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Hi, I have a RC 1550 pre amp and a RB 1552 amp. The amp has
Hi, I have a RC 1550 pre amp and a RB 1552 amp. The amp has a noticeable hum and it stops when I disconnect the 12 volt trigger and turn the trigger switch on. If I turn the trigger switch off the hum… read more
Rusty
Rusty
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For NEILONLY please. Note: Moderator, I will ONLY wait for
For NEILONLY please. Note: Moderator, I will ONLY wait for Neil. Do not release this question to a new technician. I have returned home. Here is the latest development. I used a lab power supply and s… read more
Neil
Neil
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Associate Degree
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This question is ONLY for a Technician that has worked on MANY
This question is ONLY for a Technician that has worked on MANY McIntosh C26 preamplifiers that will be VERY familiar with them in particular. I have been assisted by a most excellent technician earlie… read more
Neil
Neil
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Associate Degree
1,009 satisfied customers
Ampeg BA115HP - Has loud hum when switched on. Volumn and
Ampeg BA115HP - Has loud hum when switched on. Volumn and EQ controls have no effect on it. May be 60Hz hum. Do I have a bad capacitor?… read more
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My Panasonic AV Control Receiver has developed a loud hum.
My Panasonic AV Control Receiver has developed a loud hum. What causes this and how do I fix it?… read more
Aric
Aric
Owner/Operator of a custom AV company
Run A/V and repair business for over
36,735 satisfied customers
My disabled father has a mobility scooter. We werent able
My disabled father has a mobility scooter. We weren't able to obtain the same type of charger, but the replacement charger that I have obtained, can be used for all 24 volt lead batteries. But now tha… read more
Eng. Andres
Eng. Andres
Bachelor's Degree
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Hi, I own a NAD L73 Receiver and I am experiencing problems
Hi, I own a NAD L73 Receiver and I am experiencing problems with it. Lately all my speakers have begun "buzzing" preety badly when it is switched on, do you have any advice of what to do about that? R… read more
Aric
Aric
Owner/Operator of a custom AV company
Run A/V and repair business for over
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I have a G15 Gemini II. It has abad hum that is louder with
I have a G15 Gemini II. It has abad hum that is louder with increase of the vol. All Caps and rectifiers check good with meter. However there is 6 vac and a sawtooth wave on the scope at the B+ supply… read more
Aric
Aric
Owner/Operator of a custom AV company
Run A/V and repair business for over
36,735 satisfied customers
I have a situation with our church recording DVD audio to our
I have a situation with our church recording DVD audio to our DVD recorder. When played back, there is a loud continuous hum. We do not get this hum when recorded to the DVD camera when not connected … read more
Aric
Aric
Owner/Operator of a custom AV company
Run A/V and repair business for over
36,735 satisfied customers
I have a KEF Kube 2 powered subwoofer connected to a ONKYO
I have a KEF Kube 2 powered subwoofer connected to a ONKYO TX-SR 606 AV receiver via a single co-ax phono cable. The KEF mains supply is earthed but the ONKYO is not earthed I sometimes get a fairly l… read more
Aric
Aric
Owner/Operator of a custom AV company
Run A/V and repair business for over
36,735 satisfied customers
HK AVR500 receiver with 60 hz hum - no external ground loop
HK AVR500 receiver with 60 hz hum - no external ground loop issues, hums when only speakers are connected (no sources), volume/mute adjustment has no effect, plugging in to different AC power circuit … read more
electronicsguy
electronicsguy
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Bachelor's Degree
737 satisfied customers
I have a Kenwood amp, model KA7010. When it is turned on I
I have a Kenwood amp, model KA7010. When it is turned on I can hear it hum. Occasionally I will get a shock when touching the volume control. The amp sounds good with great highs and lows delivered to… read more
Aric
Aric
Owner/Operator of a custom AV company
Run A/V and repair business for over
36,735 satisfied customers
I have a Pioneer VSX-902s receiver that has developed a steady
I have a Pioneer VSX-902s receiver that has developed a steady hum thru the speakers. a friend suggested it may be a 60 hertz hum??? i have been using the receiver for the past 15 years. I have basic … read more
Aric
Aric
Owner/Operator of a custom AV company
Run A/V and repair business for over
36,735 satisfied customers
I own Marantz Receiver SR770 connected to surround sound system.
I own Marantz Receiver SR770 connected to surround sound system. I'm suddenly getting loud hum (feedback) from center and sub woofer and hiss from the others, even when TV is off. Checked connections … read more
Aric
Aric
Owner/Operator of a custom AV company
Run A/V and repair business for over
36,735 satisfied customers
Hello. I have a Samsung HDTV (LCD) and a Yamaha home theater
Hello. I have a Samsung HDTV (LCD) and a Yamaha home theater and have had each for a few months with no complaints. Just a couple weeks ago, I noticed a humming coming from my surround sound speakers … read more
Aric
Aric
Owner/Operator of a custom AV company
Run A/V and repair business for over
36,735 satisfied customers
I have a Harman Kardon AVR 310 and it has a constant buzz through
I have a Harman Kardon AVR 310 and it has a constant buzz through all speakers. I have tried replacing speakers and speaker wires, still get the buzz. I have been told the cause may be the ground, but… read more
Aric
Aric
Owner/Operator of a custom AV company
Run A/V and repair business for over
36,735 satisfied customers
I am attempting to read a 50 Amp to 50 Mv shunt (1 Mv 1 Amp).
I am attempting to read a 50 Amp to 50 Mv shunt (1 Mv = 1 Amp). This 50 Mv shunt output is easily read with a good meter (Fluke 87) and is very stable. The problem I'm having is that this shunt's outp… read more
Stereowiz
Stereowiz
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I own a vintage solid-state electronic organ that I have complete
I own a vintage solid-state electronic organ that I have completely restored over the last five years. The organ has 4 separate audio channels, and so is equipped with 4 audio power-amplifiers inside … read more
Rod
Rod
Graduate Certificate
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