Linear Audio High-voltage Delay for Tube Amplifiers V4This high voltage delay for tube amplifiers was designed by Jan Didden of Linear Audio and published in the October 2019 issue of audioXpress. Construction and article download Full schematics, board layout, parts list and construction tips are in the audioXpress article. Our friends at AX have courteously agreed to make the article available for free download for diyaudio members. The Bill of Materials is in the article. Note that the kit as provided

These boards are intended for adventurous / advanced DIYers willing to dedicate their own time to research what's needed to complete their project

Douglas Self: "Self-Improvement for Capacitors" and "A Low-Noise Preamplifier with Variable-Frequency Tone Controls"

the audio performance – gain and distortion in particular – are dependent on the circuit implementation

the ever-creative Zen Mod created his 'Babelfish' version using readily available output devices

Maximum Ratings – Nutube 6P1

to increase gm and lower the noise level

F5T v3 - 100 Watts into 8ohm

Headphone Jack (Neutrik NMJ6HF-S

This PEM is not compatible with previous versions of the Deluxe chassis

I am running my 86 dB / 3

allowing you to drop in Japanese 2SA/2SC transistors (pinout ECB) or European BC transistors (pinout CBE) or American 2N transistors (pinout EBC) however you please

This may shorten tube life