Author Topic: Review: The Satie Amplifier  (Read 248 times)

Offline schwarcw

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Review: The Satie Amplifier
« on: June 12, 2019, 07:08:38 PM »
Greetings!

Not enough room to post the review here.  What is the maximum amount of allowable characters?
« Last Edit: June 12, 2019, 07:13:53 PM by schwarcw »
Carl

Offline schwarcw

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Re: Review: The Satie Amplifier
« Reply #1 on: June 12, 2019, 07:13:00 PM »
The Forum is limiting my characters that I can post!!!!

 >:( >:( >:( >:( >:( >:( >:( >:( >:( >:( >:( >:( >:( >:( >:(
Carl

Offline Sir Thrift-a-Lot

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Re: Review: The Satie Amplifier
« Reply #2 on: June 12, 2019, 08:16:52 PM »
I don't know exactly what the problem is, but it seems to cut off after certain characters.   Apostrophes seem to be an issue.

Offline Sir Thrift-a-Lot

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Re: Review: The Satie Amplifier
« Reply #3 on: June 12, 2019, 08:17:24 PM »
Though it handled that one just fine.

Offline Sir Thrift-a-Lot

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Re: Review: The Satie Amplifier
« Reply #4 on: June 12, 2019, 08:18:02 PM »
That picture is great though.   Beefy transformer.

Offline scorpio333

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Re: Review: The Satie Amplifier
« Reply #5 on: June 12, 2019, 08:42:03 PM »
For me, posting on a phone gets cut off.

Amp looks great, love to hear more about it.

Offline vpgh

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Re: Review: The Satie Amplifier
« Reply #6 on: June 12, 2019, 09:57:40 PM »
For me, posting on a phone gets cut off.

Amp looks great, love to hear more about it.
Satie is a product of  my attempts to get close to Audio Grail. It

Offline Sir Thrift-a-Lot

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Re: Review: The Satie Amplifier
« Reply #7 on: June 12, 2019, 10:06:51 PM »
For me, posting on a phone gets cut off.

Amp looks great, love to hear more about it.
Satie is a product of  my attempts to get close to Audio Grail. It

LOL, was that the board or are you just trolling us?

Offline vpgh

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Re: Review: The Satie Amplifier
« Reply #8 on: June 12, 2019, 10:12:57 PM »
I had same issue last time posting - forum cuts the message.

Offline vpgh

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Re: Review: The Satie Amplifier
« Reply #9 on: June 12, 2019, 10:13:31 PM »
It's hybrid of tube voltage amplification section and Solid State (SS) unity gain buffer as output stage. The main point of design concept was to exclude the general negative feedback in audio path. However, you can find some similar realization in Anthem (partial match- uses NFB), Counterpoint, LAZARUS, Luxman (partial match), MOSCODE, Onkyo (partial match) amplifiers etc.
The trick and main difference is design of SS buffer - to reduce the heat dissipation, size and weight of the heatsinks and quantity of parallel output transistors. Most of the critical listeners noticed that large amount of parallel transistors in output stage. This may reduce some clarity in the voices and "air" as compared to the couple output devices. The other point is using Lateral MOSFET in output stage (Not the whole SS buffer) instead more affordable HEXFET MOSFET that Nelson Pass loves to use in his designs. Experienced listeners noticed that PASS amplifiers little bit "harsh" on the top-end.
The closest analogy in automotive design: to get more power from the engine we can increase size or number of cylinders, OR put the turbocharger in the motor. The 2nd way helps to get more power and keep the fuel consumption and weight of engine in acceptable range.

Offline vpgh

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Re: Review: The Satie Amplifier
« Reply #10 on: June 12, 2019, 10:14:14 PM »
The most important part of any
« Last Edit: June 12, 2019, 10:16:36 PM by vpgh »

Offline Sir Thrift-a-Lot

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Re: Review: The Satie Amplifier
« Reply #11 on: June 12, 2019, 10:15:09 PM »
I had same issue last time posting - forum cuts the message.

That would have been very well played if it was on purpose.

Offline vpgh

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Re: Review: The Satie Amplifier
« Reply #12 on: June 12, 2019, 10:17:22 PM »
I had same issue last time posting - forum cuts the message.

That would have been very well played if it was on purpose.
Unfortunately, seems like a SW issue for me.

Offline vpgh

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Re: Review: The Satie Amplifier
« Reply #13 on: June 12, 2019, 10:18:39 PM »
The most important part of any "engine" is a power supply. I use the linear power supply with 2 separate circuits for tube and SS stages/ The oversized (625VA) toroidal transformer utilizes an array of high-capacity capacitors with Schottky rectifier and soft-start for SS output stage and HV regulated PSU for tube's section.
« Last Edit: June 12, 2019, 10:21:55 PM by vpgh »

Offline vpgh

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Re: Review: The Satie Amplifier
« Reply #14 on: June 12, 2019, 10:26:51 PM »
I put ECC85 (6AQ8) tubes to this design due to I personally love the  sound signature and I can achieve the gain of 29 dB with this kind of tube. I prefer the "voice" of NOS RFT ECC85 since my 1st usage in 2007, but I put other ECC85 tubes in this amp. However, I can swap ECC85 (6AQ8) to 6BQ7 as more affordable substitution, or some 4 digit "military" grade tubes, or 6CG7 with lose of input sensitivity. Choice ones for your ears! 

Sorry, no 12AX7 in this design
« Last Edit: June 12, 2019, 10:31:49 PM by vpgh »