Our first design tube amp: SA-22 SE (EL34) - diyAudio
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Old 13th March 2012, 02:53 PM   #1
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Default Our first design tube amp: SA-22 SE (EL34)

Product Page: SA-22 Single Ended HiFi Tube Amplifier

Have been selling tube amps and kits from other suppliers for about 1 year, now we proudly announce the first own design: SA-22 SE hifi tube amplifier. As some of you suggested before, we grouped an amplifier designer team. The leader is Zhang sifu, a 53 year old guru of tube gears. He has 26 years experience of tube amplifier and transformer design.

SA-22 use 6J8P as preamplifier and EL34 as power stage. It's nothing related to EL34 kit selling in our store. SA-22 has new design, all hifi components, and most important of all a pair of good transformers which were also manufactured by us.

We prepared several options for this amp. You can upgrade the transformers to our best Optimus series. Transformer enclosures and 24 positions stepper potentiometer is also available as option.

RA-22 is now available in our store, price is only $282, charges only $50 for worldwide air+ground shipping, no need to wait for 3 months any more:-)

Photos of SA-22
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Old 14th March 2012, 10:32 PM   #2
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In order to thanks to the support of the diyaudio members, now this new product is world wide free shipping for you! Please send PM or email to sales@siliconray.com for this offer
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Old 14th March 2012, 10:38 PM   #3
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Mike, that looks real nice.
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Old 14th March 2012, 11:02 PM   #4
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Hi Malibujeff, the sound is even nicer with the Optimus series transformer. We'll begin to sell those transformers very soon.
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Old 19th March 2012, 03:54 AM   #5
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Inside view as some of you reqired
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Old 21st March 2012, 09:27 PM   #6
tomlang is offline tomlang  United States
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What is output transformer impedance?

Do you have schematic to post?

What is difference in output transformer choices?

Thanks!
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Old 22nd March 2012, 01:34 AM   #7
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Nothing special for the schematic.
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The impedance of OPT is 3.5K. The transformer make huge difference. Standard option use Starfire series transformer build with normal M6 siliconray steel, machine wired. Optimus series transformer use high quality New Japanese Steel high silicon steel, 100% manual made, special wiring method makes it has very low inductance leakage and capactiance. It has far better performance at frequency lower than 100Hz and above 10KHz.
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