what was the question ?
Whether or not Kristijan K ever responds to email inquiries? That question?
Hi! Alex i assume kk is KK pcb.
However I do not understand what does KK PCB in this thread too.
However I do not understand what does KK PCB in this thread too.
what is having KK with this thread ?
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Hi!Mr.Db.
I, too, initially was a little confused, but looking wiring diagrams also a child be able to
understand that the Pumpkin and Shunty topologies are significantly better.
I, too, initially was a little confused, but looking wiring diagrams also a child be able to
understand that the Pumpkin and Shunty topologies are significantly better.
After a number of weeks I'm inclined to give up. Unless someone knows different...
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My unfinished Pumpkin Clones. I hope Choky don't mind (It easy to ask forgiveness than ask permission)
Didiet
An externally hosted image should be here but it was not working when we last tested it.
Didiet
Led string tested with voltage 11.8V, led light up, so i guest led orientation not wrong. Led Vf=1.97V.
Didiet
I was looking last night at your pcbs and I still can't find what's wrong
will try harder
ZM. how was it with bords for dis thing?
still waiting for Paypal in Serbia
most probably in a month or two , but even then I can't be sure will they include receive money option from start
Because i just use LTSpice to sim Led String CCS, and i got 5V, maybe my sim not right.
Update : i lift Gate resistor of CCS output (Q6 and Q8), Led String light up, measure it 11,4V. Howto check mosfet, good or bad ? check with my ohm meter pin G-S i got 220 ohm ( on both Channel, Q6 and Q8)
Update : i lift Gate resistor of CCS output (Q6 and Q8), Led String light up, measure it 11,4V. Howto check mosfet, good or bad ? check with my ohm meter pin G-S i got 220 ohm ( on both Channel, Q6 and Q8)
I was looking last night at your pcbs and I still can't find what's wrong
will try harder
still waiting for Paypal in Serbia
most probably in a month or two , but even then I can't be sure will they include receive money option from start
aha. bummer. they need some
Q6 and Q8 are faulty. Replace quad of them. On one channel, i can set the offset betwen - gnd and + gnd to get 20mV. Betwen - and + i get 2mV.
On the other chanel i only can get - gnd, + gnd 16V. Betwen - + 2 Volt.
I think Q9 fault too. I'll check again tomorrow
Didiet
On the other chanel i only can get - gnd, + gnd 16V. Betwen - + 2 Volt.
I think Q9 fault too. I'll check again tomorrow
Didiet
Attachments
2sj310 matching
Hi at all! Please i just make the matching of 2sj310 (Q1 and Q2) jfet of Pumpink with Zen mod's circuit matcher.
I have found those values of Vgs:
180-184-(187-188)-(193-196) mV so i have match as in parenthesis.
I have to ask you your comments for results.
The current draw is set to 5mA for five minutes test time.
In addition I also bought some 2sj109 used (for future aleph j babbelfish project), can you suggest a method to test their genuineness?
Please can you let me know?
In attached some pictures please to know some comments for results.
Hi at all! Please i just make the matching of 2sj310 (Q1 and Q2) jfet of Pumpink with Zen mod's circuit matcher.
I have found those values of Vgs:
180-184-(187-188)-(193-196) mV so i have match as in parenthesis.
I have to ask you your comments for results.
The current draw is set to 5mA for five minutes test time.
In addition I also bought some 2sj109 used (for future aleph j babbelfish project), can you suggest a method to test their genuineness?
Please can you let me know?
In attached some pictures please to know some comments for results.
Attachments
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