Goldmund Wiki and build 2017

[chientechnical]

The 4700uF at 100V caps that are supplying or receiving the current to and from the loudspeakers are expected to do it by passing it all though four tiny copper track links from each solder pad. What's that going to do to the output impedance? It's not going to improve it. Might those tiny links evaporate with 8 amps to large less sensitive speakers?

New update at here with some small mod.

 

[chientechnical]

New upgrade version

All in one and full Option (from Mimesis to Telos) 😀

 

[chientechnical]

New small update 220uf_470uf for same as Telos 5000.

 

[chientechnical]

Detail more...

 

[chientechnical]

This is the highness images of full layout when view on GerberLogix.

 

[carlmart]

Has anyone tried multi-pin high quality round sockets for the input FET?

What I mean is something like this:

917-43-108-41-005000 Mill-Max | Mouser

I have seen 6-pin types too.

 

[Nelson Pass]

I don't have the 2N5565 but I do have the 2N5564 and 2N5566 which look like this (originals from the '80s):

I have a small drawer with old 2N5566's from the 70's-80's. All three of these
numbers are pretty much the same except differential temperature drift,
which is best in the 2N5564.

Also I have a bag of the NDP versions in dip package.

I don't see any reason not to use any of them, I did for years and they were
fine, but switched to Toshiba 2SK389 and 2SJ109.

 

[chientechnical]

I have a small drawer with old 2N5566's from the 70's-80's. All three of these
numbers are pretty much the same except differential temperature drift,
which is best in the 2N5564.

Also I have a bag of the NDP versions in dip package.

I don't see any reason not to use any of them, I did for years and they were
fine, but switched to Toshiba 2SK389 and 2SJ109.

I've done a reality check on the table and they run very particularly impressed with lyrical music my country. It has a special sound to me, it different to all other many amp heard and I love it.
I using Tektronic dual jfet, it's same 2N5911A. I will test on 2N556x later when I own them.

Video test: YouTube

 

[pcbd123]

I've done a reality check on the table and they run very particularly impressed with lyrical music my country. It has a special sound to me, it different to all other many amp heard and I love it.
I using Tektronic dual jfet, it's same 2N5911A. I will test on 2N556x later when I own them.

Video test: YouTube

Are you sure?

 

[chientechnical]

Are you sure?

I'm sure.

 

[erikovsky]

Has anyone tried multi-pin high quality round sockets for the input FET?

What I mean is something like this:

917-43-108-41-005000 Mill-Max | Mouser

I have seen 6-pin types too.

I've tried DIP-8 footprint on PCB. The advantages are:
1. Compatible with NPD556X
2. Compatible with 2N556X metal-can if you solder them on an adapter

 

[chientechnical]

some puctures on my project

 

[erikovsky]

I have a small drawer with old 2N5566's from the 70's-80's. All three of these
numbers are pretty much the same except differential temperature drift,
which is best in the 2N5564.

Also I have a bag of the NDP versions in dip package.

I don't see any reason not to use any of them, I did for years and they were
fine, but switched to Toshiba 2SK389 and 2SJ109.

Hi Mr. Pass,

Thank your for your comments. I was wondering if I could have chance to purchase several 2N5564 from you? It's really hard to get them from the market, though LSK389/489 are also good.

Best,

Erikovsky

 

[erikovsky]

some puctures on my project

Excellent layout! Is the metal shield grounded on the PCB?

 

[chientechnical]

Hi Mr. Pass,

Thank your for your comments. I was wondering if I could have chance to purchase several 2N5564 from you? It's really hard to get them from the market, though LSK389/489 are also good.

Best,

Erikovsky

I need too. Tks Mr.Pass.

 

[chientechnical]

Excellent layout! Is the metal shield grounded on the PCB?

Yes, GND plan on both top and bottom, and they are split into two separate and runs down to the point GND Total (Signal Star GND)

 

[chientechnical]

Excellent layout! Is the metal shield grounded on the PCB?

Oh sr. That are 'coper cover protect HF'.
Same as attack below. Them see very pro 😀

 

[pcbd123]

I have a small drawer with old 2N5566's from the 70's-80's. All three of these
numbers are pretty much the same except differential temperature drift,
which is best in the 2N5564.

Also I have a bag of the NDP versions in dip package.

I don't see any reason not to use any of them, I did for years and they were
fine, but switched to Toshiba 2SK389 and 2SJ109.

Can i purchase from you?

 

[chientechnical]

I am also doing M27 😀

 

[Nelson Pass]

I was wondering if I could have chance to purchase several 2N5564 from you?

I have the 2N5566. If you can get a group together and have someone in
the US to accept shipment, I will send some there.