[h=Introduction]%1[/h]
These are the resources for the Slewmaster series of builds
from ostripper. They are divided into two distinct threads, shown as:
[h=Design thread, Slewmaster - CFA vs. VFA "Rumble"]%2[/h]
LINK
Here are the builds and related post numbers provided by Thimios:
]Nad (CFA)look at post# 832,963,967.988,989,1005
Spooky (VFA)#1247,1267,1292,1301
Gnome v1.3(CFA)#1455,1467,1485,1500,1516,1531,1538,1567
Symasui (VFA)#1642,1671,1672,1673
Cfa ver.1.2(CFA) #1754,1756,1757,1784
Cfa v1.3(CFA) #2976
Wolverine((VFA) ver1-c #3543,3564,3637,2279
Kypton C (CFA)#4797,4765
Kypton V(VFA) #5261,5282
Eyessee (CFA)#5521
Kypton ND(CFA) #6830,6850,6888
Bimo-Ostriper Symetry(VFA) #8064,8066,8091
Infidel an unsuccessful IPS #5385
Ostriper schematic list look at post # 1
[h= Build thread, Slewmaster Builds ]%2[/h]
LINK
It might be time to put the controversy to "rest'.
The only real way is to actually make some amplifiers.
The best way to start (I might be wrong) , is to assume that the simulator lies (slightly).
RNmarsh commented that many of his simulated (CFA) amps performed
much better when actually built and I have had VFA's that did not perform
as simulated.
DIYAudio allows first post editing, so ALL current work is posted there!
[h=IPS - Input Stage]%2[/h]
IPS - Separate small PCB's can plug in to the OPS. All IPS's will run off any supply the OPS provides. CFA and VFA IPS's can be interchanged ... as the operating voltages and currents are standardized.
[h=OPS - Output Stage]%2[/h]
OPS - Each Amp is composed of:
Output Stage
Capacitance multiplier (simple regulator).
The printed circuit boards (PCBs) are available as follows:
border="1"
|
|
|-
|
|
|-
|
|
|-
|
|
With premium output devices this could be nearly doubled.
Triple output stage topology is used, as well as a 2 device compound thermal
compensation circuit. Similar to the Harmon /kardon 680 -990 series
integrated amplifiers.
[h= CFA - Current Feedback Amp]%3[/h]
[h= VFA - Voltage Feedback Amp]%3[/h]
Below is the "lineup" .....
1-3. SLEWMASTER OPS's (V1.2 -3 of them) the "baby" , "master" and monster"
....3 power levels of EF3 goodness. POST(s) #500 , 502 , 504
4. NAD-S-v1.2 IPS (CFA) - Based on the excellent "NX" with servo DC and the Hawksford Cascode. Member NAF says "it sings" gracefully. Post #518
5. Wolverine-V1.2 IPS (VFA) - "blameless" based with PPM ultra low distortion.
Next logical refinement after the "Badger". POST #599
6. CFA-X and "XH" (CFA , of course) - Similar to the "VSSA/peeceebee" , a very simple amp usable
with the "slew" OPS's. POST #701 -perfected (684 is an error - do NOT use ! )
Edit ... post #2739 is the official schema for the "new" version for CFA-X "H" (hawksford powered).
7. Spookyamp (VFA) Based on the 2500$ Harmon kardon 990 receiver ... uses the classic
Georgia Tech "Leach" topology. Post #803 V1.1 ...
8. Symasui (VFA) - the DIYA "symasym" on steroids post #1628 , almost forgot this one .... Post #1628
9. Kypton-C (CFA) - better CFA-X with servo and super-pair. Post # 4729.
10. Kypton -V (VFA) "classic sansui" 3 stage IPS. Post # 5384.
11. EYESEE (CFA) - IC based amp .....post #4944
12. "Infidel" V2 (VFA) - Fast ... Fast !! with kV slew capability. - #5753
More to come ...
ENJOY!
OS
Slewmaster is based on a common core of amplifier sections.
[h=Slewmaster Boards Listed Here]%1[/h]
[h=Amp Boards]%1[/h]
Each post ,(#500,502,504) has the unified 2p/3p/5p schema in the
attached zip file. First post lists these posts ....
