babbudi85
New Member
great Build looking forward to it.
300 watt Hi-fi power amp project.
- Thread starter hydrovac
- Start date
great Build looking forward to it.
Danieljohn
Active Member
Last edited:
Just to update that I got the PCB made in double layered, with provision to mount the power transistors on board.
This will eliminate the hassle of hard wiring the trannies and make it less prone to joint failures which i was experiencing in earlier builds.
Top side:
Bottom side:
These are the earlier version PCBs:
...
This will eliminate the hassle of hard wiring the trannies and make it less prone to joint failures which i was experiencing in earlier builds.
Top side:
Bottom side:
These are the earlier version PCBs:
...
Attachments
I got a nice enclosure for my PWA300 amp. This is from Soundfoundations.
I used DIY enclosures in my earlier builds and was not really happy as they never did justice to the amps.
I am quite surprised at the quality of the chassis, simply amazing and top class. It looks stunning with decent fit and finish, actually better than the images posted by Ali.
Now with the V2, the new enclosure will surely complement the build.
Bomb proof packing:
With feet, IEC socket, power switch and screws for mounting:
Huge real estate inside:
...
I used DIY enclosures in my earlier builds and was not really happy as they never did justice to the amps.
I am quite surprised at the quality of the chassis, simply amazing and top class. It looks stunning with decent fit and finish, actually better than the images posted by Ali.
Now with the V2, the new enclosure will surely complement the build.
Bomb proof packing:
With feet, IEC socket, power switch and screws for mounting:
Huge real estate inside:
...
flat_listener
Active Member
Suman Dachepalli
New Member
There is also a label included in the hardware...
Suman, first i neeed to build the dual layer PCBs for evaluation and then order for more boards... BTW i have couple of earlier version PCBs if you are interested.
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Suman Dachepalli
New Member
Thank you, I will wait for the dual layer PCB's as it saves lot of efforts.
I got a nice pre amplifier enclosure to pair with the amp chassis... a silver and black combo.
I am mighty pleased with the fit and finish... top notch!
The empty enclosure weight... 4.25 Kg
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I am mighty pleased with the fit and finish... top notch!
The empty enclosure weight... 4.25 Kg
...
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SRI 420
Active Member
Wooooow, amazing build and a beautiful cabinet.
The PCB work was on hold for a while, as i was waiting for some components. Recd them today.
Made a simple Transistor hFE test jig based on this circuit for matching pairs. Currently measuring NPN transistors (BD139 and BC547)... need to build the other half for PNP though. Will resume populating the boards once i measure all the transistors.
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Made a simple Transistor hFE test jig based on this circuit for matching pairs. Currently measuring NPN transistors (BD139 and BC547)... need to build the other half for PNP though. Will resume populating the boards once i measure all the transistors.
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SIDEWINDER18X
Well-Known Member
Nice to see after all these years ...Nice to see a high power amp project on the forum.
Wow, i love those metal can trannies..........
Back in the 90's I used the SANWA transistor tester meter ST80 to measure hfe and test bjt's and power mosfets.
In the 90's Elektor published the 300W power Amplifier. Very similar to this . Here is the link to that .... https://alectronicx.blogspot.com/2014/12/300-watt-power-amplifier-elektor-111995.html?m=1
Attachments
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flat_listener
Active Member
The amp module is looking compact and classy...
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