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Joined 2002
Has any one got any boards for this amplifier, id like to buy a set to try this amp out, i think i have adequate heat-sinks too.
J'
J'
Member
Joined 2002
I'm really interested in a pair of boards to try this out now. Has any one got any boards? is any one going to get some created ? I would attempt this my self but i have no tools to do so 🙁
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Joined 2002
OK i have talked to a few members on the forum asking about boards also. is any one interested in a group BUy for these boards since there is more than 3 people asking i thought i would ask if there is any one else ?
Going to be Psu boards and F4 boards.
Jase
Going to be Psu boards and F4 boards.
Jase
Member
Joined 2002
You can use my design, if you like. Component numbers are the same as papas. It is single sided and the blue traces are gnd.
Oh, I forgot to say the dimension of this drawing is 294x100 mm.
Oh, I forgot to say the dimension of this drawing is 294x100 mm.
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Joined 2002
cviller said:
Great new's. Do you think you can email me and we can talk about this more ? email at jase @ jasesspace .com its better for me to respond on that email address instead of the other one we are talking on.
Jase
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Joined 2002
jleaman said:
Thought you Canadians used SI units... but you are right, 294mm is just under 12". 😉
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Joined 2002
cviller said:
My heat sinks are exactly 11-3/4" long and 10" high.. Wonder if this can be shrunk down a inch or 2 ?
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Joined 2002
Thanks for all the interest guys im working hard on this righ tnow to see what we can do about boards.
Questions tho..
Are people interested in psu boards too ? Im thinking i will continue to use Briangt's PSU boards.
Do we want one long board per channel 12" or smaller boards ?
I would love to hear some input.
Thanks guys.
Jase
Questions tho..
Are people interested in psu boards too ? Im thinking i will continue to use Briangt's PSU boards.
Do we want one long board per channel 12" or smaller boards ?
I would love to hear some input.
Thanks guys.
Jase
An externally hosted image should be here but it was not working when we last tested it.
You should probably just follow the psu design in the F4 service manual 🙂 I don't believe that you will need as much capacitance with the F4.
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Brian
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Brian
cviller said:
😀 12" ... I couldn't even print it since I don't have any legal paper (only letter 8.5x11)
This would be a good excuse to get those ebay heatsinks in 14" lengths though, or maybe a group buy for Conrad heatsinks maybe?
I have one of Brian's PSU boards, and in the F4 schematic, it uses 60mF per rail, so 22mF caps wouldn't be too bad here.
The only drawback I am running into with Brian's board (which can easily be overcome) is my 18+18V transformer puts out 26.5V after rectification (because I get 122V out of my outlets), so I need to use a 100ohm series resistor to bring it down to ~22V - which I can't do using the onboard rectifier diodes (so I etched my own PSU board)
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Joined 2002
twitchie said:
😀 12" ... I couldn't even print it since I don't have any legal paper (only letter 8.5x11)
This would be a good excuse to get those ebay heatsinks in 14" lengths though, or maybe a group buy for Conrad heatsinks maybe?
Stephen
I'm working to get them smaller, but perhaps this would be good to keep them this way. I am aiming for 9" tho.
I'm able to do a group buy for heat-sinks, i can email my contact for heat-sinks if possible. we can lave the current boards at size we just need to get longer heat sinks. I don't know if the ones i am looking at will work tho as the fins go lengthwise not up and down.
I printed it on two transparencies and taped them together. Guess you can't do that with toner transfer...
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Joined 2002
Ok guys looks like were going to do a psu board and one single board with a snap line into 2 boards they are going to be 9" long.
Jase
Jase
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