Balanced F5 question

[EUVL]

Interest in SumR 500VA 2x15V Transformer for F5X (ca. 100USD per Tx):

The Team 4 +
AndrewT 2
.....
.....

Please fill in accordingly.


Patrick

.

[Horio]

Interest in SumR 500VA 2x15V Transformer for F5X (ca. 100USD per Tx):

The Team 4 +
AndrewT 2
Horio 2
.....
.....

Please fill in accordingly.


Patrick

[EUVL]

Pls note that 1x 500VA will be sufficient for 1 channel F5X only or 2 channel F5 standard.
Price indication only and not including postage.

Patrick

[Horio]

Originally Posted by EUVL

Pls note that 1x 500VA will be sufficient for 1 channel F5X only or 2 channel F5 standard.
Price indication only and not including postage.

Patrick

I was wondering about that. 500VA seemed low for 2 channels.

Thanks Patrick.

[pchw]

The Team 4 +
AndrewT 2
Horio 2
pchw 2
.....
.....

[EUVL]

So we'll go and ask for 10 pieces.

I think that'll do for the first round. Some discount.
Not too much GB effort to divert the team from development work.


Patrick

[EUVL]

For those who wants to support their local industry, here is an exemplary specification.


Patrick

[Melon Head]

Thanks for the specs.
I will get a quote from harbuch

[jameshillj]

Please pardon my ignorance here, still catching up on the thread - why is a 500VA, 16A txr required for each channel?
If custom made, would 2 X 300, 400, etc VA units or one larger single unit, if space permits, do the job?

I generally use the EI core trannies, but are much larger (and expensive) than the T's.

[EUVL]

Total dissipation per channel is 128W. Dropout loss in regulator or CRC 24W. Diode loss 16W. Min power requirement per channel = 168W. Factor of 3 to allow for high ripple current of Class A amp (see NP articles) = 504VA. Actually 0.8% undersized.

http://www.firstwatt.com/pdf/art_power_supplies.pdf

Case design has 350mm overall width. Conrad heatsinks 2x48mm. Some room for PCBs, wiring, etc, 2x50mm. Maximum width (diameter) of Tx = 154mm. Fits most commercially available 500VA Tx with about 5mm space left both sides.

Of course you can make your own decisions. That's why I said exemplary.


Patrick

.