power supply problem pop noise

prorms · 11th September 2007, 02:30 AM

iam using a lm317 lm337 circuit
keep getting pop noise every 15 sec
7volts and -7 volts

prorms · 11th September 2007, 02:34 AM

...

prorms · 11th September 2007, 02:36 AM

basic diode setup 4 diode

transfomer 14vct 0.250 mA

prorms · 11th September 2007, 01:10 PM

opamp iam using are opa134 lf351 iam have connect with no resistors just stright in

Dzsoni · 11th September 2007, 01:20 PM

Every 15 sec? Strange... LLOks like a capacitor-problem...

Value of PS caps in uF?
About 1000uF would be OK.

[On the margin I would use much higher rails for the OPAs, say +/-15V.]

prorms · 11th September 2007, 11:15 PM

was not the power supply section but it was the last part
of the preamp that goes to the power amp
preamp on its own powersupply and circuit form the power amp
in stead of using diff voltage i use like a battery

11th September 2007, 01:10 PM	#4
prorms diyAudio Member Join Date: Nov 2006	... opamp iam using are opa134 lf351 iam have connect with no resistors just stright in

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11th September 2007, 02:36 AM	#3
prorms diyAudio Member Join Date: Nov 2006	basic diode setup 4 diode transfomer 14vct 0.250 mA

11th September 2007, 01:20 PM	#5
Dzsoni diyAudio Member Join Date: Jun 2007	Every 15 sec? Strange... LLOks like a capacitor-problem... Value of PS caps in uF? About 1000uF would be OK. [On the margin I would use much higher rails for the OPAs, say +/-15V.]

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