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Question from customer June 2006 = Hi Mr Lim,
I was wondering how the repairs/upgrade to my amp were going.
Many thanks
Steve 
Answer =  I apologise for the premature failure of the Russian Svetlana valves / tubes,
after 15 months. (We were expecting it to last 2 or 3 years, if you switch on the amplifier for 3 hours a day)
We have stopped using Russian Svetlana valves / tubes.
We pride ourselves on the reliability of our valve amplifier (and our valves)
and we guarantee our amplifier AND VALVES for 2 years,
(unlike most of our competitors who guarantee their valves for a laughable 90 days),
so, we have collected your amplifier FREE OF CHARGE,
put in a NEW set of GBP 160 of KT88 valves FREE OF CHARGE,
and we will deliver your repair amplifier FREE OF CHARGE.
Your amplifier has been repaired
with our BEST SUPERIOR RELIABLE CHINESE VALVES,
'soak tested' for MANY MANY DAYS
and is working 100 percent reliably.
Since the disintegration of the Soviet Union,
thing have been getting worst and worst in the former Soviet Union.
There has been insane civil wars, insane massacre of thousands of civilians,
dangerous nuclear powered submarines, civil servants not paid for months, etc.
The quality of Russian Svetlana valves / tubes has gone downhill,
since the disintegration of the Soviet Union.
We still have wasted thousands of pounds on
unusable (does not met with our high standard)
Russian Svetlana valves with black blotches on the 'silvering'
(from the OFFICIAL British importer)
and / or
VERY poor transconductance
(produces A LOT OF ?NICE? WARM SECOND HARMONIC DISTORTION)
(some people will like the ?nice? warm sound of 2nd harmonic distortion)
(from the OFFICIAL American importer of valves / tubes made in the Svetlana factory in St. Petersburg, Russia.)
( Can any body make me a REASONABLE offer for these Svetlana valves / tubes ? )
We also wasted thousands of pounds on Russian Svetlana branded valves / tubes
that are NOT made in the Svetlana factory n St. Petersburg, Russia,
and we are not happy with the quality of these Svetlana branded valves.
( Can any body make me a REASONABLE offer for these Svetlana branded valves / tubes ? )
We have stopped using Russian Svetlana valves,
and we have changed over to
our BEST SUPERIOR RELIABLE CHINESE valves / tubes,
which usually have MUCH MUCH MUCH HIGHER TRANSCONDUCTANCE (MUTUAL CONDUCTANCE)
Higher transconductance (mutual conductance) means
our SUPERIOR RELIABLE CHINESE EL34 produce MUCH MUCH MORE BASS
Higher transconductance (mutual conductance) means
our SUPERIOR RELIABLE CHINESE valves
produce MUCH MUCH MUCH LOWER MEASURED DISTORTION
in our valve / tubes amplifiers.
The lower measured distortion means MUCH GREATER CLARITY of human voices.
Based on our constant quality control checks, we found that 
Russian Svetlana valves / tubes USUALLY' produces about 2 to 3 times more distortion.
(or even 4 or 5 times more distortion for some valves ?matched ? by ? the ? OFFICIAL ? importer?)
( so we have to reject the unsatisfactory ?matching? and match the valves ourselves)
than our BEST SUPERIOR RELIABLE CHINES VALVES
when used in our amplifiers.
Some people like ?nice? 'warm' second harmonic distortion,
but people with Golden Ears can hear that
?nice? warm second harmonic distortion
makes human voices sound blur , congested (like the singer has a blocked up nose)
We have replace ALL the 4 Russian Svetlana valves
with 4 of our BRAND NEW superior reliable Chinese valves,
and 'soak tested' your amplifier with our SUPERIOR RELIABLE CHINESE VALVES
for many many days, and everything is working 100 percent reliable
and the sound is marvellous
( PLEASE GIVE US 48 HOURS NOTICE.)
Please tell us a date,
when you want us to send the amplifier.
( PLEASE GIVE US 48 HOURS NOTICE.)
The courier MIGHT (or might not) deliver on the next working day,
because you live far away away from a large town.
I also apologise for the problems in the collection,
that was partly caused by courier,
and partly caused by me ( I did not know that I had to book a collection BEFORE 7 a.m.)
( The couriers computer will AUTOMATICALLY book the collection in almost all cases,)
( except for customers who live very far away from couriers nation wide depots.                )
( In most cases, the collection is 90 percent reliable, and the courier turns up on the agreed date.)
( I apologise for the large number of problems your collection.)
Since we have sold you your amplifier,
we have made one minor improvement.
We have changed the value of one of the MANY ultrasonic filter.
If you want, we can bring your amplifier up to date
for only GBP 50.
THIS GBP 50 IS 100 PERCENT OPTIONAL,
but I think that it is well worth GBP 50,
for SLIGHTLY nicer treble (for more people)
or 30 percent to 50 percent improvement (for VERY fussy listener)
(about 10 to 1000 times bigger than changes to cables, volume controls, changing plastic capacitor in GOOD WORKING ORDER, etc)
If you want the GBP 50 upgrade,
PLEASE GIVE US AN EXTRA DAY NOTICE.
Thank you, and a thousand apologies
for the premature failure of the Russian Svetlana Valves / tubes,
and I assure you that
our Chinese valves in our WELL DESIGNED amplifiers are VERY VERY VERY RELIABLE.
( Our valves / tube amplifiers have been designed for reliability)
( and is one of the few valves / tube amplifiers that )
( are guaranteed for 2 years INCLUDING THE VALVES.)
(Replacement valves are only guaranteed for 1 year.)
(Most of our competitors valves / tubes are only guaranteed for laughable 90 days.)
( Who do you think uses the better made valves / tubes ? )
Best of all,
our BEST SUPERIOR RELIABLE CHINESE KT88
+ the GBP £50 modification to the value of one ultrasonic filter
SOUNDS 20% to 200% BETTER (depending on how fussy you are)
THAN RUSSIAN SVETLANA VALVES.
MUCH IMPROVED CLARITY OF HUMAN VOICES,
( that was VERY SLIGHTLY congested (sound like the singer has a SLIGHTLY blocked up nose)
( has disappeared with our SUPERIOR RELIABLE CHINES VALVES.                          )
WITHOUT ANY HARSHNESS WHATSOEVER.
( There is a fine dividing line, between crystal clear clarity versus harsh sound          )
( This is 100 percent crystal clear human voices WITHOUT ANY HARSHNESS, )
( especially with the OPTIONAL GBP £50 change to the ultrasonic filters.             )