[h=Input Board]%1[/h]
[h=Output Board]%1[/h]
The latest version of the output board is being designed by OS and
laid out by JKuetemann as this is being posted. LINK
Features of the design include either BJT or FET output devices.
and it will work with up to five matched output pairs.
Below is the recommended location for for using the
output devices.
5-----5
4-----4
3-----3
2-----2
1-----1
2 pair
3 pair
4 pair
5 pair
[h=Protection Board]%1[/h]
These sections are contained
[h=Bill of Materials - BOM]%1[/h]
The BOM has the list of parts you need to buy.
Here is an excel spreadsheet with the various
build parts on it. Across the bottom of the the
page are separate folders for each build type.
Let someone know if there is a problem as
this is a group process, group build, trouble
shooting etc. There are a lot of folks that
will help you out if you have a problem.
Good luck Jim, this thread will self destruct
in five seconds.
These are the resources for the Slewmaster series of builds
from ostripper. They are divided into two distinct threads, shown as:
[h=Design thread, Slewmaster - CFA vs. VFA "Rumble"]%2[/h]
LINK
Here are the builds and related post numbers provided by Thimios:
]Nad (CFA)look at post# 832,963,967.988,989,1005
Spooky (VFA)#1247,1267,1292,1301
Gnome v1.3(CFA)#1455,1467,1485,1500,1516,1531,1538,1567
Symasui (VFA)#1642,1671,1672,1673
Cfa ver.1.2(CFA) #1754,1756,1757,1784
Cfa v1.3(CFA) #2976
Wolverine((VFA) ver1-c #3543,3564,3637,2279
Kypton C (CFA)#4797,4765
Kypton V(VFA) #5261,5282
Eyessee (CFA)#5521
Kypton ND(CFA) #6830,6850,6888
Bimo-Ostriper Symetry(VFA) #8064,8066,8091
Infidel an unsuccessful IPS #5385
Ostriper schematic list look at post # 1
[h= Build thread, Slewmaster Builds ]%2[/h]
LINK
It might be time to put the controversy to "rest'.
The only real way is to actually make some amplifiers.
The best way to start (I might be wrong) , is to assume that the simulator lies (slightly).
RNmarsh commented that many of his simulated (CFA) amps performed
much better when actually built and I have had VFA's that did not perform
as simulated.
DIYAudio allows first post editing, so ALL current work is posted there!
[h=IPS - Input Stage]%2[/h]
IPS - Separate small PCB's can plug in to the OPS. All IPS's will run off any supply the OPS provides. CFA and VFA IPS's can be interchanged ... as the operating voltages and currents are standardized.
[h=OPS - Output Stage]%2[/h]
OPS - Each Amp is composed of:
Output Stage
Capacitance multiplier (simple regulator).
The printed circuit boards (PCBs) are available as follows:
|
Pair
|
Power into 8 ohms
|-
|
2 pair
|
70 watts
|-
|
3 pair
|
150 watts
|-
|
5 pair
|
250 watts
With premium output devices this could be nearly doubled.
Triple output stage topology is used, as well as a 2 device compound thermal
compensation circuit. Similar to the Harmon /kardon 680 -990 series
integrated amplifiers.
[h= CFA - Current Feedback Amp]%3[/h]
[h= VFA - Voltage Feedback Amp]%3[/h]
Below is the "lineup" .....
1-3. SLEWMASTER OPS's (V1.2 -3 of them) the "baby" , "master" and monster"
....3 power levels of EF3 goodness. POST(s) #500 , 502 , 504
4. NAD-S-v1.2 IPS (CFA) - Based on the excellent "NX" with servo DC and the Hawksford Cascode. Member NAF says "it sings" gracefully. Post #518
5. Wolverine-V1.2 IPS (VFA) - "blameless" based with PPM ultra low distortion.
Next logical refinement after the "Badger". POST #599
6. CFA-X and "XH" (CFA , of course) - Similar to the "VSSA/peeceebee" , a very simple amp usable
with the "slew" OPS's. POST #701 -perfected (684 is an error - do NOT use ! )
Edit ... post #2739 is the official schema for the "new" version for CFA-X "H" (hawksford powered).
