buildanamp.wordpress.com
buildanamp | Just another WordPress.com site | Page 2
https://buildanamp.wordpress.com/page/2
Just another WordPress.com site. Okay, quick summary of the 7868 tubes that the Ampeg SB12 uses:. Power pentode with grid 3 connected to the cathode internally (so it looks like a tetrode). Max Plate Dissipation: 19W. Max Plate Voltage: 550V. Max Screen Voltage: 440V. Max cathode current: 85mA. Max Rg1: 0.3Mohm. Typical transconducatance: 10.2k uSiemens — in push-pull this means it needs about 20v P-P to drive full output power. So here are some other tubes i have been considering:. So, I think that I wo...
buildanamp.wordpress.com
October | 2011 | buildanamp
https://buildanamp.wordpress.com/2011/10
Just another WordPress.com site. All posts for the month October, 2011. In the transformer, but windings and impedance have a squared relationship, so the tube actually sees 1/4 of the rated impedance — 1.65k. This load line is drawn in red. For a discussion of how much the Fender Bassman power supply sags. Its almost 60V! Lets assume a sag of 50V, and that the current also sags down to 200mA. Our new maximum power output is a much more reasonable 32 Watts. October 25, 2011. The voltage swing at each out...
tubemaze.info
Tube Stuff - Tube Maze
http://www.tubemaze.info/tube-sites
Vacuum tubes and equipment reviews. Skip to primary content. Skip to secondary content. 8211; Our Ebay store with a large selection of fantastic tubes and very competitive prices. Let us know if you need anything specific by contacting us. 8211; ID any tube base on images. 8211; great resource for in-depth tube learning. 8211; great site with technical tube data. Their internal search sucks 🙁. 8211; another great tube data site. 8211; precise and super quick tester for preamp tubes. On TJ Full Music 6SN7.
tech.volkermeitz.de
Tech.Meitz
http://www.tech.volkermeitz.de/links
Vintage German Broadcast Gear. Leslie 122 / 147. Rane Pro Audio Reference. Kubarth German Vintage DOCS. Klaus Heyne's Mic Lab. Great compilation of literature and more. Author of several Pro Audio books. Excellent articles, various topics, great primer on trouble shooting / servicing. Actually about guitar amps, but lots of general info re. tube amp design! Author of "The Audio Expert", lots of articles. Siemens V72 toTAB U373 to Neumann W495, loads of Transformer specs. More resources for vintage stuff.