dollar99
New Head-Fier
- Joined
- May 22, 2007
- Posts
- 16
- Likes
- 0
Whatever I do, I cannot seem to get rid of the hum coming from the left channel. Here is what I've tried
-Ground loop isolator between the source
-2 prong adapter
-Unplugging the source still gives me the hum so its not source related.
-Lowering the volume to 0 has no effect
-Tried different power outlets around my house, tried plugging into a computer UPS, and home theater power conditioner. Nadda.
I've noticed that when I first turn on the amp, it starts to hum after 5-10 seconds. If I gently tap the power supply the hum goes away. The hum will come back anywhere between 10 seconds up to 2 hours. After the amp is nice and hot after listening for a while, the hum does not go away at all.
Oh, and sometimes if I unplug the phones(AKG 701) and plug them back in it stops the humming for a couple of seconds, then it returns.
Could it be that I have a faulty tube?
I am not happy with this amp.
-Ground loop isolator between the source
-2 prong adapter
-Unplugging the source still gives me the hum so its not source related.
-Lowering the volume to 0 has no effect
-Tried different power outlets around my house, tried plugging into a computer UPS, and home theater power conditioner. Nadda.
I've noticed that when I first turn on the amp, it starts to hum after 5-10 seconds. If I gently tap the power supply the hum goes away. The hum will come back anywhere between 10 seconds up to 2 hours. After the amp is nice and hot after listening for a while, the hum does not go away at all.
Oh, and sometimes if I unplug the phones(AKG 701) and plug them back in it stops the humming for a couple of seconds, then it returns.
Could it be that I have a faulty tube?
I am not happy with this amp.