![]() I am also interested in Dayton Split Ring Wheels that fit 10.00-20 Tube Bias ply tires, they were very common in the 1960's and 1970's used on dump trucks and old farm trucks, grain trucks, etc. I am looking for some 10.00-20 Bias Ply Tube Tires in good condition. 10.00-20 Bias Ply Tube Tires Wanted - $1 (Lafayette).Having the correct voltage getting to your power tube. This is a Compu-Bias dual probe biasing tool that allows you to easily set your bias on a tube amplifier. I am cleaning up my shop and came across an amazing tool for setting the bias on tube amplifiers. Compu-Bias Dual Probe Tube Amp Biasing Meter - $150 (St.The BiasMaster(TM) allows to monitor the bias current savely and easily. Tube Amp Doctor Bias Master - $175 (Colorado City)īM4 Brand New In Box2 leads.Brand new in boxProduct information "BIASMASTER System"Measures BIAS current of the most power tubes in your amp.english/german operation manual.Near new except the normal scratches from. InstructionsOriginal owner and only used 3 times.Asharp BiasPro Q10 System for Tube Amp Bias - $100 (Salem)Īsharp QuadStage BiasPro Q10 with BiasPro 8C and PV8C Bias Probe CablesIncludes:.Vintage Peavey Road Master tube amp - $550 (Gonzales).Some use a higher plate dissipation point and understand that tubes wear faster that way.but they like the sounds they get with that hotter bias. Fwiw, redplating will not occur until plate dissipation is well above the 70% ‘rule’ that many use as a target or limit. This lets you set and evaluate the full reasonable biasing range your amp and tubes offer to find and set your personal. While adjusting the Bias control pot of your amp, the Bias Master shows the actual result. The Bias Master allows you to monitor the bias current safely and easily. One that does not measure plate voltage is an incomplete tool, and I can do as well with only my ears and eyes.ĭo not try this eyes and ears method unless you understand it well.and one has to know what redplating is. Includes 4 probes and english/german operation manual. Hence my thought that a bias probe with plate voltage measurement is a complete tool. I do not suggest that others use the shunt method, but then if one does not have a bias probe setup that reads plate voltage one is going to be measuring live circuit voltage anyway.and I do not suggest that people do that either unless they are experienced and comfortable working with live circuits. It works, and as robrob notes in his comparison of the shunt method to the method that measures OT resistance, the results are within 1 percentage point of each other. However, I did this only as an exercise and have always checked the numbers with a meter. I have used this method over the years enough to know what my results will be with my ears. A more experienced player might even be able to set the bias by ear and have it somewhere very close to some known range of plate dissipation. ![]() But.the amp will work and the sound that is created may please the player’s ears. The problem with this ‘biasing with eyes and ears’ is the same problem with biasing without knowing the plate voltage.one does not really know where the tubes are operating. My ears will put the amp somewhere in the 55-65% of max plate dissipation range, ime. The advantage of this system is that it brings the player’s ears into the equation.and that is the ultimate point, correct.sound. Within the boundaries of crossover distortion and imho redplating, one can find what they feel is a good sound for them. , long before that the amp is not sounding as I want it to sound. At some point and if the bias pot allows it, you will cause the amp to incur crossover distortion.things get harsh and imho unmusical. Lower current draw is easier on the tubes. The amp is safe to play at any setting from there on ‘down’.decreased current draw will cause the amp’s Sonics to creased harmonic content. ![]() Note: in fix3d bias, current draw increases while signal is being process as compare to current draw at idle. If redplate begins while you are playing, decrease the draw very slightly until,playing does not bring on redplate. If the plates do not go into redplate condition while playing, ![]() Back away from that point and play while watching the plates. Once you know that, gradually turn the bias adjustment in that direction until the plates just begin to show some redplating. Increasing the draw will bring on a bigger, richer Sonic. Then, turn the bias pot a small bit and play it to find out which direction one should turn the pot to increase or decrease the current draw. ![]() All you need is the amp, a guitar and a tool to turn the bias pot. Okay, I’ll suggest the easiest way to bias an amp.since biasing without knowing the plate voltage is about the same thing. Tube Amp Doctor Bias Master System Misuratore Di Corrente Di Bias Bm2 El84 Brand New 217.59 + 100.17 Shipping 2. Tube Amp Doctor GmbH In Stock Price from 195.01 to 2866. ![]()
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