Quick background:
Installed a Weber copper cap (rectifier) and a VVR kit in my 18 watt derived head.
Turned all switches on and measured a B+ that went from 30-ish to 230-ish. Seems good.
Put everything back together, plugged the speaker cable in (key to my question right here) and this time when I turned it on I blew a fuse.
That's when it hit me. I had turned it on without any load.
But I only measured voltages real quick and turned it off. I did not plug in a guitar.
Now I need to know why the fuse blew and I need to know if I damaged the output tubes.
For the fuse - I'm thinking maybe it was simply a matter of bowing down to the extra load from two new devices. I had honestly never specced out the proper size in the first place. The fuse that blew is on the line side of the PT, rated 250v and 1 amp.
But what do I need to do about those tubes?
Installed a Weber copper cap (rectifier) and a VVR kit in my 18 watt derived head.
Turned all switches on and measured a B+ that went from 30-ish to 230-ish. Seems good.
Put everything back together, plugged the speaker cable in (key to my question right here) and this time when I turned it on I blew a fuse.
That's when it hit me. I had turned it on without any load.
But I only measured voltages real quick and turned it off. I did not plug in a guitar.
Now I need to know why the fuse blew and I need to know if I damaged the output tubes.
For the fuse - I'm thinking maybe it was simply a matter of bowing down to the extra load from two new devices. I had honestly never specced out the proper size in the first place. The fuse that blew is on the line side of the PT, rated 250v and 1 amp.
But what do I need to do about those tubes?
6V6 valves are fairly rugged and unless a high signal is passed through them with no load, they will be fine. Is your mains input fuse anti surge? It needs to be and probably 1.5A Time delay type.
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