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Old 22nd February 2008, 10:55 AM   #11
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Default Re: SP9 Line Circuit?

Quote:
Originally posted by calvert73
but my hand is itching!

RC

Don't tell me you're itching to clone ARC's worst ever preamp when curcuits for LS25 & LS25Mk2 are available.
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Old 1st March 2008, 03:35 PM   #12
Valde is offline Valde  Denmark
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Quote:
Originally posted by caliban
I have the schematic. if you don't get if from anyone else, let me know and I will photograph it and send it to you. Mine is dated 4-20-97, it's an original SP9.
caliban, I can't find the schematic anywhere. Do you still have the possibility to send me a copy? I would be very pleased then ;-)

Regards
Valde
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Old 1st March 2008, 05:39 PM   #13
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Default Re: Re: SP9 Line Circuit?

Quote:
Originally posted by analog_sa
Don't tell me you're itching to clone ARC's worst ever preamp when curcuits for LS25 & LS25Mk2 are available.
Why would you even bother with that?
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Old 1st March 2008, 06:55 PM   #14
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Default Re: Re: Re: SP9 Line Circuit?

Quote:
Originally posted by Brett
Why would you even bother with that?
I wouldn't
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Old 1st March 2008, 09:23 PM   #15
caliban is offline caliban  United States
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Valde, I sent the schematic on Feb 22. I can resend if if you did not receive it, please advise.
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Old 1st March 2008, 11:17 PM   #16
Luke is offline Luke  New Zealand
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Default which pre then

brett and analog_sa, if you were going to build a balanced valve pre, something with some gain and not rare silly price and availability tubes, which would you build?
My understanding is the arc ls25mkII is quite a good pre amp, but then that was reviews not listening.

cheers arthur
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Old 2nd March 2008, 01:12 AM   #17
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Default Re: which pre then

Quote:
Originally posted by Luke
brett and analog_sa, if you were going to build a balanced valve pre, something with some gain and not rare silly price and availability tubes, which would you build?
Assuming no phono pre reqd, a balanced version of my 12B4 with siutable OPT or
http://www.raleighaudio.com/Figure_18.jpg

...but with ECC99, 6H30 or 6H6N and OPT adjusted accordingly. EL84 in triode with a sufficient amount of current would also be nice.

It all depends upon how much gain you want.

Without the input trans, Allen Wright's RTP3C front end could be added with a little tweaking of RIAA components to give phono capability and would come close to the last full function pre I built, and is similar to the next one I have planned. All my vinyl is stored at the moment and will be for some time yet, so it's way down on the to-do list.
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Old 2nd March 2008, 06:36 AM   #18
Valde is offline Valde  Denmark
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Quote:
Originally posted by caliban
Valde, I sent the schematic on Feb 22. I can resend if if you did not receive it, please advise.
Caliban, hmm I have not received this long awaited email



Last week there was a ADSL break.out in my area for 36 hours. so maybe I has been harmed by that.

With Regards
Valde
flemming.skov@nypost.dk
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Old 2nd March 2008, 11:11 AM   #19
caliban is offline caliban  United States
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V,

I resent the schematics (6 pages) on March 2, 6:20 A.M. EST (USA). If you do not receive the email this time, let me know and we'll figure something out.

Make sure your spam filter does not bury it, sender is flatsixxx.
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Old 2nd March 2008, 02:36 PM   #20
Valde is offline Valde  Denmark
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Quote:
Originally posted by caliban
V,

I resent the schematics (6 pages) on March 2, 6:20 A.M. EST (USA). If you do not receive the email this time, let me know and we'll figure something out.

Make sure your spam filter does not bury it, sender is flatsixxx.

Caliban, this is very strange! I have not received your mail. Eventhough that I had received other emails this day ?!? I'm not aware that I have a spam filter, if so, it's administrated by the ADSL operator which is DK's biggest operator on this field and should manage this kind of files...

Do you send it direct to flemming.skov@nypost.dk ?
Thanks for your efford in advance...
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