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Old 8th March 2005, 12:46 AM   #11
troystg is offline troystg  United States
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Default Re: Differece between Avel and Plitron?

Quote:
Originally posted by G4ME
This spring, I am looking to construct a chip amp, implementing some national chips...

I am looking at a 625VA with dual 25v secondaries.

My instincts say go with the cheaper on as its just a transformer, but I am just looking for different opinions on this, thanks.

625VA ?? How many chips did you have in mind? The LM3886 plays VERY well with 125VA, so 625VA will get you 5 HEAVILY powered chips..

Even if you where building a stereo pair of BPA-200's, 500VA would be sufficient.

I am a firm believer of over engineering, but since you mentioned you were "researching" I didn't want you to think 625VA was a requirement.
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Old 8th March 2005, 07:35 AM   #12
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Only kidding, KBK.

Of course i know the Canadian Brands.
In the early 90s i had a Classé DR3, for a short while.
Secondhand, the high current version, vhc, loved the layout with separate output boards of that power amplifier.
I am even aware that Canada has a large producer of big capacitor cans for amplifiers in Ontario.
Shoot, it is even my fav. brand.
However, i wonder how many are still Canadian owned ?
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Old 8th March 2005, 01:08 PM   #13
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Quote:
The LM3886 plays VERY well with 125VA, so 625VA will get you 5 HEAVILY powered chips..
Is this per channel? The reason I ask is because I was under the impression that a 250VA 25V+25V was the minimum I could get away with in the stereo version(1 PSU, 2 Amp).
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Old 8th March 2005, 01:28 PM   #14
K-amps is offline K-amps  United States
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Jacco,

Correction. Victoria sells 1kva for $138, and 1.5kVA is $180 or so.

Anyone hear about Rockna electronics? They make 1.5kVA toroids for Euro 73.

Anyone imprt them to US?
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Old 8th March 2005, 01:58 PM   #15
troystg is offline troystg  United States
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Quote:
Originally posted by The Shaman


Is this per channel? The reason I ask is because I was under the impression that a 250VA 25V+25V was the minimum I could get away with in the stereo version(1 PSU, 2 Amp).

You can get away with 80VA per chip if they are not to be used full volume for extended periods.

125VA will power one(1) chip to full potential under most circumstances.

I used Apex.jr's http://www.apexjr.com/images/NewTorid.JPG x-former for a stereo amp consisting of BrianGT's premium LM3875 amp kit. I used it on my B&W 805's and a friends Madisound Thor kit. That is 100VA shared between 2 chips.

EVERYONE remarked how the little kit had better bass than his 300wpc Adcom GFA-8500(?).
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Old 8th March 2005, 02:27 PM   #16
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Thanks for the info.. Hopefully Steve will have these in stock as I was not looking forward to spending ~$60 at P.E..
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Old 8th March 2005, 06:04 PM   #17
troystg is offline troystg  United States
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The 25 volt toroid from Steve.
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Old 8th March 2005, 07:36 PM   #18
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Quote:
Originally posted by K-amps
Victoria sells 1kva for $138, and 1.5kVA is $180 or so.
Thanks, K-amps.
Overhere they do $200 and +$300 for regular windings, having custom made swim across should be even more attractive.
I gathered that price levels will be rising due to increasing copper
and steel prices.

I saw the Rockna homepage some time ago, they probably just started in Romania.
I'm in for a couple of their 5000VA models, if the quality is ok.
I requested a quote on 5000VA toroids at a company that does those in the tulip flats, dont even ask.
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Old 8th March 2005, 08:27 PM   #19
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Let me know if Rockna delivers..... I need a few custom 1.5kVA's below $150 each So far only Rockna has those prices.... Maybe too good to be true perhaps?
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