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Equivalent of transistors for http://www.borbelyaudio.com
Equivalent of transistors for http://www.borbelyaudio.com
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Old 11th September 2003, 05:48 PM   #11
Fred Dieckmann is offline Fred Dieckmann  United States
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Default hitachi / renesas mosfets

These are very good transistors and I know of no similar device that is close for a drop in replacement.

For lower power devices with even lower capacitance and a little greater transconductance, I would try the Zetex ZVP3310A and ZVP3310A They are capable of about half the power dissipation and 100 volts drain to source. They have a higher turn on votage of around a couple of volts and also need a zener to protect the gate.


http://www.renesas.com/eng/products/...tor/index.html
Power MOSFET for General Amplifier

http://www.ceitron.com/semi/semi.phtml?part=j79

http://www.ceitron.com/semi/semi.phtml?part=K216



The Borbly kits are expensive and I see no reason for a D.I.Y. not to make his own PCBs or build with point to point wiring. This a big part of the DIY experience. Online design reveiws or pretty common here as well.

I will leave Porsche pricing to someone like say.... Jonathan Carr.......
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Old 11th September 2003, 11:36 PM   #12
mlloyd1 is online now mlloyd1  United States
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Equivalent of transistors for http://www.borbelyaudio.com
Default Re: Hitachi/RENESAS

John's right! Time for a group buy?

mlloyd1

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Old 12th September 2003, 03:17 AM   #13
jackinnj is offline jackinnj  United States
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Equivalent of transistors for http://www.borbelyaudio.com
Default Re: ERNO RESPONCE

Quote:
Originally posted by jewilson
While I think some of his design ok cool, I'm not willing to pay the 400% markup he's asking. Also, I've seen many PCB designs on DIYAUDIO that are better than his.
When is a 400% markup justified?

is 400% a lot? -- consider that for the fickle and not enormous DIY market, you hold inventory which can be obsoleted and is subject to the pricing vagaries of any manufacturer who wants to dump their products, consider that you have to pay $600 per month, or $1200 per employee-month for healthcare in the US, and probably lots more in Europe, that you have telecom fees, rent, returns, deadbeats, etc. 400% isn't necessarily a lot. If you are selling to an OEM in the US or Germany 400% would get you laughed out of the parking lot, OTOH 100 or 200% would be acceptable to a contract manufacturer who has a couple hundred or few thousand devices, wants to be able to get credit and the ability to return product.

If you beg to differ, go out and buy 2000 or 20k pieces and try to part them out.
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Old 12th September 2003, 07:49 AM   #14
peranders is offline peranders  Sweden
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Equivalent of transistors for http://www.borbelyaudio.com
About business: Every seller set his own price, high enough to earn money, not too high though. Unfortunately the equation is not totally defined. Lower price may generate higher profit. Compare high CD prices!

I think Erno not have tested his prices.

The disadvantage is that a becoming customer can be "not happy" with the prices because he want the stuff but thinks that the price is a rip-off. Just like Jim here.
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Old 12th September 2003, 01:47 PM   #15
peranders is offline peranders  Sweden
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Equivalent of transistors for http://www.borbelyaudio.com
I think we all can agree that the prices are amazing, 1299 EUR = 1461 USD is not cheap for a phono amp. For this price I would have demanded highest possible quality of the pcb's and CADed also. Maybe even goldplated like the one from HP in the 70's 80's.

http://www.borbelyaudio.com/index22.htm
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Old 12th September 2003, 03:13 PM   #16
AuroraB is offline AuroraB  Norway
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PerAnders..
I've been scrutinizing Borbelys price list for a little while, and comparing with your own prices.....

Ernos basic kit, 2 PCBs and all semi's are 400€...for your own phono pre you charge 100€ for the PCB only...

Erno's AllFET pre uses 4 sets of 4 matched FETs plus a series of matched pairs. You charge SEK 50, or 7€, for matching of Power FETs. Whether you match high or low power, the job is the same...with your prices, the matching job alone will be appx. 150€, then add basic component price and the waste created with proper matching, it seems to me that your own price is at least as high as Borbelys.
Nichicons, Dale resistors etc. are expensive so are commercially made cabinets, ala Fischer.....

I do agree,- 1300€ is expensive, but I bet if someone bothered to look up all the parts necesseary including the extra overhead foor matching, and add it all together, the total cost will be very close to Borbelys. Then in addition you have a matching job to do....
The AllFET pre relies heavily on matching, as most of Borbelys constructiuons. So does a lot of the Pass amps, although in another direction of philosophy. The AllFET reminds me of the Ono in complexity. Which one is best ?? DOn't ask me,- I don't know yet., but I am currently working on an Ono for myself...........

It seems to me that somebody here are out one a witch hunt, possibly under false flag. I do not think this is proper behaviour in a forum like this,- my personal opinion though!!
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Old 12th September 2003, 06:41 PM   #17
SY is offline SY  United States
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Equivalent of transistors for http://www.borbelyaudio.com


Jewilson, it is a serious breach of netiquette and privacy to publish an email without the permission of the sender. I've split off your offending post and the commentary and sent it all to Texas. After discussion among the mods, we are imposing a 2 day SinBin sentence, suspended since it's your first offense. We reserve the right to "unsuspend" it, if we feel that's appropriate.
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