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Hey all! I have a bunch of wire from an old dead Model M Hammond organ. It’s fantastic to work with, nice push back cloth wire. I have been using it for the preamp circuit but am wondering if it will be okay for B+ or grounding connections. How can I determine the voltage rating of the cloth...

Against my better judgement, I thought I would post a thread on my recent conversion. I like doing these conversions but fear too much competition bidding on the chassis on ebay! I made a standard 5E3 with just a few minor updates--PI and power tube grid stoppers. The layout I had to invent. I...

Hello again, all! I bought a corroded, old Bogen E30 with the hopes of giving it a glorious second life. The Bogen E30 is a 6L6, cathode biased, paraphase, dual volume PA amp that has long since ceased to shush the churlish children of some long forgotten, godforsaken middle school. The...

Hello All! I recently brought a Harmony 305A amp back from the dead. As I created a voltage chart, a few questions came up concerning cathodyne phase inverters, and specifically the readings I was getting. I read Merlin Blencowe's chapters on cathode followers and cathodyne phase inverters, I...

Hello again, fine folks! I acquired the power transformer and output transformer from a stripped Hammond Model M organ. It is a PP 6V6 amp; originally, it came with a field coil speaker, which I will not use. After some research I decided to use the transformers to build a BF Princeton Reverb...

Hello all! Having finally received my kit from Weber, I have embarked on building a Torevibe. After a successful 5f2a, this is only the second build I have done. I still have a lot to learn, and I am hoping for some help from the amazing tinkerers here on the Shock Brothers forum. Question 1...

Hello! I have been making modifications to my early 60's Alamo Challenger and have a few questions. I have added the proper schematic below. I am in the process of adding two modifications: 1) adding switchable negative feedback to make the amp more pedal and humbucker-friendly, and 2) making...