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August 17, 2019, 03:11:31 AM

Recent Posts

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General Discussion / Re: Copper Ribbon Speaker Cables
« Last post by 2wo on Yesterday at 04:07:37 PM »
I tryed them once, they turned out to be an  irresistible cat toy...John
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Mainline / Re: Transformer screw hole blocked?
« Last post by geniekid on Yesterday at 02:06:34 PM »
Drill bit with the hand worked well.  Thank you.
3
Bottlehead Special Deals / Re: Crack in the World sale
« Last post by Doc B. on Yesterday at 11:10:32 AM »
Bump to remind everyone that this is the last day of this sale.
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General Discussion / Re: Copper Ribbon Speaker Cables
« Last post by Jamier on Yesterday at 10:42:30 AM »
Doc,

     I think you are right, they are fragile and should not be over manipulated. Another issue that some speak of is the issue of insulation. There are those that believe insulating with plastic degrades the performance. I don’t know where I am on that one but, I did insulate these with a kraft paper tape, 2 layers. I also soldered on copper washers to terminate the foil which I slip over the binding posts, screwing down the binding post nut over those, to avoid marring the foil ( that way the foil is in direct contact with the post). I can say that,right out of the box, these things increase the transparency of the image, the complete opposite of muddy. If and when they wear out and work harden, they are so quick and easy to remake that they are well worth the effort. If anyone makes these don’t stack the foil on the run to the speaker. Keep the 2 conductors seperate to the extent that you can.

Jamie
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Jäger Speaker / Re: new Jagers
« Last post by Doc B. on Yesterday at 09:23:13 AM »
Yay! Well done Joe!
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General Discussion / Re: Copper Ribbon Speaker Cables
« Last post by Doc B. on Yesterday at 09:21:06 AM »
My experience with that kind of foil cable is that it gets progressively muddy sounding as the copper gets flexed and work hardened. Regarding the oscillation the only way to know for sure if it is a problem is to look at the cables in operation on a scope, with the amp you want to use.
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Crack / Re: LED out troubleshooting help
« Last post by aphays on Yesterday at 08:03:34 AM »
Just wanted to follow up, as I finally got this sorted. Traveled and was working much of the summer, so I had to put this down for a while. I must have gone over every soldered connection in the amp 3 or 4 times to no avail. Replaced the LED's, no change. Over time I became suspicious that the issue was in the area of A8. Finally decided it had to be a bad 12au7 tube or a bad socket connection. Ordered both. Tube arrived first. Replaced it. Amp is working great. Both LED's come on together now instead of in a staggered delay. And they stay on. So glad to finally get this sorted out! Can't believe it took me that long to figure out it was an issue with the tube itself. Now finally looking forward to just listening.
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General Discussion / Re: Burning Amp Event Nov 9-10 San Francisco
« Last post by Cary on Yesterday at 07:24:24 AM »
If you did not build anything this year please bring your past projects. There will always be people who will love to hear what you have. Burning Amp is not a competition it is to show your DIY projects or rebuilds.

A couple of years ago we had a gentleman who demonstrated his rebuilt Sansui amps and some Allison speakers which I thought were really cool and great sounding.
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General Discussion / Copper Ribbon Speaker Cables
« Last post by Jamier on Yesterday at 06:40:32 AM »
PB, PJ, or Doc,

      I am experimenting with 14 AWG Copper Ribbon cables made from an unwound Goertz inductor. Goertz makes ribbon cables and advises the use of a Zobel network across the speaker binding posts to reduce the risk of oscillation due to the high capacitance of the ribbon. I did not measure the capacitance of these, but I’m thinking that the use of a Zobel is probably not necessary when using an output transformer coupled amp. I have used these for a few hours now with no signs of a problem, but I was wondering whether I was just having good luck with this amp and might have a problem when used with another. By the way, they do offer an improvement over my conventional cables.

Jamie
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Seduction / Re: Seduction problem
« Last post by Paul Birkeland on Yesterday at 04:42:46 AM »
It sounds like it's time for a switch with no center position!
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