• Wish list
  • gb
    Choose your store
    All countries
  • 0

TAD Bias Master BM4

Measuring Device For Bias

  • Four octal socket adapters
  • For the control of the retirement
  • At 6L6GC, 6550, EL34, 6V6 GT, 5881, KT88, KT66, KT90, KT100, 7027A
  • With illuminated display
  • Made in Germany

Customers that were interested in TAD Bias Master BM4, have then bought these products

TAD Bias Master BM4 51% bought this exact product
TAD Bias Master BM4
Available immediately
Available immediately

This item is in stock and can be dispatched immediately.

Standard Delivery Times
€144 Add to Cart
Orange VT1000 Valve Tester 18% bought Orange VT1000 Valve Tester €399
Fender Orange Bulb 6,3V 12% bought Fender Orange Bulb 6,3V €9.90
Millenium Go-Kart Solo 9% bought Millenium Go-Kart Solo €38
Tube Amp Doctor Amp Corner Set 5% bought Tube Amp Doctor Amp Corner Set €7.30
Our most popular Accessories for Guitar Amplifiers
54 customer ratings:
  • 5
  • 4
  • 3
  • 2
  • 1
4.5 / 5.0
  • quality
29 written ratings Read all reviews
Total
quality

TAD Bias Master BM4

Robert814, 09.03.2014
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.
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. You can download them from the TAD site, [LINK] only 2 sides of A4 folded into a leaflet. Very basic instructions.
The probes each contain a 1 ohm resistor in the cathode lead, so they are measuring total cathode current (anode + screen grid). Circuit schematic diagrams usually state a bias Voltage (e.g. -37Volts) rather than current. This is a good starting point, but then you need to find the valve manufacturer's specifications from their data sheets. Then you can balance up each side of the push-pull stage.
The readout on the unit is 00.0 mA to presumably 99.9 mA.
A "Chicken head" pointer knob selects each of the 4 individual valves, or the OFF position.
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 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.
Helpful · Not helpful · Report review
Report rating…

Do you believe this rating to be inaccurate or unacceptable for some reason?

Send report
Total
quality

It`s okay

Amateur Slash, 27.05.2017
Unfortunatelly there aren?t too many options on the markt to choose from.
Would have preferred a tool that can measure the plate voltage too.
It does though what it says in it?s title therefore i?m quiet satisfied with this product.
Quality of the material has a bit of a cheap expression.
Color coding or numbering would have been preferable for the cables.
Helpful · Not helpful · Report review
Report rating…

Do you believe this rating to be inaccurate or unacceptable for some reason?

Send report
€144 £129.08
Price includes VAT, shipping costs extra

£ price – guideline price only

Available immediately
Available immediately

This item is in stock and can be dispatched immediately.

Standard Delivery Times
Share this product
Your Contact People
Phone: +49-9546-9223-20
FAX: +49-9546-9223-24
Offers include 20% British VAT and are valid as long as stocks last. Shipping costs to the U.K. are 10 EUR (approx. £7), free shipping on orders above 199 EUR. Please click here for international Shipping rates. We do not accept liability for typographical errors or inaccurate information of any kind. *RRP = manufacturer's / distributor's recommended retail price in Germany
the box pro DSP 112 Behringer DeepMind 6 Roland Go Piano Boss MS-3 Multi Effects Switcher JBL LSR 305 White Limited Edition Gretsch G5420TG Electromatic LTD CAR Fluid Audio Strum Buddy Baton Rouge UR1-S smile-bws Behringer DeepMind 12D tc electronic Flashback 2 Delay M-Audio BX8 D3 Chapman Guitars Ghost Fret Black Blood
(1)
Recommended
the box pro DSP 112

Active full range loudspeaker Power: 1200 watts, Class D power amp, Speaker assembly: 12 "woofer and 1.35" compression driver, Built-in DSP with 4 presets and low cut, 2 XLR jack inputs, 1 XLR output, Maximum level: 134 dB, Radiation...

to the product
€221
(1)
Recommended
Behringer DeepMind 6

Behringer DeepMind 6; 6 voice Analogue Synthesizer; 37 semi-weighted full-size keys featuring velocity sensitivity and after-touch; 4 FX Engines powered by tc electronic & Klark Teknik; 12 oscillators - two OSCs and LFOs per voice; selectable 2- or 4-pole low-pass...

