Bunch thanks to Mr Pass for top notch wonderful layout boards.
Thanks to Jason for supplementary option possibility that is greatest news today
& good reason to be smile
DiyAudio Store Rock !
ps. registration updated
gentlemen,
thanks all of you and best wishes for making this project happen to us! 🙂
do I understand correctly that there will be two kits available, the "essentials" and the "supplemental" , and in these kits all required components and parts (with optionally amp housings) are included?
how about the PSU? are you going to provide it as well ? or this is already on diyaudio store from the former projects?
my wish is to order a complete set of everything if possible ;-)
best regards
The diyaudio PSU PCB is compatible with this project, but I believe that the transformer and PSU components, as well as internal wire, connectors and assorted parts will have to be sourced independently. The supplemental parts kit is to assemble the amplifier pcbs if I understood correctly.
thanks for the info... i wished the organizers would provide all required parts and componets as the amp cam amp kit ... much easier/faster to build ;-)
Parts in waiting
Had the harder to get goodies on hand to build the amp for some time. Just need the PCBs and VFETS to hit the ground running. Once those are here only have to decide whether to cut the gain on my BA-3 or use a DCB1 for the preamp.
Cant wait!
Had the harder to get goodies on hand to build the amp for some time. Just need the PCBs and VFETS to hit the ground running. Once those are here only have to decide whether to cut the gain on my BA-3 or use a DCB1 for the preamp.
Cant wait!
Attachments
Last edited:
There is one kit available for sure, The Essentials
That has the 2pairs of VFETS, the 2 PCBs, the 2 brackets, the mica insulators, the thermal grease, and all the nuts and bolts and washers to mount the Active devices to the PCB and PCB to the bracket, and the bracket to a chassis, which isn't supplied. The bracket will bolt perfectly onto the UMS heatsinks with their threaded holes. The heatsinks are available separately or are included with the deluxe chassis. The bracket will of course work with many other chassis' if you drill and tap holes in the heatsink to fit.
We haven't decided if we can do the Supplemental Kit which would include most of the electronic components. for the amp PCB. There seems to be interestso we are considering it.
In either case the power supply parts aren't included. No PSU PCB, electronic components or the transformer.
If things work out, To get the most complete kit you would order:
The Essentials Kit
The Supplemental Kit if we offer it
From the diyAudio Store:
A 4U or 5U Deluxe chassis (4U is fine for most environments)
A Back Panel Parts kit
A PSU PCB
You would still need to obtain the transformer and PSU components
That has the 2pairs of VFETS, the 2 PCBs, the 2 brackets, the mica insulators, the thermal grease, and all the nuts and bolts and washers to mount the Active devices to the PCB and PCB to the bracket, and the bracket to a chassis, which isn't supplied. The bracket will bolt perfectly onto the UMS heatsinks with their threaded holes. The heatsinks are available separately or are included with the deluxe chassis. The bracket will of course work with many other chassis' if you drill and tap holes in the heatsink to fit.
We haven't decided if we can do the Supplemental Kit which would include most of the electronic components. for the amp PCB. There seems to be interestso we are considering it.
In either case the power supply parts aren't included. No PSU PCB, electronic components or the transformer.
If things work out, To get the most complete kit you would order:
The Essentials Kit
The Supplemental Kit if we offer it
From the diyAudio Store:
A 4U or 5U Deluxe chassis (4U is fine for most environments)
A Back Panel Parts kit
A PSU PCB
You would still need to obtain the transformer and PSU components
many thanks for the clarification. i do very hope you will offer the supplemental kit as well.
best wishes
Congratulations!
Anticipation of this has got me actually finishing previous projects in anticipation!
I wouldn't have believed it possible...
A. 🙂
Anticipation of this has got me actually finishing previous projects in anticipation!
I wouldn't have believed it possible...
