65 + 65VAC 1kVA Toroidal Transformer

gengis · 27th May 2005, 12:34 AM

Anyone interest in getting some Avel Lindberg 1kVA toroidal transformers:

115+115V primary----65 + 65Vac secondary.

I have a quote for four transformers at $127 each. Price will drop if quantity increase.

I plan to use that on Mr. Holton's AV800.
price does not include shipping.

K-amps · 27th May 2005, 02:40 AM

My 2 are are included in te 4 right.

gengis · 27th May 2005, 02:43 AM

K-amps,

That's correct.

AndrewT · 28th May 2005, 08:25 AM

Hi,
I just bought a cheap PA amp (Cmark) that runs +-95Vdc on the rails.
The transformer is 4*64Vac and other low current tappings for low level control etc.
But it is about 1.5kVA or possibly bigger.
Judging by the spec sheet the transformer limits 4ohm power output to 525w + 525w driving both channels together or 350w + 350w into 8ohm together. Yes 4ohm power is 1.2db down from 8ohm and a well specified PSU should only be 0.5db to 1db down at 4ohm.
If you also want to drive a difficult 4ohm speaker you should be looking at 2ohm spec and the ability to push enough current to produce about 1kw + 1kw together (-1.5db)
1kVA should be good for a monoblock at the voltages you seem to be aiming for or 2kVA for a stereo amp.

K-amps · 28th May 2005, 01:21 PM

I have gotten 370 watts at 8 ohms RMS (just before clipping, ) from a single Avel 1kva 62-0-62 Toroid with +/-86 vdc rails. At 4 ohms I get 550 watts.

I doubt the tafo you have is 1.5kVA Andrew. With an Avel rated at 67-0-67, I am expecting about 500 watts 8 ohms at clipping.

AndrewT · 28th May 2005, 06:16 PM

Hi,
to me it looks too big to be 1kVA, 175mm diam by 72mm high and I think it is too small for the 4 ohm duty in stereo.
That's why I suggested that you look at something bigger or use as a monoblock.

gengis · 14th June 2005, 01:25 AM

K-Amps,

I guess just you and me. When do you need these transformers?

K-amps · 14th June 2005, 01:56 AM

Sooner the better

still4given · 14th June 2005, 07:17 PM

Did you guys see these?

How do they compare with the ones you are buying?

Blessings, Terry

gengis · 14th June 2005, 10:39 PM

Quote:

Did you guys see these?

How do they compare with the ones you are buying?

Blessings, Terry

Now I have, I had seen this person's advertising before.

In fact, the one I have received look just like that. But w/different secondaries.

27th May 2005, 12:34 AM	#1
gengis diyAudio Member Join Date: Feb 2005 Location: Midwest--IA	65 + 65VAC 1kVA Toroidal Transformer Anyone interest in getting some Avel Lindberg 1kVA toroidal transformers: 115+115V primary----65 + 65Vac secondary. I have a quote for four transformers at $127 each. Price will drop if quantity increase. I plan to use that on Mr. Holton's AV800. price does not include shipping.

28th May 2005, 08:25 AM	#4
AndrewT diyAudio Member Join Date: Jul 2004 Location: Scottish Borders	Hi, I just bought a cheap PA amp (Cmark) that runs +-95Vdc on the rails. The transformer is 4*64Vac and other low current tappings for low level control etc. But it is about 1.5kVA or possibly bigger. Judging by the spec sheet the transformer limits 4ohm power output to 525w + 525w driving both channels together or 350w + 350w into 8ohm together. Yes 4ohm power is 1.2db down from 8ohm and a well specified PSU should only be 0.5db to 1db down at 4ohm. If you also want to drive a difficult 4ohm speaker you should be looking at 2ohm spec and the ability to push enough current to produce about 1kw + 1kw together (-1.5db) 1kVA should be good for a monoblock at the voltages you seem to be aiming for or 2kVA for a stereo amp. __________________ regards Andrew T.

28th May 2005, 06:16 PM	#6
AndrewT diyAudio Member Join Date: Jul 2004 Location: Scottish Borders	Hi, to me it looks too big to be 1kVA, 175mm diam by 72mm high and I think it is too small for the 4 ohm duty in stereo. That's why I suggested that you look at something bigger or use as a monoblock. __________________ regards Andrew T.

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27th May 2005, 02:40 AM	#2
K-amps diyAudio Member Join Date: Nov 2003 Location: Indiana	My 2 are are included in te 4 right.

27th May 2005, 02:43 AM	#3
gengis diyAudio Member Join Date: Feb 2005 Location: Midwest--IA	K-amps, That's correct.

28th May 2005, 01:21 PM	#5
K-amps diyAudio Member Join Date: Nov 2003 Location: Indiana	I have gotten 370 watts at 8 ohms RMS (just before clipping, ) from a single Avel 1kva 62-0-62 Toroid with +/-86 vdc rails. At 4 ohms I get 550 watts. I doubt the tafo you have is 1.5kVA Andrew. With an Avel rated at 67-0-67, I am expecting about 500 watts 8 ohms at clipping.

14th June 2005, 01:25 AM	#7
gengis diyAudio Member Join Date: Feb 2005 Location: Midwest--IA	K-Amps, I guess just you and me. When do you need these transformers?

14th June 2005, 01:56 AM	#8
K-amps diyAudio Member Join Date: Nov 2003 Location: Indiana	Sooner the better

14th June 2005, 07:17 PM	#9
still4given diyAudio Member Join Date: Oct 2004	Did you guys see these? How do they compare with the ones you are buying? Blessings, Terry

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