Sure here you go..
It should be noted, however, that this is a somewhat modified F6. Everything should be identical with the exception of increased bypassing on the board itself. Of course, you don't need to use them, and I'm not even sure if I will but I didn't want to rule it out..
As far as thermals I just don't feel that they really help me, but you can turn them on if you want
Also, I had to modify some of the component packages so I don't know if that will be a problem.
It should be noted, however, that this is a somewhat modified F6. Everything should be identical with the exception of increased bypassing on the board itself. Of course, you don't need to use them, and I'm not even sure if I will but I didn't want to rule it out..
As far as thermals I just don't feel that they really help me, but you can turn them on if you want
Also, I had to modify some of the component packages so I don't know if that will be a problem.
I've been examining the PCB along with the schematic at the beginning of this thread and I noticed that 'pins 1,3 and 2,4 (on the Jensen transformer) are tied together on the board but on the schematic 1,2 and 3,4 are tied together. Is this a mistake on the original PCB or am I reading the schematic wrong.
It's pretty important that this is resolved as my design assumes that its 1,2 and 3,4 that are tied together. If not I'll need to remake the board
It's pretty important that this is resolved as my design assumes that its 1,2 and 3,4 that are tied together. If not I'll need to remake the board
my design assumes that its 1,2 and 3,4 that are tied together. If not I'll need to remake the board
Here's the data sheet, showing that 1/2 are connected, and 3/4 are connected,
in order to parallel the primaries, per the original schematic.
http://www.jensen-transformers.com/wp-content/uploads/2014/08/jt-123-flpch.pdf
Can someone please explain what the pros/cons of using a 9.1V zener diode instead of the 5.1V ones shown the schematic around the pots? I am only asking because it seems that the build guide utilizes a 9.1V zener and I was curious why this was done.
The info regarding the gate stopper resistor was very useful. Thanks for the help..
The info regarding the gate stopper resistor was very useful. Thanks for the help..
Finally my turn comes to ask a stupid question, sorry. Maybe 6L6 could respond as he may have the experience in matching the Linear Systems JFETS sold in the store. How close are the LSJ74C Grade to the LSK170B Grades? Is it worth the wait for the store to get stock in or order some C rated fets to match to the LSK170B pieces and live with it? Or, if stock is not forthcoming for quite some time it may be better to have some C's in hand? If they are by your experience to far apart I will wait. I'm not in a hurry. Thanks, Holzarbeiter
Get to work!
Easy...I'm sure Jim is doing all he can do with all the projects he's working on.
Holzar - Wait for matched sets. It won't be too long. Trying to mix a N-channel B with a P-channel C will not work very well at all.
Stopher - Place leads across the 0.47R source resistor and measure DC volts. Adjust the bias pot until you get about .5v . Then zero the DC offset, and re-adjust bias as necessary.
Stopher - Place leads across the 0.47R source resistor and measure DC volts. Adjust the bias pot until you get about .5v . Then zero the DC offset, and re-adjust bias as necessary.
Guys, if any of you are having access issues (not able to access a post or move on to the next page etc then you need to clear your browser cache of all old temp files. I only use IE but Firefox and other browsers will be similar.
http://www.diyaudio.com/forums/foru...act-details-certain-profiles.html#post3918620