to the product
€745
Recommended
Roland Go Piano

Roland Go Piano Digital Piano - 61 keys (Ivory Feel and Box-shape Keys with velocity), 128 voices polyphone, bluetooth 4.2, Midi: Conforms to GM2, Sounds: 10 Piano, 7 E-Piano, 7 Organ, 16 Other (incl. Drum Set and SFX Set), multi-effects/chorus/reverb,...

to the product
€298
(1)
Recommended
Boss MS-3 Multi Effects Switcher

Boss MS-3, effects pedal, Multi Effects Switcher, Pedal board effects loop switcher with 112 built-in effects for guitar & bass including tuner, noise reduction, global equalizer, midi, amp switching, USB connector & editor, controls: Knob 1 to 3, switches: On/Off...

to the product
€444
(3)
Recommended
JBL LSR 305 White Limited Edition

JBL LSR 305 White Limited Edition, Two-Way Powered Studio Monitor with 5" Woofer, 1" Soft-Dome High Frequency Transducer, 43Hz-24kHz, Class D Power Amp: 41/41W (LF/HF), Max Peak SPL: 108 dB SPL (C-weighted), Magnetic shielding, Level Control, LF trim (+2dB/-2dB), HF...

to the product
€129
Recommended
Gretsch G5420TG Electromatic LTD CAR

Electric Guitar Limited edition, Hollow body single cut, 5-Ply maple body, Body size: 16" (40.64 cm), Maple neck, U-neck profile, Rosewood fretboard, Fretboard radius: 305 mm/12", 22 Medium jumbo frets, Pearloid Neo-Classic Thumbnail inlays, GraphTech NuBone nut: 43 mm,...

to the product
€990
Recommended
Fluid Audio Strum Buddy

Fluid Audio Strum Buddy, electric guitar monitor/amplifier powered by a re-chargeable battery, suction cup mounted, ca. 3,5 hours of play time on one charge, channels: 1, power: 6 watts, equipped with: 40 mm Neodymium Magnet speakers, construction: ABS plastic housing,...

to the product
€85
Recommended
Baton Rouge UR1-S smile-bws

Soprano Ukulele Body: Basswood, Neck: Okoume, Fretboard: Walnut, 12 Frets, Open guitar machine heads with black buttons, Scale: 34 cm, Nut width: 3.5 cm, Aquila strings in Boomwhackers colours (G = green, C = red, E = yellow, A...

to the product
€52
Recommended
Behringer DeepMind 12D

Behringer DeepMind 12D; 12-voice Analogue Desktop Synthesizer; 4 FX Engines powered by tc electronic & Klark Teknik; 24 oscillators - two OSCs and LFOs per voice; selectable 2- or 4-pole low-pass filter per voice, shared high-pass filter; 8-channel modulation matrix;...

to the product
€955
Recommended
tc electronic Flashback 2 Delay

Effect Pedal for Electric Guitar Delay, The new TC MASH technology turns the foot switch into a pressure sensitive expression controller, New Ethereal Delay algorithm, With the Audio Tap function, you can adjust the delay tempo by striking your...

to the product
€186
Recommended
M-Audio BX8 D3

M-Audio BX8 D3, Active 2-way near-field reference studio monitor; Tweeter: 1.25 inch (32 mm) 80 W silk dome tweeter; Amplifier: 150 Watt RMS Bi-Amp Class A / B Power Amplifier; Sound pressure (max SPL): 114 dB; Crossover: 1.9 kHz; Other...

to the product
€144
(1)
Recommended
Chapman Guitars Ghost Fret Black Blood

Electric Guitar Body: Mahogany, Top: Flamed maple veneer, Neck: Maple, Fretboard: Ebony, Dot fretboard inlays, 22 Frets, Scale: 629 mm (24.75 inches), Pickup: 2 Chapman Primordial Zero humbuckers, Master volume and master tone controls with push/pull function, 3-Way pickup...

to the product
€499
Feedback Found an error or want to give us feedback about this page?

We're looking forward to hearing from you and aim to solve any problems as soon as we can.

Please leave a comment. Please enter your e-mail address.