[hpsdr] Pinging Lurkers

[Eric Ellison]

Chris

I don't think the guys think the Wolfson Codec is the way to go. The TI 320
part is better and it does have pins, and more features. So far we have not
had any BGA suggested, but if so, we will definitely need a good FAB. 

You might have the capability of soldering a 208 pin tqfp part on a board,
but.... it IS going to take technique. I don't have it, so I'm out unless we
gotta reflow machine.

PICS!!! Yeah MAN! Check out the 4550! Has 4051 core and on board USB! I
think there is a faster USB part out now. I have a $200+ C-compiler (FED) I
will give to you, which works with the free PIC stuff! There is NO reason
that FPGA's alone need to slide across the Atlas! Bring it on!

Thanks to a great contributor! Keep the (re) Flow comin'!
Eric
 

-----Original Message-----
From: Christopher T. Day [mailto:CTDay at lbl.gov] 
Sent: Wednesday, March 29, 2006 8:21 PM
To: Eric Ellison; mnaruta at comcast.net
Cc: High Performance Software Defined Radio Discussion List
Subject: RE: [hpsdr] Pinging Lurkers

Maybe we should have an intermediate project of a PIC controlled (in a
DIP socket) hot plate temperature cycler so we can all do kitchen reflow
on the rest of the boards? Just to ensure that we never actually get
aywhere. [So far, I'm ok with my magnifier lamp as long as the parts
actually have pins. The Wolfson CODEC has me stumped, though.]


	Chris - AE6VK


-----Original Message-----
From: Eric Ellison [mailto:ecellison at comcast.net] 
Sent: Wednesday, March 29, 2006 5:12 PM
To: mnaruta at comcast.net
Cc: 'High Performance Software Defined Radio Discussion List'
Subject: Re: [hpsdr] Pinging Lurkers

***** High Performance Software Defined Radio Discussion List *****

Mike

Thanks Mike, I think it very prudent to go with the alpha, as I
mentioned.
The Atlas board except for a few of 12 SMT parts is more making sure you
don't miss any of the hundreds of buss connections. This board alone is
mostly thru hole stuff so it should be do-able for most folks. If not I
guess we could search for someone who would be willing to assemble for a
price. The delay will be minor with Ray, Phil, and Bill working on
evaluating the Atlas. I don't think we are too close to the Lionheart,
overtaking the Atlas, so be patient everyone. Once tested we can 'push'
the
begimminies out of the Atlas.

My thinking about the high pitch multi-pad stuff to come, is that we are
going to need a FAB who will mount at least the SMT stuff. I can tell
you, I
don't have the capability at the moment, and that condition will only
get
worse with age. Phil - VK6APH has mentioned that he has a FAB shop in
India
which can do he SMT mounting. I think all the developers and probably
the
Lurkers realize that we won't progress unless we address that fact. I
know
that Phil Covington and Phil Harman have really good microscopes, and
are
some of the few who have the capability of manually assembling the Alpha
boards from parts. It would probably be nice if we bought a stencil with
the
Alpha products. Someone also mentioned the possibility of getting a
commercial reflow station which is not being used. I'll ping him on that
and
see if it is a possibility.

Thanks
Eric


 

-----Original Message-----
From: Mike Naruta [mailto:mnaruta at comcast.net] 
Sent: Wednesday, March 29, 2006 6:55 AM
To: Eric Ellison
Cc: 'High Performance Software Defined Radio Discussion List'
Subject: Re: [hpsdr] Pinging Lurkers

I suppose it's a good idea to make a prototype for testing.
It might identify an undiscovered issue.

I'm in no hurry to get the Atlas board.  It doesn't do
anything for me until the other boards are available.
It was a good idea to freeze the design so that the other
boards could be created.

My main worry is soldering the fine pitch devices, as
that is a skill I have not developed yet.

The BoMs are nice.  That eliminates duplicating the
research for everyone who is getting a board.


Mike - AA8K



Eric Ellison wrote:

> Lurkers
> 
>  
> 
> Please report in! Lurkers are people too! Are we doing OK? What would 
> you like to see here? Are we stepping on toes? Watcher think?
> 
>  
> 
> Eric

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