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Exactly what I would expect. Interesting that RD2 is not on the schematic. I'm befuddled as to what is happening with my PCB. I should have 11.xx v on either side of LD6. Even more so with the list of

Hi Rob, I measured my v3 mic input at 11.6 volts with a 12-volt supply, and no mic was connected. Here is the picture of the preamp area: RD2 is not there. If you want a different bias value,

Well, there ya go! change that resistor to get the bias voltage you prefer and you should be in business!! I didn't have that (to my knowledge) in any radio I have worked on, and I added resistors

RD2 ? I do not see this resistor on the schematic ( https://github.com/afarhan/sbitx/blob/main/sbitx_v3_production.pdf ) and appears to be in parallel with C29. That would make your answer correct. It

I think everyone needs to take a deep breath and recognize a few things. 1) This is new product, and to expect military precision for its release does not seem reasonable, especially with a smaller

Please don't confuse a labor of love by a fellow HAM with a large company's professional product. I am appreciative of the development of this very innovative,state of the art, product by such a

This is one reason why I wait until a product it out and vetted before ordering one. Mike N2MS

I’m somewhat incredulous that people would urge a complete redesign of a product that is potentially days away from shipping, likely already built. The only issue is how to manage upgrades,

I sit corrected. But I wonder what the wireless in the Pico will be used for? Have to wait and see! [email protected]> wrote:

Guys, let's not speculate, the designer is not a fool. You already know him from his earlier offerings. I suggest, let's wait for the rollout and then discuss. Right now we don't know much of what's

Farhan explicitly stated the zBitx will have an RPi Pico W: " Hence, the zbitx sports a new microcontroller, the Raspberry Pico W (with Wifi and Bluetooth on it!) that handles the front panel. This

The Raspberry Pi Pico is $4. The Pico 2 (a newer version with more CPU power and flash memory) is $5. The wireless variants are an extra $2 but I don't think the zBitx is using one; it already has

The zBitx is called the zBitx because it is based on the RPi Zero 2 W (Zero Bitx), and the RPi Pico W is being added to compliment the RPi Zero 2 W, not replace it. As for the Pico vs ESP or other

Hi Rob, I wonder if there is a 2KOhm or so resistor that is not on the schematic?? That would explain the voltage on RD21.? With LD6 removed, the mic is out of the picture. Can you send a picture

The Pico brings something to the table that those alternatives do not: PIO peripherals. Those let you take most hardware protocols, including non-standard ones, and turn them into something that is

Disconnected WF4RC, Rob Carroll [signature_2773767641] From: [email protected] <[email protected]> on behalf of Raj vu2zap via groups.io <rajendrakumargg@...> Date: Monday, March 10,

In general, GPIO is not the best way to interface a display IMO: it might lead you away from being able to use the GPU, and even worse, maybe you’ll waste cycles with bit-banging. (It’s been that

Alternatively, I would ask , why a PICO and not an ESP32 ? Cheaper also ! Regards VU2UPX [email protected]> wrote:

Rob, is this with mic or mic unplugged/disconnected ?

Thanks everyone for the discussion, much appreciated. I did find a typo in my measurements documentation. The base is 2.9 v not 3.9. That resolves the concern with QD1. Using a fluke 8062 to measure.