Re: uBitx Prototype (PCB)

Jack Purdum <econjack@...>

The cost of what I call Beta Boards is pretty high, as Jerry points out. However, once the design is set, the costs fall dramatically. I ordered 200 small boards (2"x3") at about $1 each for a recent project. These were similar to the quality seen in the Forty-9er assembly manual ( I would think that boards made for SMD's would cost less, but I don't know as I have not purchased any.

Jack, W8TEE

From: Jerry Gaffke via Groups.Io <jgaffke@...>
Sent: Saturday, April 8, 2017 11:03 AM
Subject: Re: [BITX20] uBitx Prototype (PCB)

OSHpark is the best I've seen on small runs:
For $5 per square inch, you get three double sided boards with soldermask and silk at 6 mil design rules.  The BItx40 at 4.5x5 inches would cost $5 * 4.5*5 = $112.50, or $37.5 per board.  But the bidi amps are one square inch each, so could get three of them for a total of $5.
Could go to 0805 or 0603 or 0402 parts to drastically reduce the size of the Bitx40 (or uBitx).  Take a look at 0201's if you are especially cheap and masochistic, but then you'll want access to a good binocular microscope.

On Sat, Apr 8, 2017 at 06:56 am, Jack Purdum wrote:
Finally, you could have a thru-hole board manufactured. I've done this with the Forty-9er and antenna analyzer project and if you have enough boards done, the cost isn't that bad.

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