| Fix |
Transformator for the KrellClone KSA-100MKII project.
This will be similar specs as the USA GB, but the transformator will be manufactured by Avel Lindberg.
All depending on price, else we can join stolbovoy's GB and share for the shipping to Europe.
I hope Floedstroem can post the details about the trafo in this thread. |
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| stolbovoy |
| Did you get any pricing info from Avel? |
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| Fix |
I hope that Floedstrom checks it up, since he knows all details.
Else I can do it If someone post what I need to ask.
If lucky they are cheaper :-) |
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| Flodstroem |
Hi
I only have an old price quotation from Avel Lindberg since 2006/2007 which is as follows:
1-4 units, £ 160 nett. (approx. $ 320)
5-29 units, £ 145 nett. (approx. $ 290)
Physical formates of the Krell originals are this: Diam. 172 x H 127 (6.75" x 5")
But, I have also received a price quotation from the Noratel/Toroid (in Norway) and this quotation was for 6 units (6-10 I guess) @ a price of approx. £ 200 each unit.
(approx. same specs. as for the stolbovoy´s transformer)
If there are interests for this transformer in the US, they could probably ship those units included in their general transformer shipments to Avel´s sister Company in the US.
There is interests for the Krell originals and Im up for 6 units.
And there is some interests in Denmark too (2 units minimum)
If Mark still are interested he is up for 2 units
makes a total of 10 units so far.
However, the price quotation from Avel are old so I have wrote to them again for to ask for a new updated price quotation, (if they still are interested to manufacture this unit). We will see whats happens next week. In the mean time, this is how the originals looks like: |
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| Flodstroem |
Ok, new 2008-prices for the original Krell KSA 100 mk-II transformer as follows (manufacturing by Avel Lindberg, the former Krell supplier):
1-4 units: £ 200 ($ 400)
5-29 units: £ 155 ($ 310)
Regarding shipping to the US, Avel Lindberg says this:
| quote: | With regards to shipment costs, if you require some units manufactured I will contact our US office to obtain whether we can use their carrier system when we ship to them.
However, please be aware, we only ship to the USA four times a year and so, unlkess your order is received at a convenient time, it may not coincide with a shipment. |
Flodstroem is in with 4 units.
Regards :cool: |
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| Fix |
| Flodstroem, could you post the details on the Transformator. |
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| Flodstroem |
This is the power supply for the KSA 100 mk-II.
transformer secondary data shown are from worse case mains voltage (e.g. transformer wired for 100VAC and plugged to 110VAC mains)
This is the transformer data that can be officially shown, including the VA-ratings of approx. 900VA.
All other data remains the secret of the Krell company :xeye:
Regards :cool: |
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| Fix |
Floedstrom:
Your price quote, Is VAT included ? |
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| Flodstroem |
Nope, this is nett-prices. You must add shipping costs. Custom taxes and duties etc . will be charged when arriving to your country.
Regards :cool: |
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| Fix |
How many are interested in the GB ?
Fix @2
Floedstrom @4
Total of: 6 pcs for £155/each
Then we have the "low" price :-)
** Floedstrom, do you think that we can get a better price at 10pcs ? Look hard to reach 29 units... |
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| samoloko |
very expensive
can this be purchased from USA In much low price |
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| Flodstroem |
samoloko, if you meant a Krell original manufactured by Avel Lindberg this is impossible due to the factory are located in the UK. Avel only have a sales office in the USA but could maybe ship units to that office (read post #6)
Regards :cool: |
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| Fix |
For those interested, it would be nice if we could make the groupbuy in next 2 weeks.
Please sign up.. |
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| RKH |
I may be interested in 2. I will have shipped to friend in the UK. Can you indicate where we are for the total?
Will the Transformers be similar to those in the photo? I.e. 'enclosed'?
Cheers,
Ryan |
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| krmaudio |
| maybe up for 2 tx's and i fi can help in any way im uk based of course! |
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| krmaudio |
| will the avel lindberg be as the krell original physically same size case style and the four mounting tabs? looks like a good way to keep down any mechanical noise..... |
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| AndrewT |
| quote: | Originally posted by krmaudio
will the avel lindberg be as the krell original physically same size case style and the four mounting tabs? looks like a good way to keep down any mechanical noise..... |
not necessarily.
A stiff mechanical coupling may transfer more noise into the chassis and sound louder than a decoupled transformer. |
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| krmaudio |
| It looks like the original is mounted on four rubber bobbin type insulators..... |
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| Fix |
Fix @2
Floedstrom @4
krmaudio @ 2
RKH @ 2
Total: 10
Shall we try to get a better price for 10pcs ?
Did you check it up Floedstrom ? |
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| samoloko |
I also trying to get transformers for 2 amps
which transformer you chose - original Avel or Toroid In previous post
also what are the spec for that transformer
how transformers like this I need for one amp 1 pcs or 2 pcs |
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| samoloko |
how Is going to be done shipment of the trans
they will be shipped from the factory to floedstrome or Individually from UK to every receipt
how much will cost shipment from UK to Sweden |
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| Fix |
You need 2pcs for a stereo amp.
