Cheap 6P3P SE Kit (with case) - diyAudio
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Old 3rd November 2011, 08:41 AM   #1
diyAudio Member
 
Join Date: Sep 2011
Default Cheap 6P3P SE Kit (with case)

Hello all

Our partner developed a high quality low cost 6P3P SE kit for DIYers,

Features and spec:
5Z4P tube rectifier
6N1 preamplifier
6P3P power amplifier
Output Power 7Wx2
Load: 4Ohm or 8Ohm
Silkscreen stainless steel + wood enclosure

Part List
Power supply transformer 260v*2 6.3v 5v 3.15v*2
Output transformer 3.5k: 4 8 *2
Power supply choke coil 5H*1
Enclosure *1
Enclosure foot *4
RCA connector for input *2
Output connector *6
Power jack *1
Power cable *1
Power switch *1
Potentiometer 100K*1
Voice knob *1
Shuguang 5z4p new in stock *1
Shuguang 6n1 new in stock *1
Shuguang 6p3p new in stock *2
8Pin tube socket *3
9pin tube socket *1
47uf/400v *1
330uf/450v *1
22uf/400v *1
470uf/50v *2
0.22uf/160 *2
1k *2
47k *2
330 *2
470k *2
22k *1
220k *1
Shielded cable 30cm
Cannula 15cm
Soldering cable 3m
3mm 4mm screw 16set each
Schematic 1
Instruction Manual 1


Photos:
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Price: $136 for retail. PM for multiple orders or group buy. Package weight about 9-10kg, the more the order, the lower average shipping cost.
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Old 11th November 2011, 06:10 PM   #2
OleBull is offline OleBull  Norway
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Join Date: Jan 2011
Hi,

This looks like a nice "father and son" project. What power input voltages can it be used with?

Best regards!
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Old 12th November 2011, 12:53 AM   #3
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Hi Olebull

The power is 220V. 110V can be made by customer's requirment.
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Old 15th November 2011, 12:46 AM   #4
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Schematic:
Click the image to open in full size.
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Old 15th November 2011, 12:54 AM   #5
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Assembly instruction
1. Assemble valve socket, audio input socket, audio output socket, power socket and power switch.
2. Install power transformer and output transformer.
3. Check assorted resistor and capacitor .Test whether audio input socket, audio output socket, power socket, power switch, power transformer and output transformer are shorted with chassis.
4. Connect valve filament line of power transformer and output transformer with relevant sockets.
5. Install resistor and capacitor of power-amplifier after installation of resistor and capacitor of preamplifier.
6. After soldering, check whether each solder point and connection of circuit is the same with graphic expression in electrical schematic diagram.
7. Test whether the voltage of power output and valve filament is right. (It is normal that no-load voltage is higher.)
8. Plug in rectifying tube, and then check whether power is the same with graphic expression in electrical schematic diagram. (It is normal that no-load voltage is higher.)
9. Check whether complete machine connects with valve socket. (It is normal that no-load voltage is higher.)
10. Plug in power amplifier when voltage of valve filament is right. Check whether cathode voltage is the same with graphic expression in electrical schematic diagram.
11. Then plug in preamplifier valve, and test whether working point is familiar with graphic expression in electrical schematic diagram. If it is ok, signal can be inputted to test the sound.
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Old 23rd November 2011, 05:29 AM   #6
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Join Date: Oct 2011
Default my tube amplifier

I finished the assembly today. It's not easy work for a newbie like me. But finally I manage to get it work. The sound is great, but the only thing I dislike is stainless steel chasis is too sharp and it scratched my finger.
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File Type: jpg DSCN8917.jpg (190.7 KB, 190 views)
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Old 1st December 2011, 06:38 AM   #7
Whiting is offline Whiting  Australia
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Join Date: Mar 2008
Hi, Jeffrey

Looking Good, I'm contemplating on purchasing one of these kits. What speakers and efficiency are they that your using.
Does the 220v power supply run hot at all with the 240v mains power you have there.

Cheers
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Old 1st December 2011, 11:41 AM   #8
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Congratulations Jeffrey! you really did a great job for a newbie. Thanks for sending me a lot of photos of the assembly process. I use some of them in the assebmly instructions.
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Old 2nd December 2011, 12:11 AM   #9
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Hi, Whiting

My speaker is fostex 125 full range, sounds pretty good. 220V version works perfect for me, transformer is warm but not very hot. Slight high temperature has benefit for the performance.
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Old 8th January 2012, 03:39 AM   #10
bbowes1 is offline bbowes1  United States
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Join Date: Jan 2011
Hi Jeffrey,

Is that a volume control on the front of the amplifier? how are the instructions for this kit? Are the instructions and diagram on this thread all that is included with this amp? I've never done a project like this before. I would definitely need a little more detail.
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