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Old 14th May 2013, 12:07 PM   #401
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Default Hand Made PeeCeeBee

Quote:
Originally Posted by shaan View Post
Beautyful job. Now just increase the thickness of the power and output traces and etch it ASAP!
Quote:
Originally Posted by shaan View Post
Build two , get blown away and be proud of your PeeCeeBee, like us.

Satisfaction, gurranteed!
Hi Shaan & everybody

Finally I have a pair of PeeCeeBee even not finnish yet hehehe
Attached Images
File Type: jpg Not cleaned.jpg (137.5 KB, 1497 views)
File Type: jpg Atas Bawah.jpg (190.1 KB, 1050 views)
File Type: jpg Not Drilled yet.jpg (125.0 KB, 997 views)
File Type: jpg Tools.JPG (68.0 KB, 964 views)
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Old 14th May 2013, 01:23 PM   #402
sng001 is offline sng001  Australia
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Default My take of the PeeCeeBee Rev 1.4

I want to retrofit an AV amp with a pair of VSSA PeeCeeBee and I made the following PCB with thru-hole components. It is based on LazyCat Rev 1.4 with shunt regulator and JFET current source. I have made one channel & it is singing
Attached Images
File Type: png VSSA_L_1.4.PNG (190.6 KB, 973 views)
File Type: jpg DSC_7362.JPG (427.9 KB, 311 views)
File Type: jpg DSC_7365.JPG (372.1 KB, 252 views)
File Type: jpg DSC_7367.JPG (361.3 KB, 224 views)
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Old 14th May 2013, 04:54 PM   #403
shaan is offline shaan  India
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This is pretty ridiculous. I have mentioned multiple times that this thread is for discussion of VSSA PCBs "without CCS". That remains a topic of the original VSSA thread.

Seems like I need to speak louder.

My friends,
>>Please, PLEASE, don't post here if your amp has 1.CCS, 2.Multilayer Board, 3.Parallel caps in feedback node.<<

Any future post(s) containing/promoting any of the above will be considered as off-topic and will be reported to the moderators. I hope the point has been made clear.

Thankfully,
shaan
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Old 14th May 2013, 10:57 PM   #404
PMI is offline PMI  United States
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@Shaan: I think you have more than met your goal of making the VSSA accessible to everyone, and all the testimonials from those who have built a board from you schematic pretty much agree that the results are excellent with 6 transistors, and with components easily obtained anywhere. That pretty much speaks for itself...

I have been testing with the simplest supply I can think of, transformer, rectifier, 2x4700uF per rail, fuse... and comparing with a Tektronix bench supply, still sounds very good, at least at average listening level, and 8-ohm speaker (bigger load would probably require much larger reservoir caps).

If only all my home projects turned out this well...
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Old 15th May 2013, 03:14 AM   #405
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Default TeeOhThree PeeCeeBee Reference Post

OK, here is my reference post regarding the PeeCeeBee for TO-3 output devices.

My board is 4" x 3" (101.6mm x 76.2mm). Offset and bias are adjusted if required with the installation of fixed resistors; I temporarily installed a potentiometer to get what I wanted and installed the closest standard value onto the board. There are two different layouts to accommodate either the Japanese ECB pinout or the BC5xxC CBE pinout, so please be aware of which files you use. There is provision for compensation of the VAS. If a Zobel is desired then install it at the speaker terminals inside the case or solder it beneath the board.

This is in keeping with Shaan's desire to maintain a comparatively simple VSSA variant that is easy for the DIY builder to produce at home using common through hole components, an easy to produce single sided PCB and without any features like CCSs and parallel bypassing. My hope is that this serves anyone who chooses to use it well, enjoy.
Attached Images
File Type: jpg VSSA-ECB-Overview.JPG (608.7 KB, 373 views)
File Type: jpg VSSA-CBE-Overview.JPG (599.2 KB, 365 views)
Attached Files
File Type: pdf VSSA-ECB-Copper.pdf (19.6 KB, 220 views)
File Type: pdf VSSA-CBE-Copper.pdf (19.4 KB, 192 views)
File Type: pdf VSSA-ECB-SilkScreen.pdf (23.3 KB, 191 views)
File Type: pdf VSSA-CBE-SilkScreen.pdf (23.6 KB, 185 views)
File Type: pdf VSSA-ECB-SolderMask.pdf (11.2 KB, 154 views)
File Type: pdf VSSA-CBE-SolderMask.pdf (11.0 KB, 175 views)
File Type: pdf VSSA-Schematic.pdf (15.7 KB, 403 views)
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Old 15th May 2013, 07:05 AM   #406
sng001 is offline sng001  Australia
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Quote:
Originally Posted by shaan View Post
My friends,
>>Please, PLEASE, don't post here if your amp has 1.CCS, 2.Multilayer Board, 3.Parallel caps in feedback node.<<

