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Old 11th July 2018, 10:39 AM   #341
craydive is offline craydive
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Join Date: Apr 2011
Location: The Land Downunder....
GB2 UPDATE

Ajit - 2 PCBS
steefdebruijn - 2 PCBS
amitskamal - 1 STEREO KIT
Neurotica - 2 PCBs
vvs07 - 4 PCBs
outtek - 2 PCB + 4 MOSFETS
smouse - 2 PCBS
ejno - 2 PCBS
craydive - 4 PCBS
PinkPink - 4 PCBs
Avesbilal - 4 PCB's

- Shaan best to check if this is correct, but I noticed Bilal requested the boards in post #336
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Old 13th July 2018, 10:09 AM   #342
hallcon83 is offline hallcon83  United States
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Join Date: Jun 2008
Location: Fort Worth , Texas , USA
PeeCeeBee V4H GB
GB2 UPDATE

Ajit - 2 PCBS
steefdebruijn - 2 PCBS
amitskamal - 1 STEREO KIT
Neurotica - 2 PCBs
vvs07 - 4 PCBs
outtek - 2 PCB + 4 MOSFETS
smouse - 2 PCBS
ejno - 2 PCBS
craydive - 4 PCBS
PinkPink - 4 PCBs
Avesbilal - 4 PCB's
hallcon83 - 4 PCB's
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Old 14th July 2018, 12:51 PM   #343
J.M.K is offline J.M.K  France
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Join Date: Jan 2009
Location: France
Default Ordering V4H boards

Hi!

I just posted bmy request a couple of hours ago, but it disappeared from this thread!

So, I'll be for a stereo kit (2 boards with their mosfets)
+ 2 plain boards as spare.

Thanks a lot

JM
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Old 14th July 2018, 01:45 PM   #344
J.M.K is offline J.M.K  France
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Join Date: Jan 2009
Location: France
Default GB2 UPDATE

GB2 UPDATE

Ajit - 2 PCBS
steefdebruijn - 2 PCBS
amitskamal - 1 STEREO KIT
Neurotica - 2 PCBs
vvs07 - 4 PCBs
outtek - 2 PCB + 4 MOSFETS
smouse - 2 PCBS
ejno - 2 PCBS
craydive - 4 PCBS
PinkPink - 4 PCBs
Avesbilal - 4 PCB's
hallcon83 - 4 PCB's
J.M.K - 4 PCBS + 2 pairs of Mosfets
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Old 19th July 2018, 01:06 AM   #345
shaan is offline shaan  India
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Join Date: Mar 2009
Location: Kolkata
GB2 UPDATE

Ajit - 2 PCBS
steefdebruijn - 2 PCBS
amitskamal - 1 STEREO KIT
Neurotica - 2 PCBs
vvs07 - 4 PCBs
outtek - 2 PCB + 4 MOSFETS
smouse - 2 PCBS
ejno - 2 PCBS
craydive - 4 PCBS
PinkPink - 4 PCBs
Avesbilal - 4 PCB's
hallcon83 - 4 PCB's
J.M.K - 4 PCBS + 2 pairs of Mosfets
CitizenKane - 4 PCBs
gaborbela - 2 PCBs

I will start sending PM and invoices to GB members from this Monday.

Thanks for your interest in PeeCeeBee.
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Old 20th July 2018, 05:52 AM   #346
craydive is offline craydive
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Join Date: Apr 2011
Location: The Land Downunder....
Hi Shaan,
Is there any improvements to be had by matching the output transistors 2SK1058/2SJ162 in gain or any other parameter?
Likewise the BC546B/BC556B or the KSE340/KSE350?
If so, what would the improvements be and would it be worth the effort to match.
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Old 20th July 2018, 09:50 AM   #347
shaan is offline shaan  India
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Location: Kolkata
Hi Craydive.

While matching is almost always a good thing, I don't think there will be much improvement over non-matched mosfets in cases other than offset stability, and even that is not guaranteed. If you plan to not use the 4 source resistors then matched pairs may be marginally better for current sharing. Overall, there isn't a big enough reason to recommend matched mosfets for v4h.
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Old 20th July 2018, 02:15 PM   #348
J.M.K is offline J.M.K  France
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Join Date: Jan 2009
Location: France
Default Matched transistors deal Q1 Q2 Q9 Q10

Hi,

As I don't own good tools to pair these,
I'm looking for one of you to do it for me this way:
I purchase a bunch of q1 q2 q9 q10, have them
sent directly to you, you make the necessary pairs for 4 boards, and you keep all left for you.
If you have the tools and interested for this, just PM me.
Maybe more people interested?
Hope this will succeed
Cheers
Jmk
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Old 20th July 2018, 02:37 PM   #349
J.M.K is offline J.M.K  France
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Join Date: Jan 2009
Location: France
Quote:
Originally Posted by J.M.K View Post
Hi,

As I don't own good tools to pair these,
I'm looking for one of you to do it for me this way:
I purchase a bunch of q1 q2 q9 q10, have them
sent directly to you, you make the necessary pairs for 4 boards, and you keep all left for you.
If you have the tools and interested for this, just PM me.
Maybe more people interested?
Hope this will succeed
Cheers
Jmk
I just checked at Farnell. They have them all.
Q1 q2 are quite cheap: 13 euros for 100 of each
Q9 q10 are more expensive: 34 euros for 100 of each.

Jmk
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Old 20th July 2018, 02:40 PM   #350
Nisbeth is online now Nisbeth  Denmark
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Join Date: Jan 2001
Location: Denmark
PeeCeeBee V4H GB
Suggestion: Invest in one of these and you'll be able to do basic hfe-matching of BJTs yourself (plus a load of other stuff) - well worth it in the long run

Loads of other options on eBay and other places as well, but the Peak DCA is a great tool.
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