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SlewMaster Project Boards

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#225
Current Status

xLoff - 2x IPS (CFA-XH), 2x 5P OPS - Delivered
mrsavage - 6x IPS (Wolverine) - Delivered

scalpel - 2x IPS (Symasui), 2x 2P OPS - Shipped - Postal Strike at Destination
arthur - 4x IPS (Wolverine) - Shipped
Bangla H - 2x IPS (CFA-XH), 2x IPS (Symasui), 2x 2P OPS - Shipped
vitalica - 2x IPS (Wolverine), 2x 5P OPS - Order Updated, Shipped

buzzforb - 2x IPS (CFA-XH), 2x 5P OPS - On Hold

Pre-order list for Spooky IPS and Mini OPS:

quan - 2x IPS (Wolverine), 2x IPS (Spooky), 2x Mini OPS - Request Acknowledged
mrsavage - 8x IPS (Spooky), 8x Mini OPS - Request Acknowledged
gwrskien - 4x IPS (Spooky), 6x Mini OPS - Request Acknowledged
tjencks - 2x IPS(Spooky), 5x Mini OPS - Request Acknowledged
arthur - 8x IPS (Spooky), 8x Mini OPS - Request Acknowledged
Jim Hamley - 4x IPS (Spooky), 4x Mini OPS - Request Acknowledged
vitalica - 2x IPS (Spooky), 2x Mini OPS - Request Acknowledged
jwilhelm - 2x IPS (Spooky), 2x Mini OPS - Request Acknowledged
 
#226
Bonus!

Board house made an error to our benefit - I requested HASL as usual and they inadvertently produced Spooky in a gold immersion finish. These are not yet in my possession since there were other boards in the order that aren't complete yet. The vendor just sent a picture showing their mistake for me to approve. It's not a great pic, but the finish is definitely in gold 😀. Naturally I did not request them to be made again in the correct finish.
 

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#228
Jason I need your help please

Here is these Cordel Ultimate Audio Amplifier from post 4465 posted by OS.
Schematics
I would love to try out these OPS circuit with the CFA-XH.
Can I hook these up with that IPS.
Please take a look and let me know.🙂
I already draw the layout 😀 , it would be great if I can build it knowing it will functioning properly.:scratch1:
One more question C17 - 39pF where I do connect, I can not figure it out.
Thank you Jason, I promise I will not bother anymore with circuit from other website!
Greetings Gabor

By the way the layout must be double checked even if we find out C17 where it goes.
If someone will decide to use it please be aware about that!
 

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#229
There should be no reason to think one of the SlewMaster IPSs wouldn't work with a different OPS.

Capacitor C17 goes to ground. The lifted audio ground. Did you look at the other schematics on the site? The IPS schematic that goes with the OPS you want to use held your answer 😉.

This is a group buy thread, so I'd prefer to keep on task here. The article says there is a thread for this amplifier, maybe there are some other useful resources there if you can find it. Thanks.
 
#232
Currently...

I'm hoping to be notified of shipment for the current order later in the week. Thanks for everyone being patient. A week long national holiday in China has made the wait for these seem very long. As per usual, I will do a QC build and if all is well folks will begin getting PMs with details. Oh, and thanks to everyone for letting me know their packages have been received so far.

arthur - 4x IPS (Wolverine) - Delivered
Bangla H - 2x IPS (CFA-XH), 2x IPS (Symasui), 2x 2P OPS - Delivered

scalpel - 2x IPS (Symasui), 2x 2P OPS - Shipped - Postal Strike at Destination
vitalica - 2x IPS (Wolverine), 2x 5P OPS - Order Updated, Shipped

buzzforb - 2x IPS (CFA-XH), 2x 5P OPS - Deleting from current list

Pre-order list for Spooky IPS and Mini OPS:

quan - 2x IPS (Wolverine), 2x IPS (Spooky), 2x Mini OPS - Request Acknowledged
mrsavage - 8x IPS (Spooky), 8x Mini OPS - Request Acknowledged
gwrskien - 4x IPS (Spooky), 6x Mini OPS - Request Acknowledged
tjencks - 2x IPS(Spooky), 5x Mini OPS - Request Acknowledged
arthur - 8x IPS (Spooky), 8x Mini OPS - Request Acknowledged
Jim Hamley - 4x IPS (Spooky), 4x Mini OPS - Request Acknowledged
vitalica - 2x IPS (Spooky), 2x Mini OPS - Request Acknowledged
jwilhelm - 2x IPS (Spooky), 2x Mini OPS - Request Acknowledged
Bangla H - 2x IPS (Spooky), 2x Mini OPS - Request Acknowledged
e_fortier - 2x IPS (Spooky), 2x Mini OPS - Request Acknowledged

