How to make a 5670 tube preamp // DIY HiFi single tube linestage

Scratch building a 5670 / 2C51 / 396A single tube preamp (linestage) for a 2 channel HiFi stereo system. Single amplification stage through a high quality Output Transformer. This will also drive a high impedance headphones. (i.e. AKG K240 600ohm)
This topology is known are Parallel Feed and it requires a high quality capacitor and an unique output transformer to function properly.

Specs:
600ohm output
~5-6 db of gain (depending on bias)
1-5670 vacuum tube (1 tube for both channel)
Two (2) 15k Pri - 600ohm Sec output transformer Magnequest B7 (or Edcor XSM 15k-600)
One 250vac ~25-45ma power transformer (i.e. Hammond 261C6)
CRCRC Power Supply

Output transformer: https://edcorusa.com/en-ca/products/x...

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Valve Amplifiers - Morgan Jones - https://amzn.to/43wQjNc

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Preamp Schematic: https://drive.google.com/file/d/1VYth...

Basic Layout:
https://drive.google.com/file/d/1xopN...

Parts List: https://drive.google.com/file/d/1Kzsn...

CCS Worksheet: https://drive.google.com/file/d/1GY2-...

Alternate Filament supplies: https://drive.google.com/file/d/1oo-j...

5670 Tube Data Sheet: https://www.tubesandmore.com/sites/de...

Tubes: https://www.thetubestore.com/jan-ge-5...
https://www.tubesandmore.com/products...

IU Chassis: https://leeselectronic.com/en/product...

WARNING: Tube amplifiers contain very high and potentially lethal voltages!
Drain all filter caps and check voltages before commencing work.

Hakko Solder Station: https://amzn.to/3PvQaD7
Kester Solder: https://amzn.to/3aJKNBI

Camera:
Canon M50 (Sigma 16mm 1.4f lens)
iPhone 11
Boya By-M1 Lavaliere Mic

Lighting:
Neewer CB100 Video Light
Neewer 26" Soft Box

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