Thankfully,
shaan
Hi Shaan,

I apologise for NOT reading all 400 messages before I posted my version of REJECTED PeeCeeBee. I read all the recent posts from page 31 onwards, plus the first five pages of this thread and I only found some casual reference to the omission of CCS on page 1.
Anyway I am not trying to pollute your thread but I just build a PCB with the parts that I already got to suit my requirements.
TO-92 JFET are a bit hard-to-find nowadays and they may need a bit of bread-boarding to get to the required CCS current. Our master LazyCat designed a simple and yet elegant way to use the TLVH431 for bias reference and the output bias had been very stable with this shunt regulator. This is my two cents.

Cheers, sng001
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Old 15th May 2013, 07:54 AM   #407
shaan is offline shaan  India
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Hi sng001.

I have absolutely no problem with the fact that those premium components may well bring VSSA to the top of the greatest ever amps list. However, this thread will remain in the "easy and available" way. Also, budget is a factor, and one can get a stereo set of complete boards done at or under $60, fast. Like any average LTP based amp.

Now that you mentioned it, I think I will add the rules in the first post. Hope it will help keep the thread clean.

Your board is very cool. And its not rejected or something like that, only pointed to the place it belongs - the great VSSA thread. After all, one must appreciate the hard work you've put into the layout.

shaan
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Old 15th May 2013, 12:32 PM   #408
sng001 is offline sng001  Australia
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Default A stereo set for under $60

Quote:
Originally Posted by shaan View Post
Hi sng001.

I have absolutely no problem with the fact that those premium components may well bring VSSA to the top of the greatest ever amps list. However, this thread will remain in the "easy and available" way. Also, budget is a factor, and one can get a stereo set of complete boards done at or under $60, fast. shaan
Hi Shaan,

I think that I can build a stereo set for just under $60, provided you know where to buy components and avoid expensive delivery charge.

The big-ticket items:
2 pairs of 2SJ162+2SK1058 = $20 (Tayda)
8 x Nichicon UFG1H102MHM = $10 (rs-components : 602-2523)
4 x Wima 6.8uF Film cap = $8 (MKS4C046805D00KSSD - WIMA - CAPACITOR, 6.8UF, 63V | element14 Australia)
5 x TLV431 = $2 (rs-components : 661-9846 )
5 x Rubycon ZL 2200uF 6.3V = $7 (rs-components : 627-0873 )
4 x 2SK117 = $1 (Tayda)
10 x 1uF film cap = $3.5 (Tayda)
TO-126 pair : 2SB1109+2SD1609 = $2 (from my parts bin)
BC550+BC560 = 0.50 (from my parts bin)
Subtotal = $54


RS-components does free delivery in most countries and the delivery charge for Tayda is very reasonable.

Cheers, sng001
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Old 15th May 2013, 12:35 PM   #409
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Quote:
Originally Posted by jkuetemann View Post
OK, here is my reference post regarding the PeeCeeBee for TO-3 output devices.
After this it's time to roll up my sleeves!

Regards zeoN_Rider
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Old 15th May 2013, 01:19 PM   #410
shaan is offline shaan  India
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Quote:
Originally Posted by sng001 View Post
Cheers, sng001
Hi sng. Seems you get my point and the rules very clear. I wish I was born in Australia.

1058/162 pair costs $7 where I live. Don't worry they can take the torture, tested.

Congrats on your bargain. We'll watch your progress in the VSSA thread.
cheers

.....


Thanks Jason and PMI for uploading the files. They will be linked in the first post shortly.
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