Tea-Bag's IXYS Depletion Mosfet Group and SemiSouth R100 JFET group buy. - Page 30 - diyAudio
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Old 16th November 2011, 08:25 PM   #291
Tea-Bag is offline Tea-Bag  United States
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Quote:
Originally Posted by Arick View Post
Hi,
What kind of price are we looking at?
Cheers,
Eric
Uncertain for now, but they are selling 15 percent less than the R100's.
Last cycle, they had a price increase to 70.00 a pair from me, I am hoping to go 60.00 or under for the R100A's per matched pair.
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Old 17th November 2011, 07:03 AM   #292
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cool, keep me in mind. i'll pop in and pout my name down at some point
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Old 10th December 2011, 11:04 AM   #293
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Quote:
Originally Posted by ra7 View Post
Well, I tried to replace the light bulb in the Delite with a CCS.
Unfortunately, my CCS circuit was wrong and I lost two devices
in the process. If only I were a brighter bulb...

Tea-bag and I spoke about doing another GB. I would be willing
to help with the GB, especially because I need those parts.
The IXTH20N50D is a pretty special part and you can build Paul
Hynes SE1 and CIRC1 amps with it.

I'm in for 10 parts, minimum. Anybody else interested?
How much gain from the driver stage the CIRC1 really need? Can we use tube for the driver stage?
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Old 10th December 2011, 11:54 AM   #294
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Quote:
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How much gain from the driver stage the CIRC1 really need? Can we use tube for the driver stage?
Well, as a gain less follower, a pre with plenty of gain will complement that design real well.
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Old 10th December 2011, 08:05 PM   #295
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Don't you think the circuit can have a much higher output power with another depletion mode MOSFET there? I wish a pair of depletion mode MOSFET can kicks out 100W class A at 8 ohms. Does it exist?
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Old 21st December 2011, 07:36 PM   #296
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SemiSouth R100A's ordered. Should be here by end of the year, early next.
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Old 21st December 2011, 09:59 PM   #297
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cool!!
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Old 26th December 2011, 09:05 PM   #298
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Looking for eight R100As. Count me in if I'm not too late
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Old 26th December 2011, 09:25 PM   #299
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Looking for eight R100As. Count me in if I'm not too late
Your not too late - they are not here yet. Should arrive around first of the year. Then matching and sorting time.
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Old 27th December 2011, 12:23 AM   #300
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Awesome. What's the deal with Newark having a 135 day lead time delay? Are they just pretending to sell them?

Here's a rough guess of a SPICE model:
Code:
.model SJEP120R100A VDMOS (
+ nchan
+ L=1
+ W=2
+ Rg=8
+ Vto=1
+ Rd=50m
+ Rs=10m
+ Rb=1g
+ Phi=1
+ Kp=10
+ Lambda=30m
+ Cgdmax=1.34n
+ Cgdmin=100p
+ Cgs=103p
+ Cjo=1n
+ Is=67p
+ Ron=80m
+ Qg=30n
+ mtriode=.9
+ subThres=0
+ BV=1200
+ IBV=600u
+ Tnom=25
+ mfg=SemiS)
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