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Old 28th November 2003, 04:52 AM   #31
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Join Date: Nov 2002
Location: hong kong
Default Tango XE iron

fdegrove.

reckon OPT & choke is from mainland china.
Only USD 30 per one if order 50pcs,

John,

Tango XE20S is a good iron but the little bit not good is. Its use the different connect method in secondary winding to reflex to primary winding to change the primary Kohm.
But the New Hashimoto is 2.5K, 3.5K secondary is fix. 0~4~8~16.
The fix of secondary can give U more stable Bass.
I will test the performance & told U later.
I think may be I had more experience to share to other diyers about the different performance of different brand Japan OPT.
If U visit my site. I can supply.

Tamura, Tango, James, Hashimoto & Dabura OPT. All this is the topest from japan.

www.diyaudiocraft.com

I can supply cobalt, double c-core from germany & winding from japan to OEM trans.
So, this will benefit me to collect more data & the performance of different.
Let's compare the data.
Tamura F5003 5K SE had -2.7db on 20hz. 100K hz is -6.8db.
120khz -11.3db.
My OEM c-core 5K SE test 20Hz -0.1db. 100Khz -3.2db.
120khz -8.4db.

MY test use HP339A distortion measurement set every 1khz increase to test.

its quite exspensive but accurate.

Pls see the photo of the testing choke.
This is sample. 12H 250ma but parallel & seperate into 4 parts to prevent spark during high voltage.

for more information about this design.
pls visit.

http://www.ae-europe.nl/smoorspoelen.htm

U will see its very expensive.


thanks

thomas
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File Type: jpg my special order ultra low noise choke..jpg (54.6 KB, 743 views)
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Old 28th November 2003, 07:01 PM   #32
Raj1 is offline Raj1  United Kingdom
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Location: UK
Hi,

On the subject of opt's, has anyone here tried the plitron toroidal opt's by vanderveen?

What's regarded as the best type of tranformer for outputs, toroidal or other?

Frank what should one look out for when buying a SE opt (I know you prefer PP),
(I've seen differences in frequency response etc) in other words if you were looking to buy good iron what make/types would you be looking at?


Thanks
Raja


PS, no fights please, don't want this to follow the same course as the clock thread......
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Old 28th November 2003, 07:59 PM   #33
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Location: Belgium
Hi,

Quote:
in other words if you were looking to buy good iron what make/types would you be looking at?
In Europe the Lundahl have a very good reputation.

From Holland you can buy the OPTs from AE.

There are a number of lesser known manufacturers in Germany and France also that I know of.

Than there's Bartolucci in Italy which show excelent specs and seem very nicely finished.

In the U.K. there's Sowter, S&B and a raft of smaller manufacturers as well.

The problem is that you can't all try them out without spending a small fortune on iron, so I usually go by reputation.

Having a very helpful distributor close by is also a plus IMO.

As you can see there's never been so much to choose from...

Cheers,
__________________
Frank
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Old 2nd December 2003, 03:41 PM   #34
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Location: hong kong
Talking Tango XE iron

hi,

previous I said one of the new brand japan OPT that never export but all hand made. Use all double c-core to make the OPT.
Pls see this file from Japan MJ Diyer magazine.

Its over 20 pages.

pls visit about web.


http://hk.briefcase.yahoo.com/tubediyer

thanks

thomas

www.diyaudiocraft.com
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Old 2nd December 2003, 06:59 PM   #35
Raj1 is offline Raj1  United Kingdom
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Location: UK
Default opt's

Hi all,

continuing on the subject of opt's I sent an email to amplino regarding the 3025se opt. The question related to dc saturation, that is possible with torroidal types here's the reply;

Dear Raja,

Thank you for your e-mail.
You are right about the saturation by dc current for a normal toroidal transformer designed as supply transformer or push-pull output transformer.
Our range of SE transformers however are specially designed for Single Ended applications in which there has to be a dc current through the primary winding.
As you can see in the attached datasheet the VDV3025SE has a maximum saturation current IDC of 204mA, the optimal bias current for maximal (optimal) power would be 0,5x IDC = 102mA.
Your circuit diagram is that of a typical single ended amplifier, and 85mA is no problem at all.
I hope to have informed you sufficiently, but if you have any questions please contact us.

With best regards,

Henk te Selle
h.teselle@amplimo.nl

If I do buy opt's I think I'd stick to UK (where I live) or possibly europe, I've heard that importing costs into the UK can incur a customs charge of 20% and also VAT of 17.5%
Kinda makes buying good iron from abroad very difficult if one doesn't have a stockist within the country.

Has anybody here ordered opt's etc from abroad and have an idea of what sort of costs one could incur?????


Thanks
Raja
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Old 2nd December 2003, 09:03 PM   #36
dhaen is offline dhaen  Europe
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Location: U.K.
Default Going Dutch...

Raja,

If you buy from Europe (EU) you will not pay duty, only the local VAT rate of the seller.
I bought some transformers from Automatic Electric Europe
and have been very pleased with them.
I noticed just now that they have English versions of their audio web-pages.
Send me an email if you want more info.
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Old 2nd December 2003, 11:05 PM   #37
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Location: Belgium
Hi,

Quote:
If I do buy opt's I think I'd stick to UK (where I live) or possibly europe, I've heard that importing costs into the UK can incur a customs charge of 20% and also VAT of 17.5%
I'm not too sure about the UK as far as importing from outside the EU goes.

In Belgium you'd pay 21% VAT and an extra 9% of extra-EU import taxes.

For some obscure reason importing from the UK always was more expensive than from the U.S. regardless of that 9% extra-EU tax.

Somehow goods seem to have trouble crossing the Channel.

Now that there's the Chunnel all that may have changed....

Cheers,
__________________
Frank
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Old 3rd December 2003, 10:59 AM   #38
Mike C is offline Mike C  United Kingdom
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Location: South east Essex, UK
Default Imports into UK from Outside the EU

I've done this several times, from the USA, Canada and the far east.

For electronic components of up to about 50 I have not been charged anything. I think I've been lucky as I think the limit is less than this.

For more expensive items (kits and a CD player) I have always been charged VAT at 17.5% and duty.
However, the duty has never been very much, only a few %; VAT and duty total is typically 22% or so.

There may also be an additional charge by the local carrier at this end for them doing the customs clearance. I seem to remember that this is somewhat variable.

If you reckon on about 25% total charges you probably won't be far out.
A 'quick and dirty' guesstimator that's remarkably accurate is that the list price (net dollar cost without taxes or postage) in dollars ends up very close to the final cost in pounds with carriage, VAT, duty, commissions etc.
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