DIY: Pass F5 turbo v2 initiated

[pdhanwada]

Aluminium heatsink, Heat sink in bangalore, Heatsink stockist, Heatsink dealer, Heatsink supplier, Aluminium LED Heatsinks, Aluminium Reflector Sheets, Aluminium Caul board Sheet 2.5mm, Aluminium Plywood sheets, Aluminium Alloy Rods,plates in 2014, 7

How about N77 from this page. Does the heat transfer of this heat sink suffice our requirement.

Remember we have vertical fins. That will have better convection air flow around the fins.

I will be again using 7.5 in height four pieces.

Let me know your opinion.

THanks
Pandu

 

[quad]

I will be again using 7.5 in height four pieces.

Let me know your opinion.

THanks
Pandu

Pandu, there a lot of heatsink profiles available with the Aluminium shops
at RP Road. There are a bunch of shops on the left side, between
Ghasmandi X Roads, and the bridge. It comes in long lengths, but I think they will
cut it, or have smaller pieces. I got some quite cheap for my MyRef amp.
They are not black anodised, but you can get that done quite easily.

 

[pdhanwada]

Quad,

I went around RP road in the month of Feb and mar. F5 needs big heat sinks. The heatsinks which are available in RP road dont match our requirement.

I feel Perfectmetal.in looks like the place for the heatsinks. I agree we need to pay for shipping but I did not find anybody who can supply big heat sinks in hyd.

Thanks
Pandu

 

[anilva]

Quad,

I went around RP road in the month of Feb and mar. F5 needs big heat sinks. The heatsinks which are available in RP road dont match our requirement.

I feel Perfectmetal.in looks like the place for the heatsinks. I agree we need to pay for shipping but I did not find anybody who can supply big heat sinks in hyd.

Thanks
Pandu

Check for Hindalco dealers. They will have. Also look at their catalog on the web.

Regards

 

[pdhanwada]

Anilva,

Thanks for the pointer. I checked with Hindalco dealers. Most of them are not stocking the ones we need.

Have you bought any from Hindalco. If so which one(model #) did you use.

I was looking for the ones with Fins exceeeding 60 mm.

Thanks
Pandu

 

[pdhanwada]

om,

Can you post the co ordinates of the Mosfets on the PCB. I know you told me on the Phone but I misplaced them.



THnaks
Pandu

 

[omishra]

Can you post the co ordinates of the Mosfets on the PCB. I know you told me on the Phone but I misplaced them.

Sure!
These are 4 MOSFETs from left to right All distance are in inches measured from left point to MOSFET middle pin. Please calculate the differetial

L(0)<- 2.15" ->M1- 4.55" ->M2- 6.90" ->M3- 9.30" ->M4- 11.5" ->R

 

[sachu888]

PCB update

Hi all,
PCBs have been dispatched from the factory.I should receive them in 2-3 days.Tonight,I will post amount required(approx) for Mosfets and other parts.I will need the balance amount in 2-3 days.

Regards,
Sachin

 

[sachu888]

1st PCB received

Received 10 kg box full of Power Supply filter boards for F5 TV2 today .They are big,heavy and thick.I am posting few images here:

Regards,
Sachin

 

[pdhanwada]

Hi Friends,

From a long time, it was in mind to have nice class A amplifier. Pass Amplifiers don't need my introduction. It's well known to DIY circles. I am churning out all available material on forums.

As subject states I am referring this - http://www.firstwatt.com/pdf/art_f5_turbo.pdf

I went ahead buying PCB for my build. But unfortunately I find some issues as PCB tracks are thin as well as they are 305mm long, 5mm more than my heat sink. So I designed with following thought in mind.

1. For power and output it is both sides will be overlapping. size will be approx 295mmX42mm (subject to change)
2. All heat producing devices are equally distributed at one edge.
3. using thick copper with wider tracks on both side.
4. Avoid in-out crossing to avoid oscillation, mind this is wide band amplifier.

These are my layout with two proposals -
Proposal 1: This will have input at center and will be same layout used for left and right channel.

By boundry at 2012-08-17

Proposal 2: This will have input at once end and left - right will have different symmetric PCB.

By boundry at 2012-08-17
Let's discuss pro's and con's of these two approaches. Further story will unfold as this project make progress.

Thanks,

Very good progress so far. Finalized on the heat sinks. Need to work on the cabinets.

Thanks for the effort.
Pandu

 

[captrajesh]

Waiting for the kits anxiously.

