![]() The TAD Bias Meter is not recommended for those without training in basic electronics, amplifier servicing, or those not qualified or trained to work on electronics. There are dangerous voltages inside of any amplifier, and opening an amp exposes the user to these hazardous voltages. NOTE: This test instrument is only recommended for those who have electrical safety training. Housed in a compact, handsome and rugged case. Set bias quickly, or match pairs of tubes using your own amp and this meter! Owner's manual included. Works in any country of the world since it does not use the AC mains for power. ![]() Install easily in your amp, then plug the power tubes into them. Four octal sockets connected by audio grade heavy cable. Tube Amp Doctor Transformer 230/115V 1000VA. Lab grade accuracy, current range of the meter is within the suggested range of all amps. This model comes with 4 octal probes, but I ordered 2 noval probes as well so that I can set up EL84s as well as 6V6s and 6L6s etc. FOUR cabled sockets included, front panel rotary switch to display plate current of each tube! Measures true plate current under load in your own amp, the most accurate method to match power tubes. Just for refrence I can check to neg bias at abot -29 volts (while insereis with bulb on) so everything appears fine. Tube Amp Doctor GmbH In Stock Price from 195.01 to 2866. Highlights include: Digital meter display, no voltmeter or digital VOM needed. I put new caps in and use a light bulb in sereis to soft power up the amp which seems to work fine. It is fast, accurate, and easy! Precision manufactured in Germany, with instructions in English and German. No AC mains connection needed so this meter can be used anywhere in the world. You merely switch the rotary switch to select any of up to four tubes under test at the test meter to display the plate current of each tube. Turn on the amp, then check and adjust the bias current balance using the lab grade accurate digital meter display. Can be used with guitar amps or hi-fi amps! You merely install the bias tool sockets into each pair of power tube sockets in your amp (up to four tubes at once), and then install the power tubes into the amp through the bias sockets. This unit is remarkably quick and easy to use. It has a fully digital display for ease of reading and matching up to four tubes at once, plus FOUR rugged cables with the test sockets attached. Measures the bias current of any EL84, etc. Mit dem BiasMaster (TM) kann man den Bias-Strom problemlos messen und mit dem Bias-Potentiometer oder Trimmer auf den Wunscharbeitspunkt einstellen. Lieferumfang: Megert, deutsche + englische Bedienungsanleitung. Megert mit Sockeladaptern zur Kontrolle des Ruhestroms bei Endstufenrhren. It is the top of the TAD bias meter line, the Bias Master, with no less than four octal test sockets. Testing tool with backlighted display and two noval measurement adaptors. Produktinformationen 'BIASMASTER System'. This is a brand new currently manufactured unit, not used or refurbished, and we have many of these in stock. As power tubes age, the bias should periodically be rechecked and adjusted as needed, or the tubes replaced if they have drifted out of tolerance. Any time you replace power audio tubes the bias of your amp should be checked and/or adjusted. BIAS MASTER is a registered Trademark of the Tube Amp Doctor Musikhandels GmbH, 67551 Worms, Germany. The real skill is knowing just where to set the current level, which is of course different for each and every valve type and can be slightly tweaked for your preferred sound.¡PRODUCTO BAJO PEDIDO! PLAZO DE ENTREGA ESTIMADO DE 5 A 25 DÍAS! This very cool FOUR socket test meter lets you regain control over your amp's sonic output. ![]() It's really simple and easy to use (as another reviewer has said) and you don't have any high voltage connections to make through a test meter. The readout on the unit is 00.0 mA to presumably 99.9 mA.Ī "Chicken head" pointer knob selects each of the 4 individual valves, or the OFF position. Then you can balance up each side of the push-pull stage. This is a good starting point, but then you need to find the valve manufacturer's specifications from their data sheets. The 1.8M Safety resistors allow bias voltage to pass around the master volume. Circuit schematic diagrams usually state a bias Voltage (e.g. WARNING: A tube amplifier chassis contains lethal high voltage even when. The probes each contain a 1 ohm resistor in the cathode lead, so they are measuring total cathode current (anode + screen grid). You can download them from the TAD site, 2 sides of A4 folded into a leaflet. WARNING! - There are no instructions! - If you don't know what you are doing, don't try to use this unless you have a friendly tech to show you. This model comes with 4 octal probes, but I ordered 2 noval probes as well so that I can set up EL84's as well as 6V6's and 6L6's etc.
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