About shipping:
We can proably do what we want.
But I guess it will be most easy to send to one forum member, and then directly to all others from him.
Also if there are lots of orders from one country, we ship all trafos to one forum member and then he sends to each member in that country.
I can be the contact person in Sweden, I have a VAT Registered company, and can handle shipping and everything. |
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| RKH |
If this happens... I have a friend within the UK to whom I 'd like mine shipped. Is that problematic? Seems to be extra cost to go from the UK to Sweden & back.
Thanks.
Ryan |
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| samoloko |
there are two things
price of the transformer - 155 pounds - very high for 1 pcs also there are VAT (how much ) shipping
quality - for that price range the transformer have to be like Plitron or even better
what do you think of the option - other manufactures - Plitron, Hammond, Toroid (stolvoboy USA GB) |
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| Fix |
Guess shipping will be the easy part...
In Sweden/Denmark/Norway VAT is 25%
But if you have a VAT registered company you can remove VAT. |
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| samoloko |
In Bulgaria where I am VAT Is 20%
How about quotation from www.amplimo.com
they make HQ they are closer their prices would be better |
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| jacco vermeulen |
imho, if you are fixated on spending so much money you would be much better off requesting a quote for an R-core transformer in an R-600 to R-1000 size. (eg Arrow in HK)
Even ordering a few dozen 500VA R-cores at Selectronic in France and picking them up in person at the Belgian/France border line store in Lille would be cheaper and a whole lot better.
(but what do i care, i w&d 2 NOS big gun Plitrons for the KSA out of Germany, for 50 buckeroos each) |
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| RKH |
i always, well, usually, like Jacco's ideas ... ;)
Ryan |
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| Fix |
Maybe Jaccos alternative is better ?
Since I don't know what we need for specs, and Floedstrom checked it up maybe Floedstrom can get quotes here.
If we can get a Lower price with same quality and specs then is ok. |
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| samoloko |
why not ask amplimo.nl for quotes
anyone used them
I have heard that they are quality products |
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| samoloko |
I asked www.amplimo.nl for price of 2 pcs x-formers
to me amplimo and plitron are of same quality
primary - 230 VAC
secondary - 35 VAC x 2 8.95 A
- 55 VAC x 2 0.75 A
- 15 VAC x 2 1 A
this spec will do work for me
here are what they offer me
We do manufacture custom-made designs, however a production batch of only 2 pcs is not very economical and therefore expensive.
We can offer you this transformer in “audio-grade / low-noise” quality for EUR 200,00 nett, excl VAT each.
Dimensions : diameter approx 160mm, height approx 62mm.
Delivery: EXW (incoterms 2000)
Payment: in advance.
I suggest Floedstrome to ask for a quote,contact them and tell what spec are better to use for that amplifier
I will buy 2 - 4 or even 6 depending on price |
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| Fix |
The "original" trafo that floedstrom have prices for
1-4 units: £ 200 ($ 400)
5-29 units: £ 155 ($ 310)
Guess they are pretty the same, and then I prefer the "original" ? |
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| samoloko |
200 euro for 2 pcs Is better than 200 pounds for 4 pcs
transport will be less expensive from NL than GB
I have heard there are some avels make noise |
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| AndrewT |
| quote: | Originally posted by samoloko
primary - 230 VAC
secondary - 35 VAC x 2 8.95 A
- 55 VAC x 2 0.75 A
- 15 VAC x 2 1 A |
for KSA100 Klone the 35Vac is slightly low.
The 626VA of the main windings is very low.
36Vac or 37Vac and 12A would be closer. |
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| samoloko |
don't you think that for bias 2.65 A it is enough to have 625 VA per channel
sure It Is not original but what Is the reason to have much more |
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| AndrewT |
Hi,
a transformer feeding a capacitor input filter must be rated to deliver a continuous DC current of pretty near half the rated AC current.
If you want/need a continuous rating of 2.65Adc then the minimum rating for the secondary is 5.3Aac.
But this will run the transformer at it's maximum rating continuously. It will run HOT.
It is usually recommended that the continuous load be less than about half the maximum rating to stay within tolerable temperatures.
This requires an AC rating of >=10.6Aac.
I think Krell specified their transformer on regulation not maximum temperature. Their toroid would run even cooler due to the extra copper and iron to get their regulation specification. |
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| samoloko |
thx andrew
what do you think about 55 VAC 0.75 A Is it good to be used with Bob Ellis scalable regulator 45 - 65 VDC |
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| Fix |
Samloko:
We only need 5pcs to get £155 price, and that's similar to the one you got in price. Alse we have the original manufactor, and similar specs as possible with all volts needed and lots of ampere :-)
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| Fix |
I want to place an order now...
So for you who are interested, let me know and then we can make it next week.
we need 5pcs to get lower price
FIX @ 2 |
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| Flodstroem |
Hi
I have purchased two units of this transformer just for to get the possibility to go further with this KSA100 project (and thanks Ryan for the good tip):
http://www.diycable.com/main/produc...products_id=597
Looks like a good transformer for the project except for the aux-windings for the 60-72V DC.
