Have a look at post 10206 of the F5 Power Amplifier thread. http://www.diyaudio.com/forums/pass-labs/121228-f5-power-amplifier-1021.html#post2453437. The resistors are inside of shrink tube.
DOH!
Cviller: I just orders some PSU boards and forgot the Rectifier boards. Do you mind canceling my order so that I can re-do it with the Rectifiers? That way I won't get smacked with shipping twice.
If it's not possible or you don't get this in time, no big deal.
Cheers!
Cviller: I just orders some PSU boards and forgot the Rectifier boards. Do you mind canceling my order so that I can re-do it with the Rectifiers? That way I won't get smacked with shipping twice.
If it's not possible or you don't get this in time, no big deal.
Cheers!
cviller:
You can ignore my last post. It will be easier for both of us if pick up some rectifier blocks instead!
Sorry for the confusion. 🙄
You can ignore my last post. It will be easier for both of us if pick up some rectifier blocks instead!
Sorry for the confusion. 🙄
Hi ,
I am in a bit of a mess with the F5 project. I purchased my boards back in September 2009. I have only just got around to (starting) to build them... too many other projects.
Firstly I have found that the resistors provided do not match what is on the F5 BOM (from TechDIY). I was about to ask for replacements when I found that I do not have a current schematic showing what resistor values are actually wanted (this is a V1.0a 2009-03-14 board.)
Can anyone point me to a schematic for the V1.0a which defines which resistors should have been provided?
Thanks for the help
I am in a bit of a mess with the F5 project. I purchased my boards back in September 2009. I have only just got around to (starting) to build them... too many other projects.
Firstly I have found that the resistors provided do not match what is on the F5 BOM (from TechDIY). I was about to ask for replacements when I found that I do not have a current schematic showing what resistor values are actually wanted (this is a V1.0a 2009-03-14 board.)
Can anyone point me to a schematic for the V1.0a which defines which resistors should have been provided?
Thanks for the help
Cross-Post.. cross-confusion
Hi,
thanks for the fast response / ticking off.
There is a reason for the cross posting.. I was hoping to pick up on all the changes as discussed in the various forums, not just those specific to your boards.
The boards, as delivered, have missing resistors, as well as wrong value resistors and resistors which physically do not fit on the board. Before resoldering and/or reorderingI need to be pretty sure of what should be there.. hence the cross posting.
After a certain point the size and scope of forums become very hard to manage when seeking a definitive definition of components. It would useful to have a "sticky" area in your blog to make this definition... as it is we are all reduced to searches which often return references to missing or outdated documents. In the professional world we would put all this under the heading of Configuration Management .... tedious but essential
best regards
George
Hi,
thanks for the fast response / ticking off.
There is a reason for the cross posting.. I was hoping to pick up on all the changes as discussed in the various forums, not just those specific to your boards.
The boards, as delivered, have missing resistors, as well as wrong value resistors and resistors which physically do not fit on the board. Before resoldering and/or reorderingI need to be pretty sure of what should be there.. hence the cross posting.
After a certain point the size and scope of forums become very hard to manage when seeking a definitive definition of components. It would useful to have a "sticky" area in your blog to make this definition... as it is we are all reduced to searches which often return references to missing or outdated documents. In the professional world we would put all this under the heading of Configuration Management .... tedious but essential
best regards
George
5 f pcb in dual mono configuration
Sir(s) yet another request for a F5 PCB and rectifier however i would like to build them as monoblocks so how may i pay for two Amp and 2 Pcb (don’t have a pay pal account or credit card
)
Sorry to be awkward- and thanks johnny555
Sir(s) yet another request for a F5 PCB and rectifier however i would like to build them as monoblocks so how may i pay for two Amp and 2 Pcb (don’t have a pay pal account or credit card
)Sorry to be awkward- and thanks johnny555
Which trim pots?
There's lots of different mounting styles for trim pots, which one fits the P-F5-2V20 boards properly?
Thanks
Roscoe
There's lots of different mounting styles for trim pots, which one fits the P-F5-2V20 boards properly?
Thanks
Roscoe
The normal small blue ones work fine - pins are fairly close and in line or in a v shape (there is an extra middle one). I can't remember the exact package code.
Hi,
the advantage of 3pins inline (sil), is that one can orient the VR to enable which direction you prefer to turn to make an adjutment.
The disadvantage of the 3pins inline, is that one can insert it the wrong way.
The advanatge of 3pins offset, is that one cannot insert it the wrong way.
The disadvantage is that the designer might have a different idea from the user on which is the preferred way to adjust.
the advantage of 3pins inline (sil), is that one can orient the VR to enable which direction you prefer to turn to make an adjutment.
The disadvantage of the 3pins inline, is that one can insert it the wrong way.
The advanatge of 3pins offset, is that one cannot insert it the wrong way.
The disadvantage is that the designer might have a different idea from the user on which is the preferred way to adjust.
Last edited:
I measured mine before I soldered them in the board to make sure they were zeroed out while all the way counterclockwise, It's been a year since I assembled the boards. I still haven't finished the amplifier though.
F5
Hi CViller!
I got your boards F5C V2. Can I use them for the normal F5, 25Watt? And I heard that the ztx 550/450 that I have, has to be for Q5, the round part in front and for Q6, the round part to the back? Is that right? Thanks for the answer. Grtz Teake
Hi CViller!
I got your boards F5C V2. Can I use them for the normal F5, 25Watt? And I heard that the ztx 550/450 that I have, has to be for Q5, the round part in front and for Q6, the round part to the back? Is that right? Thanks for the answer. Grtz Teake
Thanks neoinc! 🙂
Teake, if you have questions not answered in the F5 blog post, please let me know.
Teake, if you have questions not answered in the F5 blog post, please let me know.
F5
Hi Cviller!
I put the boards together, the F5c version from you, and got to much voltage on the output, 0,1 volt, and the powertransistors are getting very stinky hot. For R1 and R2 I got 10 watt 10 ohm resistors. Is it possible that the wattage from those transistors is to high? And are there maybe connecting points that I( missed, because I am using this board only for F5 purpose, and not for the Turbo version. Thanks for the answer. I think I got Q5 an Q6 right now an also P1 and P2.
Hi Cviller!
I put the boards together, the F5c version from you, and got to much voltage on the output, 0,1 volt, and the powertransistors are getting very stinky hot. For R1 and R2 I got 10 watt 10 ohm resistors. Is it possible that the wattage from those transistors is to high? And are there maybe connecting points that I( missed, because I am using this board only for F5 purpose, and not for the Turbo version. Thanks for the answer. I think I got Q5 an Q6 right now an also P1 and P2.
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