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Cascade Tubes

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Tag Archives: 6EM7

Bloodwood Spud Progress

Posted on July 22, 2026 by Matt
Reply

The wiring on the top plate for the 6EM7 “Bloodwood” Amplifier is essentially complete.

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Posted in Uncategorized | Tagged 6EM7, Bloodwood, spud, wiring | Leave a reply

Now for the Fun Stuff

Posted on July 18, 2026 by Matt
5

After several false starts, and a couple of minor reshufflings, The power supply side of the new amp is complete. Now it’s time to finish up the actual amp stages and get the top plate on the chassis.

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Posted in Uncategorized | Tagged 6EM7, Bloodwood, power supply, spud, wiring | 5 Replies

Progress on the Spud

Posted on June 27, 2026 by Matt
2

I managed to get some time to perform the bulk of the chassis work on the new amp.

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Posted in Uncategorized | Tagged 6EM7, Chassis, metal, spud | 2 Replies

Well Worth the Trouble

Posted on June 18, 2026 by Matt
2

Just a quick note on the new project. Ten days ago I posted about how much trouble the wood gave me because of warps and twists in my plank of Bloodwood. Well, today I can say that it was well worth the effort.

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Posted in Uncategorized | Tagged 6EM7, Bloodwood, Chassis, metal | 2 Replies

Revising the Dual Spud

Posted on June 2, 2026 by Matt
4

Those paying attention to my post from May 9th already know I have a new project coming. This one is nothing new or Earth shaking. Just a slight performance upgrade to the 6EM7 Vertical Amp in a more traditional chassis.

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Posted in Uncategorized | Tagged 6EM7, amp, performance, spud, xpwr013 | 4 Replies

A Quick Note on Amplifiers

Posted on March 20, 2024 by Matt
9

I’ve been moving some amplifiers around today, listening to some that have been idle for a while and doing a little side-by-side comparison. And I’ve been reminded of a very important fact about amplifier performance.

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Posted in Uncategorized | Tagged 6EM7, Design, SET, triode | 9 Replies

The Morning SET Swap

Posted on March 26, 2022 by Matt
4

This morning as I sat down in my office to check email and the like, I looked over at the amp in the corner of the room and made a snap decision. It was time to perform a SET swap.

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Posted in Uncategorized | Tagged 6CY7, 6EM7, color, SET | 4 Replies

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Articles of Note

  • “Experts” 0
  • A Note on Feedback 0
  • A Tale of Two Tubes 0
  • About that Volume Control 0
  • About that Volume Control – Part II 0
  • About Tube Books 0
  • Another Note on Feedback with Black's Original Paper 0
  • Audio Heresy – Lampizator 0
  • Audio Power – Wikilink 0
  • Cathode Bypass and Frequency Range 0
  • Cathode Bypass and Frequency Range, Part II 0
  • Component Tolerances & Modern Manufacturing 0
  • Consequence of The Quest for 20Hz Roll Off 0
  • Distortion Misunderstood 0
  • Engineering! 0
  • How Amp Technology Affects Volume and Power 0
  • How Much Audio Bandwidth? 0
  • Identifying a Mystery Tube 0
  • In Praise of the Album 0
  • Low Frequency Output Transformer Performance 0
  • Matt's Grounding Philosophy 0
  • Sensitivity and Amp Power – Chuck Hawks 0
  • Talking about SETs 0
  • The Quest for 20Hz Roll Off 0
  • Toroids and “Shorted Turns” 0
  • Tube Sound – Power Stage Topology 0
  • Tube Testers 0
  • Understanding Speaker Power Ratings – Eminence 0
  • Volume Controls and High Frequency Response 0
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