Post by RdM on Jun 3, 2020 14:30:33 GMT 12
A known phenomena is that some woods with high tannin content (Oak is well known & this I think, is the origin of 'black Oak') will turn black when exposed to water + iron/steel - I had used a steel blade to mix & fill. Black staining you see around ferrous nails in wood is also caused by this. So, I had to dig it out & re-fill (using a SS knife this time) - this time, no blackening. [Edit: Only the original historic blackening in the wood remains, as it did before filling.] If there's a next time, while at the raw wood stage (too late now it's sealed) try oxalic acid to remove the black stains. Examples: Bunnings has it: Beautiful work!
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Post by Owen Y on Jun 3, 2020 15:21:11 GMT 12
Thanks RdM. I didn't think of that. And I do have some oxalic acid too (used for cleaning up deck furniture once). The nail stains (like the black marks around old floorboard nails) are now part of the 'rustic' patina 
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Post by Owen Y on Jun 12, 2020 18:00:46 GMT 12
Lately it's been awful weather for painting work (damp, cold), so it's taken a while to get a 3-coat finish dry - I realised that sealer coat & finish coats all had to be done before installing PSU parts. So here we are,... a mock-up with the front panel meter & rectifier tube... 
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Post by colinf on Jun 12, 2020 18:06:47 GMT 12
Looks good! Any ventilation for the power transformer...how warm does it run? Edit...sorry I can see ventilation holes on the front now.
AMR-iFi R&D
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Post by sadface on Jun 12, 2020 20:45:51 GMT 12
Stunning!
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Post by Owen Y on Jun 12, 2020 23:05:53 GMT 12
Hi colinf - I don't recall if the PTX gets very warm, it's been a while. But yes, perforated alumin front plate (see my earlier 1 May post).
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