Synth-DIY Yahoo! Groups Archives

Thread

Burst Gen Problem

2006-02-16 by cstella4

Hi. I am trying to get my first Burst Gen going and running into some problems. When I have
have all the chips in the 4017 gets really hot and twice blew a crator in the chip! I have
checked the active parts Diodes , Transistors and they are fine. I have soketed all the chips
and tried different manufactures. When I remove the 4017 The clock works and trigger
through works. As soon as I put back in the 4017 the clock never makes it to pin 14 of the
4017 and it gets hot. I have checked the traces and for shorts etc.

Richard did metion to me to get all TI parts. I have a TI 4017 and I am awaiting a TI 40106to
see if that solves the problem. But from what he told me and what I have read on the list it
seemed that a chip mismatch would cause false triggering etc. But this seems to be
something else?

I have replace the LM358 with a TL072 and LT1013. No difference. Please help!

Thanks, Charles.

Re: Burst Gen Problem

2006-02-16 by sasami@hotkey.net.au

You aren't running it on +/-15 isnstead of +15/0V are you? You have a
serious over-voltage problem if craters are appearing.

Ken

Show quoted textHide quoted text

>Hi. I am trying to get my first Burst Gen going and running into some

problems. When I have

>have all the chips in the 4017 gets really hot and twice blew a crator in

the chip! I have

>checked the active parts Diodes , Transistors and they are fine. I have

soketed all the chips

>and tried different manufactures. When I remove the 4017 The clock works

and trigger

>through works. As soon as I put back in the 4017 the clock never makes it

to pin 14 of the

>4017 and it gets hot. I have checked the traces and for shorts etc.
>
>Richard did metion to me to get all TI parts. I have a TI 4017 and I am

awaiting a TI 40106to

>see if that solves the problem. But from what he told me and what I have

read on the list it

>seemed that a chip mismatch would cause false triggering etc. But this

seems to be

>something else?
>
>I have replace the LM358 with a TL072 and LT1013. No difference. Please help!
>
>Thanks, Charles.
>
>
>
>
>
>
>
>
>The CGS Modular Synth home page: http://www.cgs.synth.net/
>
>Yahoo! Groups Links
>
>
>
>
>
>
>

_______________________________________________________________________
Ken Stone sasami@... or sasami@...
Modular Synth PCBs for sale <http://www.blaze.net.au/~sasami/synth/>
Australian Miniature Horses & Ponies <http://www.blaze.net.au/~sasami/>

Re: Burst Gen Problem

2006-02-17 by Charles Stella

Hi. Thanks for the response. No I am running it only a +15V. the -15
pad from the power connector is not connected. I traced the problem
to a bad transistor on the End out. No everything is fine voltage
wise and no more smoke and craters : although that was kinda fun :)

Now I think I am facing the chip incompatibility problem that Richard
discussed. I am getting no burt pulses just a repeat of the trigger.
It is following the internal clock. Right now I have

TI - 4017

Fairchild - 40106

Tomorrow I receive my TI 40106's so hopefully that will get me
bursting away. I'll report back tomorrow. Thanks, Charles.

Show quoted textHide quoted text

On Feb 16, 2006, at 2:06 PM, sasami@... wrote:

> You aren't running it on +/-15 isnstead of +15/0V are you? You have a
> serious over-voltage problem if craters are appearing.
>
> Ken
>
>
>> Hi. I am trying to get my first Burst Gen going and running into some
> problems. When I have
>> have all the chips in the 4017 gets really hot and twice blew a
>> crator in
> the chip! I have
>> checked the active parts Diodes , Transistors and they are fine. I
>> have
> soketed all the chips
>> and tried different manufactures. When I remove the 4017 The clock
>> works
> and trigger
>> through works. As soon as I put back in the 4017 the clock never
>> makes it
> to pin 14 of the
>> 4017 and it gets hot. I have checked the traces and for shorts etc.
>>
>> Richard did metion to me to get all TI parts. I have a TI 4017 and
>> I am
> awaiting a TI 40106to
>> see if that solves the problem. But from what he told me and what
>> I have
> read on the list it
>> seemed that a chip mismatch would cause false triggering etc. But
>> this
> seems to be
>> something else?
>>
>> I have replace the LM358 with a TL072 and LT1013. No difference.
>> Please help!
>>
>> Thanks, Charles.
>>
>>
>>
>>
>>
>>
>>
>>
>> The CGS Modular Synth home page: http://www.cgs.synth.net/
>>
>> Yahoo! Groups Links
>>
>>
>>
>>
>>
>>
>>
> ______________________________________________________________________
> _
> Ken Stone sasami@... or sasami@...
> Modular Synth PCBs for sale <http://www.blaze.net.au/~sasami/synth/>
> Australian Miniature Horses & Ponies <http://www.blaze.net.au/
> ~sasami/>
>
>
>
> The CGS Modular Synth home page: http://www.cgs.synth.net/
>
> Yahoo! Groups Links
>
>
>
>
>
>

Re: Burst Gen Problem

2006-02-17 by Charles Stella

Ok so I got my TI 40106's. Still not working correctly. The clock
follows the trigger in on the output. Rate works etc. But no bursts.
If I toggle the rotary switch between positions I occasionally here a
quick burst. Any help would be greatly appreciated. Thanks, Charles.

Show quoted textHide quoted text

On Feb 16, 2006, at 2:06 PM, sasami@... wrote:

> You aren't running it on +/-15 isnstead of +15/0V are you? You have a
> serious over-voltage problem if craters are appearing.
>
> Ken
>
>
>> Hi. I am trying to get my first Burst Gen going and running into some
> problems. When I have
>> have all the chips in the 4017 gets really hot and twice blew a
>> crator in
> the chip! I have
>> checked the active parts Diodes , Transistors and they are fine. I
>> have
> soketed all the chips
>> and tried different manufactures. When I remove the 4017 The clock
>> works
> and trigger
>> through works. As soon as I put back in the 4017 the clock never
>> makes it
> to pin 14 of the
>> 4017 and it gets hot. I have checked the traces and for shorts etc.
>>
>> Richard did metion to me to get all TI parts. I have a TI 4017 and
>> I am
> awaiting a TI 40106to
>> see if that solves the problem. But from what he told me and what
>> I have
> read on the list it
>> seemed that a chip mismatch would cause false triggering etc. But
>> this
> seems to be
>> something else?
>>
>> I have replace the LM358 with a TL072 and LT1013. No difference.
>> Please help!
>>
>> Thanks, Charles.
>>
>>
>>
>>
>>
>>
>>
>>
>> The CGS Modular Synth home page: http://www.cgs.synth.net/
>>
>> Yahoo! Groups Links
>>
>>
>>
>>
>>
>>
>>
> ______________________________________________________________________
> _
> Ken Stone sasami@... or sasami@...
> Modular Synth PCBs for sale <http://www.blaze.net.au/~sasami/synth/>
> Australian Miniature Horses & Ponies <http://www.blaze.net.au/
> ~sasami/>
>
>
>
> The CGS Modular Synth home page: http://www.cgs.synth.net/
>
> Yahoo! Groups Links
>
>
>
>
>
>

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