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Does anyone have a manual they would share? the 3600 and 3700 are available when I search, but no luck on this one. Thanks!

Hi everyone. I just picked up a Testo 557 digital manifold. On the manifold it has a connection for a big vacuum hose. I have not ran into hoses this size before, my local supply house doesn't know...

Hello, I am looking for the AMD1 accessory head for testing microwave oven diodes. If you have one for sale please contact me!

Thanks, -Ken