A. 🙂
Just a quick mention - when you sign up to the notification list, you are sent a confirmation email, which contains a link that must be clicked in order for your signup to go live. This is all using the popular Mailchimp platform, so there should be no system more reliable than that, but two people have said they didn't receive that confirmation email. The confirmation email needs to be opened and the link inside that must be clicked in order to get added to the list.
If you didn't receive it, please (1) check your spam/promotions folder, (2) do a search of your entire inbox to see if you maybe have set up an email filter that squirrelled it away somewhere you don't look, and (3) if you still can't find it please re-submit your application. If you use the same email address, it will re-send the confirmation email.
If all else fails, just email the answers to the signup questions to us at contact@diyaudiostore.com.
The signup link again: Sony VFET Kit Interest Group
The response has been great and the list will be closed for applications shortly. The kits will be available for sale from the store initially via a secret URL that will be made available only to people on the list. After 72 hours the kits will then be available for sale to the general public at the store. This should give everybody that has great interest in this project to enough time secure their kit and not have to worry about missing out. Thanks for your patience 🙂
If you didn't receive it, please (1) check your spam/promotions folder, (2) do a search of your entire inbox to see if you maybe have set up an email filter that squirrelled it away somewhere you don't look, and (3) if you still can't find it please re-submit your application. If you use the same email address, it will re-send the confirmation email.
If all else fails, just email the answers to the signup questions to us at contact@diyaudiostore.com.
The signup link again: Sony VFET Kit Interest Group
The response has been great and the list will be closed for applications shortly. The kits will be available for sale from the store initially via a secret URL that will be made available only to people on the list. After 72 hours the kits will then be available for sale to the general public at the store. This should give everybody that has great interest in this project to enough time secure their kit and not have to worry about missing out. Thanks for your patience 🙂
Ooops
I got the confirmation email on the 14th and clicked on the confirm then.
Today, I looked at the email again and clicked on it again, oops?
Did I just change my order in the wait list?🙁
I got the confirmation email on the 14th and clicked on the confirm then.
Today, I looked at the email again and clicked on it again, oops?
Did I just change my order in the wait list?🙁
I checked and your place in the queue is as it was, we have the initial join time, and it doesn't get "reset" if you adjust things.
Hi Jason,
I just wanted to say thanks! This is a hell of a group buy and the job being done managing it is a hard one, and one being done well. Thanks to all concerned!
I just wanted to say thanks! This is a hell of a group buy and the job being done managing it is a hard one, and one being done well. Thanks to all concerned!
NP, and Jason (and anyone else involved), thank you for going through the trouble, both to create this kit, and to prevent a bot from scooping up all, or a lot of these kits to profit from Nelson's, and your, expertise and hard work!
2 pairs of the VFETs are included in the essentials kit. please forgive my ignorance , but don't we need 4 matched pairs (8 in total) of them for a stereo (or a pair of mono) amp?
No, not in DIY kits. Only a pair (2sk82/s2j28) are used in each channel for a stereo amp (2-pairs of 82/28, totaling 4 Vfets in each amp).
ok. many thanks for the info. i was a bit confused as i was referring to the diagrams shown in the nelson's document
http://www.firstwatt.com/pdf/art_sony_vfet_pt2.pdf
The original version was designed with 2 pairs per channel for higher output at a lower distortion. Then Nelson did some more testing and found that only one pairl per channel could be used at just a little more distortion and still with great sound. This way he could make double the amount of kits available.
Last edited by a moderator:
thanks for the info. what is the expected power per channel at 8 ohm in this kit version? around 10W maybe? is the psu changed from +-28v to lower voltages? any diagram posted for this kit version?
best regards
I would think around 20Watts/channel. PSU should be the same (or similar to) as in the original schematic, standard PASS power supply using 3 CL-60 inrush current limiters. Look at the previous posts for a diagram I think it is very similar to original (which had 4 Vfets in each channel) with a pair VFETS removed. But please don't quote me for this!