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Old 9th November 2011, 02:12 AM   #1
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Default 6j4+6p6 hifi preamplifier kit!

6j4+6p6 hifi preamplifier kit, improve sound quality significantly, easy to build, best choice for beginners!

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Price: Only $128 plus shipping
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Last edited by siliconray; 9th November 2011 at 02:21 AM.
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Old 6th December 2011, 06:29 PM   #2
cc43fan is offline cc43fan  United States
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Hi,
Can you give me more information on the 6j4+6p6p+6z5p HiFi Tube Preamplifier Kit? Do you have a BOM and information about distortion, noise, gain, volume control tracking, and power consumption?

Thanks.
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Old 6th December 2011, 10:19 PM   #3
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Hi CC43fan:
here's the schematic for your reference:
Click the image to open in full size.

The performance is largely depend on how well it is built.
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Old 6th December 2011, 11:16 PM   #4
cc43fan is offline cc43fan  United States
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Let's assume it's built well, can you provide me with the info I requested?

Thanks.
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Old 7th December 2011, 12:15 AM   #5
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Tested with our preamp:
The distortion is less than 0.6% from 100 to 10KHz
Power consumption is about 60W. The transformer is 100W.
SNR: 88dB
Gain: about 10dB. could be adjustable by change value of feedback resistor
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Old 7th December 2011, 02:04 AM   #6
cc43fan is offline cc43fan  United States
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Quote:
Originally Posted by siliconray View Post
Tested with our preamp:
The distortion is less than 0.6% from 100 to 10KHz
Power consumption is about 60W. The transformer is 100W.
SNR: 88dB
Gain: about 10dB. could be adjustable by change value of feedback resistor
Thanks!
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Old 20th December 2011, 01:59 PM   #7
sled108 is offline sled108  United States
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Are the 6J4's in fact Soviet 6J4P's?
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Old 20th December 2011, 11:12 PM   #8
cc43fan is offline cc43fan  United States
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Quote:
Originally Posted by sled108 View Post
Are the 6J4's in fact Soviet 6J4P's?
Still on the fence?
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Old 21st December 2011, 12:58 AM   #9
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No. they are different in shape and difference in electrical characters.
http://www.mif.pg.gda.pl/homepages/f...095/6/6J4P.pdf
http://www.mif.pg.gda.pl/homepages/f.../095/6/6J4.pdf
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Old 23rd December 2011, 12:19 PM   #10
sled108 is offline sled108  United States
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This is what I was referring to.... They sure look like the ones in the Kit...
6j4p, Tube 6j4p; Röhre 6j4p ID18935, Vacuum Pentode

Last edited by sled108; 23rd December 2011 at 12:27 PM.
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