Hey All-
I've been on the hunt for a low power, low voltage-gain amp for my Radian 951pb/be on SEOS 24's (DSP active) for quite a while now. What I need is something around unity gain. I stumbled across these on ebay/aliexpress, which I'd guess is sacrilege around here...
A couple quick questions, what is the voltage gain of these guys? Would they be suitable/reliable for running long days in a recording studio (we have A/C and ventilation)? The Radian/SEOS 24's are running from ~750hz to 20k. Would it be a problem if I still needed to pad down the input? In front of a 'normal' amp, I need to pad around 30dB (IE crown D45, Parasound, UCD180).
Also is buying something like this from aliexpress a terrible idea? This is beyond my DIY skills. I have a family friend that could probably help me with them, but it might be some years before I could actually use them!
Thanks
I've been on the hunt for a low power, low voltage-gain amp for my Radian 951pb/be on SEOS 24's (DSP active) for quite a while now. What I need is something around unity gain. I stumbled across these on ebay/aliexpress, which I'd guess is sacrilege around here...
A couple quick questions, what is the voltage gain of these guys? Would they be suitable/reliable for running long days in a recording studio (we have A/C and ventilation)? The Radian/SEOS 24's are running from ~750hz to 20k. Would it be a problem if I still needed to pad down the input? In front of a 'normal' amp, I need to pad around 30dB (IE crown D45, Parasound, UCD180).
Also is buying something like this from aliexpress a terrible idea? This is beyond my DIY skills. I have a family friend that could probably help me with them, but it might be some years before I could actually use them!
Thanks
If you're looking for unity gain, I suggest the F4 or the Mofo.
The mofo in particular is really easy to build. It uses very few parts, all inexpensive
and readily available, and can run off laptop power supplies.
Here's the main thread on the mofo:
Build This MoFo!
The mofo in particular is really easy to build. It uses very few parts, all inexpensive
and readily available, and can run off laptop power supplies.
Here's the main thread on the mofo:
Build This MoFo!
Hello. I bought this board on aliexpress (Final Dual PASS AM Amplificador/10 W pequena A/Desequilibrado Entrada W/Entrada Balanceada|amplifier a|amplifier 10wamplifier small - AliExpress) and would like to know if anyone has any construction tips. My transformer has 13v + 13v and output of 18v + 18v (20A). This board has all fixed value resistors.
This scheme is the same as the card I bought on aliexpress!
This scheme is the same as the card I bought on aliexpress!
This scheme is the same as the card I bought on aliexpress!
You should be fine to use that Transformer, the aleph M amplifiers can run up to 30V rails ( depending on heatsink & installed caps )
Thanks.
Soon I will post some things I discovered here. I believe that the emitter resistors have a very low value compared to the original values of the project. I already bought more ceramic resistors to replace and I will post the differences.
🙂
Soon I will post some things I discovered here. I believe that the emitter resistors have a very low value compared to the original values of the project. I already bought more ceramic resistors to replace and I will post the differences.
🙂
Both the Blue and Black Mini-A boards sold through group buys were excellent. Glad I was able to scare-up a couple of sets.
Do you need more ? I know the person who used to sell them and he has lots more. Although they are now nice and purple..
Yes jamesvhf, I would like to get hold of some if possible, send me a pm with the details. thanks.
Regards,
Gary..
Regards,
Gary..
I assembled a set but wasn't sure on the test procedures so I never put them in an enclosure.
Looks like I may have to revisit the project and start reading the thread again from the beginning...
Looks like I may have to revisit the project and start reading the thread again from the beginning...
Long shot but need to ask.
Does someone still have boards for this mini aleph ?
Preferably in the UK or EU.
Thanks
Does someone still have boards for this mini aleph ?
Preferably in the UK or EU.
Thanks
If now one closer to the UK (or UK) comes forward I may take then of you hands depending...
Are they smd ones ?
And a want 2 for a 2 channel amp.
Are they smd ones ?
And a want 2 for a 2 channel amp.
These are the original BrianGT boards, no surface mount......they have snap off wings that are not used to make the basic 8W amp or you can add more output devices for higher power with the "wings".
It looks like postage for a padded envelope to UK is about $15
It looks like postage for a padded envelope to UK is about $15
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Just the one ?
Schematic for it ? I think there was a small discrepancy on the component numbering from the original schematic or am I wrong ?
Schematic for it ? I think there was a small discrepancy on the component numbering from the original schematic or am I wrong ?
Yes I have this extra board.....built a mini-A years ago and it's still going strong.
As far as the documentation goes...I can't remember ......it's been about a decade.
There should be lots of info on this thread and the build is pretty straightforward.
I also have some transformers that work well for this......but shipping is likely a deal-breaker.....they won't fit in a padded envelope.
As far as the documentation goes...I can't remember ......it's been about a decade.
There should be lots of info on this thread and the build is pretty straightforward.
I also have some transformers that work well for this......but shipping is likely a deal-breaker.....they won't fit in a padded envelope.
To Carsten, don't understand if you are offering but I don't want the board for SMD components sorry.
To boywonder that's why I asked I read the complete thread from post 1 and there where some people mentioning that exact issue of the different components numbers.
But again I will only buy if there are 2 separated boards I don't have use for just one channel.
I have all the components for the buy bar the boards hence the question but thanks for the offer.
To boywonder that's why I asked I read the complete thread from post 1 and there where some people mentioning that exact issue of the different components numbers.
But again I will only buy if there are 2 separated boards I don't have use for just one channel.
I have all the components for the buy bar the boards hence the question but thanks for the offer.