As Jax2 said I had this amp for a while but did not have any hum at all. So I don't have much to add. I contacted Almarro directly when i was looking for tubes and received replies the next day. You might try sending them an email to get more ideas for a solution (sales@almarro dot com).
Tube Ampp Almarro low level hum
My Almarro 318B amp has recently developed a low level hum that comes and goes. I have swapped out all 4 tubes at one point or another and that does not change it. Once the hum stopped for a few days while I was breaking in a new paid (NOS) of 6C33C tubes. But it keeps coming and going. It gets a bit louder and then softer. If I tap the base of the amp, the hum stops. If I pick up the amp, it stops. If I knock the table where the amp sits, it stops.
I run the amp about 6-8 hours a day. Once a week I foget and leave it on all night.
Any ideas?
Thanks
Dan
I run the amp about 6-8 hours a day. Once a week I foget and leave it on all night.
Any ideas?
Thanks
Dan