Should a 6L6GC rattle?

LooseMoose

Just bought a new one, JJ 6L6GC and it seems to rattle when moved - should it?  

I've plugged in and installed it - all seems well but should I be concerned?  The Groove Tubes 6L6GC it replaces doesn't seem to.

ecc83

Ha! I never had a MICROPHONIC EL34 in 50 years. Got them in the last ten!

Much of modern valves are ***T!

Dave.

ICBM

LooseMoose said:

Just bought a new one, JJ 6L6GC and it seems to rattle when moved - should it?  

I've plugged in and installed it - all seems well but should I be concerned?  The Groove Tubes 6L6GC it replaces doesn't seem to.

They often do. If it doesn't come out through the speaker the only issue is whether it irritates you when playing at low volume.

ecc83 said:

Ha! I never had a MICROPHONIC EL34 in 50 years. Got them in the last ten!

Much of modern valves are ***T!

I first came across badly microphonic power valves with the early Chinese ones in the late 80s. I had a Marshall combo to repair which would set up a constant low rumble and then sound like a blown speaker when you actually played through it. 'PM Tubes' EL34s - they put me off modern-production valves even back then, and I still think the old ones are better.