F5X -- the EUVL Approach - The Build Thread - Page 35 - diyAudio
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Old 14th January 2013, 10:32 AM   #341
NicMac is offline NicMac  Italy
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16V - I am using a lab supply with adjustable current limit for safety.
I actually did find the time to assemble the transformer cradle, rectifiers etc. last night so I will be using this soon.

Did you happen to find a suitable inrush current limiter thermistor at Digikey?
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Old 14th January 2013, 12:09 PM   #342
EUVL is offline EUVL  Europe
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> Simply like this?

NO.
Turn round 90. And remove all the jumpers to Gnd, without saying.
And read F5X Preamp Basic Circuit Topology carefully (P.2 of the article).




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Old 14th January 2013, 12:10 PM   #343
EUVL is offline EUVL  Europe
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> Did you happen to find a suitable inrush current limiter thermistor at Digikey?

The one we proposed is available from DK or Mouser, not ?


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Old 14th January 2013, 12:26 PM   #344
NicMac is offline NicMac  Italy
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>NO.
Turn round 90. And remove all the jumpers to Gnd, without saying.

Difficult to remove jumpers from a photo, but of course no connections to Gnd

I actually had it turned around 90˚ first as this made more sense to me. However, electrically I cannot see the difference between these and the X (see drawing below)

>And read F5X Preamp Basic Circuit Topology carefully (P.2 of the article).

I guess I should read it better
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File Type: jpg jumpers.001.jpg (29.7 KB, 300 views)
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Old 14th January 2013, 12:28 PM   #345
NicMac is offline NicMac  Italy
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>The one we proposed is available from DK or Mouser, not ?

Yes you did, but as I am about to place a Digikey order I was just probing Davide.
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Old 14th January 2013, 01:36 PM   #346
NicMac is offline NicMac  Italy
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Quote:
Originally Posted by NicMac View Post
>The one we proposed is available from DK or Mouser, not ?

Yes you did, but as I am about to place a Digikey order I was just probing Davide.
I just realized that heinz1 (in his unofficial BOM) had actually found them (or similar) on Digikey:
50R 6A 570-1109-ND
75R 4A 570-1011-ND

I guess I will take one of each and decide later which to use
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Old 14th January 2013, 01:38 PM   #347
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You are right.
Any of the above would have been electrically identical.
All the intersections require soldering / electrical connections, without saying.




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Old 14th January 2013, 02:03 PM   #348
heinz1 is offline heinz1  Europe
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One of the thermistors originally suggested by Patrick (Ametherm MS32 50006L) is not available at DK.

MS32 50006 is a non-stock item; minimum order 25: 570-1020-ND

That's why I proposed AS32 50006: 570-1109-ND

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Old 14th January 2013, 02:59 PM   #349
EUVL is offline EUVL  Europe
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Just try.
They don't cost that much.

I also cannot say anthing about those I have not tried.
And you can read datasheet as well as I do.




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Old 14th January 2013, 07:39 PM   #350
NicMac is offline NicMac  Italy
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Just a few pics before I close it up.
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File Type: jpg Cradle.jpg (64.7 KB, 284 views)
File Type: jpg Cradle2.jpg (53.3 KB, 275 views)
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