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Peeceebee V4H


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amit_s

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Recieved my V4h kit, will be building it in in last week of December.
 

amit_s

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What is the transformer rating you are using? I have planned for 600va 40-0-40 from torotrans.
 

MaSh

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I have a Torotrans toroid which I had ordered for the Peeceebee amp. However, with that project shelved, the transformer is lying idle. Its quite a heavy transformer with a Lot of available connections. I got it for 4.5k. Please PM if anyone is interested to pick it up.

MaSh
 

jls001

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600VA is sufficient but a higher VA will have lesser rail-sag under load so 800VA (400VA per channel for dual mono) was recommended by Shaan.

40V-0-40V transformer with ~56.5V after rectification/filtering.
 

amit_s

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600VA is sufficient but a higher VA will have lesser rail-sag under load so 800VA (400VA per channel for dual mono) was recommended by Shaan.

40V-0-40V transformer with ~56.5V after rectification/filtering.
Would there be substantial sonic benefit?
I have read that big toroidal transformer is susceptible to hum and buzzing noise if some dc component is there in the mains. Also, there will be increase in approx 1 kg weight.
 

spirovious

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Would there be substantial sonic benefit?
I have read that big toroidal transformer is susceptible to hum and buzzing noise if some dc component is there in the mains. Also, there will be increase in approx 1 kg weight.
May transformer not struggling with serious load.May be less heat.May be better dark background in sound.When using dcb1 or B1 ,which need very less current(10mA?),we use 1 amp transformer.
 

jls001

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Would there be substantial sonic benefit?
I have read that big toroidal transformer is susceptible to hum and buzzing noise if some dc component is there in the mains. Also, there will be increase in approx 1 kg weight.
If pushing the amp to high loads the bigger transformer will help with the extra headroom. There shouldn't be sonic benefits in regular usage.
 

surfatwork

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A larger transformer will also run cooler because of the extra headroom. Issues of transformer hum can be resolved by shielding, or repositioning/rotating the transformer. The most common cause of hum (ground loops) has nothing to do with transformer size.
 

amit_s

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Finally, got my first diy project Peeceebee v4h done. Amp is singing with no noise or hiss at all even if I bring my ear close to test speaker. I was sceptical about noise because I have used a big 800va toroid and also being my first diy I wasn't sure about organising wiring and placement of components. Thanks to @shaan and @Beginner_N for prompt and valuable support. I added a pic of internals any suggestion for improvement.

Using 4ohm sony coaxial car speakers for testing, will buy floorstanders .

34996
 

amit_s

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Any suggestions for best match of speakers with v4h, budget upto 1 lakh?
 
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