Tube Amplifiers by Patrick

Tube Amplifiers by Patrick

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Custom tube amp builds, repair and restoration.

04/16/2026

Well, I finally got around to doing a little bit of work on my 5F2A build.

The Valve Wizard 03/15/2026

https://www.valvewizard.co.uk/

The Valve Wizard How to design valve guitar amplifiers, from the power supply to output stage and pre amp

Photos from Tube Amplifiers by Patrick's post 03/07/2026

Change of plans for the 5F2A amp. I have decided to use a different chassis. This will end up being a "low profile cube" shaped head amp instead of a classic Champ style combo amp. This will allow me to easiIy hook up to whatever speaker cab I want to. The only drawback with the salvaged OT is that it wants to see a 4 ohm load. I could purchase a multi tap OT but for now I am going with this one. I can always upgrade the OT later when I have extra money, np. Anyway, I have some metal work to do and get the board populated. The caps and carbon film resistors are all NOS but I checked each one to make sure they are within tollerance just to make sure.

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