **** List of PLAYBACK Hardware Devices **** card 0: vc4hdmi0 [vc4-hdmi-0], device

My last sad experience shows that a possible extension could be a temperature sensor (with range up to 150 or 200 Celsius) placed on the heatsink near to MOSFET. The software could then limit or swich

JJ- Excellent work on the improvements with V4.4. CW is much more responsive and the full spectrum option (elimination of the decoder screen) is absolutely SUPER! It could be made even better with a

A diagram ( documentation ) of mounting the INA260 Power Sensor thanks

Works great!

I already ordered AlN insulators from Aliexpress. They should arrive in two weeks. 73, Wojtek SP5DAA

That’s great news! I would strongly suggest switching to the aluminum nitride insulators Gordon kx4z

Yep, at least I had a bit of foresight and ordered a few more pairs of IRF510s. I'm going to pick it up again tomorrow. I've found that in cases like this, more than a few hours and I start to get

Yes! Replacing the MOSFETs fixed my sBitx v3. So I have learned two lessons: * Running continuously in FT8 mode requires either reducing DRIVE or using a fan to improve cooling MOSFETs (especially if

So typically what you do there is unsolder the drain on each MOSFET and just disconnect it so that you can stop those from potentially taking all the current and then see if you still have the direct

ConstructionManual PDF Document · 1.4 MB

Well, the reverse voltage or whatever happened might have fried the MOSFETS

https://www.qsl.net/nf4rc/2021/PolarityProtectorPartOne.pdf

Yes, so I've removed D7, I have a direct short to ground, somewhere. I haven't even thought of plugging a pi into it since this began. Right now, even if I apply only 2-3v, the fat trace running from

Gordon - do you have the circuit diagram for that protector? Gerry Sherman Sent by the Windows 11 Thunderbird

If you have a current limited supply at about 2Amps OR a variable voltage supply, Then you could do a preliminary test after replacing D7 so you again have SOME reverse polarity protection. We

Not sure, I must have inadvertently applied 12v somewhere I shouldn't have. Either way, I doubt that I can check any further damage until I replace D7. Probable worst case would be having to drop $40

Michael, how did D7 get damaged? Was reverse polarity applied to the radio at some point? that would be the most likely way to damage D7 and it would have serious impacts on some of the other