7. Spookyamp (VFA) Based on the 2500$ Harmon kardon 990 receiver ... uses the classic
Georgia Tech "Leach" topology. Post #803 V1.1 ...
8. Symasui (VFA) - the DIYA "symasym" on steroids post #1628 , almost forgot this one .... Post #1628
9. Kypton-C (CFA) - better CFA-X with servo and super-pair. Post # 4729.
10. Kypton -V (VFA) "classic sansui" 3 stage IPS. Post # 5384.
11. EYESEE (CFA) - IC based amp .....post #4944
12. "Infidel" V2 (VFA) - Fast ... Fast !! with kV slew capability. - #5753
More to come ...
ENJOY!
OS
Slewmaster is based on a common core of amplifier sections.
[h=Slewmaster Boards Listed Here]%1[/h]
[h=Amp Boards]%1[/h]
Each post ,(#500,502,504) has the unified 2p/3p/5p schema in the
attached zip file. First post lists these posts ....
[h=Input Board]%1[/h]
[h=Output Board]%1[/h]
The latest version of the output board is being designed by OS and
laid out by JKuetemann as this is being posted. LINK
Features of the design include either BJT or FET output devices.
and it will work with up to five matched output pairs.
Below is the recommended location for for using the
output devices.
5-----5
4-----4
3-----3
2-----2
1-----1
2 pair
3 pair
4 pair
5 pair
[h=Protection Board]%1[/h]
These sections are contained
[h=Bill of Materials - BOM]%1[/h]
The BOM has the list of parts you need to buy.
Here is an excel spreadsheet with the various
build parts on it. Across the bottom of the the
page are separate folders for each build type.
Let someone know if there is a problem as
this is a group process, group build, trouble
shooting etc. There are a lot of folks that
will help you out if you have a problem.
Good luck Jim, this thread will self destruct
in five seconds.
So I'm trying to organize this for everyone. If you have ideas please leave them here.
This should help everyone.
I mean if five people have to search 5 hours each for a build parts
in the threads, well that is 25 hours we could use to be doing building
instead of just searching around.
I would ask please post ideas here etc, because a wiki is pretty easy
to screw up we don't want to invoke Murphy and his laws. : )
Post the links you find for BOMs parts, Ideas etc here and we
can then copy them over to the WIKI and make that better.
That beats sending.
This should help everyone.
I mean if five people have to search 5 hours each for a build parts
in the threads, well that is 25 hours we could use to be doing building
instead of just searching around.
I would ask please post ideas here etc, because a wiki is pretty easy
to screw up we don't want to invoke Murphy and his laws. : )
Post the links you find for BOMs parts, Ideas etc here and we
can then copy them over to the WIKI and make that better.
That beats sending.
Last edited:
Finding Links for This Wiki
Hi when you find a helpful post in the forums
you can link it over in the wiki.
For right now this would be the safest way to do it.
If you know a better way I'm all ears.
Go back to the helpful post.
Highlight or select the post number.
Once that is selected, go up to the URL of your browser
and copy the URL.
Then, come back here to WIKI: LIST: Slewmaster Resources
THEN
Select Discussions Tab
It's like a forum thread within the wiki
leave a comment about what you found
what it is post number or what have you
then post the link.
That will take anyone to that post.
We can then go through it and find all the good
stuff we need and put it in the wiki.
Hi when you find a helpful post in the forums
you can link it over in the wiki.
For right now this would be the safest way to do it.
If you know a better way I'm all ears.
Go back to the helpful post.
Highlight or select the post number.
Once that is selected, go up to the URL of your browser
and copy the URL.
Then, come back here to WIKI: LIST: Slewmaster Resources
THEN
Select Discussions Tab
It's like a forum thread within the wiki
leave a comment about what you found
what it is post number or what have you
then post the link.
That will take anyone to that post.
We can then go through it and find all the good
stuff we need and put it in the wiki.
- Status
- Not open for further replies.