I ordered those for to be shipped by sea freight, weight: 50.60 lb. 4 weeks at sea and total shipping, Sea: 295 NOK (jetCarrier in Norway) which is approx. $ 47.00 + $ 45.50 (from Diycable to the carrier in the US), total shipping approx. $ 92.50 and transformers: $ 88 each unit = $ 176 Totals would then be $ 134.25 If adding custom tax (25%) an duties (200 NOK) those transformers would costs approx. $ 184 each unit when putting my hands on them.
Anyone member in the US who have tried this transformer?
Regards :cool: |
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| RKH |
I purchased two transformers but have not tried them in situ. The fabrication quality appears to be first rate. The packaging was also very high quality. It will be a while before I get to put them to use.
Ryan |
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| Fix |
Floedstrom:
Look nice, but how about aux-windings for the 60-72V DC
Did you find any good trafo for that ?
Shall we close this GB and settle for the trafo listed at Diycable ?
Shipping: At DIYCable where do I choose freight by Sea, or just mail them ? |
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| samoloko |
I still don't know why we are not asking www.amplimo.nl for a qoute with the spec of avel trafo
It will not hurt at all
they are audio grade, europe based - less taxes, hq brand
diycable trafo looks suspicious to me |
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| Fix |
OK, maybe you're right.
Ask Floedstrom to post all Details for trafo, then you can ask them for a pricequote.
Then we decide.
I still vote for the Avel version, price is high, but I get all voltages I need. |
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| samoloko |
I will ask for a qoute
are you agree with that spec for audio grade transformer
Primaries:
dual 120V or one 230V - please suggest
Secondaries (total 5 windings)
bifilar 2x 38.5V RMS at 12A RMS
bifilar 2x 60V RMS at 0.8a - I don't know If that Is too high - please suggest
single 12V x 0.8a
option
STATIC SHIELD between primaries and secondaries.
MAGNETIC SHIELD = 70mm |
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| Flodstroem |
Hi samoloko, if reading the KSA100-Wiki you will find all data needed for to order a suitable transformer. The Wiki kan be found here (read the transformer information):
http://www.diyaudio.com/wiki/index....n+the+group+buy
Regarding closing of the transformer-GB, I have only ordered two x-formers for to be able to feed amps for to be able to check everything. When finishing the project my intention are to order those Krell originals. And the Diycable x-formers will be used to feed a Gregg 300W MosFET-amp (210W with those x-formers).
If using a voltage doubler maybe it is possible to use the 2 x 13V but Im not sure if the Amperes are enough. A maximum of 0.18A are available if using a voltage doubler (e.g. 13V x 1.4 x 4=approx 72V @ 0.18A)
:cool: |
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| AndrewT |
| quote: | Originally posted by Flodstroem
If using a voltage doubler maybe it is possible to use the 2 x 13V but Im not sure if the Amperes are enough. A maximum of 0.18A are available if using a voltage doubler (e.g. 13V x 1.4 x 4=approx 72V @ 0.18A) |
consider totem pole of the 13+37Vac windings, with separate rectifiers for the low current supplies.
Hum elimination may be a problem but should be solvable. |
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| Flodstroem |
Hi AndrewT. The 2x 13V are a 26V winding including a center tap. Not two separated windings if this is of any importance.
samoloko, I wrote to Amplimo for a price quotation. Lets see when answer arrives what the price will be.
:cool: |
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| Fix |
Sounds to me that there still is interest in the Avel trafo ?
1-4 units: £ 200 ($ 400)
5-29 units: £ 155 ($ 310)
To sum it up, we will reach 5pcs, not 29pcs, maybe we can get a price on 10pcs ?
It appears that we are 3-4 people that are very interested in the trafo GB.
Fix, Floedstrom, Samloko
1. Shall we take more quotes from other manufacters ?
2. Shall we go for the DIYCable trafo ?
3. Shall we realise the GB for the Aveltrafo ?
Shall we talk over IRC or similar to decide what to do ?
Floedstrom: I thought you settled with the DIYCable trafo. |
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| AndrewT |
| quote: | Originally posted by Flodstroem
Hi AndrewT. The 2x 13V are a 26V winding including a center tap. Not two separated windings if this is of any importance.
samoloko, I wrote to Amplimo for a price quotation. Lets see when answer arrives what the price will be.
:cool: |
dual 13Vac is required for the totem pole.
CT does not work, sorry for the misinformation.
But, can you access the centre tap and split it? |
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| Flodstroem |
| quote: | Originally posted by AndrewT
But, can you access the centre tap and split it? |
Andrew, most likely not when studying the pictures. (note: I havnt received my two units yet). But its possible the CT has been wired in a way so the two copper leads from each winding are routed in a common sleeve
But for the test of my six monoblock Im going to use a smaller x-former for the input and driver stage.
:cool: |
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| samoloko |
| quote: | Originally posted by Flodstroem
Hi AndrewT. The 2x 13V are a 26V winding including a center tap. Not two separated windings if this is of any importance.
samoloko, I wrote to Amplimo for a price quotation. Lets see when answer arrives what the price will be.
:cool: |
thx |
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