EMRFD Message Archive 12165

Message Date From Subject
12165 2016-01-05 14:55:30 Chris Trask Prototyping SMT Boards
I've only just now realised that Circuit Spacialists has distcontinued their IF/RF prototyping board, and I only have a few scrap pieces left. I've looked in all of the usual places for a substitute, but haven't found anything as of yet. What I would really like is a small board with SOT-23-6 pads together with 0.080" square pads on a 0.100" grid. I layed such a thing out a few years ago after some people expressed interest in making some, but nobody ever made any.

Anyone know of an immediate source for such an item? I don't want to have to resort to having boards custom made or making my own.


Chris Trask
N7ZWY / WDX3HLB
Senior Member IEEE
http://www.home.earthlink.net/~christrask/
12167 2016-01-05 21:36:29 arfghans Re: Prototyping SMT Boards
Busboard makes some very nice breadboards for SMT work. Pads on 50-mil centers, some with holes, and a full ground plane on the back. Mount SOICs, SOTs, and any SMT part down to 0402 easily. Run a wire thru a hole to get to ground. My absolute favorites and not very expensive. Mouser stocks them, for instance p/n  854-SP2-50X50-G.  


Gary, NA6O




12168 2016-01-05 21:41:55 arfghans Re: Prototyping SMT Boards
Heh... Amazon carries them too. (If you have Amazon Prime, free 2-day shipping.) Search for Busboard SP2.

Gary, NA6O
12169 2016-01-05 23:11:47 John Re: Prototyping SMT Boards
12170 2016-01-06 06:03:44 Chris Trask Re: Prototyping SMT Boards
Looks like there are a couple of useful boards there, and they can be purchased through Mouser. I'll have to give that a close look when I have a faster connection (I'm presently on dial-up).

I got some SOT-23-6 adapters from a seller in Thailand which will easily take care of the SOT-23 issue. The PCB I had designed is 2"x4" with six SOT-23-6 pads and 0.080" square pads on 0.100" centres. It was intended for doing serious RF work. Nobody wanted to go to the trouble of making a single one, and I don't want to go to spend the time learning how.

>
>Busboard makes some very nice breadboards for SMT work. Pads on 50-mil
>centers, some with holes, and a full ground plane on the back. Mount
>SOICs, SOTs, and any SMT part down to 0402 easily. Run a wire thru a
>hole to get to ground. My absolute favorites and not very expensive.
>Mouser stocks them, for instance p/n 854-SP2-50X50-G.
>
> http://www.busboard.com/ http://www.busboard.com/
>


Chris Trask
N7ZWY / WDX3HLB
Senior Member IEEE
http://www.home.earthlink.net/~christrask/
12171 2016-01-06 06:16:27 ve3ghm Re: Prototyping SMT Boards
My favourite of late are some proto boards offered by an eBay retailer
called DAR Tec. They (he) is located in the UK

http://stores.ebay.com/DAR-Tec-Matrix-Boards

currently listed are what he refers to RF Matrix padboard - 0.10" hole
spacing, solid ground plane on one side, square pads on the others. I
use this style of board for both through hole and SMD parts although the
holes do get in the way sometimes.

He has made on request for me simple boards similar to that described
about but WITHOUT any holes which I find works OK for much SMD proto
typing - the square pads are about 0.08" square on 0.10" centers. The
one he made for me were single sided but I am sure he could make them
with a solid ground plane on the opposite side. These work OK for SMD
and I also build on them using these small pads as tiny Manhattan pads
using through hole parts too.

email and ask him for these and he will make some more. He seems to be
quite receptive to new ideas and if you have a good suggestion for
something similar I am sure he would make some up and put some others in
his eBay store and is something I would likely purchase as well.


cheers, Graham ve3gtc


12172 2016-01-06 06:53:52 Chris Trask Re: Prototyping SMT Boards
>
>My favourite of late are some proto boards offered by an eBay retailer
>called DAR Tec. They (he) is located in the UK
>
>http://stores.ebay.com/DAR-Tec-Matrix-Boards
>
>currently listed are what he refers to RF Matrix padboard - 0.10" hole
>spacing, solid ground plane on one side, square pads on the others. I
>use this style of board for both through hole and SMD parts although the
>holes do get in the way sometimes.
>

That looks like a winner, and I'm going to give those a serious look. Odd that those never appeared in my evilBay searches.

>
>He has made on request for me simple boards similar to that described
>about but WITHOUT any holes which I find works OK for much SMD proto
>typing - the square pads are about 0.08" square on 0.10" centers. The
>one he made for me were single sided but I am sure he could make them
>with a solid ground plane on the opposite side. These work OK for SMD
>and I also build on them using these small pads as tiny Manhattan pads
>using through hole parts too.
>
>email and ask him for these and he will make some more. He seems to be
>quite receptive to new ideas and if you have a good suggestion for
>something similar I am sure he would make some up and put some others in
>his eBay store and is something I would likely purchase as well.
>

I'll contact him and send a copy of my artwork. Having the SOT-23-6 pads right on the PCB would be a lot easier than using the SOT-23 to DIP adapters and would take up less space, though it does work for the short-term.


Chris

When the going gets weird, the weird turn pro
- Hunter S. Thompson
12173 2016-01-06 08:22:51 farhanbox@gmail.c... Re: Prototyping SMT Boards

i have toner transfered this pattern. scotch tapes the bottom layer to protect it. i can pass on some 6" x 6" boards to you.

the holes were drilled through on demand. my greater grief was to scrape enamel off the copper wire to make the connections.

- f


 

12174 2016-01-06 09:33:01 Chris Trask Re: Prototyping SMT Boards
The SP1-100x100-G would fit very nicely in the test enclosures that I use, and from Mouser they are not terribly expensive.

>
>Busboard makes some very nice breadboards for SMT work. Pads on 50-mil centers,
>some with holes, and a full ground plane on the back. Mount SOICs, SOTs, and any
>SMT part down to 0402 easily. Run a wire thru a hole to get to ground. My absolute
>favorites and not very expensive. Mouser stocks them, for instance
>p/n 854-SP2-50X50-G.
>
> http://www.busboard.com/ http://www.busboard.com/
>


Chris

When the going gets weird, the weird turn pro
- Hunter S. Thompson
12175 2016-01-06 09:42:32 Chris Trask Re: Prototyping SMT Boards
>
>My favourite of late are some proto boards offered by an eBay retailer
>called DAR Tec. They (he) is located in the UK
>
>http://stores.ebay.com/DAR-Tec-Matrix-Boards
>

Item 171372903868 (Large RF Matrix PadBoard) is a perfect substitute for what I had been buying from Circuit Specialists, and far less expensive. A 10"x10" panel from them was costing about $60 with tax, and these from Britain are less than $16 for a panel about two-thirds the size, so they come to less than half of what I had been paying. Super! The smaller ones (#171692970546) are also affordable, even with the overseas shipping.


Chris

When the going gets weird, the weird turn pro
- Hunter S. Thompson
12176 2016-01-06 10:14:13 mvs_sarma@ymail.c... Re: Prototyping SMT Boards
Perhaps there are chemical strippers for enamel wire. Too thin wires like litz wires and 36 swg, and higher gauges can't be scrapped.  Thus they use paste and wipe off the enamel.
12827 2016-05-13 15:29:05 David J Nushardt Re: Prototyping SMT Boards

Chris, Where do you get the test enclosures ? Do you have a part Number? Thanks for the info.

73 Dave
N9OOQ