My OLD Project....... cheap tube audio project!!! - diyAudio
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Old 8th May 2008, 07:52 PM   #1
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Join Date: Jul 2004
Location: Hong Kong
Default My OLD Project....... cheap tube audio project!!!

My OLD Project....... cheap tube audio project!!!

Since I was sick for several months & admitted in hospital.

But............. before I sick, I did several projects already.

holding on hands without funish....... Now I continous it already.

Before I did this project I was considerate how can use limited money for one quailty tube amp? More diyers can afford!

middle range power output, reasonable price, good sound. flexable or said multi-brands of tubes in market for user to exchage.

Light weight, small size, good outlook...... & finally was cheap price.

after my consideration, I did this alrady.

pls see the out look of the chassis.

compare the Nokia phone & chassis size!

Two potted was 0.23mm thickness Z11 silicon laminations 20W PP OPT!

thx

thomas
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Old 8th May 2008, 08:13 PM   #2
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Join Date: Jul 2004
Location: Hong Kong
OK,

Although this is a cheap tube amp( Combine pre amp & power amp)

But, Volume Control was very important for it.

Cheap volume control will cause the input data loss too much & effect the sound stage.

A good shielding also importnat for the volume control.

After it, I call factory use PCB with tantalum resistors produce a cheap but high accurancy, low COST & price was most user or diyers can afford! If........ can use it for the standard arts for cheap tube amp will be the best!

take a look for the volume control which use 0.5% SMD tantalum resistors.

thx

thomas
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Old 8th May 2008, 08:20 PM   #3
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after funished the volume control, I test it accurancy.

looks was quite good!
100K was test in 100.6K only in two channel.

thx

thomas
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Old 8th May 2008, 08:22 PM   #4
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Finally was the shielding of the Volume control.

I order factory raw solid copper shielding & will provide a full shielding & enclose for the SMD Tantalum resistors volumn control.

thx

thomas
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Old 8th May 2008, 09:26 PM   #5
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looks very cool. got a schematic?
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