TL064 substituted with TL084

karahara · 24th April 2006, 06:11 PM

Hello.

I've received an Guitar-pedal from a friend an found out that the Opamp was defect. So I changed a TL064-type with a TL084-type. The pedal now works fine, so my question is:

Is the 084 a suitable replacement for a 064?
Keep in mind that this things are powered by a 9V-Battery, so power consumption matters.

Thanks in advance for your help.

paulb · 24th April 2006, 06:51 PM

TL084 has higher power consumption, but less distortion. If that's the only active part in the unit, the battery will last maybe 6 to 8 times longer with the TL064. Other than that it should work fine.

karahara · 24th April 2006, 08:30 PM

Hi.

After telling him that he told me that he also could power it by 48V phantom power or wall wart, so it shouldn't be a problem.

Thanks for your info, paulb, helped me a lot.

edit:

Now I know, the number i have/had to look at is Iq.

TL064 Iq per channel(Max)(mA): 0.25

TL084 Iq per channel(Max)(mA): 2.8

Just for your/my information

neutron7 · 27th April 2006, 02:33 AM

what does the pedal do? if it is distortion or overdrive it will sound different than originally intended.

karahara · 27th April 2006, 11:05 AM

Hi.

It's an active DI-Box with Speakersimulation (RED BOX MK III, Hughes&Kettner), so the quad opamps are used as active filters.

If you are interested in such a schematic have a look here:
GeneralGuitarGadgets

24th April 2006, 06:11 PM	#1
karahara diyAudio Member Join Date: Dec 2003 Location: Germany - Bavaria	TL064 substituted with TL084 Hello. I've received an Guitar-pedal from a friend an found out that the Opamp was defect. So I changed a TL064-type with a TL084-type. The pedal now works fine, so my question is: Is the 084 a suitable replacement for a 064? Keep in mind that this things are powered by a 9V-Battery, so power consumption matters. Thanks in advance for your help.

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24th April 2006, 06:51 PM	#2
paulb diyAudio Member Join Date: Jun 2001 Location: Calgary	TL084 has higher power consumption, but less distortion. If that's the only active part in the unit, the battery will last maybe 6 to 8 times longer with the TL064. Other than that it should work fine.

24th April 2006, 08:30 PM	#3
karahara diyAudio Member Join Date: Dec 2003 Location: Germany - Bavaria	Hi. After telling him that he told me that he also could power it by 48V phantom power or wall wart, so it shouldn't be a problem. Thanks for your info, paulb, helped me a lot. edit: Now I know, the number i have/had to look at is Iq. TL064 Iq per channel(Max)(mA): 0.25 TL084 Iq per channel(Max)(mA): 2.8 Just for your/my information

27th April 2006, 02:33 AM	#4
neutron7 diyAudio Member Join Date: Dec 2003 Location: Toronto Canada	what does the pedal do? if it is distortion or overdrive it will sound different than originally intended.

27th April 2006, 11:05 AM	#5
karahara diyAudio Member Join Date: Dec 2003 Location: Germany - Bavaria	Hi. It's an active DI-Box with Speakersimulation (RED BOX MK III, Hughes&Kettner), so the quad opamps are used as active filters. If you are interested in such a schematic have a look here: GeneralGuitarGadgets

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