Re: [Freetel-codec2] SM3000 pricing SM1000 features

[<wa...@k5...>]

Really sounds like a nice project there Glen,

I have had the SM-1000 since day 1, and have had great fun with it, using it mobile.

I do not use it like a mic, as I have the cables connected to my TS-480, and use a headset for mic and audio.

With a remote PTT switch I set up for it as well, so it can stay in my center console all the time.

So the ability to hold it in my had doesn't have the value for me, as it might for others.

I am very much looking forward to how this project progresses, and can't wait to see something we can try it out with soon.

By all means, lets us know anywhere we can assist you along the way.

All the best,


Walter/K5WH

-----Original Message-----
From: Glen English <gl...@co...> 
Sent: Monday, July 20, 2020 5:27 PM
To: fre...@li...
Subject: [Freetel-codec2] SM3000 pricing SM1000 features

I need some comments to drive decisions on part choices for the SM30000

My focus is on accessability- being affordable.

Having said that a few dollars saved is poor savings if the new box cannot meet our forseeable objectives.

The original project leaders are not providing any opinions, maybe they are burned out. Volunteers get that way.

The original SM1000 had a BOM (bill of materials) of about US$44 (quantity 100)  + enclosure  and packing. Setup costs for small PCB runs and small metal work runs are very high compared to the cost of the job.  The Sm1000 used commodity components, nothing special so it was able to be made in a simple factory.

The SM3000 is not going to be such a simple beast.

My estimate right now is the digital PCB would be approx USD52 or USD60

The analog interface mezzanine PCB (to provide SM1000 functionality) would be another USD20 (mostly connectors and large passives)

The digital radio  mezzanine PCB (HF + 28 MHz IF 1mW radio (capable of direct aliasing to 200 MHz) 16 bit DAC , low noise clocks,  will be around USD100 if it is high performance.

My questions- Was the Sm1000 a good idea- how many people used them as intended  ?

did anyone use it with the internal speaker-mic, or should that be a standard headset 3.5mm jack for connection to whatever ?

Total size of the digital PCB is probably around maybe 50mm x 80mm I guess.  If it goes into an existing SM1000 box, the audio board would become the baseboard, and support  all the connectors and the digital PCB would be the piggyback. IE whole digital radio in the SM1000 existing case  (but not much use withotu connectors ) !

-glen




_______________________________________________
Freetel-codec2 mailing list
Fre...@li...
https://lists.sourceforge.net/lists/listinfo/freetel-codec2