Discrete Dynamics Amplifier:
- Thread starter hydrovac
- Start date
Thanks Shobit, the signal wiring is RG-174/U coaxial cable… It's extremely thin and flexible.
For speakers i used 2.5 sq mm finolex wires.
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flat_listener
Active Member
Neat and tidy power amp build... hope it sounds as good.
waiting for listening impressions.
BTW whats the total cost of the project?
waiting for listening impressions.
BTW whats the total cost of the project?
Thanks, i am still waiting for Aniket's inputs... will check and update about costing.
Thanks, pardon me for irrelevant images, if any.
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superb build
Thanks vdevgon,
My LM3875 has got a new face plate... got it along with this chassis from Beginner_N.
DIY LM3875 amp build.
Hi, posting some pictures of LM3875 Gain-clone amp build. One of my earlier projects. IMG_4342 by hydrovac, on Flickr IMG_4430 by hydrovac, on Flickr IMG_4429 by hydrovac, on Flickr IMG_4428 by hydrovac, on Flickr IMG_4319 by hydrovac, on Flickr IMG_4321 by hydrovac, on Flickr...
www.hifivision.com
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M
mpw
Guest
I wish it had a nice etching on the face plate
M
mpw
Guest
Maybe something like this
)
)
M
mpw
Guest
Hi hydrovac
That's a gunslinger moustache
)
I have no idea on the tech details though..
Regarding the etching..maybe some other design is more etch friendly and maybe it can be done after project completion..and testing
Regards
That's a gunslinger moustache
)I have no idea on the tech details though..
Regarding the etching..maybe some other design is more etch friendly and maybe it can be done after project completion..and testing
Regards
Hi hydrovac
That's a gunslinger moustache
I have no idea on the tech details though..
Regarding the etching..maybe some other design is more etch friendly and maybe it can be done after project completion..and testing
Regards
Aha!
Abhinandan Varthaman's Gunslinger:
can be downloaded in Vector, SVG and PNG
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Finally, got the instructions from Aniket on powering up the amp and setting bias... kind of busy with his younger brother's pre wedding celebration, hence the delay.
As the module is fully tested, he told me to skip the series bulb test... i have to just check the DC on speaker out and set bias with input short, after half hour of switching it on.
On powering up the LEDs glow red for 3 odd seconds and turns green after the relay kicks in... the DC on spkr terminals is 2 mv on left and 5 mv on right... so far so good.
input short... it was too late to leave it on for stabilization and set bias.
so, end of activity for today.
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keith_correa
Well-Known Member
blackscorpio
Active Member
The amplifier that this etched in must be having serious POWER..
Yes For laser etching Vector format are preferred. They are scalable without loosing resolution of your artwork. That means no crocked edges etc. Formats are PDF, SVG, Corel, and probably Autocad too. Even if Modern laser machines may use raster images like bitmaps finish of them will not be good and it will take time. and I think laser etching process cost is time based.
Regards
Powered the amp for an hour and tried setting the bias, couldn't get that fine dialing... immediately pinged Aniket for advice.
He said the amp module was tested on 40-0-40 trafo, and corresponding resistors values were selected... because i am using a 43-0-43 trafo the values are not matching.
Assured that he will re calculate the values by evening, and guide me through changing them... must confess that i was a little disappointed and sheepishly asked him if i can connect and listen to it for few minutes, just to get a feel of SQ.
I got a go ahead and here i am, after two hours... forced myself out of the listening chair to write this... more to come after i make the necessary changes.
Back to my listening post!
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He said the amp module was tested on 40-0-40 trafo, and corresponding resistors values were selected... because i am using a 43-0-43 trafo the values are not matching.
Assured that he will re calculate the values by evening, and guide me through changing them... must confess that i was a little disappointed and sheepishly asked him if i can connect and listen to it for few minutes, just to get a feel of SQ.
I got a go ahead and here i am, after two hours... forced myself out of the listening chair to write this... more to come after i make the necessary changes.
Back to my listening post!
...
Last edited:
Today, i got info from Aniket on what resistors to change.
Had to disassemble the amp to replace them.
Nicely marked on the image... four resistors on bias side:
12 resistors on output devices: will carry on the job tomorrow.
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Had to disassemble the amp to replace them.
Nicely marked on the image... four resistors on bias side:
12 resistors on output devices: will carry on the job tomorrow.
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Purchase the Audiolab 6000A Integrated Amplifier at a special offer price.
