If you keep the part in a socket for too long, it will surely get hot.
I place all the parts on a table, let the temperature stabilize over an hour or so. Then I do the measurements by quickly inserting the part, reading the voltage and off it goes. No need for heatsink.
I place all the parts on a table, let the temperature stabilize over an hour or so. Then I do the measurements by quickly inserting the part, reading the voltage and off it goes. No need for heatsink.
Hi Peter,
the F3-Boards arrived yesterday. 🙂
They look really great. Thank you very much.
Greetings,
Chris
the F3-Boards arrived yesterday. 🙂
They look really great. Thank you very much.
Greetings,
Chris
I have decided not to embark on building two F3s so if anyone is interested, here are the parts I have assembled so far. I posted this on Trading Post as well.
FS: Parts that can be used for building two F3 stereo amps:
2 ea Plitron 200734 transformers (2x18VAC) from group buy http://www.diyaudio.com/forums/show...threadid=104773
10 ea matched Lovoltech LU1014D power JFET from http://www.diyaudio.com/forums/show...&threadid=71633
Two F3 amp boards and two F3 rectifier boards (4 boards of each) which is enough to build two stereo F3 amps from http://www.diyaudio.com/forums/show...threadid=103535
Everything just as I received it. Selling as 1 lot for the exact prices I paid for them - $228.91 plus shipping (lower 48 only)
gab
FS: Parts that can be used for building two F3 stereo amps:
2 ea Plitron 200734 transformers (2x18VAC) from group buy http://www.diyaudio.com/forums/show...threadid=104773
10 ea matched Lovoltech LU1014D power JFET from http://www.diyaudio.com/forums/show...&threadid=71633
Two F3 amp boards and two F3 rectifier boards (4 boards of each) which is enough to build two stereo F3 amps from http://www.diyaudio.com/forums/show...threadid=103535
Everything just as I received it. Selling as 1 lot for the exact prices I paid for them - $228.91 plus shipping (lower 48 only)
gab
Peter Daniel said:
Ho no!!! I've just been away for a few days......
Do you have any idea if you'll order more PCBs?
Thanks,
Luis
Yep, same for me..... No luck !
Peter, is it possible to get 2 PCB for the PS ? Al least i could get them !!!!😉
In case it's not possible to get somme F3 PCBs, is it possible to find files to do them myself...?
Peter, is it possible to get 2 PCB for the PS ? Al least i could get them !!!!😉
In case it's not possible to get somme F3 PCBs, is it possible to find files to do them myself...?
Parts
I have my PCB's and I am looking for part, probably a little late. I can not locate the LU1014. I missed the group buy and as far as I can determine there is no other place to find them. Does anyone have a suggestion. I think I am able to manage with everything else, although a case and heatsink recomendation would be nice
Tom
I have my PCB's and I am looking for part, probably a little late. I can not locate the LU1014. I missed the group buy and as far as I can determine there is no other place to find them. Does anyone have a suggestion. I think I am able to manage with everything else, although a case and heatsink recomendation would be nice
Tom
Any F3 boards still available?
I'd like a set if there are. You can contact me offline at larryfisher1@mac.com
Thanks!
I'd like a set if there are. You can contact me offline at larryfisher1@mac.com
Thanks!
The F3 boards are all gone. You may start another wiki list and if there is an interest in 50 boards I can arrange for another run. But were will you get the Lovoltechs from?
You could also post an ad in Trading Post for F3 PCBs and Lovoltechs, I'm pretty sure not everybody will be using them.
I still have F4 and PS boards available.
You could also post an ad in Trading Post for F3 PCBs and Lovoltechs, I'm pretty sure not everybody will be using them.
I still have F4 and PS boards available.
Burning Amp will have created some demand for F3 / Zen v9...
Since Mr. Pass so kindly passed out some Lovoltech transistors and mosfets and things, I'm sure there will be a spike of interest...
I'd love to acquire a set of F3 / Zen v9 boards and join in the fun, but I don't know how to go about getting them made. I'd be happy to help with logistics if someone else can guide me.
Regards,
tim
Since Mr. Pass so kindly passed out some Lovoltech transistors and mosfets and things, I'm sure there will be a spike of interest...
I'd love to acquire a set of F3 / Zen v9 boards and join in the fun, but I don't know how to go about getting them made. I'd be happy to help with logistics if someone else can guide me.
Regards,
tim
Hey all !
It's recently come to my attention that this F3 amp I'm about to build (parts aren't cheap !), only has 13db gain, meaning I'm probably going to need a decent active preamp in front of it (I wanted to take the TVC path, but even with +6 db gain, it may not be enough, considering most phono stages only put out 0.5V).
Before I start work on a preamp (I'm thinking about a BoZ, or the Jfet variant), would there be any problems increasing the gain of the amp by fiddling with the resitistor ratios (R1 and R2) ?
