Specifications

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Tweed 5E3 PCB Valve Junior Conversion
Build Manual v3.0 13 Feb 2011
37 of 40
9.2 Power Up without Tubes
9.2.1 The First Power Up
Make sure you are working is a safe area free of any flammable
chemicals or vapors. An assembly error may result in the emission of
sparks.
The tubes should NOT be installed during the initial power up.
Plug the amplifier into a speaker cabinet. Match the speaker
impedance with the appropriate output jack. Failure to connect a
speaker will cause harm and eventual failure of the output transformer.
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cord in the IEC mains connector.
Secure the black ground lead of your voltmeter to the chassis star ground lug.
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following voltages. If a significant deviation from these readings is observed, turn
off the amp, unplug the mains power and investigate.
These measurements will read high since there is no load on the transformer.