 
 
 
£900 "KT88 Triode Connection - Lim Signature"
valve amplifier for Valve Aficionados


We have already received many testimonials 
from customers who have replaced their
TRANSISTORISED Preamplifier & Power amplifier
or TRANSISTORISED Integrated amplifiers
made by Naim, Quad, Audiolab, Arcam, Musical Fidelity
with our EL34 valve amplifiers ! 
Many valve aficionados will "pooh-pooh" our achievements by saying
"anybody, with half a brain, could develop VALVE amplifiers
that sound better than TRANSISTOR amplifiers !"
Our polite reply to these valve aficionado is
you have our money back guarantee (less £30 return carriage) that
you will prefer our
£900 "KT88 Triode Connection - Lim Signature" push pull amplifier
to most VALVE amplifiers selling for £2,000 to £20,000 !
Price is NOT a guarantee of Sound Quality.
 

Some products are overpriced.


The legendary
Svetlana KT88 valve
 

Our "money back" challenge applies to
almost any other type of VALVE amplifier selling for £2,000 to £20,000
including :-

EL34 Ultra Linear push pull valve amplifiers 
6550 Ultra Linear push pull valve amplifiers
Ultra Linear push pull valve amplifiers
using SMALL CHEAP power valves,
that produces a few watts at 5% distortion !
EL34 Single Ended valve amplifiers
                 (especially the poor quality of bass of many Single Ended valve amplifiers)
KT88 Single Ended valve amplifiers
(especially the poor quality of bass of many Single Ended valve amplifiers)
300B Single Ended valve amplifiers
 (especially the poor quality of bass of many Single Ended valve amplifiers)
"Proper" Triode Push Pull amplifiers should sound similar,
and they are excluded from our money back guarantee.
Unfortunately, "Proper" Triode Push Pull amplifiers sell for £6,000 and upwards !

 
 
 
What is "Triode Connection" ?