I was also toying with building a non-feedback version of this amp, by using the the input described in the ZenV9 document (fig. 4). What would the gain be taking that path ?
It's recently come to my attention that this F3 amp I'm about to build (parts aren't cheap !), only has 13db gain, meaning I'm probably going to need a decent active preamp in front of it (I wanted to take the TVC path, but even with +6 db gain, it may not be enough, considering most phono stages only put out 0.5V).
Before I start work on a preamp (I'm thinking about a BoZ, or the Jfet variant), would there be any problems increasing the gain of the amp by fiddling with the resitistor ratios (R1 and R2) ?
I was also toying with building a non-feedback version of this amp, by using the the input described in the ZenV9 document (fig. 4). What would the gain be taking that path ?
Hey, if anyone has a spare set of boards from the group buy, I would certainly like to buy them from you.
I use a salad as for output lytics on my Zen's
10mf Elna + 6.8mf Chemicon+330uf Pana FC + 10uf film Wonder Cap + 0.47uf Wima on Zen V4.
For Zv9 I plan to use near the same maybe deliting the wima
😉
10mf Elna + 6.8mf Chemicon+330uf Pana FC + 10uf film Wonder Cap + 0.47uf Wima on Zen V4.
For Zv9 I plan to use near the same maybe deliting the wima
😉
Hey all.
I'm currectly collecting the bits and pieces to build this sucker, and am wondering what to get for the 220uF caps ?
I notice that PD actually used 100uF BG N's on one of his Zen boards. Would a smaller value cap have any impact ?
What other decent caps may be used for these (such as BG STD's, or Elna Silmics perhaps ...).
Appreciate any advice 🙂
I'm currectly collecting the bits and pieces to build this sucker, and am wondering what to get for the 220uF caps ?
I notice that PD actually used 100uF BG N's on one of his Zen boards. Would a smaller value cap have any impact ?
What other decent caps may be used for these (such as BG STD's, or Elna Silmics perhaps ...).
Appreciate any advice 🙂
Hi Lordavader,
IMHO you can use Elna 220µF/63v for C2 to C7. (low ESR)
They fit perfectly on F3 Peter's boards.
IMHO you can use Elna 220µF/63v for C2 to C7. (low ESR)
They fit perfectly on F3 Peter's boards.
F3 caps
Morning LV,
For C2,3,4 and 8 I would suggest either Blackgate N/NX or Elna ROA Cerafines with maybe a small propylene bipass (underneath) and for C5,6,7 the Nichicon Muze (KZ or FK) or Blackgate F series and again, maybe with a bipass to taste.
Also for C1, an excellent alternative is the Rifa (peh169/200) and will have to be mounted offboard - large size.
The C9 is a bit tricky- the sound is very dependent on this - I favour propylene here, rather than styrene or silver. All sorts of possibilities, including the "missing base" problem!
I would suggest the Panasonic FC rather than the Elna Silmic and the BG STD are always welcome.
A lot depends on the rest of your system, musical taste, room acoustics, etc
Morning LV,
For C2,3,4 and 8 I would suggest either Blackgate N/NX or Elna ROA Cerafines with maybe a small propylene bipass (underneath) and for C5,6,7 the Nichicon Muze (KZ or FK) or Blackgate F series and again, maybe with a bipass to taste.
Also for C1, an excellent alternative is the Rifa (peh169/200) and will have to be mounted offboard - large size.
The C9 is a bit tricky- the sound is very dependent on this - I favour propylene here, rather than styrene or silver. All sorts of possibilities, including the "missing base" problem!
I would suggest the Panasonic FC rather than the Elna Silmic and the BG STD are always welcome.
A lot depends on the rest of your system, musical taste, room acoustics, etc
Thanks for the options !!!
The only problem with BG N/NX caps, is that the 220uF value either comes in 16V or 160V (no 50V values unfortunately), hence my asking of 100uF would suffice for C2,3 and 4 (I won't be using any bypass caps for C1, as I've already got some Jensen 4 poles lying around 🙂 ).
The only problem with BG N/NX caps, is that the 220uF value either comes in 16V or 160V (no 50V values unfortunately), hence my asking of 100uF would suffice for C2,3 and 4 (I won't be using any bypass caps for C1, as I've already got some Jensen 4 poles lying around 🙂 ).
What is R1,R2 and C5 on the supply board?
And between the filter lyts there is a place for either 2 transistors or 2 3-leg regulator.
And between the filter lyts there is a place for either 2 transistors or 2 3-leg regulator.
Those are optional parts in case you use the board for other purpose than F3 PS.
The TO-220 devices are regulators and parts you mentioned are used with them: http://www.diyaudio.com/forums/showthread.php?postid=1237660#post1237660
The TO-220 devices are regulators and parts you mentioned are used with them: http://www.diyaudio.com/forums/showthread.php?postid=1237660#post1237660
- Status
- Not open for further replies.