MixBuzz1 Build/Support thread

SKJGProject said:

is this one good? i have -70db humming problems with my tube pultec and want to use a shielded one if it's necessary...
http://de.rs-online.com/web/search/searchBrowseAction.html?method=getProduct&R=2238550

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I use a regular toroidal transformer and don't have problems with humming ! So yes it's ok .

Hi Igor,
    Are there any more kits available for the full version.  I would also like to buy the led meter does that come with the kit?

IGOR, where are you??????

CapRock said:

Hi Igor,
    Are there any more kits available for the full version.  I would also like to buy the led meter does that come with the kit?

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You may want to try Rukkus's kit if you are not a pro. I wish I had done that now. This is one tough build with all the confusing options.

piano said:

1) Can I use the SOFT/TIGHT and DUAL switches with the stepped LORIN switch/pcb stock Igor kit build --- instead of using pots?

Can someone answer this please.

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If you use lorlin rotary switch No, with potmeters Yes ! Look at the picture from Igor !

Danny

Hi everyone !

I’ve nearly finished my research for the parts but as my knowledge is very limited, I need your help to confirm that my IC and diodes are right. So here we go :

DIODES :
- for the 1N4148, mouser link http://fr.mouser.com/ProductDetail/Fairchild-Semiconductor/1N4148TA/?qs=sGAEpiMZZMtvcUztdGSumMPamFOtv2iGNcGbv49KEfE%3d
- for the 1N4004, mouser link http://fr.mouser.com/ProductDetail/Fairchild-Semiconductor/1N4004/?qs=sGAEpiMZZMtvcUztdGSumBLnbzfMO8H%252bP%252b28PAMBgqE%3d
- for the 1N5400, mouser link http://fr.mouser.com/ProductDetail/ON-Semiconductor/1N5400G/?qs=sGAEpiMZZMtEwUVCuofpuN8xD8qvNRjULIj6Pp2ty5o%3d
- for the 1N4007, mouser link http://fr.mouser.com/ProductDetail/Fairchild-Semiconductor/1N4007/?qs=sGAEpiMZZMtEwUVCuofpuI3LdHjUmCjoPsseGZUBmsM%3d

Ics :
- for the TL074, mouser link http://fr.mouser.com/ProductDetail/Texas-Instruments/TL074CNE4/?qs=sGAEpiMZZMtCHixnSjNA6Dh9CQmOfcFcWC%252bLpGtMkR0%3d
- for the OPA604, mouser link http://fr.mouser.com/ProductDetail/Texas-Instruments/OPA604APG4/?qs=sGAEpiMZZMtCHixnSjNA6G1EosyAtlRsZCwl%252bH43yq4%3d
- or the NE5534 (in replacement of the OPA604), mouser link http://fr.mouser.com/ProductDetail/Texas-Instruments/NE5534AP/?qs=sGAEpiMZZMtCHixnSjNA6CumnoLUElGjy%2feFGFMqIic%3d
- for the THAT1246, mouser link http://fr.mouser.com/ProductDetail/THAT/1246P08-U/?qs=sGAEpiMZZMutXGli8Ay4kMqMzuq7GtC7DL9D2jrazWQ%3d
- for the THAT1646, mouser link http://fr.mouser.com/ProductDetail/THAT/1646P08-U/?qs=sGAEpiMZZMtOwpHsRTkso2wiNZXG7qWmgPu4Rt4yuHI%3d
- for the CD4011, mouser link http://fr.mouser.com/ProductDetail/Texas-Instruments/CD4011UBEE4/?qs=sGAEpiMZZMtMa9lbYwD6ZOqMILV%2fSzgW%2f%252bShhWjodfY%3d
- for the CD4016, mouser link http://fr.mouser.com/ProductDetail/Texas-Instruments/CD4016BEE4/?qs=sGAEpiMZZMvjbjwkTuU2aWy0iadLvSNIw30ovlKzAPw%3d

As you can see, I tried to make my shopping exclusively at Mouser for limited shipping costs, but I can’t find the LM3914N for the LED Meter PCB, only at Farnell ( link http://fr.farnell.com/national-semiconductor/lm3914n-1/driver-de-barre-graphe-a-led/dp/9486500 ). Is there an equivalent at Mouser ? I can’t find one ! Help me please !!!

