CRC Power Supply (Class A amplifier)

[prasi]

calculate VA of each secondary voltage separately. e.g. 18 v may be for power amp. but 12v may be for pre or other circuit with low current.

something like this for softstart (circuit was designed by UK member based on diya softstart).

 

[Harry3]

Personally I would not use a 0.25W resistor (R2) in mains circuitry. The're not designed for that purpose, especially if mains voltage is 220V or more.

 

[prasi]

yes, its a mistake that 0.25W has crept up in the sch for R2, I used a 3W part, 750V part.

PR03000201004JAC00 Vishay / BC Components | Mouser India

 

[ChrisM91]

Sorry to bump this old thread
Wondering if there are any PCBs left?

 

[prasi]

hi chris,
plenty of pcbs left. let me know qty and email and shipping address by pm. i will send a paypal invoice
regards
prasi

 

[ChrisM91]

Are the diode bypass caps necessary when using MUR860? I am thinking no

Does anyone have a part number for the heatsinks that would work with the TO-220 MUR860 rectifier diodes?
I also kind of wonder if I need heatsinks for this supply as it is only drawing 100mA (phono PSU).

 

[rayma]

TO-220 heat sinks are not needed for only a 100mA load.

 

[prasi]

Are the diode bypass caps necessary when using MUR860? I am thinking no

Does anyone have a part number for the heatsinks that would work with the TO-220 MUR860 rectifier diodes?
I also kind of wonder if I need heatsinks for this supply as it is only drawing 100mA (phono PSU).

This will be too big a crc psu for 100mA. you can design something smaller with regulators. i have a to-220 rectifiers + crc+lm317/337 psu pcb if you need it, quite small.

 

[Ground point 9]

Hello Prasi,

I am a beginner planning to build an as-yet-undecided Class-A amp.

Is your CRC PSU board suitable for powering First Watt amps? Their typical DC requirement is between +/-24V and +/-32V.

Thanks.

 

[prasi]

Hello all,
I have 20 nos. of CRC PSU PCBs left in my stock. I want to get rid of the stock and hence selling at discounted prices. original price was usd 6.5 a piece.
I am offering it at usd 4 a piece.
if anyone wants a few, please share your paypal email, postal address with me via PM.

regards
prasi

I need to make provision for buying v-fet lottery amp kit

 

[prasi]

last ~10 PCB remain. there may never be a chance to manufacture them again in 2.4 mm thickness material, as my manufacturer doesn't have the material and doesnt plan to procure any more.

 

[rss388]

What would be shipping to the US? Thinking either 2 or 4 pcbs

 

[prasi]

4.5 USD a piece, for 2 PCB shipping would be 6USD, for 4 PCB , it will be 7.5USD approx.

 

[rss388]

PM to you

 

[odie1427]

Hi Prasi,

Any spare more PCB. Spare me 2 Boards?

Thanks,
odie

 

[prasi]

Hello Odie,
Sorry for the late reply. Yes, I have some CRC PSU PCB.
I will send you a paypal invoice.
regards
prasi

 

[odie1427]

CRC Power supply boards

Hi Prasi,

Already paid the invoice you sent me.
Thanks,
odie1427

 

[Prodigy85]

Hi Prashant ji, any PCB’s remaining? If so 2 for me please

 

[HRDSTL]

Hi all,
I have the CRCRC almost done, but I can't decide what size filter capacitors to buy.

6x 10 000 uF
6x 15000 uF
6x 18000 uF
6x 22000 uF

I will power one board with 2pcs JAT501 (100W/ 4ohm). I will use 400W toroidal transformer, common for both channels

Thx.

 

[ticknpop]

Buy the biggest you can afford and use a soft start circuit