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Old 29th January 2010, 06:48 PM   #991
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Thanks Peter.
Just sent you an email.

The speaker impedance loads will be appx 4 ohms each. Parts Express has the 330V 25+25. Will this be acceptable? I dont see any 18+18 or 22+22...
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Old 29th January 2010, 07:38 PM   #992
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25+25 will work, although with 4ohm speakers lower voltage is really recommended.
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Old 30th January 2010, 02:53 PM   #993
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Quote:
Originally Posted by Peter Daniel View Post
25+25 will work, although with 4ohm speakers lower voltage is really recommended.
The closest that Avel makes are these two:

330VA 25+25 (secondary current 6.60A)
250VA 18+18 (secondary current 6.94A)

Unless you know of another supplier that carries something better, which of those two would be more appropriate ?
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Old 30th January 2010, 03:36 PM   #994
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I would go with 330A 25+25
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Old 3rd February 2010, 06:07 PM   #995
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Looks like they are available from AnTek... 400VA 18v+18v

eBay seller "johnango"

For everyone elses reference, its AnTek model number AN-4218. Looks like I'll be ordering those since they would be the better fit.

The eBay link shows the tested specs as well...
18+18V 400VA Toroid Transformer DIY HiFi Audio Amp 4218 - eBay (item 370327724279 end time Feb-05-10 12:56:59 PST)


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Old 4th February 2010, 12:25 AM   #996
hayenc is offline hayenc  United States
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At one point, John was offering diyaudio members a discount below the eBay price if you ordered through his website. This was for the F5. Might send him an email before buying through eBay.
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Old 4th February 2010, 07:03 PM   #997
Wavne is offline Wavne  Canada
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Hey Everyone;
I'm new here. I just ordered the 4780 Dual Mono Kit from Peter. While hunting for transformers I found these guys..Primrose Audio. Has anyone tried these?

I'm planning on getting One and run the kit in stereo until I can afford a second, then run in dual mono. I have a price of $125 CDN after tax and shipping for a single primary 300vac 22+22 secondaries.

regards,

Wayne
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Old 5th February 2010, 03:24 AM   #998
j.leger is offline j.leger  Canada
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Nice find. I wish I had found this outfit a long time ago. Seems a little pricy but nice.
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Old 5th February 2010, 11:56 AM   #999
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Quote:
Originally Posted by Wavne View Post
Hey Everyone;
I'm new here. I just ordered the 4780 Dual Mono Kit from Peter. While hunting for transformers I found these guys..Primrose Audio. Has anyone tried these?

I'm planning on getting One and run the kit in stereo until I can afford a second, then run in dual mono. I have a price of $125 CDN after tax and shipping for a single primary 300vac 22+22 secondaries.

regards,

Wayne
You can ask Richard if he have surplus stock. I ordered from him two 300va 22-22 for 40$ each about two month ago. Check also for Antek, for more competitive price.
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Old 5th February 2010, 02:57 PM   #1000
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Regarding isolating the chip from the chassis/chassis mounted heatsink...The kits come with a strip of insualting foil. Do you need to use heatsink thermal compound on both sides of this foil (between foil and chip, and between foil and heatsink) ?

I read through the thread but couldnt find a clear answer on isolating the chip. Thank you.
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