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Old 31st January 2012, 03:37 PM   #3361
AndrewT is offline AndrewT  Scotland
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Quote:
Originally Posted by KatieandDad View Post
Have I ordered enough to get the two pairs that I need for the DCB1?

I've ordered 20
Plenty.
Remember I said you only need selected Idss.
You will get enough that are close enough.

Have you measured the Vgs of the devices in your B1 yet?
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Old 31st January 2012, 03:40 PM   #3362
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Originally Posted by KatieandDad View Post
There are certainly plenty available at the moment.

If we all order 20 to meet our requirements we can have a DIY bucket with all the mis-matches. A mismatch handful of 30 will also provide suitable matches. I'm certainly not going to hoard the ones that I cant use.
OK, when I get my 20 from Mouser in a few weeks, I'll post what I don't need. I have to build a tester for measuring Idss. A 9volt battery and a DMM is good enough for that, isn't it?
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Old 31st January 2012, 03:41 PM   #3363
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Not yet, I'm enjoying listening to it while I collect the bits together for the DCB1

I've had to order three relays for the DCB1 as a minimum buy quantity. If anyone needs one they were 1.00 each. P&P will be at cost but they weigh nothing.
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Old 31st January 2012, 03:45 PM   #3364
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Any other volunteers to hold the bucket of 2SK170s. I'm happy to store them and re-distribute them - Im not in the game for money - I've got a daytime job that pays the bills.

I may not have the time to match them. I'll just post out as many as you want to borrow for matching.
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Old 31st January 2012, 03:50 PM   #3365
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It's too bad we don't have PCB's for this that take the LSK389:
http://www.linearsystems.com/datasheets/LSK389.pdf

wouldn't have to worry about selecting for Idss I think.

http://www.trendsetter.com/SearchRes...&orderway=desc
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Old 31st January 2012, 03:52 PM   #3366
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It's too bad we don't have PCB's for this that take the LSK389:
http://www.linearsystems.com/datasheets/LSK389.pdf

wouldn't have to worry about selecting for Idss I think.
I'm making my own. It's not difficult as the Salas DCB1 was single sided.

I can't offer to make you one because of both my respect to Salas and his copyright but you can easily make your own.

Nothing more special than Microsoft Paint is required.

Last edited by KatieandDad; 31st January 2012 at 03:54 PM.
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Old 31st January 2012, 03:56 PM   #3367
ramallo is offline ramallo  Europe
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Quote:
Originally Posted by KatieandDad View Post
I'm making my own. It's not difficult as the Salas DCB1 was single sided.

I can't offer to make you one because of both my respect to Salas and his copyright but you can easily make your own.

Nothing more special than Microsoft Paint is required.
You can get here a pcb

P-MEZB1-1V10e - Mezmerize B1 Buffer Preamp (Makes 2 channels; Rev 1.0) - Boards
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Old 31st January 2012, 04:00 PM   #3368
AndrewT is offline AndrewT  Scotland
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that needs 7 relays.
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Old 31st January 2012, 04:02 PM   #3369
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that needs 7 relays.
I'm not building the version with the relay input selector.
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Old 31st January 2012, 04:07 PM   #3370
ramallo is offline ramallo  Europe
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Quote:
Originally Posted by KatieandDad View Post
I'm not building the version with the relay input selector.
You can put a jump on the input relay (In any of the seven)
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