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Post by firebottle on Sept 3, 2020 10:22:42 GMT
Taking of lots of fasteners I have just fixed a Denon that had 27, yes 27 screws in the bottom cover!
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Post by sq225917 on Sept 3, 2020 11:49:36 GMT
I did a nut n bolt rebuild on a ksa 200. Stopped down to pcb level, every board scrubbed and rinsed, psu recapped, main boards recapped, cpnyrpl board recapped, softstart rebuilt, one driver board repaired two output device replaced. All metal work refinished, it had blown a psu cap so all painted surfaces were ruined and top plate looked charred. About 100 hours and £700 worth of parts all in.
Id never do another, maybe a 50, but not a 200.
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Post by firebottle on Sept 3, 2020 13:37:27 GMT
Flippin' heck Simon, that was a big job!
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Post by sq225917 on Sept 3, 2020 15:11:58 GMT
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Bigman80
Grandmaster
AA Founding Member & Bigbottle Audio Creator
Posts: 16,063
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Post by Bigman80 on Sept 3, 2020 15:40:53 GMT
Turned out alright....I suppose...... lol Joking, looks a job well done!
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Post by sq225917 on Sept 7, 2020 19:42:28 GMT
Extra pcb boards added to the mod86p bridged monos today. 800Va of transformer and 176,000uf of psu filter capacitance between them now.
I managed to dial the dc output offset down as well, 0.1mV on one channel, 0.0mV on the other....
Might even listen to some music tomorrow...
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Bigman80
Grandmaster
AA Founding Member & Bigbottle Audio Creator
Posts: 16,063
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Post by Bigman80 on Sept 7, 2020 20:10:31 GMT
Extra pcb boards added to the mod86p bridged monos today. 800Va of transformer and 176,000uf of psu filter capacitance between them now. I managed to dial the dc output offset down as well, 0.1mV on one channel, 0.0mV on the other.... Might even listen to some music tomorrow... That all sounds very positive.....I will await the verdict with enthusiasm
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Post by sq225917 on Sept 7, 2020 21:19:25 GMT
I doubt they'll sound any different, maybe a little tighter before they start clipping.
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Bigman80
Grandmaster
AA Founding Member & Bigbottle Audio Creator
Posts: 16,063
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Post by Bigman80 on Sept 7, 2020 21:21:08 GMT
I doubt they'll sound any different, maybe a little tighter before they start clipping. Possibly.....but you never know!
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Post by sq225917 on Sept 8, 2020 9:52:25 GMT
Have to wait for the neighbours to leave to really give it some beans. Ill leave it playing for a few hours to fully cycle the psu caps.
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Bigman80
Grandmaster
AA Founding Member & Bigbottle Audio Creator
Posts: 16,063
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Post by Bigman80 on Sept 8, 2020 10:12:33 GMT
Have to wait for the neighbours to leave to really give it some beans. Ill leave it playing for a few hours to fully cycle the psu caps. Bloody neighbors lol
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Post by sq225917 on Sept 8, 2020 12:43:10 GMT
Actually, it does hang on just a little bit longer as you turn the wick right up. Marginally less congestion at full tilt.
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Bigman80
Grandmaster
AA Founding Member & Bigbottle Audio Creator
Posts: 16,063
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Post by Bigman80 on Sept 8, 2020 13:22:57 GMT
Actually, it does hang on just a little bit longer as you turn the wick right up. Marginally less congestion at full tilt. Ah, positive result so far...nice one
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Post by sq225917 on Sept 8, 2020 15:09:07 GMT
Yeh, not that I ever play that loud at home...
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Post by sq225917 on Sept 10, 2020 16:19:14 GMT
I played quite a bit of music today, its defo a touch improved, not bigly, but enough to notice
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Bigman80
Grandmaster
AA Founding Member & Bigbottle Audio Creator
Posts: 16,063
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Post by Bigman80 on Sept 10, 2020 16:20:29 GMT
I played quite a bit of music today, its defo a touch improved, not bigly, but enough to notice Not a bad result for a relatively low outlay. May get better still as it all beds in?
