FS: One set of F1 clone amp boards (2 channels) - diyAudio
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Old 9th March 2009, 12:39 PM   #1
cfcubed is offline cfcubed  United States
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Default FS: One set of F1 clone amp boards (2 channels)

They are new & have never been out of their plastic wrap. You can see them in use in my F1/F2 build thread and read more about them.

These are suds' earlier PCBs (suds now offers modified ones that NP appears to have no objection to (earlier, IP compliance was suspect)). As I've got more amps than I can use its clear I won't be using these. They are very nice proofed boards & I'll send the BoM I used to the buyer.

Offering to US only (others can go direct w/suds) at $30/pair + $9 USPS Priority w/delivery conf. So that's $39 USD Verfied/Confirmed (non-CC) instant Paypal payment only. I'll cover the PP fee. To PP confirmed address only. Price is firm.

This is below my cost for them but they want to be heard, not stored Again, you will need to source the standard PS (board or PTP).
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Old 9th March 2009, 01:51 PM   #2
mikje is offline mikje  United States
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I have a question about the BOM. Can I get a "ballpark figure" what it would cost to populate this pair of boards. Not knowing a lot about the F1 and First Watt family, I have to ask; are both boards needed for a single amp? I'm only asking to see if it would be worth taking on this project. I would need to buy all the components, as I have no stock of my own. I would try to source as much as possible from places such as Parts Express, to give an idea of where "I like to shop."
Thanks.
Mike
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Old 9th March 2009, 02:45 PM   #3
cfcubed is offline cfcubed  United States
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Here's a shot of my personal F1 BoM w/prices... All from about 7/2008.
You can see I'm a scavenger Everything worked/works great for me (incl the 10kUF caps) though usual YMMV caveats apply:
Click the image to open in full size.
HiFiMakers more recent offering has good info incl his BoM (but he seems to have gone "dark" - hopefully he's o.k. & maybe just coping w/the logistics of his F1 GB?)

Edit: Yes you need 2 channel PCBs (plus 1 PS PCB) to have stereo amp & this post is the 2 channel PCBs for $39 shipped. There are other sources around here for the required PS PCB - Think at least F1 -> F3 have same PS requirements (perhaps others - poke around these forums for info about that).
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Old 9th March 2009, 05:11 PM   #4
mikje is offline mikje  United States
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cfcubed,
Thanks for the info. So, if I understand correctly, one could build this set-up complete for approximately $300 or so, if all components had to be purchased. Sound reasonable?
Thanks again,
Mike
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Old 9th March 2009, 06:16 PM   #5
cfcubed is offline cfcubed  United States
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Quote:
Originally posted by mikje
So, if I understand correctly, one could build this set-up complete for approximately $300 or so, if all components had to be purchased.
Using cost-cutting compromises I was able to do so:
  • Using ebay/surplus 10kUF PS caps instead of recommended 15kUF ones
  • using least-expensive PS toroid that met spec'd reqs
  • making case from raw surplus alum plate + surplus heatsink
  • some elec comps were lower-cost alternatives (e.g. there are better resistors than I used)
  • some of the common/cheaper parts I had on hand (see "have" in my BoM)
  • my BoM lacks speaker binding posts, wires & maybe a couple other bits (screws, things I'm forgetting, etc.)

Think $400-$500 USD is the commonly mentioned min cost of a build. And that's if you know what are doing and everything goes according to plan

Best if you take some time & surf around these forums for more info.
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Old 1st April 2009, 07:37 PM   #6
cfcubed is offline cfcubed  United States
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Default Price drop.

Now offering to US only (others can go direct w/suds) at $25/pair + $9 USPS Priority w/delivery conf. So that's $34 USD Verfied/Confirmed (non-CC) instant Paypal payment only. I'll cover the PP fee. To PP confirmed address only. Price is firm (again
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Old 20th April 2009, 02:35 PM   #7
cfcubed is offline cfcubed  United States
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Default WITHDRAWN

I'll be building these F1 boards out for a friend that built Frugal Horns... So these are no longer for sale.
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Old 25th May 2009, 05:07 AM   #8
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Hey cfcubed. Thank you for the advice in your previous post. If you do decide to sell these please let me know. Also could you tell me how these differ from the modified boards suds is currently selling. Thank you.

Jay
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Old 25th May 2009, 01:41 PM   #9
cfcubed is offline cfcubed  United States
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To my knowledge, suds re-authored the layout of the boards to meet IP reqs:
suds F1 PCB revision
So this should make them "different" boards that still implement the F1 schematic.

I'll press my friend on whether he wants an F1 to go with his frugal horns... Should know by 1st week in June & will let you know then.
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