Amplitrex Audio Products - AT1000 Vacuum Tube Tester

Many tubes I thought were good were instead junk! Severe sectional mismatch,
one section dead, etc. Now music is sooooooo smooth and coherent, like gentle
Spring wind over a green meadow, like the velvety space between stars in a
cloudless night sky.

I have done all the matching to all the tubes within my system, some are
replaced, some have their positions relocated. Gosh, the difference is like
changing to another system! We definitely have overlooked the importance of tube
matching and testing in the past. Many of us have spent thousands of dollars
pursuing famous tubes without paying any attention to their condition in great
detail (most of us just test emission, shorts and gas). This is a major cause of
imperfection.

AVO, Hickok or BK are outdated, they just give relative values, no standard
calibration, tube sellers using their own testers can easily cheat customers.
Besides, vintage testers haven't got the optimal voltage to really push the tube to
its working condition, I doubt their results. I tried to match tubes with TV7 and
that did not bring any improvement to my system. With AT1000, the improvement
can easily be spotted by laymen. AT1000 is a must-buy for tube manufacturers,
honest tube sellers and a dedicated tubephile. Any audiophile who claims to love
the sound of tubes without seriously testing the tubes is an act of superstition, a
practice of tube-worshipping without casting any doubt on the truthfulness of
sound quality. As a musician, one would doubt the quality of glue used to
refurbish his Stradivarius, as an audiophile, we should strive for the highest
quality tube with best condition, which only AT1000 can prove.

AT1000, a state of Art tester connecting vintage music components with modern
technology, the most accurate, precise, user-friendly and trustworthy instrument
...you have done something not even Fluke or Tektronics can achieve for the audio
community.

Why are people listing things like a 2000USD AVO or Hickok on ebay, and why are
people buying them? ...go and retire those stone age testers.

-- Allan So, Hong Kong

"...This tester will test the tubes at HIGH VOLTAGE. Most tube testers don't have
this capability. So when your amp gets shipped the tubes have been tested and
matched under the same high voltage load the amplifier is going to be running the
tubes at."

-- James West, http://bonepickerguitaramps.com/Home.html

"I received the AT1000 yesterday and had a chance to try it out. I'm very
impressed! It's so easy to use and compact unit with far more capability than the
vintage testers. You did a great job designing this tester!"

-- David Shapiro, bgn007a@verizon.net

		Tests hundreds of popular Audio, Guitar, Organ and Radio Tubes
		Optimized to precisely test audiophile-grade tubes
		Tests tubes at real-world power levels, up to 500V @ 160mA
		Direct digital readout of true Mutual Conductance (1 kHz AC signal)
		Also meausres Heater-to-Cathode Leakage, Emission and Gas
		Listen to tubes for microphonics (1/4" stereo phone jack provided)
		Tests multi-section tubes, diodes, rectifiers and electron ray indicators
		Fully regulated power supplies - no line adjustment needed
		Protected against shorts and overheating
		Routine calibration is not required
		Heater power from 1.0 to 12.6V, up to 3.5A
		Built-in user-programmable Tube Data Lookup
		Processor-controlled tube pin control. No switches, no rewiring.
		Available for 115 or 230V, 50/60 Hz (specify when ordering)
		Portable, compact carrying case, shipping wt. 23 lbs. (10.5 kg)
		Rugged, high-quality industrial construction
		RS232 port for connection to a personal computer
		Free TubeTest(c) Computer Test and Curve Plot Software included
		Free software to print labels with the Brother P-touch Label Printer
		Free TubeData Editor software, to modify tube tests and add tubes
		Sfotware requires a PC computer running Windows 98, XP or Vista
		Designed and manufactured in the USA