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and now for something completely different part 3


kevin gilmore
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On 3/29/2022 at 8:17 PM, audiostar said:

Thanks, Pars! 

Which pins are you using on the lower side, that go into the 14-pin socket, do you have the p/n handy? Thx

After ordering something from eBay, I just found the following perfect part that is available from Mouser as well. It is 7pin, round, gold flash, Preci-dip p/n 350-10-107-00-001101.

 

 

 

 

Edited by audiostar
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When I was repairing Todd's CFA3, I think I did this, and no, the protector didn't trigger. Also I don't recall much noise in the phones from it either. Probably not the best thing to do, and it has been a while since I worked on this.

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Hello

 

I'm on the way to CFA3 mountain, and it's my first time to build DIY amp.

Thanks to you guys, I could order PCBs, and buy most parts I need.

 

What I still don't know is how to build my own enclosure(chassis).

 

Is there any reference document or universal(?) enclosure I can use?

(I could'n t find it)

 

I always appreciate all you guys and information you shared.

 

Thank you!

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There is no generic or universal enclosure as such.

I recommend having a look at modushop, the pesante dissipante range could be the ticket. But you’ll need to tap heatsinks and drill holes for the panels. Modushop customise as well, so you could have everything done there from your drawings. eBay is another good source for enclosures.

Front Panel Express is a great company for getting drilling of your panels done, you need to work with their proprietary  software which is downloadable and fairly easy to use.

Unfortunately none of this is cheap...

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On 3/14/2022 at 12:29 AM, audiostar said:

Prior I start desoldering any components from my other boards, I thought I'll ask if anyone might need two fully populated (except Opamps and JFETs) wider boards. Not trying to make any profit, will sell at BOM cost, DM me if interested. 

 

what's the width of the PCB including the L-bracket? thanks!

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(This is the gerber file I'm looking at => cfp3smt2splitamp - CADCAM.zip dated 2022-Feb-07 in the shared Drive folder)

- what's the minimum voltage I can use with the amp?

- I've been back-reading and I've read mentions of an opamp but I cannot find it in the PCB.

- average power consumption? (or shouldn't even think about it considering it requires massive heatsink? 😁)

 

Thank you.

 

EDIT1: The file I mentioned above does NOT have the transistor portion like what I've seen in other DIY pics. What Gerber file should I be using?

 

EDIT2: What's the difference between cfa3production.pdf vs cfa3productionss.pdf

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