Have received a request from someone who has a DIY tube preamp from the 80s. It has 4 ecc83 in the phono stage and one ecc82 in the line stage per channel. An error has occurred and I have received a request to take a look at the amplifier. There is a separate power supply with a rectifier tube (type unknown) 6x4 or similar, as well as an el34. In the front it says: Stereo Hybrid preamp, so there are probably some transistors in the circuit as well. Does anyone come up with a diy preamp with tubes that people built in the eighties with these tubes, which were hybrid.? The pictures say very little. Haven't received it yet. A typo on the front. Standbuy instead of Standby!
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May be a passive RIAA between two gain blocks: two paralleled CC-two paralleled CF-RIAA-two paralleled CC-two paralleled CF
See TubeCad for a similar circuit.
Power supply is a series pass 6CA7/EL34 regulator.
See TubeCad for a similar circuit.
Power supply is a series pass 6CA7/EL34 regulator.
Maybe there aren't that many people out there in the space who built tube preamps in the eighties? But with four ecc83 tubes per channel on the phono stage, might be a bit special?, and hybrid as well?