"Triode Connection" is NOT a new idea.
The most famous valve amplifier design must be
Mr Williamson's "KT66 Triode Connected" amplifier,
designed in 1947 !
Mr Williamson should know what he was talking about
because he worked for GEC (M. O. Valve Company),
that produced the famous KT66 , KT88 and PX25 valves.
When KT66 or KT88 valves are "Triode Connected",
they behave almost as good as "proper" Triode valves.
Since many of the modern Hi Fi enthusiast are overly obsessed with power,
we have used the more powerful KT88 valves.
Mr Williamson wrote
"It appears then that the design of an amplifier for sound reproduction to give
 the highest possible fidelity should centre round a push-pull triode output stage
 and should incorporate negative feedback.
 The most suitable types of valve for this service are the PX25 and the KT66.
 Of these the KT66 is to be preferred since it is a more modern indirectly heated type
 with 6.3 colt heater, and will simplify the heater supply problem.
 Triode-connected it has characteristics almost identical with those of the PX25."
( GEC PX25 is a triode, which is vaguely similar to the 300B triode. )
Mr D. T. N. Williamson is the most famous amplifier designer in the world.
Many other amplifier designers have copied Mr Williamson's design.
Who am I to argue with Mr Williamson's conclusion ?
Boring technical explanation that can be ignored by most people.
"Triode connected" KT88 valves are very linear (less distortion).
The "valve characteristic curves" of "Triode Connected" KT88 valves
are more evenly spaced than "Ultra Linear Connected" KT88.
( This means more linear, less distortion. )
The characteristic curves of the valves are more "vertical"
so the output impedance is lower,
so you get deeper bass
because of the limited inductance of the output transformers.
Before any "expert" tell me that Ultra Linear connection is better, please could
they compare the "valve characteristic curves" of KT88 Triode Connected
versus KT88 Ultra Linear connected.
And if the "experts" do not know how to interpret "valve characteristic curves",
they needn't waste my time with their "learned" arguments  !

 
 
What are the "Svetlana KT88" valves ?

Ignoring some insanely priced 300B valves,
Svetlana KT88 are the next most expensive popular "current production" valves.

Most sane people will agree that
Svetlana KT88 are amongst the BEST "current production" valves.

The "grid" is gold plated !  This is NOT a fad !
There is a good technical reason.
 

Technical explanation that can be ignored by most people.
The grid is very close to the hot cathode,
so the grid gets hot,
and starts to emit electrons (like a hot cathode !),
and the electron emission is the "grid current" !
Gold plating the grid reduces the emission of electrons
(which causes the grid current)

The legendary
Svetlana KT88 valve
-
McIntosh uses EXPENSIVE Svetlana KT88 in their £10,000 amplifiers.
The "new" version of the £4,000 Quad II-forty uses their own branded version of KT88 valves
(and not Svetlana KT88).
The old Quad II uses the cheaper and lower powered KT66 valves. 
Svetlana KT88 are 50% to 100% MORE EXPENSIVE
than the 6550 valves used in American amplifiers that cost £2,500 to £20,000 !
Why don't you audition
our £900 "KT88 Triode Connection - Lim Signature"
against these 6550 valve amplifiers,
and let YOUR EARS decide "which is the better valve" !

 
 
 
 
 
 
 
What are the disadvantages of KT88 Triode Connection ?

If you switch on the amplifier for 3 hours a day,
you should replace the set of Svetlana KT88 every 2 to 3 years,
at a cost of £160.
If £160 is too much for you,
the replacement cost of valves for our EL34 amplifiers is only £50
We can easily get 40 watts out of the Svetlana KT88,
if we connected it in the popular "Ultra Linear" mode.
However, if you have good quality speakers (of any "normal" sensitivity)
then you will hear the improved quality of the "Triode Connection",
even though the "Triode Connection" will reduce the power from
40 watts to 20 watts.
Before anybody (who has never measured how much power you actually listen to)
complains that 20 watts is not enough,
you have our money back guarantee that
our 20 watts (with good bass) is more than enough to annoy your neighbours !
Beside, the "typical" 6.5 inch drive units will NOT handle 20 watts (with good bass),
regardless of the stupid absurd claims of speaker manufacturers !
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