Thanks Walter,
I´ve sent them an email. Let´s wait and see......
Nice amps you´ve got there! What are the specs?
William
I´ve sent them an email. Let´s wait and see......
Nice amps you´ve got there! What are the specs?
William
Well,
as usuall it is very difficult to buy things in Germany. No reply from Sedelbauer.....none at all.
Any other sources for low noise transformers?
William
as usuall it is very difficult to buy things in Germany. No reply from Sedelbauer.....none at all.
Any other sources for low noise transformers?
William
Hi William,
Schuro ( schuro.de) has transformers which look very good to me. Especially the V-RKT-MS-SW types. They also offer custom-made types for small additional charge.
illusionxx.
Schuro ( schuro.de) has transformers which look very good to me. Especially the V-RKT-MS-SW types. They also offer custom-made types for small additional charge.
illusionxx.
Hi William,
contact this Company but better call Mr.Mueller 0911-57545-18 he a expert for Transformers.I have used many of this Transformers from FG and no problems at all.
http://www.fg-elektronik.de/site_de/index.php?page=stromversorgungen
And forget Schuro your problems comming back sone !!
regards Walter
contact this Company but better call Mr.Mueller 0911-57545-18 he a expert for Transformers.I have used many of this Transformers from FG and no problems at all.
http://www.fg-elektronik.de/site_de/index.php?page=stromversorgungen
And forget Schuro your problems comming back sone !!
regards Walter
Schuro is a seller for Audioparts only - FG is a Transformer Company thats the difference! You thing Schuro can fix the noise problem from wuff-waffs xamps???? Your picture looks good and wuffwaff transformers looks good too.
regards walter
regards walter
Its easy to fix the problem.
You have 2 choices.
1. You send the transformer back to where you bought them and demand better ones, if possible.
2. You buy new ones.
You have 2 choices.
1. You send the transformer back to where you bought them and demand better ones, if possible.
2. You buy new ones.
Hi Promitheus,
it´s not easy to fix the problem:
1. sending them back is not really a sollution.
2. Buying new ones is, but wich ones? I´ve got the Schuro ones in my Aleph 5 and they are not completely quiet although they only have to deliver 170watts (They are 600VA too). If you ask people who sell transformers they will never give you a garantee that the transformers will be silent.
Walter,
I will try to call your Mr. Müller. Thanks!
William
it´s not easy to fix the problem:
1. sending them back is not really a sollution.
2. Buying new ones is, but wich ones? I´ve got the Schuro ones in my Aleph 5 and they are not completely quiet although they only have to deliver 170watts (They are 600VA too). If you ask people who sell transformers they will never give you a garantee that the transformers will be silent.
Walter,
I will try to call your Mr. Müller. Thanks!
William
Amplimo
Hi William,
I have used Amplimo 625 VA toroids in my Aleph 5 monoblocks and they are deadly quiet.
Just my 2 cents,
Fox
Hi William,
I have used Amplimo 625 VA toroids in my Aleph 5 monoblocks and they are deadly quiet.
Just my 2 cents,
Fox
Pass DIY Addict
Joined 2000
Paid Member
Hi William,
I have a question about the parts list that you posted and your Aleph-X. Which of the following is the correct cofiguration:
1) When using multiple FET in parallel for output, are R7 and R5 duplicated for each FET? Since you used 3 fets in parallel (total of 12 per channel) is each R5 (and R6s, and R40s, and R41s) a combination of 3 resistors, (thus for R5 I really need 9 x 1 ohm per channel), or
2) Are there three R5s (and R6s, and R40s, and R41s) so that each of the parallel mosfets gets its own, so each channel needs 3 x 1 ohm.
Sorry if this is confusing, still trying to understand the concept of paralleling my output devices.
Thanks,
Eric
I have a question about the parts list that you posted and your Aleph-X. Which of the following is the correct cofiguration:
1) When using multiple FET in parallel for output, are R7 and R5 duplicated for each FET? Since you used 3 fets in parallel (total of 12 per channel) is each R5 (and R6s, and R40s, and R41s) a combination of 3 resistors, (thus for R5 I really need 9 x 1 ohm per channel), or
2) Are there three R5s (and R6s, and R40s, and R41s) so that each of the parallel mosfets gets its own, so each channel needs 3 x 1 ohm.
Sorry if this is confusing, still trying to understand the concept of paralleling my output devices.
Thanks,
Eric
Pass DIY Addict
Joined 2000
Paid Member
Hmmm.... my question above doesn't sound very coherent now does it.... Perhaps a better way of asking this question is:
Does each mosfet get one bundle of 3x1 ohm resistors R6 or does each mosfet get only a single resistor?
Eric
Does each mosfet get one bundle of 3x1 ohm resistors R6 or does each mosfet get only a single resistor?
Eric
Hi Eric,
each Mosfet get´s his own source resistor of 0,33Ohms wich in my case are 3 paralleled 1 Ohm resistors. The output resistors are only used once.
Walter,
what do you mean by full power? Do you really use 1000VA?
Fox,
what power do you pull out off your 625VA transformers?
William
each Mosfet get´s his own source resistor of 0,33Ohms wich in my case are 3 paralleled 1 Ohm resistors. The output resistors are only used once.
Walter,
what do you mean by full power? Do you really use 1000VA?
Fox,
what power do you pull out off your 625VA transformers?
William
Hi Walter,
do you also use a bridge rectifier and caps?
These cause the very high paek current wich can saturate the toroid and cause noise.
William
do you also use a bridge rectifier and caps?
These cause the very high paek current wich can saturate the toroid and cause noise.
William
Yes including 220000uF per side no chokes and a 3R/2kw Resistors parallel to the Caps.Near 7,3 Amps running 2 hours nice test for the Transformers.I now the cycle from the current bring the Transformer to the llimitation and for the Diodes to.
Resistor load is nothing for Transformers.
regards walter
Resistor load is nothing for Transformers.
regards walter
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