not sure how the pre ordering works, when the email came, it was already sold out ?? oh well could be because i was on the plane or something...
I used the standard 4U and did the drilling myself. Worked fine and runs warm to the touch but not overly hot.
I emailed Gianluca and he told me the Deluxe 4U 300mm heatsink has a coefficient of 0.38.
Given that an ambient temp of more than 30 C is exceptional in the UK that should be fine for me.
Given that an ambient temp of more than 30 C is exceptional in the UK that should be fine for me.
You can indeed get 400, but IDK if you can get it drilled and tapped, which is the sweet part of the "Deluxe" version...look at drop down box.
Russellc
Here is the corrected BOM, the previous one has been deleted..
Sorry for making your lives difficult! Especially secanbj
Sorry for making your lives difficult! Especially secanbj
My life is very easy, thanks to all people in this forum. Especially people like you Variac, who actually give instead of always asking.
/Anders
/Anders
Good evening folks. My VFET build has encountered its first issue. One channel has been adjusted ready for the VFET'S to be installed. I've got 1.5v across R5 and R6 with 0.1v at T18 relative to ground.
On the other amp board I adjust P2 to give me the required value of -10.7v at T17. However, with P1 fully anti clockwise I have +16.5v at T16. I need to get this down to +12.5v. Turning the clock fully clockwise only results in a change of +0.15 volts. Does this mean I've got the wrong value pot installed at P1? Anything else I can check? All my resistance readings checked out fine. Thanks, James.
On the other amp board I adjust P2 to give me the required value of -10.7v at T17. However, with P1 fully anti clockwise I have +16.5v at T16. I need to get this down to +12.5v. Turning the clock fully clockwise only results in a change of +0.15 volts. Does this mean I've got the wrong value pot installed at P1? Anything else I can check? All my resistance readings checked out fine. Thanks, James.
Variac,
Do you know at this stage when the VFET Supplemental Kit will be available again for purchase for the people in the Batch 3 order?
Thanks for all of your work on this effort so far.
Do you know at this stage when the VFET Supplemental Kit will be available again for purchase for the people in the Batch 3 order?
Thanks for all of your work on this effort so far.
Q5 & Q6 were switched
gary s,
There were enough for about half the people ordering Batch 3 and they are now gone. I'm afraid there will be no more Supplemental kits.
People can use the BOM to order from their most local suppliers.
gary s,
There were enough for about half the people ordering Batch 3 and they are now gone. I'm afraid there will be no more Supplemental kits.
People can use the BOM to order from their most local suppliers.
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Essential kits.......vfets...
What about the kit with the pc boards, vfets, brackets, etc. is that gone too?
Thanks.
What about the kit with the pc boards, vfets, brackets, etc. is that gone too?
Thanks.
It seems like they're all sold out:
http://www.diyaudio.com/forums/pass-labs/276711-sony-vfet-amplifier-part-2-a-275.html#post4989665
😱 what !? how i missed that ? sad
so i will rebuild a choke load SITAMp with the last pair of 2SK82 i have ..
I haven't gotten around to building my VFET kit and won't be able to in the foreseeable future. If anyone missed out on the third round, I'm going to be listing my VFET kit and supplemental kit in Swap and Sell later today. Once it's listed, first PM gets it.
Sent from my iPhone using Tapatalk
Sent from my iPhone using Tapatalk
Marc,
When more people start reporting how happy they are with their VFET amplifiers you will regret your decision. I would not do it. The kit has unlimited shelf life, just save it.
When more people start reporting how happy they are with their VFET amplifiers you will regret your decision. I would not do it. The kit has unlimited shelf life, just save it.
Prerequisites for building this amp?
I am looking for suggestions for a project to do that would better prepare me for this, as I have only built the B1 buffer, never an amp. I have read this entire thread and love the back and forth, but don't understand much of it at a deep level. I can follow instructions but I don't want to risk these VFETS so I want to practice on something less complicated! Thanks for your suggestions.
Ron
I am looking for suggestions for a project to do that would better prepare me for this, as I have only built the B1 buffer, never an amp. I have read this entire thread and love the back and forth, but don't understand much of it at a deep level. I can follow instructions but I don't want to risk these VFETS so I want to practice on something less complicated! Thanks for your suggestions.
Ron