Hi everyone.
I hope you having a great weekend.
At the beginning I would like to point the fact that I am completely amateur in electronics or audio.
In my 5.0 set I have a two great tannoy speakers the only problem with them are non working tweeters. So I’ve opened the speakers to see if the tweeters are blown. The first thing which I’ve notice is the hair wires disconnected/cut. So I’ve checked the ohms with multimeter but due to a really thin wires is really hard to measure it, but when I did it, I’ve hears the noise coming from speaker so I believe they are not blow? Is it possible to solder those thin wires with connectors?
Another problem which I’ve notice is blow lamp fuse sk-3. I wonder with what currently available lamp fuse I can replace it? And will replacing this fuse fix the problem or it might be an another issue which caused fuses to blow?
Please see the attached photos.
I hope you having a great weekend.
At the beginning I would like to point the fact that I am completely amateur in electronics or audio.
In my 5.0 set I have a two great tannoy speakers the only problem with them are non working tweeters. So I’ve opened the speakers to see if the tweeters are blown. The first thing which I’ve notice is the hair wires disconnected/cut. So I’ve checked the ohms with multimeter but due to a really thin wires is really hard to measure it, but when I did it, I’ve hears the noise coming from speaker so I believe they are not blow? Is it possible to solder those thin wires with connectors?
Another problem which I’ve notice is blow lamp fuse sk-3. I wonder with what currently available lamp fuse I can replace it? And will replacing this fuse fix the problem or it might be an another issue which caused fuses to blow?
Please see the attached photos.
Attachments
It's not clear to me from your image where the thin tweeter wires are broken.
The fact that the crossover fuse bulbs in both speakers have blown smacks of severe overload
If one had remained intact, then measuring its resistance would have helped source a suitable replacment.
The fact that the crossover fuse bulbs in both speakers have blown smacks of severe overload
If one had remained intact, then measuring its resistance would have helped source a suitable replacment.
You can try soldering wires with lots of patience, adding a short piece of wire ( like 1 strand or filament from any common power cord) and solder to the spk wire using a small iron, say, 20W.
Respect to lamp fuse may be blown by a short overload of large magnitude, as when powering on/off the amp. Sincerely I don't know a good recomendation for substitute it, because it depends on availability and power and impedance of the spks on question.
Respect to lamp fuse may be blown by a short overload of large magnitude, as when powering on/off the amp. Sincerely I don't know a good recomendation for substitute it, because it depends on availability and power and impedance of the spks on question.
You can temporarily bypass the fuse bulb by soldering a short length of copper wire across it.
If your tweeters are OK, this should restore them to operation.
If your tweeters are OK, this should restore them to operation.
Ah! SK-3! 😎
As from this UK supplier: Convair Safety Relay Crossover Fuse Bulb SK3 from Convair Electronics PS2.05 IN STOCK (31 Oct 2021)
As from this UK supplier: Convair Safety Relay Crossover Fuse Bulb SK3 from Convair Electronics PS2.05 IN STOCK (31 Oct 2021)
Basically they are disconnected on solder point where you plug the normal connectors. It’s really small elementary so sorry if the photos not so clear
That should be correctable by soldering in the way Osvaldo described earlier.
Do let us know how you get on.
But these speaker wires are hair thin. Should I use any specific solder wire? Also, I dont have solder iron and no experience. Do you recommend any irons for amateurs which will be suitable for this case?
Something basic like this will do the job: Duratool SD01672 40 W Soldering Iron Kit - Black : Amazon.co.uk: DIY & Tools
Make sure you apply heat to the tweeter wire for the minimum time possible.
Make sure you apply heat to the tweeter wire for the minimum time possible.
Hi people, I have just pulled out a very old pair fo Tannoy Mercury m2.5 speakers.... both only have their tweeters working where i have pulled everything apart and the woofers are all connected fine... I assume this is a chip issue.... can you suggest how this can be fixed?
The first thing to do is to disconnect the woofers and measure their resistance using an ohmmeter. A reading of a few ohms would indicate that the woofers are probably undamaged.
If you don't have an ohmmeter, connect a 1.5V or 9V battery momentarily across the woofer terminals. If you hear a crackle and see cone movement then the woofers are probably undamaged.
Report back your findings.
Next we may have to look at the crossover board. If you could supply a clear photo showing the components on the board, that would be most helpful.
If you don't have an ohmmeter, connect a 1.5V or 9V battery momentarily across the woofer terminals. If you hear a crackle and see cone movement then the woofers are probably undamaged.
Report back your findings.
Next we may have to look at the crossover board. If you could supply a clear photo showing the components on the board, that would be most helpful.
dmens has opened a new thread on the M2.5 speakers: https://www.diyaudio.com/community/...ut-the-tweeters-are-help.394697/#post-7240560