TRANSISTOR :
- for the 2N3904, mouser link http://fr.mouser.com/ProductDetail/Fairchild-Semiconductor/2N3904TFR/?qs=sGAEpiMZZMtvtNzZ3W%252bLwGL2%252bt5DXryvvoTUGWMMUJE%3d
I hope you could help me. Thanks.

Ben

(more to come… ;D ;D ;D)

evilcat said:

As you can see, I tried to make my shopping exclusively at Mouser for limited shipping costs, but I can’t find the LM3914N for the LED Meter PCB, only at Farnell ( link http://fr.farnell.com/national-semiconductor/lm3914n-1/driver-de-barre-graphe-a-led/dp/9486500 ). Is there an equivalent at Mouser ? I can’t find one ! Help me please !!!

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Mouser doesn't carry those, unfortunately there aren't any substitutes that I know of.

It's allright, I've found them in France, thanks anyway ! What about the other parts ? Anyone ?

evilcat said:

It's allright, I've found them in France, thanks anyway ! What about the other parts ? Anyone ?

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As far as I can tell those are all good as well.

anybody planning to etch chefducuisines led board?

Thanks Ben. Anyone else confirmed ?

Hey guys !

Does the meter switch need to be 3 way ? On the front panel I see "IN / OUT / GR", so I think it's a 3 way. But on the BOM I only see 2 way switches... :-\Anyone ?

Thanks.

Ben.

evilcat said:

Hey guys !

Does the meter switch need to be 3 way ? On the front panel I see "IN / OUT / GR", so I think it's a 3 way. But on the BOM I only see 2 way switches... :-\Anyone ?

Thanks.

Ben.

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It's an on-off-on switch

Thanks Brio ! 

anybody planning to etch chefducuisines led board?

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I could probably help "some" folks who would like to, well if you're not in a rush, just to help out, not starting a factory here   .
PM if required.


PS: That board could be a tricky one for the assembly, small traces and pads get off quickly on home etched boards if you made mistake and overheat....

What FUSE do I need for this project ?
Thanks.

evilcat said:

What FUSE do I need for this project ?
Thanks.

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Following info copied from another thread to help you to calculate the fuse by yourself

---
I decided to email Triad Magnetics and I'm glad I did. Their engineering manager responded quickly with this information...

"Since the VPT36-690 transformer is rated at 25VA (Volts times Amps), the theoretical input current would be 25VA / 115V = 0.217A or 25VA / 230V = 0.109A.  However, this does not include the magnetizing current or inrush currents – so we generally recommend the fuse be rated at 1.3 to 1.6 times the theoretical input current.  It is very important that a Slow Blow (time delay) fuse be used to allow for inrush currents that exceed the fuse rating to prevent nuisance fuse blowing."

This seems like a very good guideline for fusing the transformer.

Yeah Tomcat !!!  ;D ;D ;D
Thank you very much !

Now another question : is there a way to use the "Auto Release" only with the constinously variable version ? It could be cool to have a 3 way switch with "single/dual/auto" release option, isn't it ?
Igor ? A quick hand drawing maybe ? Thanks

Ben

Copy from another thread to help you to calculate the fuse by yourself

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I asked that too many page ago and didn't got an answer... i'm a bit dumb so could you give a link to the thread (sb4000 i suppose!).

It was a copy from another thread. And i dont know which one it came from. Use the search button or better ... read my post again, use your brain, take a calculator, read the datasheet of your transformer, apply the (easy) calculation from my post on your transformer and line specs and youre done  :

To avoid more thread chatter:

Transformer VA / Line Volts * 1.5 = Slow Blow Fuse