Just so folks are aware, I have currently on hand:

4 pairs of the 5P OPS
5 pairs of the 2P OPS
7 pairs of Wolverine IPS
3 pairs of Symasui IPS
1 pair of CFA-XH IPS

If any of the above is of interest, feel free to request here or in a PM. Looking forward to checking out Spooky and the Mini OPS.

Thanks.
 
#234
John Wu said:
Hello Jason,

I would like to request:

1. CFA-XH x 2
2. NAD-S x 2
3. 5P OPS x2

Thanks a lot!



John
Click to expand...

Hi John,

I don't have the NAD-S IPS at this time, I actually had left it for last. I will very likely skip that version and work towards the latest iteration, the NAD-BH. This will be the first of the Braxandall SuperPair / Hawksfors Cascode IPSs. I suspect I'm a some time away form having finished artwork for it. Let me know if you want to sit tight and wait until some version of the NAD based design is available or if you would like the last pair of CFA-XH and the 5P OPS now and wait for the next IPS.
 
#235
jkuetemann said:
Hi John,

I don't have the NAD-S IPS at this time, I actually had left it for last. I will very likely skip that version and work towards the latest iteration, the NAD-BH. This will be the first of the Braxandall SuperPair / Hawksfors Cascode IPSs. I suspect I'm a some time away form having finished artwork for it. Let me know if you want to sit tight and wait until some version of the NAD based design is available or if you would like the last pair of CFA-XH and the 5P OPS now and wait for the next IPS.
Click to expand...

Hello Jason,

Please cancel NDA-S for me.
Revise my request as following:
1. CFA-XH x 2pcs
2. 5P OPS x 2pcs

Thanks a lot!



John
 
#236
My latest order is now on the move according to tracking information...

scalpel - 2x IPS (Symasui), 2x 2P OPS - Shipped - Postal Strike at Destination
vitalica - 2x IPS (Wolverine), 2x 5P OPS - Order Updated, Shipped
John Wu - 2x IPS (CFA-XH), 2x 5P OPS - Shipped


Pre-order list for Spooky IPS and Mini OPS:

quan - 2x IPS (Wolverine), 2x IPS (Spooky), 2x Mini OPS - Request Acknowledged
mrsavage - 8x IPS (Spooky), 8x Mini OPS - Request Acknowledged
gwrskien - 4x IPS (Spooky), 6x Mini OPS - Request Acknowledged
tjencks - 2x IPS(Spooky), 5x Mini OPS - Request Acknowledged
arthur - 8x IPS (Spooky), 8x Mini OPS - Request Acknowledged
Jim Hamley - 4x IPS (Spooky), 4x Mini OPS - Request Acknowledged
vitalica - 2x IPS (Spooky), 2x Mini OPS - Request Acknowledged
jwilhelm - 2x IPS (Spooky), 2x Mini OPS - Request Acknowledged
Bangla H - 2x IPS (Spooky), 2x Mini OPS - Request Acknowledged
e_fortier - 2x IPS (Spooky), 2x Mini OPS - Request Acknowledged

Just so folks are aware, I have currently on hand:

3 pairs of the 5P OPS
5 pairs of the 2P OPS
7 pairs of Wolverine IPS
3 pairs of Symasui IPS
 
#237
Baxandall Super-Pair / Hawksford Cascode IPSs
Click to expand...

Got 2 of these .... no NAD , too many revisions of this IPS.

Kypton-C is VSSA based with nV offset , 90db psrr , 4-8ppm.
Kypton-V is "blameless" based with the same specs.

These two beat ALL my past designs in ALL respects. PM me.
A very matched pair to evaluate CFA/VFA differences (rumble ?).

OS
 
#238
Boards finally arrived. I'll try to do a QC build this evening but with two boards to prove I might need two evenings. I'll post pictures when complete and begin to process of getting PMs out to those on the current list after I'm sure all is well.
 
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