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Old 7th January 2013, 03:27 PM   #11
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I was hoping for this to pick up a bit more maybe if you get in touch with neighbours by pm using GB subscription list we get more response?

Any way mesured the 327 I got with group buy and I got 13 with Hfe around 400 9 with 410

The center of the batch is about 350 so somebody there got my lot 0f 400 Hfe NPN
Only 4 or 5 PNP transistors from GB are between 420 and 450 Hfe
I just scrape troug making 2 set of boards

The GB NPN are centered at about 450

From Fairchild I got loads of 327 40 around 560
Loads of 337 around 500

Let me know if any of those are of any use

Quan sorry for delay I am going to sort them out and send them over by next week please PM your address
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File Type: jpg BC32740 GB.jpg (980.8 KB, 262 views)

Last edited by Bksabath; 7th January 2013 at 03:29 PM.
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Old 7th January 2013, 07:58 PM   #12
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Hi quan tanks for PM
I will see what I can do but most of my 327 are far to hi or far to low.
I will do my best to sort some out for you.
In the mean time.
1)set up for testing Just a 317 at 5 V (5.0022 today) and a few resistors
There is going to be same tollerance there but is consistant so good enoug
2) Line up the litle soldiers so they go up to temperature on the bread board.
3)over view of meterand thermometer.
4)from now on use pliers to handle the transistors and place them on test point this save loads of time
5)batch ready is going out tomorow.
6)that lamp in there is to keep the lot at a steady temperature (22 C today)
Just move the lamp in out in out to set decent working conditions for the transistors in the mean time I got frost bite on my toes as I work in a cold loft
Attached Images
File Type: jpg Litle soldiers 001.jpg (731.7 KB, 243 views)
File Type: jpg Litle soldiers 002.jpg (939.6 KB, 228 views)
File Type: jpg BCxxx-40 003.jpg (977.8 KB, 146 views)
File Type: jpg Litle soldiers 004.jpg (976.0 KB, 127 views)
File Type: jpg Litle soldiers 005.jpg (977.8 KB, 33 views)
File Type: jpg Litle soldiers 003.jpg (985.3 KB, 33 views)
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Old 8th January 2013, 04:22 AM   #13
GaryB is offline GaryB  United States
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Location: Silicon Valley
Quote:
Originally Posted by GaryB View Post
BC327
  1. 290-320: 49
  2. 320-330: 90
  3. 330-340: 82
  4. 340-350: 28
  5. >375: 3

BC337
  1. 420-439: 6
  2. 440-449: 21 (all used for my build)
  3. 450-459: 23 (7 used for my build)
  4. 460-469: 42
  5. 470-479: 57
  6. 480-489: 50
  7. 490-499: 20
  8. 500-509: 17 (8 used for my build)
  9. 510-549: 13
OK - I got another set of BC327-40 transistors from Mouser. I got 50 of the On Semi devices and 200 of the Fairchild. Here's how they measure.
  • <345: 28
  • 350-359: 37
  • 360-369: 13
  • 370-379: 24
  • 380-389: 29
  • 390-399: 13
  • 400-409: 14 (12 used for my build)
  • 410-419: 16 (all used for my build)
  • 420-429: 7
  • 430-462: 8
  • 480-499: 3
  • 500-509: 4 (used for my build)
  • 510-519: 4 (used for my build)
  • 520-530: 2
  • 530-539: 11
  • 540-549: 10
  • 550-559: 9
  • 560-569: 7
  • 570-590: 5
  • >590: 3

So based on this set of devices, I think I can build up my Paradise. I'll use 8 PNPs with hfe between 500 and 520 and 8 NPNs between 500 and 510 for the input devices.
The current mirrors will be built with 28 PNPs with hfe between 400 and 420 and 28 NPNs with hfe between 440 and 460.

The transistors not listed as being used for my build are available if they'd be of use to others.

Thanks,
---Gary
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Old 8th January 2013, 08:13 AM   #14
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Hi guys,

I started a thread some months ago at Holgers homepage about the trannies. There i posted my list of messurement of the GB bags:
http://www.abload.de/img/hfe61rs1.jpg
My Messurement was at about 20-22 °C in living room. (believe me the WAF is nearly zero) I used an Atlas and after I realised, that temperatur is a not to underestimated fact, i grabed the tiny legs only by the (blue, red, green) pincers. And for some unknown reason i take always leg 1 with red, leg 2 with green an the third leg with blue. Why? Dont know! But for each tran the same terms and conditions.
I only messured once, so the temperatur couldnīt be raised up.
So if you would like to swap someof mine (please let me the 73 pieces of BC 337 between 443 and 461, because I have to build up two sets for me and another "Paradiser").

I need >72 pieces of BC327 in range between 440 and 460 hfe.

Feel free to ask and offer.

And as Bksabath mentioned it is only the Postal rate, nothing more. I think the same way. we are all DIYers and there is no need for profit.

@ Bksabath thanks for offering this thread.

Libby123
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Old 8th January 2013, 02:59 PM   #15
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You welcome Libby
Just came back from Sheffild to drop off same BC337
I had a chance to see a sample mesured up with different Atlas from one I have and it did mesure around 496 compared to 500 to 510 of the batch so peanuts.
Most probably tollerance of the resistor I am using on the rig but this is consistant for the lot so the transistor will actualy match.

I like the litle rig as instead of taking just one reading one see the voltagge "Hfe" change as transistor setle

I was hoping for this tread to pick up a bit more so If you know someone near You that is also building the paradise get in touch.
BC327 Hfe 440 to 460 sorry I don't have
You welcome
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Old 9th January 2013, 10:21 AM   #16
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thanks for reply.
So the atlas is realy useful. Easy to use for a novice. To get some more swappers, i linked this thead to Holgers forum in german language. So maybe there are others to join. I also offered to open up a german thread for swap BCxxx for those who have difficulties with english language. Maybe i have to translate a little.
no 440-460: Its no necessary to apologise. If there is any other swapper: donīt hesitate.
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Old 9th January 2013, 09:01 PM   #17
studeb is offline studeb  United States
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Quote:
Originally Posted by GaryB View Post
OK - I got another set of BC327-40 transistors from Mouser. I got 50 of the On Semi devices and 200 of the Fairchild. Here's how they measure.
i know it is not a big sample size, but what was the spread of the on semi and the fairchild you got?
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Old 10th January 2013, 03:35 AM   #18
GaryB is offline GaryB  United States
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The On Semi parts were all hfe >500. 46 of the 50 were > 520. There were 4 between 500 and 520. The rest of the parts in my list were the Fairchild parts. Most of the Fairchild parts had hfe between 350 and 420 with a tail below 350 and a similar tail > 420.
---Gary
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Old 11th January 2013, 08:42 PM   #19
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Just got this today

Quote >
Hello!
Do you have complete matched transistor-sets for sale? Would like a set...in the middle-range...
regards

Sory post what you have and what you need maybe some one near you can help

But only if we all stick togheter and help each other out Yes?
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Old 13th January 2013, 09:23 PM   #20
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Pics of my test setup. Once my build is complete, I will be glad to share.

Pierre
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