DIY: Pass F5 turbo v2 initiated

[pdhanwada]

Om,

Is there any other place on the PCBS where in similar problem could occur. Please check.

I am not sure.

Thanks
Pandu

 

[omishra]

Om,
Is there any other place on the PCBS where in similar problem could occur. Please check.

I am not sure.

Hi feel only PS boards have this problem, Amp boards seems fine to me. Still I will verify in evening and update.

 

[vktarun]

Omishra,

Solution provided by you in post no 259 seems to be ok.

Regards,

Vipin.

 

[omishra]

Omishra,

Solution provided by you in post no 259 seems to be ok.

Regards,

Vipin.

Yes buddy. But it seems you haven't seen price involved into it (Rs 6/ connection). If our components do not save us money then it will need some extra contribution.
Let's keep fingers crossed till Sachin finishes element 14 order. Mine investment is done with all imported MOSFETs, Diodes and local purchases are done.

 

[kroyin]

Om .. I was thinking about monoblocks not dual mono.

Do you think that cutting the rectifier board in half would be a bad idea
(I did a test run on a 1.6mm PCB & it cuts properly )

 

[omishra]

Om .. I was thinking about monoblocks not dual mono.

Do you think that cutting the rectifier board in half would be a bad idea
(I did a test run on a 1.6mm PCB & it cuts properly )

Only problem is mounting holes. That PCB has tracks on both the sides which carry high current from transformer, before and after rectification. Mounting bolts, screws can short it to chassis.

 

[kroyin]

Oh that's ok I'll use wood blocks & feviquick on the other end

 

[omishra]

Hi feel only PS boards have this problem, Amp boards seems fine to me. Still I will verify in evening and update.

This is pic for the amp board connector.

 

[omishra]

Oh that's ok I'll use wood blocks & feviquick on the other end

Or drill hole avoiding burr shorting both the layers and use nylon spacers and nut-bolts.

 

[captrajesh]

@Sachin, I had transferred Rs. 8800/- yesterday.

 

[sachu888]

@Sachin, I had transferred Rs. 8800/- yesterday.

Thank you sir,received it.

Regards,
Sachin

 

[pdhanwada]

Om,

Not able to see any of the markings on the pcb boards when enlarged. I am not sure how you created the jpg.

Can you repost the images which have better resolution.

Thanks
Pandu

 

[omishra]

Om,

Not able to see any of the markings on the pcb boards when enlarged. I am not sure how you created the jpg.

Can you repost the images which have better resolution.

Thanks
Pandu

Which images Pandu? The last one is taken near +32v pin on Amp board.

 

[pdhanwada]

I am talking about the PCB board images you pasted in this thread.

Thanks
pandu

 

[sachu888]

I am talking about the PCB board images you pasted in this thread.

Thanks
pandu

He has posted pics of backside of PCbs. Thats why you don't see any marking.

Regards,
Sachin

 

[pdhanwada]

Even the images posted later on the thread in page 5 or 6 also have the same problem. Poor resolution.

Can you guys get better resolution pictures and post it on the thread.

Thanks
pandu

 

[pdhanwada]

My cabinet progress.

4 pieces of 205mm by 150 mm heatsinks
front and back plates 7 mm thick aluminium plates
Anglers on all the edges which will tie the front, back plates, heat sinks, top and bottom plates together.
Anglers are 3.5 mm thick
My fins are 82 mm.
Will attach both the heat sinks using 2 anglers one at the top and other at the bottom.

My inside of the cabinet is 10.5 X 16 in. So kind of conjusted.

As the thickness of the toroid is 50mm and magnetically sheilded can I place the two toroids one over the other.

Will run a 6 inch nut bolt thru the two toroids and fix them to the cabinet.

Will Place a separator of 18mm thick plywood in between. Also will leave about 25 mm space between the toroids

If I can use this arrangement I can work comfortably for the rest of the three boards on the bottom. letme know if this poses any problems.

Will place the amp pcbs on the heat sinks such that they centered depth wise so that heat dissipation happens evenly.

Not planning to do any welding of the heat sinks as I think by placing one pair of mosfets on each heat sink, the distribution of heat should be even.

Also not planning to use any heat spreader as done by buzzforb in DIYaudio.

Thanks
Pandu

 

[sachu888]

Hi,
See this build : https://picasaweb.google.com/engravermartin/BuildingF5PowerAmplifiers
Please have look at his another builds in same album

Regards,
Sachin

 

[pdhanwada]

I did not find any picture having two transformers in a single chasis.

My question Is it ok to mount two transformers one over the other with 25 mm separation. SO that I can save some space in side the cabinet.

Thanks
pandu

 

[kroyin]

I think I saw a pic of transformer piggybacking in show your pass build pictures on diyaudio.

I have my Myref 240va trans sitting below my 50va dac trans (separated by rubber & bolted together) with no ill effect

Or you can always have them stand upright side by side if your chassis height is 150mm