I’ve been struck by a couple of examples recently how much difference to hum this cable screening can make. You don’t need much stray capacitance into the signal circuitry at all when the 50Hz source on the mains live conductor has a pk-pk amplitude of nearly 700V (more than 7dB worse in the UK than in Japan, of course) !
VB
Not a song but less than the going rate for an unfucked one. Nick has agreed to a partial refund that may/should cover the cost of getting it back to stock.
my old preamps were originally built with a screened mains cable between IEC and on/off switch. One came back a few years ago with a big hum problem, turns out some cable junky had replaced it with £100 of unscreened foo mains wire 
it went back to original spec and all was silent again 
I only give the customers what they desire.
Hunting around for good picks of a minty M7 of the correct vintage, and I just came across this 
http://forum.soundup.ru/viewtopic.php?f=2&t=1193&sid=fb6f6d7139d5131ee644d7a92f4a55bd
That last picture of the underneath 
indeed!
but oddly it also has CV4024/12AT7/ECC81, E188CC in the phono stage, and a TKD pot
Minefield mate. Good luck!
and the power transformer rotated and replaced with a Tango one.
Mine was owned by a Russian so may have been the same guy who did that one as well. Does seem to be a rather bizarre mod though.
it’s going to be fun, especially replacing the missing 100 + 100 uF 350V Black Gate Heart of Muse cap 
that’s what I suspected, but apparently he didn’t go all in on yours
Small blessings I suppose 
not sure why he used a 12au7/e80cc and some great lump of an oil filled cap though.
Have seen some M77 DIY schematics that use the e80cc though so he may have tried to copy that.
I might be wrong but I’m not sure Kondo himself ever used many Black Gate caps. Cerafine maybe.
I think he did in the power amps (going by some photos I’ve found) but trying to find 4x Elna 100+100 caps is probably going to be much harder than finding one BG wkz
Can’t make out what these are???
I’ve seen them in M7s, though the Ongakus I’ve seen have cerafines.
I actually have a 220uF+220uF 350V Black agate on a shelf which belongs to a friend and is for sale and could possibly substitute.
That M7 has Nipon Chemicon electrolytics,
the current Kondo amps use Unicom, which can be bought from Acoustic Dimensions in NL
The really old ones have Black Gates, then a lot have Cerafines, probably after Rubycon stopped the BGs, then Nipon Chemicon and now Unicom
Overall I think I generally prefer the Cerafine
I have a couple of 100uF 500v BGs, a couple of 47+47uf 500v Cerafine a few 220+220uf 350v Cerafine.
If we cant find a 100+100 BG I would probably go for the 47+47 cerafine as first cap after the 6x4 rather than a 220+220, then have the 3 BGs as the last caps in the psu connected to the valves
