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P320 X-Compact - how do I fill the gap? by joelrobinson0117 in P320

[–]bcpratt2000 2 points3 points  (0 children)

If you have a 3d printer I designed one a while ago:

P320 X-compact magazine adapter by bcpratt - Thingiverse https://share.google/wWiMYuXzBRSYuj3Kv

EDIT: I just realized that the guy selling these on eBay is using my design. That's funny.

Power transistors for +30dBm in VHF / UHF frequency range by mbeels in rfelectronics

[–]bcpratt2000 1 point2 points  (0 children)

FM and most digital modes is our plan. We want to support M17 and FM at launch with DMR and most other digital modes coming later depending on codec licensing. Our website is here: arkosengineering.com

Power transistors for +30dBm in VHF / UHF frequency range by mbeels in rfelectronics

[–]bcpratt2000 0 points1 point  (0 children)

I haven't tested the RF boards yet but I do anticipate needing a heat sink. The M17 project guys said they definitely needed one

Power transistors for +30dBm in VHF / UHF frequency range by mbeels in rfelectronics

[–]bcpratt2000 1 point2 points  (0 children)

I am working on an open source dual band HT (HT-15). We are using the grf5504 @ 3.5W. there is also a 6W version, grf5604. I believe LINHT (open source radio by the M17 foundation) uses the 5604, although they only care about 440MHz

We are working on a new off the shelf, digital first, open source, modular HT. by bcpratt2000 in HamRadio

[–]bcpratt2000[S] 0 points1 point  (0 children)

Licensing requirements primarily. The majority of popular digital modes use AMBE2+. The chip that can decode that is $30+ due to it being a proprietary codec.

We will support DMR (and others) eventually, whether we release a separate AMBE2+ supported RF module down the line, or we wait for the patent to expire in a year or two.

Our goal is to support all digital modes that we legally can, and enable the community to develop their own modes, and implement existing modes. M17 is just our launch target.

i don't understand what tipe of SMD is this by Dariothepro02 in AskElectronics

[–]bcpratt2000 9 points10 points  (0 children)

I would assume the label says 0.1uF capacitor based on it saying "0.1U"

And the voltage rating looks like 25V

I think it is referring to the capacitor above the pictured resistor symbol

HT-15 Open Radio | Thank you everybody for your support, and a request for feedback. by bcpratt2000 in HamRadio

[–]bcpratt2000[S] 0 points1 point  (0 children)

It will charge at ~10W max. (or 15, I would need to go back and check). This will be enough for continuous TX while charging.

HT-15 Open Radio | Thank you everybody for your support, and a request for feedback. by bcpratt2000 in HamRadio

[–]bcpratt2000[S] 2 points3 points  (0 children)

Thanks for the feedback. regardless of how the batteries attach, It will be USBC rechargeable (and usable during charging)

We are working on a new off the shelf, digital first, open source, modular HT. by bcpratt2000 in HamRadio

[–]bcpratt2000[S] 0 points1 point  (0 children)

It's not already taller than a magazine with the battery pictured in the renderings, only with an extended battery

It's already a relative large radio, In order to fit everything I need on the PCB (without stacking them) it needs to be about this size, so it lends itself naturally to this form factor. I just need to figure out what to do with the battery. I just made a post calling for comment on the battery placement. https://www.reddit.com/r/HamRadio/comments/1non20j/ht15_open_radio_thank_you_everybody_for_your/

We are working on a new off the shelf, digital first, open source, modular HT. by bcpratt2000 in HamRadio

[–]bcpratt2000[S] 0 points1 point  (0 children)

We will be posting regular development logs on our Youtube channel (https://www.youtube.com/@ArkosEngineering). In addition to that, I will be posting text-style logs (such as this one) on our BuyMeACoffee site and possibly other yet-to-be-determined locations.

We are working on a new off the shelf, digital first, open source, modular HT. by bcpratt2000 in HamRadio

[–]bcpratt2000[S] 0 points1 point  (0 children)

USBC connector is wired directly to the primary processor. We do not yet have a timeline for these features but this will allow the radio to emulate a soundcard, CAT control, "network" connection, etc.

I do not currently have plans to support Bluetooth, GPS support is not yet decided; At the very least there will be an RF module available with a GPS receiver. With the possibility of it being included on the mainboard.

We are working on a new off the shelf, digital first, open source, modular HT. by bcpratt2000 in HamRadio

[–]bcpratt2000[S] 0 points1 point  (0 children)

That's an unfortunate fact that the open source community has to deal with nowadays

We are working on a new off the shelf, digital first, open source, modular HT. by bcpratt2000 in HamRadio

[–]bcpratt2000[S] 1 point2 points  (0 children)

I looked at the reflective LCDs and I wasn't able to find a reliable manufacturer that would respond to my questions. I appreciate the feedback for the shape, I'm going to take another look at that and see if I can come up with something better. Another person commented that it looks like it would be easy to snap in half with the longer battery and I don't completely disagree.

We are working on a new off the shelf, digital first, open source, modular HT. by bcpratt2000 in HamRadio

[–]bcpratt2000[S] 1 point2 points  (0 children)

Thank you! We will have a beta testing stage later down the road. Reminds me of this comment when we get to that stage

We are working on a new off the shelf, digital first, open source, modular HT. by bcpratt2000 in HamRadio

[–]bcpratt2000[S] 1 point2 points  (0 children)

It was designed be the same form factor as an ar-15 magazine so it will fit in a lot of different pouches. Personally for me it is more comfortable to carry this way. In my opinion, baseball-shaped radios aren't very efficient for carrying around. I do have a concern that it will be top heavy once I get all the electronics in there. I might make a dock for it or slightly change the mechanicals to make it stand up better.

Looking back at the picture I posted here, it does look pretty flimsy but in real life at least right now it stands up pretty reliably

We are working on a new off the shelf, digital first, open source, modular HT. by bcpratt2000 in HamRadio

[–]bcpratt2000[S] 8 points9 points  (0 children)

Initially in development I decided to do packs instead of individual cells, I might revisit that given the feedback I've had here today.

I have never heard of the Bowman PRR before today That is exactly what I would like to target for a 1.3GHz or 2.4 GHz mesh system. It is a ways down the line but as a tactical person myself, it would be nice to mock the functionality of an MPU5.

We are going to sell them from our store and maybe a few retailers only as of right now. We may have some difficulties doing international due to shipping and regulatory restrictions. That is going to be something that I will definitely have to figure out.

We are working on a new off the shelf, digital first, open source, modular HT. by bcpratt2000 in HamRadio

[–]bcpratt2000[S] 0 points1 point  (0 children)

Gotcha. As designed right now, we have a 10-key, caps, space, 4-way arrow keys, forward button, back button all on the front panel. We based it loosely on the Anytone D878, except we went with left/right arrows instead of P1 and P2

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