prototype preamplifier - Page 3

jonstanza · 17th October 2011, 01:12 PM

hi AndrewT

I thought this problem , but I chose this ( neoprene suport) because I had a good result.
The material located at this link:
Compre Soportes Antivibratorios Pasamuros Antivibraciones, VG-1 Richco VG-1 na RS Online e o receber em 24/48 horas.

greetings
jon

zxgravediggerxz · 19th October 2011, 12:00 AM

Jon,
You dont have any vents in the enclosure?!? Does it get hot?

jonstanza · 19th October 2011, 08:48 AM

Quote:

Originally Posted by zxgravediggerxz

Jon,
You dont have any vents in the enclosure?!? Does it get hot?

it is not necessary...

jonstanza · 8th April 2012, 09:52 AM

guys, here is the link of the project

stanza audio design

regards
jon

Leon08 · 8th April 2012, 01:36 PM

Very nice done, but I think there is a little market for such products mainly because of price but also because it's not innovative enough.Today people want some displays and microcontrollers to play with.

grhughes · 8th April 2012, 01:57 PM

Quote:

Originally Posted by Leon08

Very nice done, but I think there is a little market for such products mainly because of price but also because it's not innovative enough.Today people want some displays and microcontrollers to play with.

It's unfortuneate that too many of us are fascinated with a lite show and infected with the "isn't that neat" syndrone. Too many of us can't get our a$$ off the couch long enough to turn a knob. Another remote control to take it's place along side of the other three. GRH

hags · 21st April 2012, 01:31 AM

Impressive and incredible work!!!

From design, implementation and production, simply amazing.

Interesting choice in the 2N5566, it seems to be obsolete and long out of production whereas the 2SK170 is available from numerous reputable distributors.

The LSK170, which is an upgraded 2SK170 is also available.

Can you elaborate on your choice?

I'm guessing you could not use this with a source with any DC on it's output????

BowtoEd · 21st April 2012, 06:16 AM

I have to say this is impressive, especially if it's your first DIY project. My first DIY projects ended up in the trash because I was horrible at electronics construction. I've since improved but I still don't have friends with a CNC machine to custom-grind me a chassis. Oh, how sweet that would be.

I want to ask about the ratings of your power transformer. For preamplifier work (you did say this was a preamplifier, correct?) it looks a little big. If the transformer is a little big, what is the rationale in using it for a preamp, a circuit that doesn't draw very much current. Alternatively, does your preamp draw a lot of current? I have seen people say that an amplifying device is less sensitive to noise if the idle current is higher but I haven't read any factual data.

Impressive work. I haven't built a preamp yet although I need to. Right now I'm using a tube/MOSFET hybrid headphone amp as a preamp to feed my brand new transistor amp. I just finished the amp about 30 minutes ago and I'm giving it a test toast.

Ed

Gopher · 21st April 2012, 07:16 AM

Any schematics??

BowtoEd · 21st April 2012, 07:23 AM

If you're talking to me, I have one. I have to update it because it's been changed plenty of times between the prototyping and the final build. I think I'll post pictures and a schematic under the Amplifiers forum.

Ed

21st April 2012, 01:31 AM	#27
hags diyAudio Member Join Date: Nov 2004 Location: Chain o' Lakes	Impressive and incredible work!!! From design, implementation and production, simply amazing. Interesting choice in the 2N5566, it seems to be obsolete and long out of production whereas the 2SK170 is available from numerous reputable distributors. The LSK170, which is an upgraded 2SK170 is also available. Can you elaborate on your choice? I'm guessing you could not use this with a source with any DC on it's output???? __________________ "Some lures are designed to catch fish, others are designed to catch fisherman."

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17th October 2011, 01:12 PM	#21
jonstanza diyAudio Member Join Date: Sep 2010 Location: lisbon	hi AndrewT I thought this problem , but I chose this ( neoprene suport) because I had a good result. The material located at this link: Compre Soportes Antivibratorios Pasamuros Antivibraciones, VG-1 Richco VG-1 na RS Online e o receber em 24/48 horas. greetings jon

19th October 2011, 12:00 AM	#22
zxgravediggerxz diyAudio Member Join Date: Oct 2011	Jon, You dont have any vents in the enclosure?!? Does it get hot?

8th April 2012, 09:52 AM	#24
jonstanza diyAudio Member Join Date: Sep 2010 Location: lisbon	guys, here is the link of the project stanza audio design regards jon

8th April 2012, 01:36 PM	#25
Leon08 Banned Join Date: Sep 2010 Location: at Home	Very nice done, but I think there is a little market for such products mainly because of price but also because it's not innovative enough.Today people want some displays and microcontrollers to play with.

21st April 2012, 06:16 AM	#28
BowtoEd diyAudio Member Join Date: Apr 2012	I have to say this is impressive, especially if it's your first DIY project. My first DIY projects ended up in the trash because I was horrible at electronics construction. I've since improved but I still don't have friends with a CNC machine to custom-grind me a chassis. Oh, how sweet that would be. I want to ask about the ratings of your power transformer. For preamplifier work (you did say this was a preamplifier, correct?) it looks a little big. If the transformer is a little big, what is the rationale in using it for a preamp, a circuit that doesn't draw very much current. Alternatively, does your preamp draw a lot of current? I have seen people say that an amplifying device is less sensitive to noise if the idle current is higher but I haven't read any factual data. Impressive work. I haven't built a preamp yet although I need to. Right now I'm using a tube/MOSFET hybrid headphone amp as a preamp to feed my brand new transistor amp. I just finished the amp about 30 minutes ago and I'm giving it a test toast. Ed

21st April 2012, 07:16 AM	#29
Gopher diyAudio Member Join Date: Nov 2005 Location: UK	Any schematics??

21st April 2012, 07:23 AM	#30
BowtoEd diyAudio Member Join Date: Apr 2012	If you're talking to me, I have one. I have to update it because it's been changed plenty of times between the prototyping and the final build. I think I'll post pictures and a schematic under the Amplifiers forum. Ed

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