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Author Topic: Electronics help needed - Switching problem  (Read 2166 times)

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Chris_H

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Re: Electronics help needed - Switching problem
« Reply #15 on: 31 July 2009, 11:35:16 »
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A simpler solution :question may be to use a low gain or unity gain low noise amp immediately after the guitar, this would buffer the guitar pickups from seeing fluctuating loads.
My take on it is that the units are not matched to each other properly.  These days most audio gear is low into high (impedance).  That means that output capacitors can be low value and hence small.  If the input impedance of the second effects unit is too low, you will get high frequency roll-off.

If that is the case then a series resistor between the two will lose you a bit of level but bring back the HF.

I hope you get a tidy solution Al.
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Marks DTM Calib

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Re: Electronics help needed - Switching problem
« Reply #16 on: 31 July 2009, 12:24:59 »
A good assumption except, just be aware that the guitar has a coil.....so the input to effects pedals are a little weird in some circumstances
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Marks DTM Calib

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Re: Electronics help needed - Switching problem
« Reply #17 on: 31 July 2009, 12:27:05 »
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Chris_H

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Re: Electronics help needed - Switching problem
« Reply #18 on: 31 July 2009, 14:00:03 »
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This is worthy of a read

http://terrydownsmusic.com/technotes/pedal_circuits/pedal_circuits.htm
That will blow Al's mind I'm sure!
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Radiomarko

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Re: Electronics help needed - Switching problem
« Reply #19 on: 31 July 2009, 16:20:18 »
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A good assumption except, just be aware that the guitar has a coil.....so the input to effects pedals are a little weird in some circumstances

Absolutely. A guitar unless it has a pre-amp inside, is very sensitive to the load it looks at - affects the tone, timbre in fact every aspect of the sound. Some pickups only send out 100mV, easily lost and mucked up! Even cable capacitance can alter the sound, look how many connectors, loads and cables you want to switch in and out - the sound will change each time unless its buffered.

I spent ten years running a recording studio and PA organisation, my hair loss is easily explained by my dealings with guitarists.....   :-X   

Look here for really good info on this subject;

http://buildyourguitar.com/resources/lemme/
« Last Edit: 31 July 2009, 16:23:56 by markjeffs »
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Big_Al

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Re: Electronics help needed - Switching problem
« Reply #20 on: 31 July 2009, 21:40:57 »
Crikey!!!   

             I have opened up this big can ...  ;D and it's full of WORMS .......   ;D ;D   now they are wriggling  everywhere.. ;D ;D   SWMBO's going nuts! ;D ;D ;D

they're all over her furry rug! ;D ;D ;D ;D ;D

Sorry guys .. bit beyond me all this impedence, resistance, load etc.  :-[ :-[ :-[

If anyone wants to know how to put a plug on their kettle.. I'm your man  ;D ;D ;D ;D  lol ;D ;D ;D

Latest News: problem is on it's way to being sorted c/o Rob Lincs

 :y :y :y :y :y :y :y :y :y :y
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Radiomarko

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Re: Electronics help needed - Switching problem
« Reply #21 on: 31 July 2009, 21:42:22 »
LMAO - good luck, please feedback your results.
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Big_Al

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Re: Electronics help needed - Switching problem
« Reply #22 on: 31 July 2009, 21:51:19 »
Quote
Quote
[highlight]This is worthy of a read

http://terrydownsmusic.com/technotes/pedal_circuits/pedal_circuits.htm
That will blow Al's mind I'm sure[/highlight][/highlight]!



Got as far as the Multivibrator bit and SWMBO has  suddenly taken a big interest in the PC screen... ;D ;D ;D

As Marks DTM states... Mind is blown ... BIG Time.  All I wanna do is play the guitar ;D ;D ;D ;D ;D
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Chris_H

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Re: Electronics help needed - Switching problem
« Reply #23 on: 01 August 2009, 00:10:49 »
Quote
Quote
Quote
[highlight]This is worthy of a read

http://terrydownsmusic.com/technotes/pedal_circuits/pedal_circuits.htm
That will blow Al's mind I'm sure[/highlight][/highlight]!



Got as far as the Multivibrator bit and SWMBO has  suddenly taken a big interest in the PC screen... ;D ;D ;D

As Marks DTM states... Mind is blown ... BIG Time.  All I wanna do is play the guitar ;D ;D ;D ;D ;D
She would want an astable multivibrator.  The bistable one is boring.
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First Vauxhall - PABX Cresta; Previous, previous Vauxhall - 3.0 12v Senator CD; Previous Vauxhall Omega Elite 3.0V6 Saloon Auto
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