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Old 18th September 2011, 03:13 PM   #481
EUVL is offline EUVL  Europe
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I have another update for you.

Mark has inspected all parts for the case yesterday. They are now off to anodising.
I shall get to inspect them personally end of the month before bulk shipment.

So hopefully just make X'mas.





Patrick
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Old 18th September 2011, 04:13 PM   #482
Horio is offline Horio  United States
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Excellent!
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Old 20th September 2011, 01:07 AM   #483
EUVL is offline EUVL  Europe
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I just reviewed the 3-point JFET matching data for one test team member.

As expected, good matches for 2SK170s, quite a bit of variations with 2SJ74.
This proofs the importance of transconductance match especially for P-JFETs.

See also post#402.


Patrick
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Old 20th September 2011, 09:27 AM   #484
JBdV is offline JBdV  Netherlands
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Who did the testing ? So I can send a PM, Jan
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Old 20th September 2011, 03:33 PM   #485
EUVL is offline EUVL  Europe
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Replied by email.

Patrick
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Old 30th September 2011, 04:34 PM   #486
EUVL is offline EUVL  Europe
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AndrewT please kindly check email.


Thanks,
Patrick
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Old 3rd October 2011, 01:00 AM   #487
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I have another piece of good news for you.

A test team member has his proto fired up and working.
So the PCBs should be OK, thanks to Dave's immaculate work.
I shall release them next weel to the forum so that you can pre-order.

As you can see he is not using the current limiting circuit.
He is also on a special mission to test other output devices other than 2SK1530/2SJ201.
Distortion measurements next week if he can find time.

Herzlichen Dank Uwe.

The schematics of the standard circuit will be released once it has been tested.
I am busy arranging that right now.

Greg, please kindly get in touch by email.


Patrick
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File Type: jpg 111003 Uwe Proto 1.jpg (221.4 KB, 670 views)
File Type: jpg 111003 Uwe Proto 2.jpg (242.6 KB, 648 views)
File Type: jpg 111003 Uwe Proto 3.jpg (222.3 KB, 570 views)
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Old 3rd October 2011, 01:14 AM   #488
Horio is offline Horio  United States
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Email sent.
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Old 3rd October 2011, 01:37 AM   #489
EUVL is offline EUVL  Europe
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Replied to both you and AndrewT.


Patrick
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Old 3rd October 2011, 04:40 AM   #490
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Very Exciting!

Thanks Uwe and Patrick for the first look.

Dave
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