Wanted: Crimson Elektrik CE1008

ivorcally · 13th February 2009, 11:50 AM

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

AndrewT · 13th February 2009, 12:00 PM

The CE1704 gives the same power as the CE1008 but has ~ double the output current capability before the protection triggers.

ivorcally · 18th February 2009, 06:30 PM

Thanks AndrewT. I guess a CE1704 would pair up with my existing CE1008 then... Does anyone have one of these?

AndrewT · 18th February 2009, 06:42 PM

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.

ivorcally · 18th February 2009, 07:43 PM

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

AndrewT · 18th February 2009, 08:51 PM

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.

burbeck · 18th February 2009, 10:09 PM

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?

AndrewT · 18th February 2009, 10:16 PM

From Brian, the long time designer at Crimson.

burbeck · 18th February 2009, 10:29 PM

mr Powel must be a real clever guy. i would like to read his description of how that works

ivorcally · 19th February 2009, 05:14 PM

Oops, sorry; email should now be on...

13th February 2009, 11:50 AM	#1
ivorcally diyAudio Member Join Date: Sep 2005	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

13th February 2009, 12:00 PM	#2
AndrewT diyAudio Member Join Date: Jul 2004 Location: Scottish Borders	The CE1704 gives the same power as the CE1008 but has ~ double the output current capability before the protection triggers. __________________ regards Andrew T.

18th February 2009, 06:42 PM	#4
AndrewT diyAudio Member Join Date: Jul 2004 Location: Scottish Borders	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. __________________ regards Andrew T.

18th February 2009, 08:51 PM	#6
AndrewT diyAudio Member Join Date: Jul 2004 Location: Scottish Borders	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. __________________ regards Andrew T.

18th February 2009, 10:09 PM	#7
burbeck diyAudio Member Join Date: Aug 2004 Location: Ratae Coritanorum	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? __________________ regards bob


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18th February 2009, 06:30 PM	#3
ivorcally diyAudio Member Join Date: Sep 2005	Thanks AndrewT. I guess a CE1704 would pair up with my existing CE1008 then... Does anyone have one of these?

18th February 2009, 07:43 PM	#5
ivorcally diyAudio Member Join Date: Sep 2005	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

18th February 2009, 10:16 PM	#8
AndrewT diyAudio Member Join Date: Jul 2004 Location: Scottish Borders	From Brian, the long time designer at Crimson. __________________ regards Andrew T.

18th February 2009, 10:29 PM	#9
burbeck diyAudio Member Join Date: Aug 2004 Location: Ratae Coritanorum	mr Powel must be a real clever guy. i would like to read his description of how that works __________________ regards bob

19th February 2009, 05:14 PM	#10
ivorcally diyAudio Member Join Date: Sep 2005	Oops, sorry; email should now be on...

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