Do you have any estimate for availability of the Rev 2 F5 boards? From the discussion so far, I assume they aren't ready quite yet. Just wondering when to plan for having the rest of the parts on hand.
Thanks,
John
Thanks,
John
Hi John,
Yes you're right. I need to order them first - then there is a 10-14 business days production time + shipping from China. But I expect to order during this coming week.
The layout is as good as ready - I usually go over it a few times before ordering, but this will not be a delaying factor.
Christian
Yes you're right. I need to order them first - then there is a 10-14 business days production time + shipping from China. But I expect to order during this coming week.
The layout is as good as ready - I usually go over it a few times before ordering, but this will not be a delaying factor.
Christian
Hello Cviller,
What's the size of the Rectifier Bridge PCBs ?
I just started with my F5 build:
Part1: getting everything in the case.
Regards,
Danny
What's the size of the Rectifier Bridge PCBs ?
I just started with my F5 build:
Part1: getting everything in the case.
Regards,
Danny
The board is 38x90 mm, you can read more about it here: http://www.diyaudio.com/forums/group-buys/142565-gb-rectifier-boards.html . The thread is not very active, so it can be hard to find. 😉
Part2 getting the case? That tends to be one of the biggest challenges, unless you have access to machining tools.
Part2 getting the case? That tends to be one of the biggest challenges, unless you have access to machining tools.
Thanks, I missed that thread.
I already have a case, it's one from Hi-Fi 2000 , the heatsinks are 16.5 x 40cm and the front panel is 1cm thick aluminum, I'm planning to put some thermal grease between the heatsinks and the front panel, so that the alu front also becomes part of the heatsinks.
It looks like a good case, only the bottom need some reinforcement, that 500VA is heavy.
I already have a case, it's one from Hi-Fi 2000 , the heatsinks are 16.5 x 40cm and the front panel is 1cm thick aluminum, I'm planning to put some thermal grease between the heatsinks and the front panel, so that the alu front also becomes part of the heatsinks.
It looks like a good case, only the bottom need some reinforcement, that 500VA is heavy.
Attachments
I know those boxes - great to work with and very good value for money! I wouldn't worry too much about conducting heat to the frontplate though.
What are the transformers for?
What are the transformers for?
Those two red ones at the right are 10mH chokes for the CLC PS.
The one in the left upper corner is for the soft start based on this circuit:
http://www.diyaudio.com/forums/pass...t-standby-functions-your-aleph-amplifier.html
The soft start is done with a CL60 that will be bypassed with a relays after 5secs.
The one in the left upper corner is for the soft start based on this circuit:
http://www.diyaudio.com/forums/pass...t-standby-functions-your-aleph-amplifier.html
The soft start is done with a CL60 that will be bypassed with a relays after 5secs.
Not sure if you already found out, but the size is 190x45 mm and the hole spacing between the fets are 40-80-40 mm
I repaired a few boards for folks who purchased the component parts -- men generally don't read directions -- (in fact, the manual for one of my Hewlett Packard spectrum analyzers made that point, that if were reading the manual for the first time, something might be wrong.) I would suggest 2 mounting arrangement for the current protection transistors so that there's no confusion.
Do you suggest I make two footprints? I thought about changing the footprint to be correct for ZTX, but as you say, people don't read too much so I was afraid of causing yet more confusing. The reading thing reminds me of the simpsons movie: "I was elected to lead, not to read" 😀
It's pretty compact so there's not a lot of room on the silk -- you could overlap two devices (probably violating design rules for your pcb program) -- or affix a label to the packaging advising the purchaser that different transistors have different pinouts.
I send the Zetex devices -- they are a bit pricier -- but haven't failed me yet. Which are the transistors contemplated on your board?
I send the Zetex devices -- they are a bit pricier -- but haven't failed me yet. Which are the transistors contemplated on your board?
I used BC550 and BC560. I don't like the shape of ztx, they are curved on the front side instead of the back side... but thats just me. 😉
However I could probably flip the footprints without causing an increase in confusion. I usually recommend people to get parts at your store, so it would make sense if the boards matched.
However I could probably flip the footprints without causing an increase in confusion. I usually recommend people to get parts at your store, so it would make sense if the boards matched.
The BC devices are the ones Per Anders uses in his super regs so I have them for my own use. Perhaps, instead of the outline of the device, just "C B E" and let the builder take a look at the datasheet!
I think Nelson would be shocked at how many of these amps have been built.
I think Nelson would be shocked at how many of these amps have been built.
I think the simple design is the reason people have built so many. He'll be even more surprised with the J2 if we're lucky enough to get the chance.
Sorry to interfere with the thread, but I cannot reach ma_coule...
ma_coule,
Haven't heard anything from you, in case you are still interested in the Fairchild-fets, please mail me with a proper email-adress. Thank you.
At the moment I still have a few pairs for the F5.
Have fun, Hannes
ma_coule,
Haven't heard anything from you, in case you are still interested in the Fairchild-fets, please mail me with a proper email-adress. Thank you.
At the moment I still have a few pairs for the F5.
Have fun, Hannes
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