6DN7 tube HiFi Amp MORE mods Part 3 // New transformers, resistors and Constant Current Device.

In this video I install new output transformers, new resistors, new capacitors and a Solid State Constant Current Source to refine this amplifier even more!

This amp produces around 1.5 - 2 watts of sonic goodness! (I'm still blown away!) These TV tubes have a wide range 25Hz - 21,000Hz (dependant on the OT used) Deep bass, crisp/bright highs and a wide sound stage.

Specs:
Two 6DN7 vacuum tubes (1 per channel)
Two 5k Primary - 8ohm output transformer (Edcor XSE 10-8-5k)
One 275-0-275 ~80ma power transformer (i.e. Hammond 270CX, 270DV, 271X)

The circuit shown is a mixture of topologies that I have built over the years. It is not unique and few will notice similarities between various circuits posted in tube literature and various DIY Forum/Communities. I do not assume any ownership of this design. This is posted for hobby use only. Feel free to copy, adjust and modify.

The Original Build: https://youtu.be/0svrcbY2mLA

Output transformer: https://edcorusa.com/products/xse10-5k-10w-5k-ohms-single-ended-tube-output-transformer

Kiwame Resistors: https://www.partsconnexion.com/KIWAME-66280.html

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

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https://www.buymeacoffee.com/MikeFreda

Amp with CCS Schematic: https://drive.google.com/file/d/1pIVhREY_eOMx74bKuYphmVjoraV63xzp/view?usp=sharing

CCS Worksheet: https://drive.google.com/file/d/1GY2-F9jNgyu_LSgFs-WKbbBMdKsrYXAY/view?usp=sharing
For more information regarding Constant Current: diyAudio Tube Constant Current Source Board Project: https://www.diyaudio.com/community/attachments/diyaudio-ccs-beta2_-zip.249066/

Original Schematic: https://drive.google.com/file/d/1hQbL-HK_ATzb-0PRGwFTesEGwO2fILTC/view?usp=sharing

Original Parts list: https://drive.google.com/file/d/1liDqfa_4JJo-dRyfa5ji_feFQoRs19LT/view?usp=sharing

Alternate Filament supplies: https://drive.google.com/file/d/1oo-jQPHp9MJe6O-CILmuAxbsJR1Z5ix2/view?usp=sharing

6DN7 Tube Data Sheet: https://drive.google.com/file/d/1u8c1cH_inqBglJmelY2VCorFeXBX-nY4/view?usp=sharing
Tubes: https://www.thetubestore.com/6dn7

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

0:00 Intro
3:28 Output Transformers
7:12 CCS

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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