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Curious why you went with the wm8731 codec? I've never used one. What is its claim to fame? That thing looks pretty crazy to me for use in a simple rig.

On Sat, Jul 2, 2022 at 9:25 AM Don--AE4DW <AE4DW.Don@...> wrote:

On Fri, Jul 1, 2022 at 08:19 PM, Ashhar Farhan wrote:

Scott,

We will still be giving out the basic kit at a much lower price (about the same as the ubitx).

The main board is almost twice the size of ubitx. We had to use much more costlier transmit filter components, large heatsinks to larger T50-6 toroids and 250v, RF grade capacitors. This is a 40 watt radio.

We are more than happy if we can cover costs. Unfortunately the timing got us on the wrong side.

But here is the upside. There is nothing in the design that is unobtainable even in these days of shortage. The circuit is all discrete and easily put together from your junk boxes. Substitutions are easy too. The only critical thing is that you must use a raspberry pi and a wm8731 codec (still available as a board from mikro for 20 dollars). You can still scratch build it yourself, at least a QRP version for less than $100 dollars (if you already have a raspberry pi). It works equally well with a regular hdmi display.?

It is a bit of an effort, but someone can take a stab at porting the code to a PC too.?

?

So the basic kit availability is further down the line? Only the full kit available initially?

--

Paul Mateer, AA9GG
Elan Engineering Corp.

On Fri, Jul 1, 2022 at 08:19 PM, Ashhar Farhan wrote:

Scott,

We will still be giving out the basic kit at a much lower price (about the same as the ubitx).

The main board is almost twice the size of ubitx. We had to use much more costlier transmit filter components, large heatsinks to larger T50-6 toroids and 250v, RF grade capacitors. This is a 40 watt radio.

We are more than happy if we can cover costs. Unfortunately the timing got us on the wrong side.

But here is the upside. There is nothing in the design that is unobtainable even in these days of shortage. The circuit is all discrete and easily put together from your junk boxes. Substitutions are easy too. The only critical thing is that you must use a raspberry pi and a wm8731 codec (still available as a board from mikro for 20 dollars). You can still scratch build it yourself, at least a QRP version for less than $100 dollars (if you already have a raspberry pi). It works equally well with a regular hdmi display.?

It is a bit of an effort, but someone can take a stab at porting the code to a PC too.?

?

So the basic kit availability is further down the line? Only the full kit available initially?

On Fri, Jul 1, 2022 at 08:19 PM, Ashhar Farhan wrote:

Scott,

We will still be giving out the basic kit at a much lower price (about the same as the ubitx).

The main board is almost twice the size of ubitx. We had to use much more costlier transmit filter components, large heatsinks to larger T50-6 toroids and 250v, RF grade capacitors. This is a 40 watt radio.

We are more than happy if we can cover costs. Unfortunately the timing got us on the wrong side.

But here is the upside. There is nothing in the design that is unobtainable even in these days of shortage. The circuit is all discrete and easily put together from your junk boxes. Substitutions are easy too. The only critical thing is that you must use a raspberry pi and a wm8731 codec (still available as a board from mikro for 20 dollars). You can still scratch build it yourself, at least a QRP version for less than $100 dollars (if you already have a raspberry pi). It works equally well with a regular hdmi display.?

It is a bit of an effort, but someone can take a stab at porting the code to a PC too.?

?

So the basic kit availability is further down the line? Only the full kit available initially?

Scott,

There is a provision to run any other software (I started with wsjtx) using the last of the mode settings : digital. You can run these additional modes like you would on a conventional radio.

That said, js8call actually works right now. You have to use a simple hack:

With "/ft8mode manual" you can disable the auto feature of ft8, now just tune to the JS8call and chat away. Anything you type on the display will get transmitted

On Sat, Jul 2, 2022, 7:54 AM Scott KE8KYP <scott_massey@...> wrote:

Hi Ashhar,

Thank you very much for the response.? I understand the timing bit.? My company has been having a rough go of it just getting certain IC stocks to build circuit boards.? We make UPS equipment for large data centers.? The past two years have been very challenging for us and I am sure for you as well.? I am not sure quite yet what I will order but I will be ordering.

Question: If you are using the raspberry PI 4 (it has two HDMI outputs): Can you run a raspberry version of JS8Call (for example) and have the JS8Call user interface displayed on the second HDMI and still retain the primary monitor for the "native" sBITX interface?? Maybe that isn't available for the immediate release but it sure would be great if it came at a later date.

Thanks again for your hard work and quality products.? I think you have earned a nice profit.

Cheers, Scott

Hi Ashhar,

Thank you very much for the response.? I understand the timing bit.? My company has been having a rough go of it just getting certain IC stocks to build circuit boards.? We make UPS equipment for large data centers.? The past two years have been very challenging for us and I am sure for you as well.? I am not sure quite yet what I will order but I will be ordering.

Question: If you are using the raspberry PI 4 (it has two HDMI outputs): Can you run a raspberry version of JS8Call (for example) and have the JS8Call user interface displayed on the second HDMI and still retain the primary monitor for the "native" sBITX interface?? Maybe that isn't available for the immediate release but it sure would be great if it came at a later date.

Thanks again for your hard work and quality products.? I think you have earned a nice profit.

Cheers, Scott

Cool design, I really want to try it. Will probably use BF998 in RX mixers.
5MHz IF may be a problem for US hams, because of the very strong WWV signal right on that frequency. Even the input bandpass filter attenuation of 50-60dB? may not be enough.
4.9152MHz is an alternative to consider.

Is the 3D design for the PTO part available?

73, Mike AF7KR