MoonBassAlpha

good job the song wasn't longer.... you'd catch your death of cold!

Have a great gig! I hope you're getting a fortune for it!

Both cabs will see 250W, as they're the same impedence. Each driver in the 210 will see 125W and each driver in the 410 will see 62.5W.
Both cabs will be well within their ratings, so I don't see a problem. The 210 should be less prone to farting out, as with more cone area in total you shouldn't need to push the whole rig as hard.

I'm sure the Ernie Ball forum would give you all the advice you need on upgrading their bridges

Firstly, have you checked that it isn't an output fuse at the amp that has blown, and checked the speaker with a different amp?
It would be a bit gutting to go to the expense of replacing/repairing the speaker if it is only a tiddly fuse at fault.

Analogy: my car wouldn't start, bought a lovely new battery. Turned out to be the starter motor after all, nothing wrong with the battery...

That's lovely. What is the little round thing by the upper horn though?

My postman kindly leaves spare rubber shockmount type elastic bands in my front garden, and I don't even remember telling him I needed some! Now THAT's service!

I like to think of this hat as something like John lennon would have worn, circa Help. Probably look like a paedo in reality.
And, yes, the guitarist is tall and I'm very short. Always have been. Even when I was little

[url="http://www.youtube.com/watch?v=67TORLNAjhw"]http://www.youtube.com/watch?v=67TORLNAjhw[/url]

I'll have the suede Strap please!
Details PM'd

I'd love a Falcon.
I think these are the best looking double-cut guitars out there. And I own a '74 SG! (also had a LP Special D/C)
That looks in wonderful condition too.
Good luck with the sale.

I've used Wembley Loudspeakers before, to re-centre the cone on an old Audax driver for my mum's Audiomaster speakers, and they did a fine job. I feel certain i SHOULD be able to make an adjustable jig to do this, I've just got little time at work to do it, though we do have the facilities. I will bolt the speaker to a plate, mount 3 sturdy pillars at 120degrees with tapped holes and long bolts to act on the magnet, or the plate holding the magnet. Ideally one of the bolts would be a spring-loaded plunger, but I don't think our scrap bin runs to anything suitably forceful.
If the mounting plate has a hole in it I should be able to check the movement of the cone as I adjust the magnet, or could apply a signal and tune for best sound.
I know it sounds like a lot of trouble, but it has become a challenge now, and I'm not quite ready to concede defeat yet. Also, Celestion don't seem to offer an equivalent in 4 ohm these days, probably a special made for Trace.
What can go wrong?...

Could be the power amp chip thermally shutting down. Most chips have some sort of thermal protection. Might be worth checking the chip is still in good thermal contact with the heatsink, or chassis, if thats what it uses as a heatsink (likely)

ok, plan A didn't quite work, nearly though. Even though I got as much shim in as I could, the voice coil was still not moving freely after the magnet was glued up.
Now to work out how to implement plan B

Ok, I've got a speaker that has had a bad jolt which has fractured the glue holding the magnet on. This has meant the magnet assembly has clamped itself off centre and trapped the voice coil.
Everything else is in working order, just doesn't work as a speaker, very quiet and no bass
I'm going to try to glue it back on-centre.
I think the received wisdom is to remove the cone entirely and centre the magnet "plug" in the assembly by shimming it symmetrically in the hole and glueing (presumably with a slow setting glue to allow movement while aligning)
I've a couple of ideas as to how to do it without removing the cone entirely, just the dust cover.
The speaker is a small Celestion (K5C-30, 4ohm) which isn't strictly a bass speaker, but I'm hoping anything I learn will be applicable to larger speakers that have suffered the same fate.

Plan 1: remove the dust cover, try to shim the Plug with the voice coil in situ while the glue sets.

Plan 2: make a centring tool out of sheet metal with 3 adjusting screws at 120 degrees. This would fit over the back of the magnet, locating over a convenient hole in the centre of the magnet. If I get the geometry right I should be able to centre it visually with the dust cover removed. Could also centre it with a signal to the speaker to check it isn't rubbing.

Sorry for the long post, feel free to chip in/shoot it down before I start! Hopefully this will be at least interesting to one or two folks!

If you only plug in to the send, won't it mute the signal to the power stage and tuner?
Tuner out might be a better option.

Hi All
Tried it again with amp and speaker. It's much mure noticable on headphones. I tried playing a lot harder, and the distortion got a bit worse, then suddenly.... it fixed itself and is now working correctly with no distortion.
I can only assume it was someting to do with the pot wiper, and a bit more voltage going through it cleared the path.
Anyway, result! (especially as the owner is collecting it this week!)
Thanks for the help though.
Jules

I was monitoring the levels into my Zoom HD recording thing and made sure it was well short of clipping, so "hotness" shouldnt be an issue.
Being a semi-acoustic, the tone control isn't the easiest to get to, but that is a top suggestion - any idea what the value it would have been originally?
I'm guessing 0.022 or 0.047uF ish.

Thanks chaps!

Hi knowledgable ones.
Has it ever been known for an old tone cap to cause distortion? As I wind the tone towards 10 (more bassy on Hofners!) a bit of distortion seems to be introduced. It only does it on the neck p\u and gets worse from about 6-10. The tone changes as it should. The pickups have been rewound this week.
I listened on headphones and monitor speakers-sounded the same on both, even at low volumes.
Bass is a '64 Verithin.
Cheers
Jules

I love the pickup routes too - what a nice touch. Who makes the bridge? It looks like a nice piece of engineerirng.
I think there's a touch of Alembic in there. It does look classy.
Good work!

Incorrect! It was a blatant excuse for me to show off my new old birdseye maple neck.

Carry on scratching, nothing for you to see here.

the double bass player at my local jazz jam uses one of these and it sounds really good! Certainly not flappy at "loud enough" volumes.

some pictures and dimensions and details about ports and tuning of your speakers would be very useful here....

[quote name='Hobbayne' timestamp='1321899748' post='1444243']
I cant listen to that Beatles version, the bass is so out of tune its embarrassing!
[/quote]
It's a bit sharp, but that's rock 'n' roll, innit!

...and no faux ostriches were harmed in the making of this thread.

Ok it's a fair cop - the birdseye maple matches my ostrich skin handbag!