Remote Toroidal Transformer !

thor61 · 12th November 2012, 05:16 AM

If building a F4 or F5 is it possible to construct the amplifier with all the components installed in the enclosure except the transformer ? What I would like to do by removing the transformer would allow me to use a smaller enclosure. The CRC and rectifier section would remain in the amplifier chassis.

GentryBa · 12th November 2012, 06:26 AM

hi thor,

yes, no problem! you can do that, why not?

best regards,
matthias

thor61 · 12th November 2012, 06:29 AM

Would there be any chance of noise or some type of interference ?

bobodioulasso · 12th November 2012, 06:37 AM

A better choice would be to keep the first two C of CRC near the transformer.
So, not carrying over the rectifier spikes.
Plus the ombilic will be part of R in CRC.

dazed2 · 12th November 2012, 05:25 PM

Hi, I'm planning on something similar but for a F5T V3.
In my case, I'm planning to have the entire power supply in a separate case, since I don't want the caps to be unnecessarily heated up by the class A amp.
However, I do realize that i probably have to add a cap or two in the amp case.
Is the recommended cap size after such a configuration about 10% of the amount of capacitance in the main power supply?

CharlieLaub · 12th November 2012, 05:46 PM

Quote:

Originally Posted by thor61

Would there be any chance of noise or some type of interference ?

If the power supply CRC arrangement is located along with the rest of the amplifier, it will filter noise (at least at higher frequencies) picked up on the feeds from the transformer secondary. I wouldn't be too worried about it.

I have used this approach before with amplifiers and PS built into small bookshelf loudspeakers. This left no room for the transformer, so I bought some 3 conductor power cable, terminated it with Neutrik PowerCon connectors, and located the transformer in a small enclosure several meters away. This worked pretty well and I can easily build another speaker and use the same transformer again just by disconnecting the PowerCon cable and plugging it into the new speaker.

-Charlie

Andersonix · 05:59 PM

There should be some amount of capacitance near the output stage...

Also, having an umbilical cord carrying AC is best avoided, but you could have transformer, rectifiers, and first cap bank in separate box?

12th November 2012, 05:16 AM	#1
thor61 diyAudio Member Join Date: Feb 2010	Remote Toroidal Transformer ! If building a F4 or F5 is it possible to construct the amplifier with all the components installed in the enclosure except the transformer ? What I would like to do by removing the transformer would allow me to use a smaller enclosure. The CRC and rectifier section would remain in the amplifier chassis.

12th November 2012, 05:47 PM	#7
Andersonix diyAudio Member Join Date: Jan 2004 Location: Silicon Valley	There should be some amount of capacitance near the output stage... Also, having an umbilical cord carrying AC is best avoided, but you could have transformer, rectifiers, and first cap bank in separate box? Last edited by Andersonix; 12th November 2012 at 05:59 PM.

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
toroidal transformer	Vrystaat	Power Supplies	2	20th October 2012 12:04 PM
toroidal transformer	JozzaG	Power Supplies	7	13th March 2010 07:16 AM
toroidal transformer	djdamix	Parts	3	15th June 2004 08:11 PM
Toroidal Transformer	sma	Solid State	3	3rd February 2004 07:55 PM

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read


	Please consider donating to help us continue to serve you. Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving

12th November 2012, 06:26 AM	#2
GentryBa diyAudio Member Join Date: Oct 2011 Location: Bavaria	hi thor, yes, no problem! you can do that, why not? best regards, matthias

12th November 2012, 06:29 AM	#3
thor61 diyAudio Member Join Date: Feb 2010	Would there be any chance of noise or some type of interference ?

12th November 2012, 06:37 AM	#4
bobodioulasso diyAudio Member Join Date: May 2008	A better choice would be to keep the first two C of CRC near the transformer. So, not carrying over the rectifier spikes. Plus the ombilic will be part of R in CRC.

12th November 2012, 05:25 PM	#5
dazed2 diyAudio Member Join Date: Jun 2010 Location: Toronto	Hi, I'm planning on something similar but for a F5T V3. In my case, I'm planning to have the entire power supply in a separate case, since I don't want the caps to be unnecessarily heated up by the class A amp. However, I do realize that i probably have to add a cap or two in the amp case. Is the recommended cap size after such a configuration about 10% of the amount of capacitance in the main power supply?