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jhaible
Joined: May 25, 2007
Posts: 2014
Location: Germany
Audio files: 24
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 Posted: Sun Feb 13, 2011 6:34 am Post subject:
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| zarko wrote: | Hello Jürgen.
in my modular i have some attenuators pots, so i decided to omit the 10K log input pot, but the problem is that i can't leave the input aux without a jack plug in, if i don't do that i dsitoy my ears and speakers 
I try to solder a 10k resitor between ground and aux in but it's the same problem. For the moment i disconnect the comon of the feedback mode switch.
Would you tell me if there is an other solution to resolve this problem
without add a pot on the front panel because there is no place left.
Thank you.
Have a nice day.
Regards Fred. |
Make sure that the ccw end of the pot is grounded! - Then it should fully attenuate when in ccw position.
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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sduck
Joined: Dec 16, 2007
Posts: 421
Location: Nashville
Audio files: 5
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| Posted: Sun Feb 13, 2011 8:12 pm Post subject:
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| The wiring diagram as provided has a feedback circuit in it. If you delete the pot you've deleted an essential part of the feedback circuit. So yes, you'll need to disconnect the wire from the center of the feedback switch, and just do your feedback outside of the module if you choose to. The feedback circuit isn't essential to the operation of the frequency shifter, but it is a nice added touch. |
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jhaible
Joined: May 25, 2007
Posts: 2014
Location: Germany
Audio files: 24
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| Posted: Mon Feb 14, 2011 12:42 am Post subject:
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| sduck wrote: | | The wiring diagram as provided has a feedback circuit in it. If you delete the pot you've deleted an essential part of the feedback circuit. So yes, you'll need to disconnect the wire from the center of the feedback switch, and just do your feedback outside of the module if you choose to. The feedback circuit isn't essential to the operation of the frequency shifter, but it is a nice added touch. |
Thank you, sduck. I completely missed the part about the missing pot, and concluded there must be a mis-wired pot.
So, yes, it's all clear: You *need* that pot for proper feedback operation. But you can have a nice FS entirely without feedback also. Just what sduck says.
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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zarko
Joined: Mar 25, 2010
Posts: 22
Location: France
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| Posted: Mon Feb 14, 2011 1:12 pm Post subject:
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Thanks i gone try to add this pot on the front panel  |
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zarko
Joined: Mar 25, 2010
Posts: 22
Location: France
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| Posted: Tue Feb 15, 2011 10:58 am Post subject:
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Hi
I find a solution for not drilling an other hole pot.
i replace the two 100K lin mix pot ,by a dual 100K, and in the free place, the aux level pot.
Now the feedback mode is fully functional
Great and fat sound, Thanks Jürgen  |
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slaughterhousesam
Joined: Aug 27, 2010
Posts: 16
Location: london
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| Posted: Sat May 07, 2011 4:15 pm Post subject:
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hey guys, finished mine a few months back, took the extra time measuring components as well as i could and working with the xls, and seem to have come up trumps. carrier bleedthrough is for all intents and purposes, nil.
think this has new favourite module written all over it.
guess i just wanted to put a big hearty "thanks Jurgen" out there 
nice one mate, thanks for your trouble, and your time, in doing this and making it available |
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subkontrabob
Joined: May 24, 2011
Posts: 3
Location: Germany
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| Posted: Tue Aug 09, 2011 6:41 am Post subject:
a few questions..... |
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Hi,
I'm currently finishing my FS-1A build. I'm going to put it in a 19" enclosure, and add a few extra connectors and goodies.
I have a few questions:
1. What is the function of the dual LED/two LEDs marked "F_LED"? Is it the same dual LED Jürgen referred to as "Rate"? Hard to place them without knowing their purpose.
2. I want to make the quadrature triangle signals available at the front panel like lexvortex mentioned in a previous post. Can I do that by simply connecting jacks to the SigSin and SigCos outputs on board 1?
3. Same question for the SumOut and Diff Out: Can i just connect a jack in parallel to the rest of the stuff?
4. I want to add external input jacks for the buffer inputs. I've been thinking about adding a pot to be able to mix between the external input jack and the dry/wet pot. Would that make sense? I guess I would have to use shielded wire for the connection?
That's all I can think of at the moment. The front panel is going to be stuffed!! 
_________________
best regards,
Bob |
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mph
Joined: Aug 25, 2007
Posts: 66
Location: France
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| Posted: Mon Aug 22, 2011 3:01 pm Post subject:
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Hi
I'm finishing to populate the boards, and I'm not sure about the 2SA733's position. Should I use the "real" pcb silkscreen, or this document:
http://www.jhaible.de/fs1a/fs1a_overlay_main_board.pdf
On my pcb the trannies should be in the opposite side as on the pdf.
Thanks a lot for your help. |
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jhaible
Joined: May 25, 2007
Posts: 2014
Location: Germany
Audio files: 24
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| Posted: Mon Aug 22, 2011 4:19 pm Post subject:
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| mph wrote: | Hi
I'm finishing to populate the boards, and I'm not sure about the 2SA733's position. Should I use the "real" pcb silkscreen, or this document:
http://www.jhaible.de/fs1a/fs1a_overlay_main_board.pdf
On my pcb the trannies should be in the opposite side as on the pdf.
Thanks a lot for your help. |
The PCB silkscreen is right. (The emitters, pins 1, are connected together.)
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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zthee
Joined: Feb 20, 2008
Posts: 411
Location: Stockholm
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jhaible
Joined: May 25, 2007
Posts: 2014
Location: Germany
Audio files: 24
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| Posted: Mon Oct 10, 2011 3:23 pm Post subject:
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| zthee wrote: | | Would it be possible to power 2 FS1A from just one on board PSU? |
Yes. But only if you have big enough heat sinks.
The location of the power regulators is - admittedly - a bit unfortunate to attach good heat sinks to them, though. But if you find a goot thermal + mechanical solution for getting the heatt off the voltage regulators, it will work.
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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zthee
Joined: Feb 20, 2008
Posts: 411
Location: Stockholm
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