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Scarymonsta
Bronze Member
United Kingdom
90 Posts |
 Posted - 03/18/2010 : 21:10:26
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Sorry Guys - I'm being really lazy here and I haven't searched...
Anyone know any easily (UK source preferred) equivalents for the following trannys;
2SK30A-Y
2SC732TM-GR
2SC945P
Thanks
Chris |
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Laurie
Double Platinum Member
Canada
4854 Posts |
Posted - 03/18/2010 : 22:11:12
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quote:
Originally posted by Scarymonsta
Sorry Guys - I'm being really lazy here and I haven't searched...
Anyone know any equivalents for the following
2SK30A-Y
I've never found a "good" equivalent. I've bought some from Asian suppliers on eBay and they are "ok"... a little bit off spec but not too bad. |
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bossarea
Forum Admin
United Kingdom
3652 Posts |
Posted - 03/18/2010 : 22:47:49
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I got an old (Heninger Schellvergleichsliste 1984) list that lists the following equivalents
2SK30 - BF245
2SC732 - BC550
2SC945 - BC546
A newer list (Semiconductor Cross Reference Book, Sams Publishing 2001) lists the following replacments
2SK30A-Y - 14733 - NTE459, ECG459, 11302452 (Radio Shack), SK3112
2SK30A-Y(SGD) - 04904 - ECG459
2SC732TM - 03342 - ECG199
2SC732GR - 11306 - NTE199, ECG199, 11300969 (Radio Shack), SK3245
2SC945P - 07455 - ECG85
The results from the second book is probably more accurate as it lists over 600k semiconductors and claims to have to have done extensive research. I have however never tested any of these equivalents so I don't guarantee anything. Also, the replacements from the second book are rarely available from European dealers so you might not easily get hold them.
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cctsim
Silver Member
United Kingdom
418 Posts |
Posted - 03/19/2010 : 00:05:11
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The correct replacement for 2SK30 is BF245A.
There are also the BF245B and BF245C types which are really unusable for stompboxes. |
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Scarymonsta
Bronze Member
United Kingdom
90 Posts |
Posted - 03/19/2010 : 15:21:57
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Thanks Guys
My old "International Transistor Equivalents Guide" wasn't much help so cheers for the heads up
Reason for asking - thinking of cloning a CE-2 as the ebay prices are just bonkers.
Cheers
Chris |
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Dr. Bob
Moderator
Australia
6593 Posts |
Posted - 03/19/2010 : 15:46:23
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quote:
Originally posted by Scarymonsta
Thanks Guys
My old "International Transistor Equivalents Guide" wasn't much help so cheers for the heads up
Reason for asking - thinking of cloning a CE-2 as the ebay prices are just bonkers.
Cheers
Chris
Hi Scarymonsta & guys
Already been done.
Check out TonePad.
main projects page:
http://www.tonepad.com/projects.asp?projectType=fx
Corrrral Chorus - A Boss CE-2 Clone:
http://www.tonepad.com/project.asp?id=53
Plus one of the newer members recently rebuilt one of these.
So there are some pictures he uploaded recently on the forum.
(It's late I can't remember the new member name)
If anyone remembers. please chime in.
Regards Dr. Bob  |
Edited by - Dr. Bob on 03/19/2010 15:56:19 |
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Dr. Bob
Moderator
Australia
6593 Posts |
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Dirk_Hendrik
Copper Member
Netherlands
28 Posts |
Posted - 03/19/2010 : 16:54:44
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quote:
Originally posted by bossarea
I got an old (Heninger Schellvergleichsliste 1984) list that lists the following equivalents
2SK30 - BF245
2SC732 - BC550
2SC945 - BC546
A newer list (Semiconductor Cross Reference Book, Sams Publishing 2001) lists the following replacments
2SK30A-Y - 14733 - NTE459, ECG459, 11302452 (Radio Shack), SK3112
2SK30A-Y(SGD) - 04904 - ECG459
2SC732TM - 03342 - ECG199
2SC732GR - 11306 - NTE199, ECG199, 11300969 (Radio Shack), SK3245
2SC945P - 07455 - ECG85
The results from the second book is probably more accurate as it lists over 600k semiconductors and claims to have to have done extensive research. I have however never tested any of these equivalents so I don't guarantee anything. Also, the replacements from the second book are rarely available from European dealers so you might not easily get hold them.
Beware that these are not necessarily pin compatible.
As for the 2SK30. This one is in most cases used as switch and sometimes as input buffer. I never found a problem when replaced with another type of N-Fet. |
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Laurie
Double Platinum Member
Canada
4854 Posts |
Posted - 03/19/2010 : 17:33:10
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quote:
Originally posted by Dirk_Hendrik
As for the 2SK30. This one is in most cases used as switch and sometimes as input buffer. I never found a problem when replaced with another type of N-Fet.
Some uses (eg SG-1 clone) the K30 is used as a variable resistor. Whatever you use in this application needs to be close to spec for this to work, or a gate drive circuit redesign will be required.
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Dirk_Hendrik
Copper Member
Netherlands
28 Posts |
Posted - 03/19/2010 : 19:19:43
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| Very true. |
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kelmaur
Gold Member
USA
505 Posts |
Posted - 03/19/2010 : 20:18:07
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quote:
Originally posted by Dr. Bob
quote:
Originally posted by Scarymonsta
Thanks GuysMy old "International Transistor Equivalents Guide" wasn't much help so cheers for the heads upReason for asking - thinking of cloning a CE-2 as the ebay prices are just bonkers.CheersChris
Hi Scarymonsta & guysAlready been done.Check out TonePad.main projects page:http://www.tonepad.com/projects.asp?projectType=fxCorrrral Chorus - A Boss CE-2 Clone:http://www.tonepad.com/project.asp?id=53Plus one of the newer members recently rebuilt one of these.So there are some pictures he uploaded recently on the forum.(It's late I can't remember the new member name)If anyone remembers. please chime in.Regards Dr. Bob
where is the parts list at? i dont see anything telling you how to make it |
Edited by - kelmaur on 03/19/2010 20:19:18 |
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Lazy Transistor Equivalents Question
