The text is obviously in German: the price is per lot of 25 pieces, plus shipment, so 0,67 euro or roughly 1 $ per JFET. I think that is not too bad, especially considering this is a well know local supplier and you still get the original and not any fakes, plus they have J74BL as well. One caveat: They did often not respond to orders from outside Germany, at least in the past, but their ebay auctions say they ship worldwide.
Edit: should have read more carefully as someone replied to this before me ...
Yeah well, i've never had any problems communicating with Mr Rother. Neither by regular or web mail and i've bought his items from day-1, when he was selling parts through ads in mags like Klang&Ton and the likes.
The additional costs of handling/shipment are pretty steep for orders outside of the empire, even more so before the internet banking era, which makes small time orders rather expensive.
The low shipment cost level of the Schuro E-bajo business fills that gap, good niche market.
The additional costs of handling/shipment are pretty steep for orders outside of the empire, even more so before the internet banking era, which makes small time orders rather expensive.
The low shipment cost level of the Schuro E-bajo business fills that gap, good niche market.
So I guess the V part is not suitable . Using the LSK389 until today , they where getting rather hot . Then I knew that linearsistem is makin them 3 types A, B an C . Something like the Gr , Bl and Vl .
Mine infact are C types obtained as samples .
So I matched some 2sk170 BL and voilà . They sound kind better .
Mine infact are C types obtained as samples .
So I matched some 2sk170 BL and voilà . They sound kind better .
The B1 has following component changes due to on hand part availability issue:
R1 = 0.47R
C1 = C2 = 1500uf 35V
D1 use green LED
R202/R204/R102/R104 = 680R
C100/C200 use 0.47//0.68uf film cap
P200 / P100 = 10kA type Alps
C101/C201 = BG 10uf 50V N series
K170BL use 8.2mA Idss.
Cheers.
R1 = 0.47R
C1 = C2 = 1500uf 35V
D1 use green LED
R202/R204/R102/R104 = 680R
C100/C200 use 0.47//0.68uf film cap
P200 / P100 = 10kA type Alps
C101/C201 = BG 10uf 50V N series
K170BL use 8.2mA Idss.
Cheers.
Attachments
Re: 25V caps
feed them from 30Vdc with a series 100k resistor to limit the maximum current while the insulator reforms. You can measure the leakage current through the cap after a couple of hours by monitoring the voltage drop across the 100k resistor.
Maybe reform for half a day, then put to full voltage duty.
For any that suffer a high leakage, try reforming for a couple of days and recheck or throw them away.
it might be belt and braces but since you plan to run them at near maximum voltage consider reforming them before connecting to the PSU.Diomedian said:
feed them from 30Vdc with a series 100k resistor to limit the maximum current while the insulator reforms. You can measure the leakage current through the cap after a couple of hours by monitoring the voltage drop across the 100k resistor.
Maybe reform for half a day, then put to full voltage duty.
For any that suffer a high leakage, try reforming for a couple of days and recheck or throw them away.
