“A fantastic underrated tube, the Tungsram Hungary is one of the best guitar and audio tubes in existence.” Read
Tungsram ECC85
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H.H Scott LK-150 Power Amplifier
The H.H. Scott LK-150 is a truly captivating piece of high-fidelity engineering. Aesthetically and physically, the amplifier is a marvel; its output transformers are exceptionally large—surpassing even those of the McIntosh MC 275—and are arguably the most substantial ever utilized in a KT88-based design. Following a restoration that included replacing the original capacitors with Solen FastCaps, the performance was immediate and arresting. Despite the use of relatively budget-friendly components, the LK-150 manages to outperform the MC 275 in several key sonic categories.
Continue readingTo Match or Not to Match – Power Tubes
A few articles to help you figure out if matching is important for you.
Mullard EL34 Metal Base
Tung-Sol 5687 Horse Shoe getter
Genalex 12ax7/B759 Russia
RCA 5687 Black Plates O-getter
GE 5 Stars 5687 Black Plates Holes in Plate
Amperex 7316 Short Plates D-getter
The Sound of Rectifier
A common debate among audiophiles is whether the choice of rectifier tube significantly alters the sonic profile of an amplifier. To investigate this, I conducted a series of tests using a flexible amplifier circuit designed for a 5U4 rectifier, allowing for direct comparison with 5Y3, 5Z3, 5AR4, and solid-state alternatives.
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