Hoffman Amplifiers Tube Amplifier Forum

Amp Stuff => AmpTools/Tech Tips => Topic started by: tubeswell on April 24, 2016, 06:29:12 am

Title: Opamp testing tool
Post by: tubeswell on April 24, 2016, 06:29:12 am

I'm thinking I need a DIY tool for testing dual and occasional quad opamps when the need arises in the odd tube amp repair (like the Ampeg SVT-CL).


Anyone got any circuit experiences they care to share?


TIA

Title: Re: Opamp testing tool
Post by: sluckey on April 24, 2016, 06:56:49 am

I don't know of any dedicated tool for testing op amps. You could use a breadboard to build up circuits to test the chips. But as far as actual in circuit tests, I just use a scope to look at inputs, outputs, and power supply pins. A sig gen comes in handy for inserting a known repetitive signal such as sine wave.

Title: Re: Opamp testing tool
Post by: tubeswell on April 24, 2016, 03:34:33 pm

After some inquiry these two sites look quite useful


http://guitar-fx-layouts.42897.x6.nabble.com/Simple-Op-Amp-Tester-td27924.html#a29226 (http://guitar-fx-layouts.42897.x6.nabble.com/Simple-Op-Amp-Tester-td27924.html#a29226)


https://tangentsoft.net/elec/vgrounds.html (https://tangentsoft.net/elec/vgrounds.html) and https://tangentsoft.net/elec/opamp-tester.html (https://tangentsoft.net/elec/opamp-tester.html)