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VHT TUBE TESTER 2

MONITOR YOUR OUTPUT TUBE PERFORMANCE

The VHT Tube Tester 2 provides two completely independent current-measuring tube tester

sections. Simply plug your tubes into the adapters and then plug the included 8-pin octal-based

adapters into your amp.

The two high-quality analog milliamp meters measure the tubeʼs cathode current. You can use

these measurements to observe your tubeʼs real-time dynamic performance, see how well theyʼre

matched, adjust the bias, monitor your tubeʼs performance as they age, check for unstable

conditions, and more.

Additional test-pin jacks are provided for precise digital multi-meter measurements and analog

meter calibration.

The VHT Tube Tester 2 is an affordable bench and road tool that lets you see how your output

tubes are performing in real time, and whether itʼs time for replacement or a bias adjustment, etc.

Get the most from you tubes — and amplifier — with a VHT Tube Tester 2.

SET UP

Setup is easy, simply unplug your output tubes and carefully plug them into the Tube Tester 2ʼs

adapters, then plug the adapters into your tube sockets.

Pay close attention to the tubeʼs aligning guide pin, and be sure the adapters are aligned correctly

with your tube sockets. (An incorrectly installed tube or adapter can cause serious damage to

your amp and/or tubes.)

Some tubes may be a tight fit in the adapter. Tube pin diameter varies slightly between different

tube manufacturers, and sometimes there will be some excess solder on the pin. For an easier fit,

you can file-down excess solder with an ordinary fingernail file.

After the tubes and adapters have been properly secured, connect the adapterʼs banana plugs to

the meter unit.

Test-pin jacks: For precise digital measurements and analog meter calibration, plug a DMM

(digital multimeter) into the front panel test-pin jacks and set the DMM to its millivolt range; the

test-pin jacks measure the voltage drop across a 1-ohm precision cathode resistor, 1 millivolt = 1

milliamp cathode current.

You can also plug the adapterʼs banana jacks directly into a DMM (set for milliamps).

OPERATION

While other tube testers test your tubes externally, the truest and most relevant test is how your

tubes perform in your amplifier.

The Tube Tester 2ʼs high-quality analog meters provide a unique window into your tubeʼs

performance. Analog meters provide a much better view of your tubeʼs dyna mic response than

digital meters (which are still useful for precise measurement of stable idle currents and voltages,

and also for meter calibration).

After the tubes and adapters have been installed properly, power-up the amp as usual.

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Résumé du contenu

Page 1

VHT TUBE TESTER 2 MONITOR YOUR OUTPUT TUBE PERFORMANCE The VHT Tube Tester 2 provides two completely inde

Page 2

OPERATION, CONTINUED Observe the meters as the tubes warm up and slowly begin to draw current. The meters will show a gradual rise in current until th

Page 3

PLATE DISSIPATION AND ADJUSTING THE BIAS Fixed biased amps are typically biased below the maximum plate dissipation rating; typically between 50% to 7

Page 4

LIMITED WARRANTY INFORMATION The Tube Tester 2 is warranted to the original purchaser to be free from defects in materials and workman

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Vht Tube Tester 2 Manuel d'utilisateur

Naviguer en ligne ou télécharger Manuel d'utilisateur pour Accessoires pour la musique Vht Tube Tester 2. VHT Tube Tester 2 User Manual Manuel d'utilisatio

Résumé du contenu

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