UGS adventures

Hello generg
I just check now , yes I received a message 17,57Euro .
The problem if I have to do bank transfer from Canada that cost me extra $50CAD .
I only can send the payment via pay pal !
Do someone has any idea what I can do.
The bank transfer cost me twice than the payment for the PC boards .
Greetings gabor
 
Dear friends,
looking at the pcb layout of Simple AlimUGS (PCBs groupbuy on HCFR) it looks like LM336s have their pin swapped (must be mounted reversed).
Please look at the attached files, here's the datasheet: http://www.national.com/ds/LM/LM236-5.0.pdf
Am i wrong?
 

Attachments

  • Stuffing.pdf
    Stuffing.pdf
    90.2 KB · Views: 178
  • AlimUGS2.gif
    AlimUGS2.gif
    27.1 KB · Views: 718
Dear friends,
looking at the pcb layout of Simple AlimUGS (PCBs groupbuy on HCFR) it looks like LM336s have their pin swapped (must be mounted reversed).
Please look at the attached files, here's the datasheet: http://www.national.com/ds/LM/LM236-5.0.pdf
Am i wrong?

The data sheet shows a view from the bottom, therefore looking at the PCB, with the flat side to the top, the pin on the right is the adj pin.
 
Hello
I would like to know if I can use Toshiba 2SA970BL & 2SC2240BL to replace the ZTX450 & ZTX550 ?
I have at least 80pair BC550C & BC560C but impossible to match them . Specially to match the PNP to NPN .
I have some 50 pair Toshiba at hand with much closer hFE ratings . I can match those easily .
I know the Toshiba semis has different pin-out but I will take care about that if is a good substitute !
Thanks for the help .
Greets
 
Last edited:
Hello
I would like to know if I can use Toshiba 2SA970BL & 2SC2240BL to replace the ZTX450 & ZTX550 ?
I have at least 80pair BC550C & BC560C but impossible to match them . Specially to match the PNP to NPN .
I have some 50 pair Toshiba at hand with much closer hFE ratings . I can match those easily .
I know the Toshiba semis has different pin-out but I will take care about that if is a good substitute !
Thanks for the help .
Greets


No reason why you can't if you take into account the different pin-out 😀
 
Hello
Thanks Zen Mode !😀
The BC550C & 560C has a hFE rating from 400-680 . That is the reason I can not match them .
When I want to much 5pair /channel it is impossible . All different hFE I get . Top of that they produced at least 3 different company .
The Toshiba device has much closer hFE to each other , it is around 500 hFE .
I'm tired to buy more BC, just waste of money.
At least I know the 2SA & 2SC all Toshiba product .
I just don't want to end up with a big offset .
Thanks one more time
Thanks Itsmee to you to!
Greets
 

Attachments

  • IMG_0001.JPG
    IMG_0001.JPG
    76.9 KB · Views: 745
  • IMG_0002.JPG
    IMG_0002.JPG
    75.4 KB · Views: 735
  • IMG_0004.JPG
    IMG_0004.JPG
    78.7 KB · Views: 729
  • IMG_0003.JPG
    IMG_0003.JPG
    56.5 KB · Views: 717
Last edited:
Hello
Thanks Zen Mode !😀
The BC550C & 560C has a hFE rating from 400-680 . That is the reason I can not match them .
When I want to much 5pair /channel it is impossible . All different hFE I get . Top of that they produced at least 3 different company .
The Toshiba device has much closer hFE to each other , it is around 500 hFE .
I'm tired to buy more BC, just waste of money.
At least I know the 2SA & 2SC all Toshiba product .
I just don't want to end up with a big offset .
Thanks one more time
Thanks Itsmee to you to!
Greets

I didnt realise you had to match them, are they matched in pairs?
If you buy a gazillion of them and match, I'd buy a couple of sets of you😀
 
Hello
I do not buy more BC550C & 560C just a waste of money .
Probably if I would buy 250-300 pair I could get 2x5 matched pairs .
I go with the Toshiba device , those has much close hFE to each other plus PNP much closer to the NPN !
Some guy wrote not so important to much the BJT-s but I feel better if they are matched .
Greets