Well put Chicco.
Asked NP about his feelings on this here where he also provided a link to his site with an improved front end. He also had good recommendations in general for the power supply.
I'm also experimenting with posting a link ....
I guess things work pretty much as you would expect (I hope!)
-Chris
Asked NP about his feelings on this here where he also provided a link to his site with an improved front end. He also had good recommendations in general for the power supply.
I'm also experimenting with posting a link ....
I guess things work pretty much as you would expect (I hope!)-Chris
Anatech,
I read Nelson's post in the link. I also like your idea of a low power Stasis amp design as you mentioned... A Mini Stasis!! One interesting thing is that if you compare the topology of the Stasis 1 with the NAK they are almost identical except for the use of the FETS. So it doesn't surprise me that Nelson would reccomend a later design Threshold front end for it. I would look forword to building a low power version of it to compare with the Mini-Aleph. ...say not more than 20 watts into 8 ohms..... Other wise I would probably just go ahead and clone the S-300 since it was a favorite amp that I once owned.
Mark
I read Nelson's post in the link. I also like your idea of a low power Stasis amp design as you mentioned... A Mini Stasis!! One interesting thing is that if you compare the topology of the Stasis 1 with the NAK they are almost identical except for the use of the FETS. So it doesn't surprise me that Nelson would reccomend a later design Threshold front end for it. I would look forword to building a low power version of it to compare with the Mini-Aleph. ...say not more than 20 watts into 8 ohms..... Other wise I would probably just go ahead and clone the S-300 since it was a favorite amp that I once owned.
Mark
Threshold SA4 ! 
Picture of an April 1989 test of the SA/4.
(sorry about my scribbling, i'm a nut)
6 times 31.000uF/75V CG capacitors.
2 700VA toroids
TO3 cans : 28 MJ15022/MJ15023 per channel
At the time i could not afford the SA/4, so i bought a Forte Audio.
A giant step from the S300 SeriesII
I don't think the Nak PA-7 was a bad amplifier, but at $3000 overhere in 1986 it had to much competition from far cheaper brands.
Same with the Nak CA-7 preamp, nice but at nearly 5 big bills nearly a quarter more than Thresholds Fet Nine that outperformed the CA-7 both on CD as Phono entrance.
(sorry about my scribbling, i'm a nut)
6 times 31.000uF/75V CG capacitors.
2 700VA toroids
TO3 cans : 28 MJ15022/MJ15023 per channel
At the time i could not afford the SA/4, so i bought a Forte Audio.
A giant step from the S300 SeriesII
I don't think the Nak PA-7 was a bad amplifier, but at $3000 overhere in 1986 it had to much competition from far cheaper brands.
Same with the Nak CA-7 preamp, nice but at nearly 5 big bills nearly a quarter more than Thresholds Fet Nine that outperformed the CA-7 both on CD as Phono entrance.
Attachments
Hi pinkmouse,
you have a lot of fun with your Krell clone, so it's easy for you to go another step forward!
I'm swamp with a metalwork on my ksa-50. But, if there are couple more interested, we my start with Brystons...
It will be great help if somone can send a picture of the pcb, i know that with better PCB layout Stuart Taylor managed to grately reduce distortion and noise on ST series. Driver and output transistors are easy to obtain, so... what we are waiting for?!?
chicco
you have a lot of fun with your Krell clone, so it's easy for you to go another step forward!
I'm swamp with a metalwork on my ksa-50. But, if there are couple more interested, we my start with Brystons...
It will be great help if somone can send a picture of the pcb, i know that with better PCB layout Stuart Taylor managed to grately reduce distortion and noise on ST series. Driver and output transistors are easy to obtain, so... what we are waiting for?!?
chicco
I know I an reviving an old thread here - but I have a quick question -
I know Sir Nelson Pass is somewhat synonymous with Class A amps, but was the PA-7 Class A or all Class AB? Can the Nak hold its own against a Pass Aleph or other more newer amp?
I am debating a purchase of a PA-7 or finishing the Pinkmouse Krell Clone KSA-50 for my Magnepan MGIIIa and was kind of hell bent on a class A amp purchase/build.
I have always known the Nak to be an awesome amp, as is the Krell Clone and I currently drive the Maggies with a UCD400AD (that I like very much), but always wanted the Nak and a nice Class A amp too...
No wonder why this hobby drives my wife nuts.
I know Sir Nelson Pass is somewhat synonymous with Class A amps, but was the PA-7 Class A or all Class AB? Can the Nak hold its own against a Pass Aleph or other more newer amp?
I am debating a purchase of a PA-7 or finishing the Pinkmouse Krell Clone KSA-50 for my Magnepan MGIIIa and was kind of hell bent on a class A amp purchase/build.
I have always known the Nak to be an awesome amp, as is the Krell Clone and I currently drive the Maggies with a UCD400AD (that I like very much), but always wanted the Nak and a nice Class A amp too...
No wonder why this hobby drives my wife nuts.
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