![]() ![]() 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. Lab grade accuracy, current range of the meter is within the suggested range of all amps. 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. Highlights include: Digital meter display, no voltmeter or digital VOM needed. ![]() ![]() 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. It is the top of the TAD bias meter line, the Bias Master, with no less than four octal test sockets. 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. P.S.¡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. Maybe with older amps this could be more useful, but I think it is nothing that you are not able to do with good quality multimeter. This might be a stupid question, but could someone clarify me that why someone wants to read the plate voltage each time you set the bias for your amp's tubes? Ain't that fixed and if everything is OK it should remain that way? I think that usually this information can be found from manual or by asking from the manufacturer (esp. Also, sometimes I have been a bit surprised about the matched quartet of tubes not being that well matched and those are the cases when the 4 "simultaneus" probes are handy. I would also argue that to certain level it may be said that these products are safer to use. have is that they have the possibility to measure each tube separately, but still in a way "simultaneously" without turning the amp off and changing the probe to other tube. The main advantage I consider that these bias masters, rites, etc. Speciality product in niche market often leads into speciality price. My personal opinion is that it is good product that has its place on market (as well as the Weber's product, etc.), but people do have issues with accepting the set price-level. multimeter I don't see much reason why to purchase any of these unless you have additional cash and are biasing rather often. Extremely expensive as there is nothing fancy, but it is easy and fast to use. ![]() What's your favourite one? Please share your experience and suggestions, it may help a lotta folks out there (me included ). Other features can be found on the product pages. REPLACEMENTS: $35 + shipment for a dual octal probe TUBES SHOWN/TESTED AT THE SAME TIME: 2 (with one Dual octal probe) or 4 (with two Dual octal probes) the unit automatically recognizes how many probes are connected. PRICE: $150 (control unit only) + $35 (dual octal probe) + shipment REPLACEMENTS: $29.99 + shipment for a single octal probe REPLACEMENTS: €35,00 + shipment for a pair of octal spare probes ( EQBMP) REPLACEMENTS: €49,00 + shipment for a pair of octal spare probes ( BMA2) REPLACEMENTS: $25 a head + return shipping (the unit needs to be sent back to factory to be fixed) Weber Bias Rite BR-4 (octal) ** DISCONTINUED ** Well, I'm looking for a good bias probe for my VH4 and this is what I found (please consider I used the 4-probes version where available as suggested by Papa Peter himself We started talking about this stuff in another bias-related thread, but I thought it would have been useful to open a new one as a point of reference for all the users. ![]()
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