Re: AE7EU Top Level PCB Mod
Diver Martin <diver.martin@...>
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So, good news, bad news.
Good news: I got a BoM together, defined all the parts, etc.
Bad news: The BoM (majority single unit pricing from Digikey, but I took out gross single-part costs like 0603 capacitors/resistors/etc) is $112. This might vary from half to 3/4 depending on the volume, so $60 to $90 or something. Without knowing the volumes I'd do, it's hard to define.
Good news: I have a vendor in town that will assemble the boards.
Bad news: It's about $1 a part to place it on the PCB in a prototype run. There are 147 SMT parts, assuming the person buying the board installs all TH components, toroids, etc. That's $150 a PCB for assembly worst case. In prototype quantities, I was told $1 per part (RoHS $1.20) (qty 1-10 boards). Past assemblies I've heard down from $0.1 per part to $0.25 per part, so I'm not quite sure where to go on that front, as it's also volume dependant I believe. I've put out a few pings to those I know who've gotten things built up for a better guestimate, but for now, I'll go with the pessimistic $1/part.
So... Assuming a good case of $75 for the BoM, $10 for the PCB, $15-$150 for assembly, $10 shipping, not including the $500 NRE or my initial builds (so tack on $10 there too assuming a run of 100 PCB's). Soooo... $110 to $250 is the current price bracket that I've got, the major uncertainty in the cost of per-part placement / assembly.
#1 cost item: Relays for the tuner and other things ($35)
#2 cost item: Teensy3.2 ($20)
#3 cost item: Minicircuits mixer ($3.15)
#4 cost item: 20-turn precision pots ($3 total, eliminate final design)
For those who wish to peruse... A BoM is attached.
On Wed, Jan 10, 2018 at 10:39 PM, Martin Held <diver.martin@...> wrote: