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Old 16th June 2011, 04:30 PM   #31
UKPD is offline UKPD  United Kingdom
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Just got some alu leaf tape this morning. Wow, 25 cm length of 45mm wide tape measured 1.2R. I'll be replacing the ribbon over the weekend on my 1.3 m ribbons . Quick test of corrugating the ribbon bonded to 3um Mylar worked a treat, thanks ABJensen, great idea. Btw was your aluminium leaf tape made up of small sections or was it continuous length? That might be the reason for higher resistance (apart from thickness) since there will be contact resistance between the small pieces that make up the tape.

Peter

Last edited by UKPD; 16th June 2011 at 04:40 PM.
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Old 16th June 2011, 05:50 PM   #32
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What do you use to bond the ribbon to the mylar? jer
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Old 16th June 2011, 06:53 PM   #33
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Mine is made of 15cm leaf that overlap. Is yours continuous ? UKPD.Looking forward too your opinion of the sound.Well I am happy too bring some too diy comunity. Just call it the Jensen ribbon
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Old 16th June 2011, 07:44 PM   #34
a.wayne is offline a.wayne  United States
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Brunob :

To make sure i'm following you correctly . Are you saying it is better to have
a a 10mm (H) x30 mm ( d) magnet vs 10 mm x10 mm .?
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Old 16th June 2011, 07:48 PM   #35
a.wayne is offline a.wayne  United States
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Quote:
Originally Posted by UKPD View Post
Just got some alu leaf tape this morning. Wow, 25 cm length of 45mm wide tape measured 1.2R. I'll be replacing the ribbon over the weekend on my 1.3 m ribbons . Quick test of corrugating the ribbon bonded to 3um Mylar worked a treat, thanks ABJensen, great idea. Btw was your aluminium leaf tape made up of small sections or was it continuous length? That might be the reason for higher resistance (apart from thickness) since there will be contact resistance between the small pieces that make up the tape.

Peter
Now does the increased resistance comes at a cost in sonics ...?
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Old 16th June 2011, 08:17 PM   #36
tinitus is offline tinitus  Europe
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Quote:
Originally Posted by a.wayne View Post
Brunob :

To make sure i'm following you correctly . Are you saying it is better to have
a a 10mm (H) x30 mm ( d) magnet vs 10 mm x10 mm .?
wider magnets are much stronger
but only makes sense if you place them like this
ribbon is placed in level with front of magnet
felt between the magnets
very easy to build it like this
no need to use glue on magnets either
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Old 16th June 2011, 08:25 PM   #37
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I have measuret one leaf 15*1.7 cm 0.6 ohm
I have measuret one ribbon 160*1.7cm 5.4 ohm
This is not done 100% precise with presicion instrument. But it indicate contact resistens is not high.
And the high resistens comes from the thin aluminium.

Last edited by ABJensen; 16th June 2011 at 08:29 PM.
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Old 16th June 2011, 08:33 PM   #38
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Quote:
Originally Posted by tinitus View Post
wider magnets are much stronger
but only makes sense if you place them like this
ribbon is placed in level with front of magnet
felt between the magnets
very easy to build it like this
no need to use glue on magnets either
I have made a short ribbon 60cm*2.2cm like that with doppel layer of magnets.
It works quite well.
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Old 16th June 2011, 09:13 PM   #39
UKPD is offline UKPD  United Kingdom
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Quote:
Originally Posted by geraldfryjr View Post
What do you use to bond the ribbon to the mylar? jer
Hi Jer,

Used spray adhesive but it's way to thick, I'll have to get some 3M stuff.

Peter
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Old 16th June 2011, 09:22 PM   #40
UKPD is offline UKPD  United Kingdom
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Quote:
Originally Posted by ABJensen View Post
Mine is made of 15cm leaf that overlap. Is yours continuous ? UKPD.Looking forward too your opinion of the sound.Well I am happy too bring some too diy comunity. Just call it the Jensen ribbon
Mine are with 10 cm leaf which is very loose on joints, when rechecked previous measurement pressing at the joint lines the resistance was dropping.
I will try to press the ribbon while gluing & see if that helps. Maybe put some thinned down silver conducting adhesive on the joint.
Jensen ribbon... like it

Cheers

Peter

Last edited by UKPD; 16th June 2011 at 09:29 PM.
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