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: edcorusa.com/en-ca/products/x...
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Valve Amplifiers - Morgan Jones - amzn.to/43wQjNc
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6SN7 Preamp build: • Making a 6SN7 Tube Lin...
Preamp Schematic: drive.google.com/file/d/1VYth...
Basic Layout:
drive.google.com/file/d/1xopN...
Parts List: drive.google.com/file/d/1Kzsn...
CCS Worksheet: drive.google.com/file/d/1GY2-...
Alternate Filament supplies: drive.google.com/file/d/1oo-j...
5670 Tube Data Sheet: www.tubesandmore.com/sites/de...
Tubes: www.thetubestore.com/jan-ge-5...
www.tubesandmore.com/products...
IU Chassis: 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: amzn.to/3PvQaD7
Kester Solder: 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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