Cgs synth

>A couple of clues:
>
>1) You only need to do the modifications specific to your version of the
>
>board. Ver 0.2 modifications do not need doing.
>
>2) Decoupling capacitors are to keep the power rails stable. These parts are
>
>already on the PCB. You do not need to do anything extra.-Great, the

>
>
>
>I don't have any V0.4 left, so hopefully someone else can answer the questions.
>-Doh!-One more thing. I don't know what a "bead" is. Is it like a

>>["Cut the track between Pin 5 of the TL072 in the bottom right corner and
>
>the 47uF capacitor. Make the cut near the capacitor."]
>
>>
>
>>I can't find anywhere that pin 5 of the TL072 is connected to the 47uF
>
>capacitor. Pin 5 seems to be connected to a pad that is supposed to be a
>
>jumper wire. And that's another thing, in the Modifications for version 0.2
>
>it says to remove the jumper between pin 5 and the WS Trim. Should I still
>
>not put in the jumper or should I go ahead and do it since this is a later
>
>version.
>
>>
>
>>["Jumper pin 5 to the Saw AC output terminal via a 100k. This will set PWM
>
>control to 50% at 0 volts."]
>
>>
>
>>So, disregard the jumper that's marked on the PC board and just solder in a
>
>100K resistor between the hole at pin5 and the hole at Saw AC output?
>
>>
>
>>["It is possible to place the resistor in place of the link on the PCB
>
>though the track modification is still required."]
>
>>
>
>>I'm not sure what "link" means here.
>
>>
>
>>["Replace the 330k resistor near the SYNC pad with a 220k resistor. This
>
>should stop clipping."]
>
>>
>
>>I couldn't find any 330k resistor in this area.
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>[Non-text portions of this message have been removed]
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>
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>------------------------------------
>
>The CGS Modular Synth home page: http://www.cgs.synth.net/
>Yahoo! Groups Links
>
>
>
>

--- On Mon, 6/22/09, sasami@... <sasami@...> wrote:

From: sasami@... <sasami@...>
Subject: Re: [SPAM] Re: [SPAM] [cgs_synth] CGS48 VCO question
To: cgs_synth@yahoogroups.com
Date: Monday, June 22, 2009, 6:21 PM
























A bead is a ferrite bead on a piece of wire. If you can find one, just use a

wire link. (yes, a piece of wire from an old resistor leg for example).



Ken



>A couple of clues:

>

>1) You only need to do the modifications specific to your version of the

>

>board. Ver 0.2 modifications do not need doing.

>

>2) Decoupling capacitors are to keep the power rails stable. These parts are

>

>already on the PCB. You do not need to do anything extra.-Great, the

capacitors are already in then.

>

>

>

>I don't have any V0.4 left, so hopefully someone else can answer the questions.

>-Doh!-One more thing. I don't know what a "bead" is. Is it like a

resistor? thanks a lot. (I still have the remaining questions below if

anyone can help.)steve

>>["Cut the track between Pin 5 of the TL072 in the bottom right corner and

>

>the 47uF capacitor. Make the cut near the capacitor."]

>

>>

>

>>I can't find anywhere that pin 5 of the TL072 is connected to the 47uF

>

>capacitor. Pin 5 seems to be connected to a pad that is supposed to be a

>

>jumper wire. And that's another thing, in the Modifications for version 0.2

>

>it says to remove the jumper between pin 5 and the WS Trim. Should I still

>

>not put in the jumper or should I go ahead and do it since this is a later

>

>version.

>

>>

>

>>["Jumper pin 5 to the Saw AC output terminal via a 100k. This will set PWM

>

>control to 50% at 0 volts."]

>

>>

>

>>So, disregard the jumper that's marked on the PC board and just solder in a

>

>100K resistor between the hole at pin5 and the hole at Saw AC output?

>

>>

>

>>["It is possible to place the resistor in place of the link on the PCB

>

>though the track modification is still required."]

>

>>

>

>>I'm not sure what "link" means here.

>

>>

>

>>["Replace the 330k resistor near the SYNC pad with a 220k resistor. This

>

>should stop clipping."]

>

>>

>

>>I couldn't find any 330k resistor in this area.

>

>

>

>

>

>

>

>

>

>

>

>

>

>

>

>

>

>

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>

>

>[Non-text portions of this message have been removed]

>

>

>

>----------- --------- --------- -------

>

>The CGS Modular Synth home page: http://www.cgs synth.net/

>Yahoo! Groups Links

>

>

>

>

____________ _________ _________ _________ _________ _________ _

Ken Stone sasami@hotkey. net.au otherunicorn@ virginbroadband. com.au

Modular Synth PCBs for sale <http://www.cgs synth.net/>

Australian Miniature Horses & Ponies <http://www.blaze net.au/~sasami/>






























[Non-text portions of this message have been removed]