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Protoboards
I've watched this group for some months, and remember the hey-day of QRP-L and Manhattan construction when I was first getting into Amateur Radio. Recently re-licensed, I've been building back up my junk box and beginning to play a little. Chiefly I've started with old-fashioned proto-boards and the K3NG keyer. Digital is an easier way to begin building. IMO.
I'm watching with great interest the revival/review of Manhattan building on this list. Thank you! I notice economics of building have changed somewhat. It's harder to stockpile a variety of parts without the variety-packs NorCal & others occasionally put together. SMT's can be a bargain, though, including variety-packs from ebay. Copper boards are not free, but custom PCB printing is dirt cheap, sometimes cheaper than the raw boards. Ugly/Manhattan are classic (and sometimes beautiful-- but not when I do it!) modes of building. "Limerick" as in the current-ish run of GQRP Sudden receivers () and Chuck's Muppet seem related as ways to evolve Manhattan. But I find really interesting pre-printed proto-boards designed to be flexible and easy to build on. For $5 for a handful (shipped!) they seem like no-lose propositions. The first I found was the W7RLF Protoboard: This has great big pads for soldering to like Manhattan, spaced closely enough that perhaps SMD components could be used to connect them, too. But it seems really oriented to discrete components mounted in Limerick/Manhattan style. It has a full solid ground plane with the diamond shape pads connecting to it. I haven't yet wrapped my head around an easy way to use DIP IC's with this board (besides adding "sleds"), but the capacity to use header pins on the edges is a nice touch. This could be a nice board for an all-discrete build. Next I found the the Makerverse Protoboard: This seems to be well suited for a mix of SMD's, IC's, and other through-hole components. Its "ground plane" is really a tight grid: I don't know how that will work for RF applications: whether it might be tight enough to act as a solid, or whether it might offer a lot of unwanted capacitance. Today I discovered the (6-8 year-old!) ElectronicEel protoboard: With the ground plane option, this seems to combine a solid ground plane with a little nicer (more ample for mature eyes!) spacing than the Makerverse board. Someday I need to learn KiCad or something and roll my own. A solid ground plane seems fundamental. I like the headers on the edges. I would love to add dedicated pads for BNC (and SMA), Barrel/power-pole DC connectors, and maybe PCB-mounted Pot's/switches. Maybe a power bus or two. Maybe some longer pads specifically for DIP IC's going down the middle like a traditional protoboard. A board like this seems like it could take away some of the fiddliest bits of home-brewing. With digital VFO's and $5 CPU's where one can program practically bare metal with high-level languages like Python, this seems like a great time to be a home-builder. Custom PCB's that are delivered for less than the cost of a couple gallons of gas is amazing. Custom PCB's that are flexible prototyping boards seem ideal for the experimenter. What proto boards have you found or do you like? Or, dare I dream, what KiCad maestro might feel inspired to roll the "ultimate" 2025 QRP home-brewers protoboard? 73 de Todd W2TEF |
Hey Todd, I'm sure you already know but maybe this will help others.? There are a ton of protoboards available on Amazon in various sizes and aspect ratios with a variety of trace patterns.? They are sold in multiple lots and are cheap and of reasonable quality.? They could be "carefully" sandwiched over an appropriate size piece of solid copper PCB material to provide a ground plane. Jim WB4ILP? On Wed, Mar 19, 2025, 7:59 AM Todd W2TEF via <w2tef=[email protected]> wrote: I've watched this group for some months, and remember the hey-day of QRP-L and Manhattan construction when I was first getting into Amateur Radio. Recently re-licensed, I've been building back up my junk box and beginning to play a little. Chiefly I've started with old-fashioned proto-boards and the K3NG keyer. Digital is an easier way to begin building. IMO. |
I've bought a few various PCB's but haven't used any yet.? Take a look and you might be pleasantly surprised at the variety and price.? ?Amazon is pretty amazing, we buy virtually everything from my electronics to our morning coffee.? Lots of components available in small lots and you can read the reviews.? They have a good selection and pricing on soldering supplies and soldering irons/stations.? I just bought a new station and a bunch of soldering supplies at a great price.? I don't mean to be an Amazon ad but it does make it easy to source electronic hobby supplies.? The list of items they have is nearly endless and most everything has many reviews.?? Prices are usually very competitive. Jim WB4ILP? On Wed, Mar 19, 2025, 9:36 AM Todd W2TEF via <w2tef=[email protected]> wrote: Jim, |
The W7RLF board is designed to use IC's either dead-bug style, or with the grounds being used to mount the IC to the groundplane only, and the rest of the pins being bent up to float above the board with components or jumpers attached directly to them. The spacing of the pads is the same pitch as IC pins, so should be pretty straightforward to do.? Grainy video here shows this with an LM386:
https://www.youtube.com/watch?v=BoiyA2U8BbY ?
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Ryan Flowers - W7RLF |
Ryan, thanks for the quick response and link to video. And thank you for a great proto board with free gerbers! To me it makes a lot of sense as a Manhattan-alternative.
Dead bug makes sense. Soldering the grounds and lifting or shifting the others makes sense. I was slow to imagine those because I was thinking about using a socket. Maybe a small, non-conductive shim under the socket could take the force of IC insertion without damaging the shifted, connected pins. Thanks for the inspiration! 73 de Todd W2TEF |
Todd
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For many of us modular construction goes well, and the modules can be enjoyed in more than one project. And means of construction can be varied. Yes having a practical means to mix SMT and leaded parts is quite useful. I have some assembled modules here ready for most of a receiver when I get back to it.?
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Curt wb8yyy?
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