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In Reply to: Re: SMGb problem posted by ADHuri on December 12, 2006 at 08:34:39:
do the caps have values printed on them?
Does MUG have a schematic?
I do not have first hand experience with your model, hopefully a more learned inmate will appear.
Follow Ups:
Berndt,I re-checked the continuity again and one stretch of it was open (However I could not make it stick together). The only way to overcome this is to buy a new set of tweeter ribbons and the work could be cumbersome. My choices qre:
1) Repair both speakers myself by changing the 2 capacitors and replacing both tweeter ribbons (place the order from Magnepan)
2) Purchase a new set of MMG
3) Send it to Magnepan for reapirWhat do you think?
Regards,
Daman
I've never worked on SMGs before, or even seen them other than in pictures, but I just finished redoing the tweeters on a pair of MG-IIa Maggies. I think they are similar. The first tweeter was difficult and the second was easy. I think it was just a matter of getting the technique down. Now I'm anxious to find some more to repair just for the fun of it!Whether you would enjoy this kind of project only you can say.
Personally, I'd most likely do #1 on your list, and least likely to do #3.
I doubt the capacitors are the problem, but replacing them with nice poly caps could improve the sound and wouldn't be expensive.
Rod
Rod,I was wondering if there is a way to join the broken ribbon like soldering it or using a conductive glue (if there is such a thing)? Secondly, I also noticed that the end of the ribbon seemed to be soldered at the terminal post? Did they use normal solder? I hope the repair kit comes with an instruction manual.
Just want to make sure that I've covered all the necessities if I decided to take the repair path.
I've heard conductive epoxy has been used successfully. I would give that a shot first.
Dear all,Thanks for the advice. I've ordered the repair kit from Magnepan and at the same time would like to try the conductive epoxy.
Will keep you posted of my progress.
I've read of people using a rear window defroster repair kit to repair the tweeters, but they say it's only a temporary fix.The tweeter repair kit from Magnepan should come with special solder for the aluminum wire, and instructions.
Rod,Thanks for the advice. I'll order the necessary from Magnepan. The tweeter ribbons definitely need to be changed for both. I am thinking of getting the MMG since this pair has beena around since 1992.
Will get back to you of my progress.
Regards,
Daman
Berndt,Thanks for the reply. Last question, there are 2 caps with the following inscription;
- the 1st one is blue in color and has "Richey, 25uF-100V, BBC-9311" and
- the 2nd is bigger and white in color and has "A2285-100V"I would assume that A2285 is capacitor value coding with the "A" indicating temperature or voltage range. How I wish the value of this capacitor is easily identifiable. Do you have any clue?
Thanks,
Daman
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