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TSE Parts

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T

TerribleT

Member
Joined 2004
Hello,
I've just ordered some parts for the Tubelab SE from Digi-Key. They didn't have the FRED diodes in stock and the Toshiba 2SK3863 are now obsolete and unavailable. They also didn't have the dual heat sink HS219-ND. Does anyone out there know of a source for the Toshiba Mosfets and heatsinks or suitable substitutes? If you have any extras, I'm willing to buy.
Thanks,
David
 
T

TerribleT

Member
Joined 2004
Hello Gentlemen,
You guys are very helpful, too helpful I'm afraid. Now, I have four or maybe more choices of mosfets to choose from:

1. TK4A60D(Q)-ND Suggested by pso. Please tell me if you've used this part and if it works properly.

2. FDPF5N50NZ-ND Beeah said he would use this part. Beeah, how did it work out?

3. 2SK3565-ND Evanc used this part but it is now obsolete. Would a 2sk3564 work?

4. IRF830APBF-ND This part was used by Alco and it worked fine for him.

So gentlemen, which shall it be #1,2,3,4, or other?
Thanks
David
 
Alan Hope

Alan Hope

Member
Joined 2004
These guys delivered to me in the UK last month ...
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This is Vanessa from Hongkong Hungyick Trading Co.
2SK3563 TOSHIBA TO-220 　 4PCS $5.00/pcs NEW And Original
Delivery time: arrange immediately once customer paid，usually 2-3days
Quality guaranteed period : 90days
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boywonder

boywonder

Member
Joined 2008
about those MOSFETs....

I'm curious about the required voltage rating of the MOSFETs......in the TubelabSE it appears that the source-drain voltage can be high, especially when running 300B's at 375-400V or so, since the -ve rail can be upwards (downwards?) of -300V for a difference of 700V or so. It would seem like the 500V rated parts wouldn't stand much of a chance. Are the 2SK3563's and other 500V rated parts only appropriate when running 45's?

Is it as simple as looking at the source-to-drain voltage difference? I suppose the 20K/36K R connected to the source side has something to do with it......do those R's drop all of the voltage?
 
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D

diecast

Member
Joined 2009
I have been gathering parts for so long that...

I got my TSE board on May 2007 and at the time the 2SK2700 was still available here and there and I got some. I also have some 2SK3563 I acquired more recently - the result of "well maybe..." type thought process that means I also have five different sets of coupling caps. I expect there are fellow sufferers out there.

So which is preferable? From the Crss graphs I have it looks like the 2SK2700 may have a lower capacitance but more variable with voltage whereas the 2SK3563 has about 7pF but dead flat.

I do get round to making things BTW. I will post some pictures of my SSE later.

Andrew
 
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