juke
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Post by juke on May 19, 2013 22:28:02 GMT
These are nice Hammond boxes but the PCB won't slide in there. Thanks to all, I have the box ordered from Maplin incl VAT AND free delivery £17.99 so well pleased. Farnell were coming out around £25 delivered, I find they are getting very expensive for smaller orders. Thanks again Dicky for the labels. Only a few more bits to order.... Syd |
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dicky
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Post by dicky on May 20, 2013 6:22:09 GMT
The labels are in the post, Syd. I only did one of each as I ran out of tape - so be careful with them!  I've ordered another tape, so let me know if you need any more. |
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juke
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Post by juke on May 20, 2013 9:59:14 GMT
Thanks Dicky, that was quick! Sorry I used up your last bit of tape  Syd |
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juke
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Post by juke on May 20, 2013 21:52:56 GMT
Hi Frans
On the filter board, I'm using Option 1. The capacitors C1 to C3 aren't specified, are they omitted?
Thanks
Syd
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solderdude
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Post by solderdude on May 21, 2013 5:13:35 GMT
Yes, they are omitted as they would simply be in parallel to C4 and C5.
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juke
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Post by juke on May 21, 2013 10:05:45 GMT
Thanks Frans, just wanted to be sure  Final parts ordered so hopefully I'll be up and running soon. Syd |
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juke
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Post by juke on May 22, 2013 22:43:00 GMT
Hi Dicky
The labels arrived safely today, thanks again.
Mind you, I was a bit mystified that someone had sent me a letter with no writing until the little labels floated to the floor!
They really are a neat job, that little machine is a must when one turns up.
Just need the case to put them on now...
Syd
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dicky
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Post by dicky on May 23, 2013 5:30:46 GMT
No problem, Syd
Make sure you trim them with a very sharp knife (a scalpel is ideal) - that way you'll get flush edges that almost disappear.
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juke
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Post by juke on May 26, 2013 15:48:09 GMT
Frans I have the HE-6 filter up and running and the combo sounds superb! I have used Wima film capacitors for the '2.2uF 2.54 or 5.08mm (1 or 2 mil) ceramic multilayer C0G/NP0 / film' but to get the board to fit into the recommended case I need to tilt them over and leave the legs exposed (! ) I have tried to identify alternatives to tidy things up but so that I buy the right surface mount item, which seems to be all that is on offer, what does the 1 or 2 mil refer to? (I've already looked up the C0G bit) Thanks Syd |
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dicky
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Post by dicky on May 26, 2013 16:20:11 GMT
Hi Syd,
1 mil is 2.54mm pitch and 2 mil is 5.08mm pitch for the legs.
Dicky
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juke
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Post by juke on May 26, 2013 17:41:44 GMT
Thanks Dicky, I see that now that you have explained it! I assumed it was some extra bit of info.
Syd
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Javier
Administrator
Digital bytes
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Post by Javier on May 26, 2013 18:30:29 GMT
Does anyone one know where to get 2.2uF and/or 150nF through hole C0G/NP0s at a reasonable price?
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solderdude
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measureutternutter
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Post by solderdude on May 26, 2013 20:01:42 GMT
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juke
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Post by juke on May 26, 2013 22:45:17 GMT
They are the type I have in use Frans, but they stop the board sliding in unless I bend them inward and just solder the end of the leg to the board, which admittedly sounds fine and feels secure. That's why I was looking for the second type and as Javier says they are quite expensive though I was still looking through a long list. If there is no problem with what I have done I'm happy to leave it like that. I found the Wiki earlier today, thanks - good info. Syd |
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solderdude
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Post by solderdude on May 27, 2013 6:19:09 GMT
The 150nF will not be too high.
The 2.2uF could be mounted laying down which is no problem.
fix them with hotmeld glue or something if needed.
For the 2.2uF you can also use X7R (SMD) caps as this is only high-pass and no filter component and there is no DC voltage on it. there are also no AC voltages across them as they are coupling caps designed to pass all audio frequencies.
between 0oC and 40oC there is no change in capacity anyway.
The higher the voltage rating the better they are.
Look for 100V versions if not found 50V otherwise 25V.
RS: 758-8103
Farnell: 165-8884
a 1206 size capacitor can be mounted on the pads.
Would not recommend to use smaller sizes.
For the TH you could even use Z5U for coupling caps as they too do not vary much between 10oC and 40oC.
Also the tolerance is not of importance here as it is already over dimensioned
Would NOT use Z5U in SMD sizes though
Farnell: 145-7711
RS: 538-1590
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