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Questions & Answers
My B&K AVR 202 will
Check the speakers first. Remove all the speakers from the amplifier and switch ON the amplifier. If the amplifier switch ON from standby without any trouble then any one of the speaker is damged or the wiring to the speaker have some problem. . if it doesn't switch ON from standby there is internal hardware faulty.
IF so Please take it any good electronic reparing shope near you. Becuase you hve to check the voltages at all the outputs of the amplifiers. In this amplifier user can't do any thing. To work wit this amplifer need a throuh knowledge in electronics. If you do someting wrong the amp will became irreparable, because its amplifier stage work in high ampere power supply.
on Sep 20, 2011
My Fender Bassman 100 amp keeps buzzing.
Part of the power supply is a filtering stage that completes the conversion from AC current to DC. The "cap" is a capacitor that furnishes voltage to help smooth the alternating current that is left from the rectifier stage. These will start to fail over time. While it is a relatively simple repair for anyone that does this for a living, I would not suggest this as your first repair. Expect a parts cost inthe $20 range plus the local labor rate for the entire repair.
on May 20, 2009
MY BASSMAN 100 MASTER VOL MODEL FROM 1972 HAS A HUM IN IT...? WHA
Well where do I begin. First, the polarity switch on the back might eliminate or reduce the hum, but by todays standards the way it functions is a deadly safety hazard (remember all the musicians that got fried in the '60's and early '70's?). That circuitry should be disabled and the unit retrofitted with a 3 prong power cord.
Next, the tube filiments are powered by AC voltage, and there is a control on the chassis for balancing it in order to reduce the hum. It could be toast or mis-adjusted. There could be a tube or other component problem causing your hum. The DC power supply could have faulty filter capacitors.
Another source of problems in these amps are the carbon resistors that introduce static noise in the audio. These should be changed to much better carbon film resistors.
If you are not comfortable working on electronic equipment with voltages in excess of 300VDC you should bring it to a pro audio repair shop.
on Apr 28, 2009
I need a volume control for a b&k avr305 can
Well you can load BFD filters. But before you inserted a BFD between your AVR and sub you simply set up the balance between all your speakers and sub with the AVR trim controls and AVR test tones. Then your master volume of the AVR was your main volume control.
The situation hasn't changed much after inserting a BFD, other than you should not disturb the setting you set on the AVR sub trim because you may cause clipping or low level inputs into the BFD. So, use the subwoofers own amplifier volume to balance levels rather than the AVR sub trim.
on Sep 05, 2009
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