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-   -   6j4+6p6 hifi preamplifier kit! (https://www.diyaudio.com/forums/siliconray-online-electronics-store/200120-6j4-6p6-hifi-preamplifier-kit.html)

siliconray 9th November 2011 02:12 AM

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

The link

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Price: Only $128 plus shipping

cc43fan 6th December 2011 06:29 PM

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.

siliconray 6th December 2011 10:19 PM

Hi CC43fan:
here's the schematic for your reference:
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The performance is largely depend on how well it is built.

cc43fan 6th December 2011 11:16 PM

Let's assume it's built well, can you provide me with the info I requested?

Thanks.

siliconray 7th December 2011 12:15 AM

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

cc43fan 7th December 2011 02:04 AM

Quote:

Originally Posted by siliconray (https://www.diyaudio.com/forums/siliconray-online-electronics-store/200120-6j4-6p6-hifi-preamplifier-kit-post2809679.html#post2809679)
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! :)

sled108 20th December 2011 01:59 PM

Are the 6J4's in fact Soviet 6J4P's?

cc43fan 20th December 2011 11:12 PM

Quote:

Originally Posted by sled108 (https://www.diyaudio.com/forums/siliconray-online-electronics-store/200120-6j4-6p6-hifi-preamplifier-kit-post2828067.html#post2828067)
Are the 6J4's in fact Soviet 6J4P's?

Still on the fence? :)

siliconray 21st December 2011 12:58 AM

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

sled108 23rd December 2011 12:19 PM

This is what I was referring to.... They sure look like the ones in the Kit...
6j4p, Tube 6j4p; Röhre 6j4p ID18935, Vacuum Pentode


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