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Old 9th December 2012, 11:12 AM   #3221
qusp is offline qusp  Australia
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Quote:
Originally Posted by 6L6 View Post
Patrick's heatsinks have them side by side so a pair of J74 could be used instead of a J109, on the same pad. For good thermal tracking face to face would be the most logical in this project.
which is why I mentioned it first (but made a pretty obvious mistake), thermal tracking would be every bit as good side by side+opposed if they can use the heatsinks, also allows the current to be increased. its not like the device is anywhere near the face

they are not just designed that way so they can replace j109, but also so they can be used in sets of 4 ala SEN/CEN, which has nothing to do with j109
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Old 9th December 2012, 12:04 PM   #3222
Zen Mod is offline Zen Mod  Serbia
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Quote:
Originally Posted by permaneder View Post
or that one?
that one

btw. - what's that ?

Sprint ?
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Old 9th December 2012, 12:26 PM   #3223
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that one

btw. - what's that ?

Sprint ?
Ja, simple operating and sufficient for my demands
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Old 9th December 2012, 12:30 PM   #3224
Zen Mod is offline Zen Mod  Serbia
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do you mind sharing (zipped) that last one file ?
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Old 9th December 2012, 12:51 PM   #3225
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Of course. Send a PM and I'll mail the file plus the Gerber files
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Old 9th December 2012, 01:33 PM   #3226
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Quote:
Originally Posted by permaneder View Post
or that one?

lhquam, permaneder and Tea-Bag. Your PCBs are great art, organization skills and a test bed for many experiments. Will you consider the following?
  • A PCB for Unbuffered diyF6. The concerns of qusp disappear.
  • Adding a headphone output which is uncommon in Pass amps. Maybe beneficial for tweaking/balancing the important good distortion.
Best regards.
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Old 9th December 2012, 01:44 PM   #3227
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Quote:
Originally Posted by Antoinel View Post
lhquam, permaneder and Tea-Bag. Your PCBs are great art, organization skills and a test bed for many experiments. Will you consider the following?
  • A PCB for Unbuffered diyF6. The concerns of qusp disappear.
  • Adding a headphone output which is uncommon in Pass amps. Maybe beneficial for tweaking/balancing the important good distortion.
Best regards.
Hi there,
Mine can be jumpered to not use the Buffering of the JFETs, source resistors for R100's or Toshiba's. In the end I will probably run without them, since my impedance is low from my electronic crossover. But for the initial testing, all parts will go in, and options guided for IRF240's or Fairchild MosFets

A headphone output is a matter of typing the outputs to a headphone jack sharing common ground. Something IMO does not belong on a PCB.

My boards are being built, so changes now are not really top of mind, unless there is a mistake and the board will not work - OR the idea is so brilliant it's worth a re-spin.

Last edited by Tea-Bag; 9th December 2012 at 01:47 PM.
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Old 9th December 2012, 02:11 PM   #3228
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Originally Posted by Tea-Bag View Post
Hi there,

My boards are being built, so changes now are not really top of mind, unless there is a mistake and the board will not work - OR the idea is so brilliant it's worth a re-spin.
Thanks Tea-Bag. I look forward to bying your PCBs, and others from each artist to pursue dedicated applications.
Best regards.
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Old 9th December 2012, 02:20 PM   #3229
lhquam is offline lhquam  United States
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I like to make power and output connections using hexagonal standoffs attached with #4 (or M3) screws. That allows removing the boards without needing to unsolder anything. Similarly, make the spacing (and size) of the input connections so that a .1" 2-pin header can be used.

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Tell me please, what would you like to tweak? I'll try to implement it.
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Old 9th December 2012, 02:30 PM   #3230
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Originally Posted by lhquam View Post
I like to make power and output connections using hexagonal standoffs attached with #4 (or M3) screws. That allows removing the boards without needing to unsolder anything. Similarly, make the spacing (and size) of the input connections so that a .1" 2-pin header can be used.
The connectors on my layout are 6.3mm flat jacks. No desoldering necessary.

2.54mm pin headers are no issue. I could easily change the board, if you like.

Last edited by permaneder; 9th December 2012 at 02:53 PM.
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