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USSA-5 PCB GB
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Old 24th November 2019, 03:04 AM   #351
arthur is offline arthur
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USSA-5 PCB GB
Hi Fab,
Are the 5 and 5.1 use the same pcb?
I would like to have some
Thanks
Arthur
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Old 24th November 2019, 03:11 AM   #352
gary s is offline gary s  Australia
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Arthur, I asked the same question previously and Fab replied yes.

Fab, PayPal is showing at the moment as the payment I made to your account as "Pending" for some reason, so it might take a day or so to show up in your PayPal account, thanks.

regards,

Gary..
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Old 24th November 2019, 04:40 AM   #353
arthur is offline arthur
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Hi Gary, thanks for clarification
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Old 24th November 2019, 12:06 PM   #354
meanie is offline meanie  Singapore
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Hi Fab,

Did a quick check on Mouser on the Q5,6 (2SB1259, 2SD2081), which turns out not available. Are these pair your final parts for USSA5.1?
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Old 24th November 2019, 12:26 PM   #355
tomtest is offline tomtest  Germany
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Hi Meanie,

I have had a quick look at Digikey, they have both in stock. Hope that helps.

By the way have you made a comparison between the SLB power supply and another maybe the one from Project16 / Prasi?
I have get my SLB PCB yesterday.

Kind regards
André



Quote:
Originally Posted by meanie View Post
Hi Fab,

Did a quick check on Mouser on the Q5,6 (2SB1259, 2SD2081), which turns out not available. Are these pair your final parts for USSA5.1?
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Old 24th November 2019, 12:38 PM   #356
hallcon83 is offline hallcon83  United States
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USSA-5 PCB GB
Hi Fab, I have what may be a strange question - I have been searching for my dream amplifier.... and I am hopeful this is it. I am running 110db horn speakers, Can I bias this amplifier for 2-3 watts of Class A , I know there are other small Class-A amplifiers.... but after reading all the reviews this looks like this might be The Amplifier I've been searching for so long. -- Thank you,
Dean
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Old 24th November 2019, 02:37 PM   #357
fab is offline fab  Canada
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USSA-5 PCB GB
Quote:
Originally Posted by gary s View Post
Hi Fab,

Payment sent and PM also sent.

How are you going with the full updated manual, any hints as to when you will be emailing that out to GB members who qualify for it, and will it address the 3 different schematic options you have shown above, or only the 2 with lateral outputs, thanks again?

Regards,

Gary..
Hi Gary
The manual can be used as-is for the USSA5 (I mean the full manual version) since we all know that the output mosfet are Exicon instead of Alfet.

I will update the manual for version 5.1 most probably by adding an addendum during next week. For version 5B it will be later since I prioritize to test this version in a sound system.

Fab
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Old 24th November 2019, 02:45 PM   #358
fab is offline fab  Canada
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Quote:
Originally Posted by arthur View Post
Hi Gary, thanks for clarification
Hi Arthur
I suppose you have completed your USSA5 build using the pcbs you received last year. Can you show pictures or feedback on the forum.

Fab
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Old 24th November 2019, 03:06 PM   #359
arthur is offline arthur
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Fab, you have good memories
I just gathered 4 pairs of driver Mosfets and 8 pairs of the output Mosfets .
As the latest 5.1 can use Darlington transistors to drive the output Mosfets, I will try assembly them in the Christmas Holiday.
Then I will compare the sound quality with my newly bought Firstwatt Sit-3
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Old 24th November 2019, 03:08 PM   #360
fab is offline fab  Canada
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Hi Hallcon83

I suppose the USSA5 could be scaled down in power but I have to analyse it furthermore for possible sound impact.... I suppose you could live with more than 3W so 10W or so?

Fab
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