Well, the boards are quite real, but I cannot make promises on any timeframe here, or other circumstances. I am not one for luck or prayers, but not one to advice against it either. It just may take me time to troubleshoot it. I have limited time and parts to work with.
Anyways,
This is a starting point.
Well, the boards are quite real, but I cannot make promises on any timeframe here, or other circumstances. I am not one for luck or prayers, but not one to advice against it either. It just may take me time to troubleshoot it. I have limited time and parts to work with.
Anyways,
This is a starting point.
Thanks for the follow up info. I am following you here!
Russellc
Well, the boards are quite real, but I cannot make promises on any timeframe here, or other circumstances. I am not one for luck or prayers, but not one to advice against it either. It just may take me time to troubleshoot it. I have limited time and parts to work with.
Anyways,
This is a starting point.
Looks very promising!
if you build it, they will come...Well, the boards are quite real, but I cannot make promises on any timeframe here, or other circumstances. I am not one for luck or prayers, but not one to advice against it either. It just may take me time to troubleshoot it. I have limited time and parts to work with.
Anyways,
This is a starting point.
Here is the right side channel built up and functional.
There is area to cover the transformer over which I plan to do later.
https://youtu.be/XLrI1UiYmcs
You can note how clean and organized my audio lab is.
So that's where the magic happens teabag! Nice amp..!
I like the numbering on the opto! Stops you from putting it backwards 😉
I like the numbering on the opto! Stops you from putting it backwards 😉
Thank you. I put that on there myself, but I think going forward I might just sharpie a dot in there for people. Cheaper than retooling artwork and board.
The nice thing about white boards is I can write notes on them like paper.
So here is the a long demo, of the left channel board. Don't expect much bass with a near zero baffle 3" driver. But it does sound fine.
Both boards now work fine. I did manage to have an open channel on one of my transformers from desoldering or some other mishap, so I desoldered the working one gently and put into the left channel board.
https://youtu.be/1G0xWra-VFI
Same thing with this one R7 I changed to 52k to dial-in negative offset. Overall offset sits at 0.003-8
So I think this thing is good to go for a group buy. I would need Papa's blessing for it, and then I can start a separate thread.
Excellent. I ordered power transformer from Antek (500VA 18 + 18) and more wire yesterday. Are you going to list the parts you used? I have them all from the suggested list somewhere on this thread, but I like that offset figure and want to build as close to your version as possible to maintain those figures.
Thanks,
Russellc
Thanks,
Russellc
Sure I will put up a BOM of the parts I used in my build blog I am working on. They are by no means a recommendation, rather parts I trust to work, have low thermal tempco etc. When I get an extra signal transformer I will measure with FQA parts as well.
Russell are you using the 300mm or 400mm deep 4U Store Chassis?
I think 4U deluxe will be fine. I just used one for F-6. That is the heat sink I compared your boards pattern to.
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yes, thank you. Please let us know if you want to make the boards for a group buy (or private sale).
I will need Nelson's😎 approval to do either. There may be plans in the audiostore to make such a board. I am uncertain. I dont mind doing a GB for them as long as it's okay with him.
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