@Do you know what are the two white boxes sticking to the sides of the amp near the driver tubes?
It could by resistors it have to be resistors but why he used big ceramic one ? maybe someone who have the other version of LF339 with 6c5 driver will know?
@Also how is called what is used to solder the resistor network?
Solder terminal strips.
the diodes used in keph modded LF339 are very fast rectifying diode VISHAY BYW type very popular in use in switched-mode power supply, but my choice will be Schottky
I double checked and the cathode resistor is 470 ohm, but mills 430 ohm resistor was used in one of modded lf339 too.
Thank you a lot WAAL-E!! I now see a lot clearer in this amp! I was sure I responded last night but here it is again! Thanks for the schematic! I'm glad the SCR 250V is right because nothing else fits in there hehe!
So there is not imput cap? Isn't it strange or a genius of a design? Do you know what are the two white boxes sticking to the sides of the amp near the driver tubes?
I have bought some 2200pF teflon caps and 0.5µF KP caps in order to experiment with bypassing, a lot of fun in sight!
Thanks again for the diagram! I ask Yuking team about it, but they never responded...
I have something that I need to ask :
What is are the two soldering card for and what are the components on them?
Also in Keph modded 339:
What are the diodes for (on the soldering card next to the 2000pF capacitors)? I assume the tiny caps are for decoupling the power filter? The diodes are needed if I want to bypass my power filter too?
Also how is called what is used to solder the resistor network? I need to order that part but I cannot find it unfortunately.
BTW thanks for the calculation of the resistor but I remembered my high school days yesterday and found this as well. Appart from that my resistor is 470ohms 50w, not sure why he change the value except that availability of parts...
Edited by WALL-E - 5/29/12 at 3:07pm