Hello Myles, Thanks in advance for the knowledge you share.
I have a Marshall combo: TSL601 JCM 2000 60w.
Basically, the HT fuse blows when it is powered up. I don't even know what HT stands for. The main fuse seems to be ok. Also, amp is making a hum that shouldn't be there. I know this amp should probably be sent in for repair... just hoping you might have an idea or two before spending $$$ on it.
Thanks
SEHpicker