6L6GC Hi-Fi SE Vacuum Tube Stereo Amplifier

Home-brewed 4tubes Stereo Amplifier.
Final stage : 6L6GC Hi-Fi (TOSHIBA) Single Ended, Self Bias for control Grid UL(Ultra Linear) connected to the screen grid
Drive stage : 6SQ7-GT (MATSUSHITA) Used only Triode Part
Output Transformer : TANGO FE-12S
Power Rectifier : 1N4007x2 Voltage Doubler (Rectifiing Tube 5U4GB is Dummy)
Power Transformer : PV-145 Sansui
Filter Choke Coil : 5H 200mA Sansui
VU Metering : Cheap Analog 200uA?
Speakers : Kenwood S-5GV
Music Source : Windows Vista PC (MP3)
Movie : Filmed by Nikon D5000 (HD)
Built in Aug. - Oct. 2009

Category:

Science & Technology

Tags:

• 真空管アンプ
• オーディオ
• Vacuum
• Tube
• Hi-Fi
• Amplifier
• 6L6GC
• 6SQ7-GT
• End
• of
• the
• world
• Emi
• Fujita
• 藤田恵美

[paulj0557]

What is the difference between a 6SQ7-GT and a 6SN7? I recently bought a 1946 Wurlitzer Orgatron model 31 & a Wurlitzer 310 rotary speaker tone cabinet. the 310 cabinet has a 15 in. below facing down & a 10 in.facing up with the metal rotary baffle above this. Also in this upper compartment are two Wurlitzer 6431 amp chassis w/ 2-6L6's a 6SN7 and a 5U4 rectifier tube.

The Electrostatic organ design of the late 20's is most amazing!

See patents in the comments on vid 'WurliTzer Organ Stoplist'

[Harry3River]

@paulj0557 Thanks for comment. Yes at the design stage I think to use 6SN7 but actually 6SL7, I mentioned befoe on this board that I picked 6SQ7-GT, the first reason is on-hand and second is looks so nice especially base metal part. I've got same of 6SN7 and 6SL7 but base black plastic part is not shine. final reason is 6SQ7's amplitude ratio (μ)is 100, so could be get enough gain same as half of 12AX7. also 6SQ7 was used as 5 tube Super Het Radio, so we can get NOS still in the market. thanks!

[IcechickenSr]

Very nice job! Is the power output meter just a rebuild VU meter? or is it an actual watt meter like you see on the old marantz power blocks and on the old macintosh amps? I would very much like to find meters such as these for my project. Cheers, IC.

[Harry3River]

@IcechickenSr Thanks for your commnt, I don't know detail of Maranz circuit sorry. This mater is not mesuring output power exactly but just kind of decoration, so schematic is simple just connected sp terminal to the meter with 1N60 diode and 1K resistor connected in series to the gnd, and R/L switch on the front of chassis. meter is charp approx 200 micro Amp and lighted with red LED. Please set VU meter on your next Amp project and please show me them on the net. Thanks! Harry@japan

[gusdrach]

Why does everybody listen to the same crappy music in this stereos?

[yoluismi]

Eso es un sonido cristalino y no lo de hoy en dia. Muy bueno!!

[peakhouse]

Thanks for post. Love the concentric cooling holes. love the power meter. love the industrial black cage. Great stuff !!

[darksith36]

the song is killing me yuck!

[eduazasmax]

FANTASTIC TUBE AMPLIFIERS,,,

[BladeRunner31415]

Wow ! 

[MrDimaRockMan]

Perfect it caresses my ears

Good man, i almost cry now :)

[Zhorellski]

Thinking of buying the new production of these stereo tube amps! any recommends? thanks!

[yousukekt66]

You sound great! 6L6GC tube is love.

ヾ(*´∀｀*)ﾉ

[howellfilm]

Nice work! I love tube amps.