I've read some more articles and FWIW there is one page on measurements here http://www.lampizator.eu/LAMPIZATOR/Measurements/lampizator%20measurements.html I would be interested in trying a tube output stage for one of the DAC PCB kits on ebay, like the AD1865N-K, and see he has a SRPP for...

Actually he does have some articles where he posts test results before and after his mods. This link has a photo of an oscilloscope trace of the SPDIF signal, search for "SPDIF trace in stock form" within the article. Later down it has a photo of the trace after his mods, which looks like a...

I saw this tubed DAC kit online it looks like it could be a fun project, and was wondering if anyone had experience with it, or with other kits from the same seller raindrop_hui - how the build quality was? Would this be a good alternative to some of the projects on the lampizator site like...

I am looking for an entry level DAC and saw this tubed DAC kit online it looks like it could be a fun project, and was wondering if anyone had experience with it, or with other kits from the same seller raindrop_hui - how the build quality was? Would this be a good alternative to some of the...