[hcraig244]

Glitch…

Yes the saucepan is simply a convenient diameter to rest the speaker on during removal of the dust cap and drying time of the epoxy, keeps any pressure off the cone and coil. The process of softening the dust cap comprises the use of my partners hair dryer providing hot air, this quickly softens the old adhesive which can then be very carefully lifted with a jewellers screwdriver….and in my case the use of a magnifying glass ;¬) takes a bit of patience but is quite straight forward.

[hcraig244]

These don’t need to be dead centre but just thereabouts, the accurate alignment will follow when the backplate and core are offered up to the magnet once everything has hardened off…….and in case anyone was wondering about the last pic it was taken through this magnifying glass, my eyes are not what they once where ;¬)

 

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[hcraig244]

Remove the old adhesive from magnet and backplate, not a lot there so easy task, and having applied some epoxy join them together….

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[hcraig244]

Next task is to soften the glue holding the dust cap in place, this needs to come off so I can see what im doing when putting everything back in place and to give me a clue when centering the core inside the coil.

 

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[hcraig244]

Michael….thank you for those kind words ;¬)

Cleaned up the core and backplate and applied apoxy last night….dried out nicely.

 

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[hcraig244]

All apart and ready for cleaning up prior to fresh epoxy, the coil still reading an encouraging 3.7 ohms….

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[hcraig244]

This is odd however……not seen this in the several I have taken apart, some sort of alluminium ring. Anyone got an explanation ? As can be seen the core has also dethatched itself from the backplate, the backplate and ferrite magnet will also need to be seperated.

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[hcraig244]

Came apart cleanly leaving the coil behind and, apart from a very slight inward burr, looking in good shape. The coil moves freely in the frame with no scratching on the sides and overall should be fine. You can see from the traces of adhesive on the frame that not a lot was applied during manufacturing

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[hcraig244]

Engineers vice once again, always a scary exercise as pulling things apart can cause more damage, firm upward pull keeping everything level..

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[hcraig244]

However I have to say I’ve not seen one looking quite so battered, everything looking askew….must have taken quite a knock.

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[hcraig244]

Well packaged up and looking like its survived the postal system…

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[hcraig244]

Ok

This arrived in the post today…….been expecting it.

 

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[hcraig244]

Hi

I have a couple of these wonderfully over engineered amplifiers…..just love them. I only have one commander however that was gifted to me by the good doctor, I’m taking the view you have neither commander or receiver board in you 6000?…..I could look inside mine and see if the microphone has any markings if you wish….

Craig

[hcraig244]

As I recall the solenoid de-energises to lift the tone arm same as the BG4000, my guess would be the return spring is sticking due to old grease/lubricant……give it a clean and if nothing else it will remove the spring from the investigation, check the Beolovers you tube blog below for a detailed account.

Regards Craig

[hcraig244]

Hi

Can you check that the speaker coil still measures around 4ohms first, if the coil is broken its probably terminal…i will send you a pvt message with my details in the meantime. Check the post in here S45- Repair for pics of the procedure i carry out

Craig

[hcraig244]

I’m surprised the speaker gives any sound whatsoever….the magnet has clearly shifted, I can sort that out if you get it to me.

Craig

[hcraig244]

Have you connected anything to the inputs to determine if the problem is across everything or just the FM side?

[hcraig244]

The metal epoxy has turned out a little lumpy, which in other applications may be a problem….not with this one however. Dust cap back on with some Aleene’s tacky glue, useful if in the unlikely case it has to be removed again. Ready to be dispatched back home!

Craig

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[hcraig244]

I will leave this to set hard, checking that the cone continues to move freely all the time, then run a bead of the metal epoxy glue around the entire circumference of both magnet and rear plate to provide additional strength for future knocks. Following the above trauma the coil still gives a resistance reading just below 4 ohms…..

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[hcraig244]

moving swiftly on the custom made Jig can be mounted and the upper screws tightened on the ferrite magnet to hold it securely, centred roughly in the middle with the lower set of screws resting on the top of the magnet, then turning everything upside down and viewing the core position through the dust cap aperture the lower screws can be adjusted to centre the core within the coil, this can take 10mins or so as it involves adjusting a screw and its opposite screw to effect the balance.

I have tried the other method using thin strips of card inserted into the coil to centre the core without much, if any, success….my thinking was that speaker manufacturers wouldn’t use bits of card to do this so there had to be a better way.

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