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SMD or through hole regular ?

Hi Shirley: I haven't looked at the RP or its specs for a long time, and did not know it was running at that speed. I did notice during his talk that Farhan is using C for development, but there's a

I'd guess that the sBITX isn't getting anywhere near 100% CPU or GPU utilization. Cooling the SoC on the board is only an issue if you do.

I run the sbitx all the time. It keeps scrolling the wsjtx callsigns. What does get hot is the 2 dollar switching regulator. It doesn't have a heatsink. I am planning to build a proper one with a

He's using a Raspberry Pi 4. That's four Cortex-A72 cores clocked at 1.5 GHz maximum out of the box, and it can be overclocked to 2 GHz if need be. Plenty of processing power, and the multiple cores

My understanding is that all of the presentations will be posted within the next couple of weeks. Jack, W8TEE

hi, Does anyone have a recording of this talk? I've been crazy busy lately and just found about it today. Regards Rafael, PU1OWL

It was the closest that I have ever gotten to FDIM. I was able to watch all of the forums and can't say that there weren't any that I didn't enjoy. I learned a lot of new stuff and got a bunch of

Hi Trystan: My problem was that at the last moment I change from my house to Al's for the presentation. My office is in the basement and the extender I'm using started causing the Internet connection

Farhan, Ultimately I'd go to some of the big HF rigs service manuals and check how they internally regulate the voltages. The IC7300, for example, uses a TPS62110 from Texas Instruments, but that is a

Hello >Jerry, Thank you for your information I also found a link in French that explains how to sort Quartz with spreadsheet. F8EOZ ? Blog Archive ? Transceiver CW 20 m – Filtre à quartz –

A number of years ago I worked for a Microwave module company. We used to use a spread spectrum technique for our switchmode local supplies. We also used to put DC modules in a shielded box and used

Also test if the uBITX works 'stand alone' without the USB cable plugged in. Is this a situation of everything was untouched and just not powered, or 'picked up the bench' and detached cables?

LM2576S-5.0 does 3A, robust and well proven....52 kHz Fixed Frequency Internal Oscillator

Jack, I really felt for you when you couldn't find your slides, then after you found them you couldn't share your screen. Then the summary table was all blacked out. Argh! Your talk was very good,

The LM2575 has just 1 A rating. we need 3A <criradul2001@...> wrote:

Hi Ashhar, I would suggest the LM2575 SMPS chip. I used it many times and it seem quiet on SW bands and it will sustain 2-3 amps easily. The schematics is simple and uses few components, a 330

thanks, charu. onto it. - f wrote:

Also take a look at LM1804 de vu2upx _._,_._,_

I would recommend following the design notes in the chip documentation when selecting an inductor.? Once you have things working well, you can try winding your own. Much of the emphasis today is on