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QUAD ESL 57 A little work on the loudspeaker
QUAD ESL 57 A little work on the loudspeaker
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Old 7th January 2017, 12:19 PM   #11
Nemeske is offline Nemeske  Hungary
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The white rings are for keeping the banana sockets in place, as the box once was drilled by the previous owner.

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Old 7th January 2017, 12:24 PM   #12
Nemeske is offline Nemeske  Hungary
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The 'transformation' of the box:
First, redo the factory sized holes with some epoxy:

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Old 7th January 2017, 12:29 PM   #13
Nemeske is offline Nemeske  Hungary
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After sanding:




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Old 7th January 2017, 12:31 PM   #14
Nemeske is offline Nemeske  Hungary
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Drilling a factory-8mm diameter hole

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Old 7th January 2017, 12:35 PM   #15
Nemeske is offline Nemeske  Hungary
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After more sanding:



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Old 7th January 2017, 12:38 PM   #16
Nemeske is offline Nemeske  Hungary
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And the finished new black coating on the transformer box:

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Old 7th January 2017, 07:28 PM   #17
stokessd is offline stokessd  United States
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I've seen those resistors all over the map in terms of values, and they are also temperature sensitive. Did you re-measure them when they were cool?

You probably didn't hurt them, time and poor design hurt those resistors. Vishay makes a VR68 that is rated for the voltages used in that speaker.

http://www.vishay.com/docs/28907/vr25vr37vr68.pdf

VR68000001803JAC00 Vishay BC Components | Resistors | DigiKey


Hope that helps,
Sheldon
quadesl.com
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Old 7th January 2017, 11:29 PM   #18
Nemeske is offline Nemeske  Hungary
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The specs were much lower than the factory specs that is unlikely as these are rather become higher in value than this... I measured the resistors days after the mealtdown. Thank you for the link!
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Old 18th January 2017, 12:03 PM   #19
Nemeske is offline Nemeske  Hungary
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The bent brackets:

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Old 30th January 2017, 05:45 PM   #20
Nemeske is offline Nemeske  Hungary
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I had these bracket painted with PTFE teflon paint to ease slidding the panel in place later.
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