 

[magma]

i have a length of N34 heatsinks left over from a batch
Aluminium heatsink, Heat sink in bangalore, Heatsink stockist, Heatsink dealer, Heatsink supplier, Aluminium LED Heatsinks, Aluminium Reflector Sheets, Aluminium Caul board Sheet 2.5mm, Aluminium Plywood sheets, Aluminium Alloy Rods,plates in 2014, 7


however i have procured them
for a bit more

if anyone is interested let me know

 

[sachu888]

Hi all,
I am posting BOM for F5 V2(stereo)
MOSFETS FQA12P20 + FQA19N20 from buzzforb
=====================
(Qty 2 matched pairs for 2XF5t boards) each pair 1 X FQA12P20 + 1 X FQA19N20


JFets (Matched Pairs from spencers):
====================================
(Qty 2 pairs, for 2XF5t boards) [2sk170BL/J74BL match pair HK$55/pair (about US$7) + shipping]. Store | FET Audio

Diodes Vishay:
================
(Qty 8, for 2XF5t boards) MUR3020WTPBF price Rs 139 ea+ taxes and shipping
(Qty 16, for 1X Rectifer Brd) MUR3020WTPBF Rs139 ea+ taxes and shipping


Caps:
=====

(Qty 4, for 2XF5t boards) 10F/50V Electrolytic Panasonic
(Qty 48, for 1X Rectifer Brd) 0.1F/63V box type yellow, procure locally
(Qty 16, for 2XFilter boards) 10000F/63V Electrolytic Nippon Chemicon procure locally
(Qty 4, for 2XFilter boards) 1F/250V Panasonic Polypropylene(PP) Caps

Resistors:
=========
(Qty 16, for 2XF5t boards) 1R, 3W 1% MFR
(Qty 8, for 2XF5t boards) 220R, 3W 5% MFR
(Qty 4, for 2XF5t boards) 10R, 0.5W 1% MFR
(Qty 6, for 2XF5t boards) 1K,0.5W .1% MFR
(Qty 8, for 2XF5t boards) 47.5R,0.5W 1% MFR
(Qty 4, for 2XF5t boards) 2.21K, 0.5W 1% MFR
(Qty 2, for 2XF5t boards) 47.5K, 0.25W MFR

(Qty 4, for 2XF5t boards) 5K trimmer local purchase
(Qty 2, for 2XF5t boards) 200R trimmer local purchase
(Qty 4, for 2XF5t boards) 4.7K NTC Local purchase

(Qty 4, for 2XFilter boards) 2.2K 3W 5%
(Qty 16, for 2XFilter boards) 0.22R 2W 5% Wire Wound

Misc:
=====
(Qty 2, for 2XFilter boards) 200V, 35A Bridge rectifier for ground lifting
(Qty 4, for 2XToroidal Transformer, Ground lifting) CL60 NTC anufacture part No: CL-60 local purchase

All the above parts are carefully chosen after a long discussion with Omishra and took about one month to finalise on the BOM. We have selected all imported stuff like Vishay,Panasonic,TE connectivity,except few locally procured parts as they are not critical.
Total price comes to Rs8500(approx).It doesn't include 2X 300Va transformer(Rs1500 each,approx),16X10000uf(Rs 100 each,approx Nippon Chemicon) power supply caps,and Fairchild Mosfets(needs to confirm price from Buzzbob from Diy audio)
I need to order parts in 2-3 day,so please transfer your share.I am looking for suggestion.

Regards,
Sachin

Regards,
Sachin

 

[omishra]

Thanks Sachin. It seems those 24 X MUR diodes and JFets taking all finance almost 5000 RS.
Any other alternative?

 

[sachu888]

Thanks Sachin. It seems those 24 X MUR diodes and JFets taking all finance almost 5000 RS.
Any other alternative?

Yes Om,
that Vishay Diodes are having half of kit cost.Same diode of ON Semiconductor cost Rs 175/piece.2 matched pair of Toshiba Jfets costing Rs 900 including shipping.

Regards,
Sachin

 

[pdhanwada]

I think I am fine. because it includes Electrolytic caps for the power supply boards, resistors on the Power supply and pcbs.

Will do the transfer tommorrow.

Thanks
Pandu

 

[pdhanwada]

I didnt read teh post completely.

It seems caps and mosfets are not included in the price.

Let us know.

Thanks

 

[sachu888]

I didnt read teh post completely.

It seems caps and mosfets are not included in the price.

Let us know.

Thanks

16X10000uf caps are not included. Buzzforb has not confirmed Mosfet price,Om has sent a Pm to him.He sells Diodes @1.5$/piece.I am avoiding that for weight as shipping and custom would be more.
We have discussed all prices here http://www.hifivision.com/diy/28245-diy-pass-f5-turbo-v2-initiated-10.html

Regards,
Sachin

 

[pdhanwada]

sachu88,

There are so many parts to get, it is likely to exceed this budget too if procured individually. So I think we are fine here

Thanks for the great effort.

Thanks

 

[sachu888]

sachu88,

There are so many parts to get, it is likely to exceed this budget too if procured individually. So I think we are fine here

Thanks for the great effort.

Thanks

Thanks Pandu,
we have tried our best to keep the cost as low as possible without compromising in quality.We kept a close watch over DIY audio GB and almost succeeded to match their prices.Tea Bag F5T boards costs $30+(+$17 shipping) Power supply boards another $20(one board)+$17shipping and customs(if any),no rectifier board.Our price of full set of PCB is Rs 3000(total 5 boards).Total no of participants are far more there as compared to us.

Regards,
Sachin