Interested? |
No - no need for a FFB |
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7% |
[ 3 ] |
No - not without real inductors |
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5% |
[ 2 ] |
Yes - as long as you get "the sound" with your technology |
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86% |
[ 33 ] |
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Total Votes : 38 |
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intercorni
Joined: Jun 04, 2007 Posts: 69 Location: hamburg
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Posted: Fri Oct 01, 2010 2:01 am Post subject:
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Hello Jürgen,
I would like to include an input attenuator pot with a control LED.
How to do it best?
Regards,
Cornel |
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jhaible
Joined: May 25, 2007 Posts: 2014 Location: Germany
Audio files: 24
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Posted: Fri Feb 18, 2011 1:24 pm Post subject:
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Up for auction:
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=160547987865&ru=http%3A%2F%2Fshop.ebay.com%3A80%2F%3F_from%3DR40%26_trksid%3Dp5197.m570.l1313%26_nkw%3D160547987865%26_sacat%3DSee-All-Categories%26_fvi%3D1&_rdc=1
or search for item number 160547987865
(907 type, with frontpanel and heatsink; needs soldering some wires)
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=160547972547&ru=http%3A%2F%2Fshop.ebay.com%3A80%2F%3F_from%3DR40%26_trksid%3Dp5197.m570.l1313%26_nkw%3D160547972547%26_sacat%3DSee-All-Categories%26_fvi%3D1&_rdc=1
or search for item number 160547972547
(914 type, pcbs with potentiometers)
Happy bidding!
JH. _________________ "I tell you the truth, if anyone says to this mountain, 'Go, throw yourself into the sea,' and does not doubt in his heart but believes that what he says will happen, it will be done for him. Therefore I tell you, whatever you ask for in prayer, believe that you have received it, and it will be yours." (Mk 11,23f) |
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TekniK
Joined: Aug 10, 2008 Posts: 1059
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Posted: Fri Feb 18, 2011 3:03 pm Post subject:
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you wisely did put a reserve this time juergen.
i think you got trapped last time with your 40band filterbank.
you sold waay to low man.. for that price i would have buy it aswell. |
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jhaible
Joined: May 25, 2007 Posts: 2014 Location: Germany
Audio files: 24
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Posted: Fri Feb 18, 2011 5:37 pm Post subject:
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TekniK wrote: | you wisely did put a reserve this time juergen.
i think you got trapped last time with your 40band filterbank.
you sold waay to low man.. for that price i would have buy it aswell. |
I'm still learning. They only allow this in two categories - cars and antiques - in Germany. Took me a while to see that there is a musical instruments sub-category in antiques also ...
JH. _________________ "I tell you the truth, if anyone says to this mountain, 'Go, throw yourself into the sea,' and does not doubt in his heart but believes that what he says will happen, it will be done for him. Therefore I tell you, whatever you ask for in prayer, believe that you have received it, and it will be yours." (Mk 11,23f) |
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MR-808
Joined: Sep 30, 2010 Posts: 28 Location: Portland, OR
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Posted: Sat Apr 30, 2011 1:44 pm Post subject:
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Jürgen,
Do you have any suggestions as to how to provide "even" and "odd" band outputs for the 14-band design? Could another set of summing resistors be paralleled with the 33k ones, or would that affect the frequency of each bandpass filter?
Vielen Dank! |
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jhaible
Joined: May 25, 2007 Posts: 2014 Location: Germany
Audio files: 24
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Posted: Sun May 01, 2011 12:42 am Post subject:
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MR-808 wrote: | Jürgen,
Do you have any suggestions as to how to provide "even" and "odd" band outputs for the 14-band design? Could another set of summing resistors be paralleled with the 33k ones, or would that affect the frequency of each bandpass filter?
Vielen Dank! |
Because of teh passive nature of the design, every additional resistor will change something / cause interaction etc.
You could add a unity gain opamp buffer where you want to tap a signal, and then connect a resistor afterwards. But it will somehow go agains the overal design philosophy ... which doesn't mean you should not do it, of course.
JH. _________________ "I tell you the truth, if anyone says to this mountain, 'Go, throw yourself into the sea,' and does not doubt in his heart but believes that what he says will happen, it will be done for him. Therefore I tell you, whatever you ask for in prayer, believe that you have received it, and it will be yours." (Mk 11,23f) |
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3vcos
Joined: Oct 26, 2006 Posts: 106 Location: California
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Posted: Sat May 21, 2011 9:48 pm Post subject:
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Does anyone have a source for inductors for this project? |
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keithwin
Joined: Jul 20, 2007 Posts: 83 Location: uk
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Posted: Sun May 22, 2011 4:57 am Post subject:
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I'm after inductors too |
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vtl5c3
Joined: Sep 08, 2006 Posts: 425 Location: PDX
Audio files: 13
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sonicwarrior
Joined: Dec 22, 2005 Posts: 266 Location: Cologne, Germany
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mono-poly
Joined: Jul 07, 2004 Posts: 937 Location: Rotterdam, Netherlands
Audio files: 2
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Posted: Tue Jun 28, 2011 12:04 pm Post subject:
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Maybe we can do a groupbuy of inductors if the person wants to make some? |
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decaying.sine
Joined: Aug 31, 2009 Posts: 92 Location: New Haven, CT, USA
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Posted: Tue Jun 28, 2011 1:27 pm Post subject:
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I might be missing this in the documentation but I did look through it. What are the values for the 14 inductors in the 914, 3 board version? |
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vtl5c3
Joined: Sep 08, 2006 Posts: 425 Location: PDX
Audio files: 13
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Posted: Sat Jun 16, 2012 8:05 pm Post subject:
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For the 907 opamp GIC version, I'm thinking of duplicating the output summer so that there's one on each board. These would provide 'Odd' & 'Even' outputs. I will then sum those two outputs into another opamp and that will provide the 'Both' output. There's several unused opamp spots on the pcbs with the 907 design, so with at little bit of trace cutting, I'm going to hack the 'Both' opamp into the filter without a daughterboard. |
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