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Old 13th February 2009, 11:50 AM   #1
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Default Wanted: Crimson Elektrik CE1008

Hello.

Does anyone know where I can find a Crimson Elektrik CE1008 power amplifier module from the early 1980s? I am putting together a pair of active speakers and I have 2 CE608s for the mids but only 1 CE1008 for the bass (I used to run mono bass). If anyone has one of these that they are willing to part with please let me know.

Cheers
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Old 13th February 2009, 12:00 PM   #2
AndrewT is offline AndrewT  Scotland
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The CE1704 gives the same power as the CE1008 but has ~ double the output current capability before the protection triggers.
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Old 18th February 2009, 06:30 PM   #3
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Thanks AndrewT. I guess a CE1704 would pair up with my existing CE1008 then... Does anyone have one of these?
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Old 18th February 2009, 06:42 PM   #4
AndrewT is offline AndrewT  Scotland
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I have a pair of old 1704 series VII that have been slightly modified over the years. The 4 extra caps are easy to remove.
How much do you need them?

I also have a pair 1704 imp series VII that are slightly more modified and a little newer.

I also have a pair of 1704 series viii, but they are kidding calling up 170W into 4r0. Only one pair of 1386/3519 in the output stage.
Look at the SOA @ 100Vce. 1.5A vs 0.9A, no contest and a lower temp due to the plastic package.
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Old 18th February 2009, 07:43 PM   #5
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Hey, that's great. How much would you want for one or for a pair?

I do need at least one as I am currently running the left speaker with a pair of voltage regs to drop the volts from the PS for a 100W amp to suit a third CE608; not an ideal situation, but works enough to prove the speakers.

Cheers
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Old 18th February 2009, 08:51 PM   #6
AndrewT is offline AndrewT  Scotland
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It's worse than that.
Crimson gave a very strong warning against using any regulated voltage to supply their amps.
It went on to say they would not answer any questions or give support to a user attempting to use a regulated supply.
It has in part to do with optimising the PCB and amp to suit a conventional PSU, that in turn includes a tiny bit of positive feedback to compensate for supply rail ripple.

Your Email is switched off.
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Old 18th February 2009, 10:09 PM   #7
burbeck is offline burbeck  United Kingdom
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hi Andrew.
or the guys at crimson saw lots of very poor atempts at constucting a stable regulated supply more like.

'positive feedback to compensate for rail ripple' where does that gem come from?
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Old 18th February 2009, 10:16 PM   #8
AndrewT is offline AndrewT  Scotland
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From Brian, the long time designer at Crimson.
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Old 18th February 2009, 10:29 PM   #9
burbeck is offline burbeck  United Kingdom
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mr Powel must be a real clever guy. i would like to read his description of how that works
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Old 19th February 2009, 05:14 PM   #10
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Oops, sorry; email should now be on...
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