[sdiy] lm308 replacement

[Ken Stone]

Of course, you can go to Small Bear and get the LM208 itself. (commercial
version of the LM308)
http://www.smallbearelec.com/Ordering/Stocklist.htm

>Hello Steve and Jim,>
>I heard the current Rat uses OP07 instead of LM308.
>That makes sense because OP07 is quite slow (Slewrate = 0.3 V/uS) and 
>low noise.
>
>Another trial I heard is TL070 or TL080 with large phase compensation 
>capacitor, which makes the opamp very slow.  They said the sound is very 
>close to the original Rat.
>
>Best,
>
>Sam Hoshuyama
>
>>          Man, that is a tough one...the LM308 was just a real dog when it 
>> came to speed....something like .1 V/uS slew rate.  Also, it had super-beta 
>> input transistors...if the LM308 was used to make the distortion, you 
>> probably will be hard pressed to find something that will sound like 
>> it.  If it was just used as an amplifier, well, probably almost anything 
>> would do...I would use a FET opamp to sub for it in that case...although, 
>> why anybody would use the LM308 as an audio amp I don't know...I suspect 
>> you have a real search on your hands.
>> 
>>          -Jim
>> 
>> At 03:26 PM 7/22/2003 -0400, Steve Begin wrote:
>> >I'm looking to build a proco rat distortion since it seems fairly simple 
>> >and well liked...although I'm open to suggestion (I'm looking for a hard 
>> >clipping overdrive that isn't particularily noisy).
>> >
>> >Does anybody know what I could use instead of an LM308?
>> >
>> >thanks,
>> >steve
>> 
>> 
>> 
>
>
_______________________________________________________________________
Ken Stone   sasami at hotkey.net.au  
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