Modded Crack - add bypass cap, choke and Cree diodes

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Offline baseonmars

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Reply #105 on: June 08, 2020, 07:12:41 AM
So something else you could try regarding the cell tower.  Install one end of a Z5U cap to each tab on each RCA jack.  Twist the free ends together, then run a wire from those ends to the ground tab on the IEC power entry module.

Hey Paul, so... I had more or less given up on getting rid of the last night until one night when I heard it, whilst in bed and with ear plugs in. It must be tinnitus that sounds similar to RFI. I feel like a bit of an idiot but figured I'd come clean in case there are others out there chasing after the last bit of noise.

For what it's worth the diodes and tube shield did have a measurable difference on noise floor/RFI reduction, but the last bit was definitely in my head/ear.



Offline 2wo

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Reply #106 on: June 08, 2020, 05:50:48 PM
I have a cell tower about 500 feet away from my house and it has never been a problem

Now if I could say the same for the shitty power I get...John

John Scanlon


Offline Jimb0

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Reply #107 on: October 07, 2021, 03:05:49 PM
PCB - https://www.partsconnexion.com/PCB-77727.html
Cree Diodes https://www.mouser.co.uk/ProductDetail/Wolfspeed-Cree/CSD01060A?qs=%2Fha2pyFaduha8e7L7P6H8AQPAaWzRYR18hPNYjU5%252Bzc%3D

Is partsconnexion the only place to get the PCB?

Also, it's been a while since these were released. Are these still the Cree Diodes to use or is there something else out there?



Offline Paul Birkeland

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Reply #108 on: October 07, 2021, 05:51:44 PM
For the Crack if you're having trouble finding the 1A/600V Cree diodes, there are higher current versions that you can substitute.

Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man


Offline tim273

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Reply #109 on: October 08, 2021, 10:06:36 AM
PCB - https://www.partsconnexion.com/PCB-77727.html
Cree Diodes https://www.mouser.co.uk/ProductDetail/Wolfspeed-Cree/CSD01060A?qs=%2Fha2pyFaduha8e7L7P6H8AQPAaWzRYR18hPNYjU5%252Bzc%3D

Is partsconnexion the only place to get the PCB?

Also, it's been a while since these were released. Are these still the Cree Diodes to use or is there something else out there?

Those ones are what I think most people used, but you could try these: https://www.mouser.com/ProductDetail/Wolfspeed-Cree/C6D04065A?qs=%2Fha2pyFadujYuAKy3YnKTEHyWCBrjYBu8BL2A6RZVomCRp63dgtoXQ%3D%3D



Offline Jimb0

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Reply #110 on: October 12, 2021, 11:45:56 AM
Thanks for the help guys. I am going to try those cree diodes that you suggested Tim!



Offline davve34

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Reply #111 on: October 26, 2021, 08:47:39 PM
No need to change the values on the caps in the power supply when added choke(s) ?



Offline Paul Birkeland

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Reply #112 on: October 27, 2021, 05:25:23 AM
No.

Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man


Offline Jimb0

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Reply #113 on: March 16, 2024, 04:28:38 PM
Hi guys. I'm buying some Cree Diodes from PartsConnexion. Can I use 1A 600V?



Offline Paul Birkeland

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Reply #114 on: March 17, 2024, 05:18:55 AM
Hi guys. I'm buying some Cree Diodes from PartsConnexion. Can I use 1A 600V?
Yes.

Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man