Avid 103 repair
Posted 28 June 2012 - 12:21 PM
I'm a new member who joined because of the great information I found on Avid 103 speakers in the thread "Avid 103 fuse size". I've had a pair on Avid 103 speakers since the early '80s and loved them, but one is no longer working. The sound coming out is muffled and muddy and it seems neither the tweeter nor mid-range is working. I was about to replace them, but decided to look up repair info first. The fuse holder on this speaker broke years ago and a friend used tin foil to jam the fuse back in. It worked that way for decades. I seem to remember that the speaker behaved exactly the same way --no tweeter, no mid-range, when the fuse was removed. I'm going to try replacing the fuse first --now that I know I need an ACG-2. (Thank you!) But I'd like to ask a couple of questions...
Do you think this is a fuse problem? Would the tweeter and mid-range stop working if the fuse was blown or not making contact?
Does anyone know where I might find a replacement fuse holder? I've looked around the Web, but found nothing. Any good vintage speaker parts sites?
I happen to live in Rhode Island (where my Avids were born). Does anyone know of reputable speaker repair shops in the area that you trust with old stereo equipment?
Posted 28 June 2012 - 03:37 PM
Could very well be the fuse--that's what it is for, to protect the mid & tweet. OTOH, the tin foil "fix" is a bit like replacing the fuse in your house with a penny. Sure, the lights will work but whatever caused the fuse to blow will burn your house down. So yes, your drivers "may" be fried.
You can test the drivers by connecting speaker wire from your amp directly to the terminals on the back of each driver and playing some music at low levels. Mid should sound fine and tweeter should sound a bit thin.
CSP Member Carl is in Connecticut and has a reputation for good work but this may be a DIY project.
I'm sure I bought some fuses and holders online. Try googling "AGC-2 fuse holder" or maybe Vern, our speaker fuse expert, has some advice.
Does this look like what you need?
Posted 29 June 2012 - 12:56 PM
I'm going to replace the fuse first to see if that fixes the problem. If not, I've decided to have the speaker repaired. I really don't want to give these 103s up. And, I will try to find the correct fuse holder. I didn't even understand that jamming the fuse in with tin foil bypassed the protection until I started reading everyone's comments on this site. (--If the problem is just the fuse, it will be a DIY project, but if it's anything more complicated I should probably entrust it to someone who knows what he's doing.) I did go to the Littelfuse site after reading the previous posting, but there were so many fuse holders! My speakers are high up on a shelf and I'll have to climb up on a ladder to get a look at the intact fuse holder to see what I need. It may well be the one you provided the link to. Thank you very much! I'll let you know.
Also, I thought I read that the speakers would still work with the fuse removed, so I began to think my speaker had a much bigger problem. Thank you for giving me hope that is is just a minor fuse problem.
I'll be checking the fuse holder and ordering it (I hope) and some AGC-2 fuses this weekend. I will report back on how it goes. Thank you very, very much for your help. I really appreciate it.
Posted 29 June 2012 - 02:45 PM
PE also has "3AG/AGC" fuses in various values to fit that holder: http://www.parts-exp...FTOKEN=53600991
I don't know how many amps you need and whether fast blow or slow blow. Best to look at your remaining good fuse and see what it is.
Posted 29 June 2012 - 04:50 PM
I'm at work now and can't wait to get home and up that ladder to see what fuse holder I need! I'm very hopeful now.
One more, possibly stupid, question... The 103 speakers are up on a shelf near the ceiling and they're both lying on their sides. Is that okay or should they be upright? Thanks again.
Posted 29 June 2012 - 05:30 PM
A "quick acting" fuse would be a fast-blo.
Keep us posted.
Posted 30 June 2012 - 04:13 AM
Posted 30 June 2012 - 08:23 PM
Attached is a picture of my fuse holder (black).It's really no more than a cap that snaps in.
Also attached is a picture of a cap I just bought. What do you think? Do you think the red one will work? (I hope you can see the attached pictures. I wasn't sure how small I should make them.)
My tuner arrived today too. Earlier than expected. It's been a very good day for audio.
Thanks very much for your interest and patience.
Posted 30 June 2012 - 10:21 PM
When the original 5/8" Littlefuse square chassic style chassis fuseholders were made, they came with the ordered body colour and cap colour.
The fuse was always included and a warning that if the cap was installed in the body, without a fuse, it was basicly a writeoff, as it wil not come apart, without breaking them.
The caps were made in 4 or 5 or more different colours, I have an old catalogue.
If the cap is an OEM original then you only have the different colour cap, bezel contrast to look at.
Some tv repair shops, electrronic surplus sources or hobby shops may still have black units or just caps onhand.
You may see Dynaco 400 amps on ebuy with their black bezels and red caps.
Posted 03 July 2012 - 02:24 PM
Thanks very much for answering. I'm still not exactly sure what I'm looking for. (--Until today, if someone said "bezel" I thought of jewelry, not fuses.) I'll keep looking on eBuy and eBay and if a seller describes a 5/8" Littelfuse square fuseholder I'll know enough now to pay attention. I ordered the correct fuses as soon as I read about them and they should be here any day now. I guess I'll resort to the old tin foil trick. One of my speakers played that way for 20 years without any damage. Eventually I may find that elusive fuse holder...
Thank you for helping.
Posted 03 July 2012 - 05:38 PM
Be cautious when shopping on the net.
Littlefuse like or similar to Littlefuse fuseholder is in all likelyhood not made by Littlefuse.
There is at least one clone fuseholder being sold on ebuy, likely offshore production.
When you remove the cap you can only see the bezel, or picture frame.
If you are lucky enough to live in an older, larger, US city, you should be able to find electronic surplus stores with these on-hand, New York especially.
Posted 10 July 2012 - 11:32 AM
I'm still confused.
I received the little red fuse caps and the AGC-2 fuses and popped a cap and a fuse into the broken speaker --and it's working wonderfully now. The fuse cap clicked in and fit perfectly. No more tin foil! And I don't really care that the cap is red since I keep the grills on the speakers so the cap isn't visible.
But the part that is confusing me is... The seller did say that he was selling just the caps. So am I still missing the body of the fuse holder? (My other speaker only had a cap and a fuse --no "body" either.) And if I am still missing the body of the fuse holder, does it mean that by just using the cap and fuse I'm still bypassing the fuse protection? --Is using just cap and fuse the equivalent of tin foil?
In the end, the speaker is working and sounds great so I'm happy. I'm just curious about the fuse holder. It doesn't seem that the slot that the fuse fits in is big enough for another piece (the body).
I posted the picture in case anyone is tired of dealing with tin foil and would like a fuse cap. But maybe in the long run it's the same as using tin foil. I don't really know...
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