We are working to improve the UX to make it more obvious for BIAS FX users. Note: if you are JamUp user, by default it will show JamUp icon on BIAS AMP upper bar, tap and hold JamUp icon to show BIAS FX option, then you can select BIAS FX as your default multi-effects app. Note: You are not allowed to delete default amps.
Das GUI wurde etwas glatt gezogen, sieht aber grundlegend vertraut aus. You can also delete your custom amp in BIAS FX by tapping on the garbage icon under the small tube icon. Wie üblich kann man in dem Virtual Amp Designer die verschiedenen Stufen eines Verstärkers einzeln einstellen: Preamp, EQ, Tonestack, Poweramp und die Box. After adjustment, you can click on BIAS FX icon on top bar in BIAS Amp, it'll send this adjusted amp back to BIAS FX. (Photo 3).Tap on the small tube icon and you can send current amp into BIAS amp to do more detail tuning like changing preamp tube or adjust compression in transformer and so on (Photo 2).When in amp's control panel, you'll see a BIAS Amp icon roll in from the right side of the screen (Photo 1).This guide is reserved only for those who still have the apps installed on their device.īIAS FX is fully integrated with BIAS AMP (sold separately), all 12 included amp models can be opened into BIAS AMP, tweaked and imported back to BIAS FX. If you have previously deleted these apps from your device, you might not be able to download them from the Apple App store again. BIAS AMP 2 organizes its global amp presets into several categories. I might just install exactly 68-Ohm resistors to start instead of 74 and 75 ones that drifted over the years.Both Bias FX and Bias AMP are discontinued products. Still waiting for resistors from digikey - hopefully tomorrow. The ground scheme on this amp chassis is crazy - every stacked cap connection was used as a ground point, plus they were interconnected between them. I installed all new electrolytic capacitors in power supply, in amp and preamp when I started. The Professional version also gives you access to all presets found on the ToneCloud. It gives you access to more preamp and poweramp options, cabinet models, IR loader (Impulse Response), as well as the Amp Match feature. It is a full blown restoration, literally nothing has worked when I initially got this jukebox, power supply, amplifier, record changer, coin mechanism - you name it - it didn't work. A: In short, BIAS Amp (Professional) offers more options to choose from. Regarding if I had this hum before or not - I do not know. I have access to one side of the emitter resistors, since they are connected to the flat connector, but it is quite difficult to access the side of resistor where it is connected directly to the back of TO-3 transistor socket. So it is stupid difficult to do any measurements - all I see is a foil side of the boards. Then amplifier boards (one for each channel) are inserted into long flat connectors, and cover that are almost entirely. Output transistors along with emitter resistors and several other parts sit on or under heatsink. It's a complicated amp in terms of construction. Would this be a good idea, or should I leave the amp alone? I was thinking about installing 60 or 62 Ohm resistors (exact value) instead to check if I can kill these oscillations.
Right now, if measured in-circuit, the resistors are 74 and 75 Ohms, so they're quite a bit off, given the application. What do experts think about adjust bias current trying to get rid of this initial oscillation? Resistor R66 (68 Ohms) after triple diode in each channel (attached schematic) is pretty much the one that determines the current value. The resistors used in this amp are crap, so I replaced quite a few already. When I just turn it on, I hear oscillation for about half a second. I pushed them further up to 30V output (didn't touch the preamp, as volume control is between amp and preamp), and no distortion at 1KHz signal. I am almost done restoring a stereo amplifier from Rowe AMI jukebox, but would like to inquire about one remaining thing.įirst, I pushed the amp boards at rated 0.9V input with 14V output with no distortion.