Tea-Bag's IXYS Depletion Mosfet Group and SemiSouth R100 JFET group buy. - Page 3 - diyAudio
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Old 24th February 2010, 11:39 PM   #21
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Default Deptetion Mode Mosfet for Constant current source

I'm looking for a depletion mode mosfet for a constant current source in SE tube amplifier. The best I found so far is the DN2540 but the power dispersion is limited but works really well in its range. I'd love to have the IXYS mosfets in this thread but they have Ciss too high (over ten times the DN2540), and that would compromise sound details.

Last edited by apelizzo; 24th February 2010 at 11:42 PM.
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Old 25th February 2010, 02:33 AM   #22
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Spreadsheet updated. Thank you!
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Old 25th February 2010, 06:39 AM   #23
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hi apelizzo,

have you visited the ixys website ? some interesting new products could match your wishes, you could find ccs in to220 package. hope this helps
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Old 25th February 2010, 10:37 PM   #24
Tea-Bag is offline Tea-Bag  United States
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True, IXYS makes lot's of stuff, including some nice power diodes.
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Old 26th February 2010, 02:30 AM   #25
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Quote:
Originally Posted by facelvega View Post
hi apelizzo,

have you visited the ixys website ? some interesting new products could match your wishes, you could find ccs in to220 package. hope this helps
That's great! Thanks for that. There are several new devices and those I was looking for.
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Old 26th February 2010, 02:51 PM   #26
Tea-Bag is offline Tea-Bag  United States
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Have an update on the SemiSouth devices.

The lead time is 12 weeks from payment. So this might be a dissapointment to some.
However, we can set a date in the next two weeks to payup for the orders (like 3/14 deadline). If you can't wait 12 weeks, which puts us in the second week of June, then please update your order.
Since some are ordering depletion Mosfets, those are lead times of 3-5 weeks to my door.
What I will do is ship the D-Fet's when I get them, and the SemiSouth's when I get them, only charging shipping once.

So it will look something like this.

SemiSouth's 60USD matched pair shipped. Quads will be best effort. Probably mid-June delivery. This price is far less then when these critters first came out, but still really high. This is a small company using expensive materials.

For Depletion MosFets
IXTH20N50D 15.00 pr. 6.00 shipping for up to 4pr. 8.00 up to 12 pair, beyond that, PM ME.
IXTH6N50D2 10.00 pr, same shipping as above.

Let me know how this sounds. I would like some feedback on this. The price assumes we role out minimum 50pr or so on each.
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Old 26th February 2010, 03:00 PM   #27
vtr is offline vtr  Switzerland
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Smile for me

no problem to wait

thanks for the work
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Old 26th February 2010, 03:37 PM   #28
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Sounds good to me. My projects tend to move at a glacial pace anyway, so the delay, which isn't unexpected, is of little or no consequence to me. Appreciate your efforts, too. - Pat
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Old 27th February 2010, 07:55 PM   #29
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Hey all,

Regarding the SemiSouth JFET's

I realize some of you are being offered a better price.
Of course it is your choice to choose which person you wish to purchase these from.
I can't lower the price without losing money at this point. If you wish to not stay with the group buy for SS, this is fine. Just update the spreadsheet or let me know.

I can only stand on my previous GB efforts, which so far have been successful.
I am not doing this for some large money making effort. Just doing this to allow people to get some harder to find Fet's from a reasonable price, and to seed some DIY's to come up with some excellent circuits ideas, some of which have been shared.

To move all the GB forward, I am going to start payment for FET's tommorow, and last day to pay up will be March 14th.

Hope all is well. Let me know if there are any questions.
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Old 27th February 2010, 08:16 PM   #30
lae2 is offline lae2  United States
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TB,

At sum=43 is there a feasible target where we might get a better price. How close are we? Is there merit to waiting a bit? Nevertheless, I am staying on-board with your GB regardless of the price. lae
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