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Summary of Contents for ORANGE VALVE TESTER MKII
- Page 2 Ever since the founding of the company in 1968, Our commitment to craftsmanship and quality control has allowed our products to stand the Orange has been a pioneering force in the guitar test of time, giving their owners as much amplification industry. Today, with a team of the pleasure now as the day they were bought.
- Page 3 WHAT’S IN THE BOX 1 x Valve Tester MKII 1 x Power Supply 1 x Mains lead 1 x Manual 1 x Pencil...
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Page 4: Important Safety
IMPORTANT SAFETY The exclamation point within an The lightning flash with arrowhead The “Caution, hot surface” symbol equilateral triangle and "WARNING" are symbol, within an equilateral triangle, indicates the marked item may be hot. intended to alert the user to the is intended to alert the user to the presence of important operating or presence of un-insulated ‘dangerous... - Page 5 The Orange Valve Tester MKII (VT MKII) supply input is Warning valves can get hot during testing, ensure they 19V DC 65W. The DC input socket is centre positive are cool to handle before removing from the valve tester. polarity and the barrel plug is a ‘standard 2.5mm type.’...
- Page 6 WHY CHOOSE THE ORANGE VT MKII? Commercial valve testers have been available, almost since valves were invented, incorporating many excellent techniques and designs over the years. However, the vast majority have a number of common features, which we considered to be a barrier to the modern valve user namely: •...
- Page 7 We are passionate about valve technology and our aim The simplicity of operation belies what is going on throughout has been to make the Orange VT MKII a ‘inside the box’, where a sophisticated microprocessor sophisticated, modern, truly portable valve tester Ⓡ...
- Page 8 BEFORE USING YOUR VALVE TESTER With the VT MKII, Orange has designed a compact, safe and simple alternative to the large, dubious and complicated valve testers of the past. However, despite its small size the VT MKII is a highly accurate and sensitive piece of test equipment, and should be treated as such.
- Page 9 Any condensation which may occur on the valve bases Do not test hot or warm valves. The VT MKII uses high or internally can influence initial results. Due to the voltages to ensure accurate readings from the valves thermal insulation properties of the packaging and the which are tested with the correct voltages as stated in high thermal mass of the metal case, the VT MKII may their manuals.
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Page 10: Controls And Functions
CONTROLS AND FUNCTIONS Valve socket for octal power valves. Valve socket for EL84 valves. Valve socket for pre-amp valves. Selected valve type text (both UK and US). Valve matching value (range between 1 & 15). Valve status result: GOOD, WORN, FAIL. Control buttons. - Page 11 VALVE SOCKETS & VALVE SELECTION VALVE SOCKETS PHYSICALLY DAMAGED VALVES No damage will occur to the VT MKII by testing faulty or damaged valves. EL34/6CA7; 6L6; 6V6/6V6GTA; KT66; Under no circumstances should any attempt be made KT77; KT88; KT120 to insert into the test socket or to test a valve which is 6550;...
- Page 12 It takes approximately two minutes for the tester to test tester and is switched on. Press the ‘OK’ button to start, a valve, during this time a number of orange LEDs will then by moving the left and right selector buttons illuminate and flash.
- Page 13 STEP 5 TEST STATUS Once the test completes and the green, yellow or red GREEN - If the green LED is illuminated this indicates indicator lights, then the test is finished; however, as that the valve is GOOD. valves may get hot during the test, we recommend that YELLOW - If the yellow LED is illuminated this indicates you make sure that the glass envelope is cool before...
- Page 14 NEW FEATURES ON THE VT MKII A more rugged mechanical design New enhanced grid leakage with improved test sockets detection test Improved algorithm with higher New microphony function for ECC81, ECC82 current capability and ECC83 and 12BH7 pre-amp valves Valve failure mode identification New thermal runaway test Capability to function with external Capability to test directly heated valves...
- Page 15 VALVE MATCHING NUMBER A ‘matching number’ indicated by the LED(s) at the end In general, the closer the LEDs are together the better, of the test, is based on a combination of measured if two matching valves are apart by more than 6 values parameters to give an indication of how the valve will the VT MKII will fail the valve.
- Page 16 MICROPHONY MODE To begin the microphony test insert the valve into When the valve is heated, the yellow light will go out and the PRE-AMP socket. (ECC81, ECC82, ECC83, 12BH7 the green will come on. The valve is now ready, tap the valves only).
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Page 17: Expansion Modules
EXPANSION MODULES The number 15 LED should then remain solid, LEDs 1-14 Insert the expansion module, then select number 15 will flash. to start the test press the OK button. using the right arrow button. The yellow and green light Expansion modules are available to purchase separately. -
Page 18: Fault Log
FAULT LOG FAULT NUMBER REASON FOR FAULT ALTERNATIVE REASON 1 - Immediate fail Heater open circuit or value missing 1 - Fail during test Heater current below minimum valve for valve type Heater current too high Total or partial short circuit 3 - Pentode test Anode current exceeds max valve for valve type Internal leakage or short... - Page 20 orangeamps.com...
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