planning to build car sub amp, help needed - Page 14 - Team-BHP

omishra · 31st July 2007, 17:02

I am not sure, how to edit the old link. But below link works in my both computers.
41Hz Audio Forum

Regards

DerAlte · 1st August 2007, 10:45

Enh!? Sure, the link works, and the photos are visible.

Superb work, Mishra-ji! The amp looks neat and well finished.

* Where did you get the front baffle for the speaker boxes? Seems to have 2 ports! What are the drivers that you have put in?
* Or, did you buy these boxes readymade?
* Where did you get the input select switch from?

omishra · 3rd August 2007, 11:16

Quote:

Originally Posted by DerAlte

Superb work, Mishra-ji! The amp looks neat and well finished.

Thanks DerAlte, That I wanted perfect 99% silent without input with full volume. Now it cleaned more.

Quote:

Originally Posted by DerAlte

* Where did you get the front baffle for the speaker boxes? Seems to have 2 ports! What are the drivers that you have put in?
* Or, did you buy these boxes readymade?

Yes These baffles I bought at SP road, Bangalore (now I dont remeber the shop name but if you enter from OM Ele. then it was right side inside lane opp. to chopda ele ) Rs 250/each.
I calulated the port volume /area and resonance frequecy was decided 60Hz. (I wanted to avoid any 50Hz hum and below that I cant hear). Box volume calculated and odd dimensions were given to that guy to make boxes.(8.5"WX13.5"HX11"D) to avoid internal reflection and waves cancelling/resonating. MDF ply thick ness is 1". costed 350Rs for pair.

Regarding dual port it does not matter number of ports (total volume V=V1+V2)

Inside surface is coated with dual foam tape as Damping material. Over that I pasted all side using buble sheet (packing material) , exposing bubbles to internal air, so damping is good and cleaner/hygenic than fibre glass wool.

Quote:

Originally Posted by DerAlte

* Where did you get the input select switch from?

This switch is available anywhere on SP road. I bought in Marudhar Ele. Ulsoor, end of CMH road. There are two qualities, I selected the one with chrome plated connectors and phenolic PCB (can be seen from connector side) Rs 80.

Drivers I am using normal Bolten one (200Watts), but planning to replace soon with Luxco which I have in my hometown. It has 2" diameter voice coil. and 2.5kg Magnet for 8" driver.

Cheers,

Vivekphadnis · 5th August 2007, 00:05

The amp looks neat. Good idea to build the power switch knob from a latch.

aah78 · 5th August 2007, 01:34

Quote:

Originally Posted by omishra

Hi clip, you can check at this site -: MIRACLE :- and look for the required transformer. Its located in Bangalore. I bought 2 X (22-0-22, 160 VA), toroids from them. It cost Rs 1100 + courier charges. Quality is also good and voltage is very accurate. Your requirement can be matched somewhere in there product list. Good luck!

For toroidal transfomers also try this company -> Radio Electric Pvt. Ltd. located in Mumbai. The current company I'm consulting for imports their transformers to the U.S. - we use them in 400/500W power supplies.
Another website for the same -> SeekandSource.com - Radio Electric Pvt. Ltd..

Vivekphadnis · 12th August 2007, 15:23

Will this company ship one transformer to me in Bangalore?

clipto333 · 15th August 2007, 18:18

hi guys,

finally, i bought an lcr meter. got it for 2k. the brand is lutron. dont know if it is a known brand though.

now i need a true rms meter and an osci. the target is to buy it next month.

and im going to delhi on the 24th. can anyone suggest a good electronics store? it would be of great help guys.

i more thing. im trying to diy an LC meter. i got most of the components but the problem iam facing is that precision caps(1% or less tolerance. lesser the better) are not available here and i dont know what type of caps are the precision caps. can anyone help me out with these caps?

please post a pic of a low tolerance cap if anyone can.

cheer
clip

ScarySkulls · 15th August 2007, 21:40

Rishab, I have tried looking around A LOT.
Couldnt find much of the stuff. Only low grade chinese, If at all.

My friend tells me there is one last store left.
Will see that too before my final answer.

aah78 · 15th August 2007, 22:44

Quote:

Originally Posted by Vivekphadnis

Will this company ship one transformer to me in Bangalore?

I'm not sure but if it's among their product-lines, I don't see why not - no harm in trying.

clipto333 · 17th August 2007, 16:25

Quote:

Originally Posted by ScarySkulls

Rishab, I have tried looking around A LOT.
Couldnt find much of the stuff. Only low grade chinese, If at all.

My friend tells me there is one last store left.
Will see that too before my final answer.

hi,

thanks for looking around ss. i really appreciate your help.

this is the problem. no one keeps good electronic stuff. this is the only reason why i dont like india (assuming this is the case everywhere). india is not a DIY friendly place.

maybe delhi has the stuff im looking for. ill be going there on the 24th but i still dont know any place and store.

cheers
clip

1st August 2007, 10:45	#197 (permalink)
DerAlte Team-BHP Moderator Join Date: Mar 2007 Location: Bangalore Posts: 1,623	Enh!? Sure, the link works, and the photos are visible. Superb work, Mishra-ji! The amp looks neat and well finished. * Where did you get the front baffle for the speaker boxes? Seems to have 2 ports! What are the drivers that you have put in? * Or, did you buy these boxes readymade? * Where did you get the input select switch from? __________________ Never believe it cannot be done - it's only that you haven't found out how!!!

5th August 2007, 00:05	#199 (permalink)
Vivekphadnis BHPian Join Date: Jun 2005 Location: Bangalore Posts: 673	The amp looks neat. Good idea to build the power switch knob from a latch. __________________ Thank God for DIY audio.

12th August 2007, 15:23	#201 (permalink)
Vivekphadnis BHPian Join Date: Jun 2005 Location: Bangalore Posts: 673	Will this company ship one transformer to me in Bangalore? __________________ Thank God for DIY audio.

15th August 2007, 21:40	#203 (permalink)
ScarySkulls BHPian Join Date: Mar 2004 Location: Ludhiana Posts: 565	Rishab, I have tried looking around A LOT. Couldnt find much of the stuff. Only low grade chinese, If at all. My friend tells me there is one last store left. Will see that too before my final answer. __________________ Punjabi for Life.

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31st July 2007, 17:02	#196 (permalink)
omishra BHPian Join Date: Jun 2007 Location: Pune Posts: 135	I am not sure, how to edit the old link. But below link works in my both computers. 41Hz Audio Forum Regards

15th August 2007, 18:18	#202 (permalink)
clipto333 BHPian Join Date: Dec 2006 Location: jalandhar Posts: 910 View My Garage	hi guys, finally, i bought an lcr meter. got it for 2k. the brand is lutron. dont know if it is a known brand though. now i need a true rms meter and an osci. the target is to buy it next month. and im going to delhi on the 24th. can anyone suggest a good electronics store? it would be of great help guys. i more thing. im trying to diy an LC meter. i got most of the components but the problem iam facing is that precision caps(1% or less tolerance. lesser the better) are not available here and i dont know what type of caps are the precision caps. can anyone help me out with these caps? please post a pic of a low tolerance cap if anyone can. cheer clip