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Post by sq225917 on Sept 10, 2020 19:17:26 GMT
The clocks warm up over half an hour. I'm quite looking forward to the StationPi Ian's designing. Its a large flat copper plane shielded pcb that splits the pi and disc source on one side and the fifopi, dac and output stage on the other with two large vertical copper planes between them. Looks like it'll work with most dac hats.
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Bigman80
Grandmaster
AA Founding Member & Bigbottle Audio Creator
Posts: 16,063
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Post by Bigman80 on Sept 10, 2020 19:48:38 GMT
The clocks warm up over half an hour. I'm quite looking forward to the StationPi Ian's designing. Its a large flat copper plane shielded pcb that splits the pi and disc source on one side and the fifopi, dac and output stage on the other with two large vertical copper planes between them. Looks like it'll work with most dac hats. That looks awesome! *Checks banks*
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Post by jimbo on Sept 11, 2020 5:18:17 GMT
I agree.
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Post by stevew on Sept 11, 2020 7:28:48 GMT
The clocks warm up over half an hour. I'm quite looking forward to the StationPi Ian's designing. Its a large flat copper plane shielded pcb that splits the pi and disc source on one side and the fifopi, dac and output stage on the other with two large vertical copper planes between them. Looks like it'll work with most dac hats. Ohh.. that looks interesting. I followed Oli’s advice and bolted my pi/Pecan system to an aluminium sheet. Worked well .. even more so when I rested the whole lot on some chi-Fi isolation feet. Much less digital more analogue with a sense a air around everything easing the ability to identify separate instruments. Really quite surprised. However isolating the components further makes huge sense.
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Bigman80
Grandmaster
AA Founding Member & Bigbottle Audio Creator
Posts: 16,063
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Post by Bigman80 on Sept 11, 2020 7:31:26 GMT
The clocks warm up over half an hour. I'm quite looking forward to the StationPi Ian's designing. Its a large flat copper plane shielded pcb that splits the pi and disc source on one side and the fifopi, dac and output stage on the other with two large vertical copper planes between them. Looks like it'll work with most dac hats. Ohh.. that looks interesting. I followed Oli’s advice and bolted my pi/Pecan system to an aluminium sheet. Worked well .. even more so when I rested the whole lot on some chi-Fi isolation feet. Much less digital more analogue with a sense a air around everything easing the ability to identify separate instruments. Really quite surprised. However isolating the components further makes huge sense. That looks very tidy!!! Shocking isn't it....just giving them a rock sold base and some isolation/couoling, makes a big difference. I went super cheap and just used sorbothane feet, but super soft ones. Made a very noticeable difference. Like you found, it's seems to take the hardness away somehow. Great result
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Post by stevew on Sept 11, 2020 8:29:48 GMT
Ohh.. that looks interesting. I followed Oli’s advice and bolted my pi/Pecan system to an aluminium sheet. Worked well .. even more so when I rested the whole lot on some chi-Fi isolation feet. Much less digital more analogue with a sense a air around everything easing the ability to identify separate instruments. Really quite surprised. However isolating the components further makes huge sense. That looks very tidy!!! Shocking isn't it....just giving them a rock sold base and some isolation/couoling, makes a big difference. I went super cheap and just used sorbothane feet, but super soft ones. Made a very noticeable difference. Like you found, it's seems to take the hardness away somehow. Great result I’ll have to do my own bake off..sorbothane feet vs these isolation feet. I’m absolutely delighted by the results by putting them under the BB3 though.. Ohh.. look at the dust on there Not that expensive. £27 for 4 on Ali express.. or £20 in black. Mind you they do a stainless steel version with ceramic ball bearings for £57. (Prices jumped by a few quid in the last couple of days ) a.aliexpress.com/_mKxAATl
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Post by sq225917 on Sept 11, 2020 10:14:25 GMT
Getting your dac hat from the pi makes a big difference, nicely with the stationPi the pi is flipped so you can stack an ssd on top of it.
My Gustard arrived this morning, its on soak while I'm painting
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