Mundorf Supreme signal capacitors. ==== Tube preamplifier built by Lamm topology: - first stage: - 2 triodes connected in parallel - second stage: - SRPP stage. (configuration used in the model Lamm LL2.1) ==== Technical info: ====================== Case: - steel 1.5mm, - 10mm plexi front panel - legs - honeycomb structure Power Supply: - full tube power supply with 6C5S (6X5) + 6F3P (ECL82) tubes - new tubes (NOS) - heater power supply with CRC filter and LDO stabilizer - dedicated 60VA toroidal transformer Preamplifier: - 2x ECC82 Electro Harmonix + 2x 6N23P (tubes little used) - Mundorf Supreme signal capacitors - DALE, Panasonic, Philips Low Noise resistors, - oxygen-free copper (OFC) wiring - Neotech, - gold RCA sockets, - ALPS potentiometer - Remote Control for Volume. - double RCA outputs RCA for bi-amping configuration - Mute system when switching the device on / off ====================== Preamplifier built with proper grounding. It has a proven and refined power supply. NO HUM in usable audio signal. Advanced PSU provide stable operation and no hum , which is not easy to obtain with tube designs. Measurements show a noise separation of 100dB. The sound is very dynamic and at the same time smooth and analogue with better controlled bass than in classic tube topologies. A project with a great potential for modifications. It is very versatile device. As an ECC82, you can also use an ECC81 or a long-lived E80CC tube. These tubes do not cost a fortune yet :) I definitely recommend checking it out E80CC tubes as ECC82. The heater PSU has adequate perfomance. As an ECC88, you can also use an 6N1P or ECC85 tubes. On the last photos measurements with the given tubes: 2x ECC82 Electro Harmonix + 2x 6N23P |