The Very Best Amplifier I Have Ever Heard!!!!

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#1,201
Liliya said:
The old Mimesis amplifiers had a very magical sound and that is what this entire thread is about. Cloning the old Goldmund Mimesis 9.2, Mimesis 3, and Mimesis 6 amplifiers. The PCB should follow the old design/schematic. As it stands, T6 is connected correctly. If any potential builders want to use an A2 module's configuration, it's up to them to make the necessary modifications on the PCB.
Eivind Stillingen
Click to expand...

Sounds interesting! Keep us posted with your progress and also some pictures if you don't mind.

Cheers,

Fred
 
#1,202
bigpanda said:
Hi Tony,

Do we have to get 50x50x6? If we have 38x38x6, we still have 32mm of surface to mount the TO-3. That should be good enough. The path going from the TO-3 to the actual heatsink is shorter, would that be better?
Click to expand...

if you have 38x38x36 use it...i was thinking of the 50x50x6 becasue it is easier to finds here....anyways, one side will need to be machined off to get about 38mm....
 
#1,206
Bigpanda/Alex

I think you can answer this: PCB are ready for a relay from Panasonic: JTN1S-PA-F-DC24V: http://media.digikey.com/pdf/Catalog Drawings/Relays/JT-N-JT-BOARD2.jpg.

Omron do have a relay that, as far as I could see, are physically identical (not electrical) :https://www1.elfa.se/data1/wwwroot/assets/datasheets/03700341.pdf

Looking at both relays from below, their legs are identical, but both have one leg "to much" to fit into the PCB (the one on the top, on the left hand)

Can you confirm that the solution in this case is to cut the "excess" leg?

I have bought two of this Omron relay and can confirm that if I cut this one leg, they fit very well into the PCB.

My experience with relays is very limited, therefore this question, which might be of interest to others who are looking for the appropriate output
relay.

Eivind Stillingen
 
#1,214
Tony said:
I think everyone's goal should not be to kill the messenger, he's already made up his mind and it's unlikely any rational thought will convince him otherwise, but to prevent the uncontested spread of misinformation.
Click to expand...

<tangent>
@Tony - Your .sig doesn't make any sense at all. If everyone's goal should be to prevent the uncontested spread of misinformation then, clearly, the most efficient method of doing so is for everyone to kill ALL of the messengers.

PS - Did you know that "don't kill the messager" is merely the result of a very successful marketing campaign by the Guild of Messengers? (okay, I made that up, but I bet you that it's true). 🙂

But in defense of the traditional messenger, he never really had a choice. His chance of being killed for refusing to deliver the message was 100%. His chance of being killed for delivering the message was somewhat less than that and generally depended upon both the content of the message and the mood of the recipient. 🙂
</tangent>
 
#1,217
Hi Liliya,
If you look at the spec sheet for the omron, you will see that there are 2 models of the G8P ("Note: Pin #4 is omitted on G8P-1A4P/1A2P") has the pin omitted. The pin is a NC (normal close) pin for the contact which can be chipped off in our application. You might find it quite difficult to do so because this is quite strong. It is better that you use the 1A4P model (for Omron). The coil pad holes are slightly off position but you should be able to do it w/o too much problem, just do it with more attention.

Hi Harolda,
There is a schematic in the 2 links in Post #1213 and also more detail on the pcbs, download and see for youself. I still have more than 15 pairs of boards.
 
#1,218
Tony said:
hi, i did not read the entire thread, can you post links please? or can you elaborate please, any suggestions for a workaround? thanks...
Click to expand...

When the front end power supply voltage decrease, the current
through the input cascode biasing resistors decrease as well,
but then, since it s connected in parralel with the input stage,
the missing current will be transfered to the said input stage
since the current source has constant current, leading to
higher current in the differential and consequently in the VAS,
which end increasing the power devices bias current...

That s why Goldmund made a separate more or less stable
power supply for the front end,
as it would be problematic to have a single PS for both
front end and power stage...
 
#1,220
dfidler said:
<tangent>
@Tony - Your .sig doesn't make any sense at all. If everyone's goal should be to prevent the uncontested spread of misinformation then, clearly, the most efficient method of doing so is for everyone to kill ALL of the messengers.

PS - Did you know that "don't kill the messager" is merely the result of a very successful marketing campaign by the Guild of Messengers? (okay, I made that up, but I bet you that it's true). 🙂

But in defense of the traditional messenger, he never really had a choice. His chance of being killed for refusing to deliver the message was 100%. His chance of being killed for delivering the message was somewhat less than that and generally depended upon both the content of the message and the mood of the recipient. 🙂
</tangent>
Click to expand...

you off topic....😀😉

anyways, that comment was taken off the thread wherein the 2 camps were sparring.....i somehow kinda relate.....😀😉
 
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