This is the best news this month for me 🙂
Carry on with your work mr. Nelson !
best regards,
Leon
Carry on with your work mr. Nelson !
best regards,
Leon
Digikey part numbers
On the parts list, capacitor C3 is shown with a digikey part number of 4773 -ND. I believe the correct part number is P4785-ND for a .001uF 5% 100WV polyester cap.
Also, when entering part number P1246-ND for caps C5,C6,C7,C9,C11 digikey gives an error. I haven't had time to look it up yet.
Someone please double check my numbers ...
On the parts list, capacitor C3 is shown with a digikey part number of 4773 -ND. I believe the correct part number is P4785-ND for a .001uF 5% 100WV polyester cap.
Also, when entering part number P1246-ND for caps C5,C6,C7,C9,C11 digikey gives an error. I haven't had time to look it up yet.
Someone please double check my numbers ...
You are right about the C3, and the correction is being made,
thanks.
P1246 does seem to be a correct part for 220 uF @ 50 V, tho
thanks.
P1246 does seem to be a correct part for 220 uF @ 50 V, tho
Zen 4
Ah Ha! A ZVP3310 follower as an input buffer. Just as I thought from looking the PCB teaser preview. Cool man......
H.H.
Ah Ha! A ZVP3310 follower as an input buffer. Just as I thought from looking the PCB teaser preview. Cool man......
H.H.
Digikey part numbers
Digkey has part number P1246-ND as obsolete/discontinued.
(caps C5,C6,C7,C9,C11)
Now I know why it gave an error when I tried to order it.
Panasonic/ECG part number is ECE-A1HFS221
Still don't have time to look up a equiv. part number !!
Again, someone please double check my findings...
Digkey has part number P1246-ND as obsolete/discontinued.
(caps C5,C6,C7,C9,C11)
Now I know why it gave an error when I tried to order it.
Panasonic/ECG part number is ECE-A1HFS221
Still don't have time to look up a equiv. part number !!
Again, someone please double check my findings...
Page 6 (pdf), the following line:
Adjust R0 so that the Drain voltage of Q1 is 1⁄2 the regulated voltage plus about 2 volts.
should read as:
Adjust R4 so that the Drain voltage of Q1 is 1⁄2 the regulated voltage plus about 2 volts.
Adjust R0 so that the Drain voltage of Q1 is 1⁄2 the regulated voltage plus about 2 volts.
should read as:
Adjust R4 so that the Drain voltage of Q1 is 1⁄2 the regulated voltage plus about 2 volts.
ZV4 Balanced Channels: Couple of questions
1. ZV4 article does not mention anything about transistors being matched. Do they need to be matched? If yes, match Q1 and Q2 only?
2. Power output for ZV4 in balanced mode is pretty much similiar to Aleph 5. Would the construction cost for ZV4 and Aleph 5 be about the same? Might some of the experienced DIYers know already from the top of the head?
3. For each balanced channel (I understand it'll need 2 boards), is it just a matter of connecting the two V+ together and the Grounding together from the 2 boards? The 2 inputs on the 2 boards would be connected to the plus and minus of the XLR input?
4. Now for the power supply, assuming we're using 2 transformers for unbalanced channels, how many transformers are required for balanced channels (and how are the secondary wires connected)?
1. ZV4 article does not mention anything about transistors being matched. Do they need to be matched? If yes, match Q1 and Q2 only?
2. Power output for ZV4 in balanced mode is pretty much similiar to Aleph 5. Would the construction cost for ZV4 and Aleph 5 be about the same? Might some of the experienced DIYers know already from the top of the head?
3. For each balanced channel (I understand it'll need 2 boards), is it just a matter of connecting the two V+ together and the Grounding together from the 2 boards? The 2 inputs on the 2 boards would be connected to the plus and minus of the XLR input?
4. Now for the power supply, assuming we're using 2 transformers for unbalanced channels, how many transformers are required for balanced channels (and how are the secondary wires connected)?
print help
can´t print the article!
the only thing the printers do is print
error:ioerror, offending command: Startdata
STACK:
()
-filestream-
-savelevel-
this happens on several printers, part3 is no problem at all.
any ideas????😕
william
can´t print the article!
the only thing the printers do is print
error:ioerror, offending command: Startdata
STACK:
()
-filestream-
-savelevel-
this happens on several printers, part3 is no problem at all.
any ideas????😕
william
😀 😀 😀
Been waiting for this for a loooooong time 😎
BTW, is there any chance of getting the PCB foil patterns as an image file? I have the ability to make PCB's from images 😛
If not, how would I go about getting a pair of PCB's in the UK?
Been waiting for this for a loooooong time 😎
BTW, is there any chance of getting the PCB foil patterns as an image file? I have the ability to make PCB's from images 😛
If not, how would I go about getting a pair of PCB's in the UK?
Check out http://www.passdiy.com/amps.htm for Gerber files to get your own pcbs made. Shipping is $20 for international.
printing
William ... Did you tried to print straight from the web page (one screen at a time)? If that don't work, I can't help you.
William ... Did you tried to print straight from the web page (one screen at a time)? If that don't work, I can't help you.
kit?
If I'm not mistaken, isn't this suppose to be the first amp kit from Pass Labs where pcbs, parts, heatsink, etc will be available as a kit? For now, I only see pcb for sale. A complete kit will be available in the near future? Nelson Pass has mentioned (last year?) that he's considering selling the Heatsink to the public .... which got some of us excited. I'm assuming it's for ZV4. Am I just totally mistaken?
If I'm not mistaken, isn't this suppose to be the first amp kit from Pass Labs where pcbs, parts, heatsink, etc will be available as a kit? For now, I only see pcb for sale. A complete kit will be available in the near future? Nelson Pass has mentioned (last year?) that he's considering selling the Heatsink to the public .... which got some of us excited. I'm assuming it's for ZV4. Am I just totally mistaken?
Print no problem
William,
I print the whole PDF doc with no problem.
I saved the PDF file first and then check the print as image button in the print panel.
Give it a try.
Chris
William,
I print the whole PDF doc with no problem.
I saved the PDF file first and then check the print as image button in the print panel.
Give it a try.
Chris
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