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Old 28th September 2017, 07:30 AM   #161
AndrewT is offline AndrewT  Scotland
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Quote:
Originally Posted by Jet02 View Post
In the past , i studied and built many sort of V-Mos amplifier, so I know very well the original Crescendo and i have enjoyed a long time the mini-crescendo too. About high frequency, it is easy to find where to damp it it without altering the audio signal path.
Sorry for my bad English , i am French and i live near Paris.
Later i shall try to post a picture to show a good way you to cure HF issue.
How is it possible to send a picture in this forum?
Quote:
Originally Posted by Jet02 View Post
I found how to post with documents...!...
How is it possible to send a picture in this forum? Just use "go avanced" instead quick reply option...
I shall use it later to show a good an d easy way to cure HF.....
Best regards!
Attach you pics and other docs
How to attach images to your posts.
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Old 28th September 2017, 06:32 PM   #162
overall feedback is offline overall feedback  Croatia
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And only minor change, not three bridges but only two. That would be final version. Except somebody rise up with good ideas
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Old 25th October 2017, 09:38 AM   #163
jamesfeline is offline jamesfeline  United Kingdom
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Hello .. so has anyone actually made this version with the PCB layout described ?
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Old 30th November 2017, 11:31 AM   #164
fencki is offline fencki  Austria
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i am also interested if anybody realized the new pcbs...
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Old 4th December 2017, 04:09 AM   #165
holger1 is offline holger1  Germany
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Quote:
Originally Posted by danne_linkinpar View Post
I have problem whith oscillations in my Crecendo 250W mosfet, it oscillations is about 4 Mhz??
Sorry for the late answer, but the problem are the resistors between the source connectors and the speaker connector. If the joint between the source connectors and the PCB is not good enough, you have additional resistors here, which will cause instability. Secondly, consider a low pass filter on the input. 680 pF and 3.3 kOhm are working fine.

Best wishes, Holger
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Old 4th January 2018, 11:14 AM   #166
pserci is offline pserci  Italy
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Default Crescendo Realization with FMMECh PCB for TO3

I want to share my recent rebuilding of my crescendo, with the TO3 FMmech boards. For the moment, all is mounted in a temporary wood board, but i'm in the way to choose a decent aluminium enclosure to finish this project. Absolutely no oscillations at any load, dead silent and well performing wiht my stereo set!!
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Old 4th January 2018, 11:31 AM   #167
AndrewT is offline AndrewT  Scotland
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That's a good way to build.
Find out what space/volume you need after folding all the component assemblies into a working arrangement.
And then buy a Chassis/Enclosure to suit.
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Old 5th February 2018, 04:23 PM   #168
scafas is offline scafas  Italy
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Default pcb

Does anyone care to buy the pcb in the original version of the 1982 amplifier? I can ship 2pcb for the price of 30 euros(ship incluse).
if interested I can make a small production of 20pcs.
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Old 5th February 2018, 04:25 PM   #169
Kay Pirinha is offline Kay Pirinha  Germany
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You know that the original ELEKTOR PCBs had 70m copper layer?

Best regards!
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Old 5th February 2018, 04:27 PM   #170
scafas is offline scafas  Italy
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i can do it with 70um , no problem
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