Pair of fully populated USSA 5 25w Class A board

[stretchneck]

Assembled by Fab, the designer.

Mosfets 2SJ313/K2013
output Mosfets ALF16P16W/16N16W
Everything is matched.

£300 the pair + P&P. If I can find them I'll also throw in a new pair of 24v SMPS that can be used to testing.

Specifications of USSA-5 (obtained on 1 channel) (updated 2019-11-24)
 Gain: 20dB (or x10)
 Input sensitivity: 1.8 V-peak for output (20W rms)
 Damping Factor (100 Hz , 8 Ohms): [35 – 45]
 Output impedance: about 0.2 Ohm
 Input Impedance: 22K Ohms
 Max power into 8 Ohms before clipping: <25Wrms (at Supply voltage of +/-24Vdc, 1.2A Bias current)
 Power in Class A (8 Ohms): depending of bias current
 DC offset: trimmable to < 3mV
 Rise time (10 to 90%) < 1.3us

 

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More photos attached

 

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Still available

 

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Bump still available

 

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Bump

 

[stretchneck]

Bump - offers anyone?

 

[stretchneck]

Offers?

 

[e_fortier]

Hi

Maybe provide a BOM to show how it’s worth.

I’m not sure but £300 ($400 usd) might be too high for 2 populated PCBs.

From the reviews I’ve read this is an amazing sounding amp.

Good luck with your sale

Eric

 

[stretchneck]

£300 is what I paid for them as they were pre-populated. Anyhow, open to offers and I’m including 2x 24v SMPS power supplies with them that can be used initially.

 

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Open to offers still! I will let these go for a good price is someone contacts me…

 

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Can also throw in some panel mount RCA inputs for free, and I also have some brand new Jensen input transformers as well that I would sell alongside at a good price. A good way to have XLR input to a single ended amplifier.

 

[stretchneck]

Everything still available - make me an offer.

 

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Sold