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Old 7th April 2011, 01:02 PM   #631
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Yak yak yak, yeah, your Qouank amp is very pretty.
There !

The Q was not if Japamps have zig-zag metalbands inside (MPC ******-Up-Island is only one of several manufacturers).
BuTT, is you ever seen a commercial CRC with them, Nipp-On or Nipp-Off ?
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Old 7th April 2011, 06:06 PM   #632
Zen Mod is offline Zen Mod  Serbia
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yeah , but not in Ripp-Off audiophool gadgets , but in some pro stuff
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Old 8th April 2011, 12:08 AM   #633
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Your thoughts on this one lads.

I found an Australian Transformer Company, that makes this little number:

300VA Toroid Transformer

I was thinking of using 1 per channel of my F5 with the secondaries in parallel.

Any comments before I buy?

Cheers
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Old 8th April 2011, 12:36 AM   #634
Zen Mod is offline Zen Mod  Serbia
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one per channel is more than fine

but - secondaries in parallel , considering that there are exactly 2 of them ( as needed ) is no-no .....

maybe you need little more reading of F5 service manual ........ or few questions to ask ?

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Old 8th April 2011, 12:42 AM   #635
tinitus is offline tinitus  Europe
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Quote:
Originally Posted by thunk303 View Post

Any comments before I buy?

Cheers
Dean
obviously, yes

like, what do you mean per channel
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Old 8th April 2011, 01:03 AM   #636
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It did make sense when I wrote it, I swear. I'm not going to pretend I know what I'm doing, thats why I asked

I was under the impression that wiring the dual secondaries in parallel allowed twice the current delivery at the same voltage. Pass recommends a unit capable of delivery 10A peaks so.......... 1=8 ~ 2=16?

Heeeeeeelp.... I only need to buy the transformers and I can start testing / electrocuting myself ?!?!?!?

cheers
Dean

Last edited by thunk303; 8th April 2011 at 01:06 AM.
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Old 8th April 2011, 01:10 AM   #637
labjr is offline labjr  United States
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Doesn't he recommend that peak current for a stereo amp with one transformer? Thus one transformer per channel should be just fine. Just be sure the transformer you use will regulate well so your rail voltage doesn't sag.

Last edited by labjr; 8th April 2011 at 01:23 AM.
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Old 8th April 2011, 01:12 AM   #638
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Hey Tinitus, by per channel I meant 1 toroidal for left and 1 for right channel of amp. So dual mono I guess.

You guys are welcome to set me straight here, this is my first amp build and I don't have a degree in anything.

Dean
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Old 8th April 2011, 01:20 AM   #639
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you need two secondaries to have symmetric PSU

F5 , in stock form - with 2x18Vac secondaries , will have around +/-22V after rectifier and smoothing caps .

+/-22V means - symmetric PSU , so there is no way that you can use parallel anything .

Papa use ~ 300VA xformer common for both channels , but xformer is of decent quality .

dunno is linked one of same quality , but if you use 2 of them ,there is possibility that they will be fine , even if of lesser quality than FW stuff .

yes - buy them and enjoy .

but - you really need to learn some basics ( how to read schematic , for start) - not to please me or anyone , but to be able to make something ( with help ) , without hasta la vista babe ......
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Old 8th April 2011, 01:22 AM   #640
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"The power supply of the tested amplifier is +/-24 volts and should be rated at 6 amps
continuous duty, and more than 10 amps peak per channel".

I read this as a literal guide and was looking for a toroidal that delivered as such.

Again, I am happy to just use what works, but its going to be cheaper to buy from aus so i need to find the right device on there site.

https://www.tortech.com.au/

Cheers
Dean
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