"Patrick Turner" wrote in message
...


Mike Gilmour wrote:

"Patrick Turner" wrote in message
...

Expect thats the new bottles giving out the smell, had the same thing
happen here when I installed 8 new KT88's..the stink was 'orrible but
it
went away after about an hour. Funny that, because it's the first
time I
had quite that strong smell from new power valves...probably a bit of
burnt
bean sauce and rice wine after the factory lunch break :-) ......If
they
have one that is!

Mike

Smelly amps after turn on indicate the tubes have not even been tested
properly.


Yes that makes perfect sense. I'm in a habit of testing before use anyway &
giving power tubes a fairly easy start in life. I've generally found tube
suppliers to be fine exchanging defective or sub-standard bottles but I'm
not happy about the new possibility of premature tube death due to
improperly tested tubes..



I hope they last.
Chinese KT88 copies had a reputation for having a 40%
failure rate over 12 mths.

Dunno Patrick I went back to Svetlana's 6550C's again because I lost at
least 50% of the dynamics with the '88's but gained some (psudeo?) 'air',
IMO not worth the trade. Tried KT90's which went far too far in the
other
direction :-)

The problem is that chinese amps might look nice, even sound nice,
but the detailed examination of the circuit and output transformer
quality
often leaves a lot to be desired.

They seem to be improving slowly.

Get over there, you'd make a shed load of cash designing machines to make
wide band width OPT for future audiophile amplifiers

The designs for these have been common knowledge for 60 years at least,
and all the info on how is spelled out in RDH4.



Manley are very guarded about exactly how their recent OPT's are
manufactured. I guess though its just variations on a theme of RDH4 :-)


But the chinese like to make copies, and they overlook the inner details,
and some of the product is like a Rolex watch made in HK.


Fine 'til the gold turns green and the cockroach dies ;-)



Mechanised winders for transformers have been around for years,
and the asians don't need lessons or lectures from me.


Not the finer points of interleaving, bifilar etc. ;-)



The Zero was no match for a Huricane or Spitfire eh.


Ah - we've been there before Patrick...a long long thread, some time
ago.....


Patrick Turner.

. s ei




Patrick Turner.