I currently use 317/337 regs with my Pedja buffer but Pedja specifically used the 7815/7915 to keep the regs as close as possible to the buffer circuit.
If you want to go for broke later on you could always replace the 7815/7915 with some Paul Hynes 'specials' (or similar). 😉
If you want to go for broke later on you could always replace the 7815/7915 with some Paul Hynes 'specials' (or similar). 😉
Nuuk said:
I have the parts gathered for a discrete regulator to bring the voltage down in two stages. I aim to get rid of ripple at this stage. From what I have read on Pedjas site the buffer does benefit from good steady lines.
In the final destination I will have two transformers for the audio signal, 1 SMPS for the 5 stereo tri-path amps and one torroid for the active crossover and buffer stages. I was going to begin with 1 high quality discrete regulator feeding the whole signal stage, with secondry regulation for the individual sections.
justblair. Are the boards you are making likely to be available to forum members or are they just for your own personal use ?
Puffin said:
On a very limited basis, I have permission for a short run which I will be sending for print this week. I wont be doing group buys or anything like that.
I also have a surplus of parts for the buffer, so I will talk with you privately if you need anything like this..
This I hope is the final layout...
I have sized the in and out connections to take Molex KK headers, either in vertical or Right angled form. The right angled form is supposed to mount on a board edge, but I have mounted them further in before in other projects and not had any difficulty.
I had to resize a few holes to match the drill sizes of the manufacturer.
I will do some last minute paranoia checks before converting to Gerber files and then it is off to be made.
There are a small number of us going in together on the manufacture side, which brings the cost down to reasonable for the PCB... Thanks to those that are.
If you have contacted me to ask for boards, just check your inbox for a spreadsheet version of the BOM. Any other parts you want, you can fill in and I will order on mass. This gets round the minimum orders for components.
Thanks all for your help so far.
Again, if there are some glaring errors, please point them out.
I have sized the in and out connections to take Molex KK headers, either in vertical or Right angled form. The right angled form is supposed to mount on a board edge, but I have mounted them further in before in other projects and not had any difficulty.
I had to resize a few holes to match the drill sizes of the manufacturer.
I will do some last minute paranoia checks before converting to Gerber files and then it is off to be made.
There are a small number of us going in together on the manufacture side, which brings the cost down to reasonable for the PCB... Thanks to those that are.
If you have contacted me to ask for boards, just check your inbox for a spreadsheet version of the BOM. Any other parts you want, you can fill in and I will order on mass. This gets round the minimum orders for components.
Thanks all for your help so far.
Again, if there are some glaring errors, please point them out.
Mike. can you get in touch by e-mail, I tried to reply to your mail, but the messages get bounced
Hi,
i've been looking for the components for 2 weeks, they're not availble here.
Need some advise for substitutions..
I already got: irf530 i/o 510, bs170 i/o 2sk170 and j537 i/o j130.. R they ok?
This buffer will match with all amp right?
i've been looking for the components for 2 weeks, they're not availble here.
Need some advise for substitutions..
I already got: irf530 i/o 510, bs170 i/o 2sk170 and j537 i/o j130.. R they ok?
This buffer will match with all amp right?
Hi,
i've been looking for the components for 2 weeks, they're not availble here.
Need some advise for substitutions..
I already got: irf530 i/o 510, bs170 i/o 2sk170 and j537 i/o j130.. R they ok?
This buffer will match with all amp right?
i've been looking for the components for 2 weeks, they're not availble here.
Need some advise for substitutions..
I already got: irf530 i/o 510, bs170 i/o 2sk170 and j537 i/o j130.. R they ok?
This buffer will match with all amp right?
justblair said:
Sorry your having trouble.
I don't know why but for some reason some folks have trouble replying to mey e-mails. Try typing it it yourself instead of just replying. It's metzlerm1@comcast.net make sure you put .net and not .com. If that doesn't work try elainenannygoat@yahoo.com
Thx
http://www.pedjarogic.com/gc/index.html
See this page for help building the buffer useing the parts you allready have...
See this page for help building the buffer useing the parts you allready have...
Thks nordic,
i runs the buffer with the substitution, they're runs well, i got a nice staging and separation, just a matter of taste, i don't like the sharpness of human voice.
I got my irf heating and other warming, is that normal?
Hows to get a flat and warmer human voices? Skip the 47nF?
i runs the buffer with the substitution, they're runs well, i got a nice staging and separation, just a matter of taste, i don't like the sharpness of human voice.
I got my irf heating and other warming, is that normal?
Hows to get a flat and warmer human voices? Skip the 47nF?
Thks nordic,
i runs the buffer with the substitution, they're runs well, i got a nice staging and separation, just a matter of taste, i don't like the sharpness of human voice.
I got my irf heating and other warming, is that normal?
Hows to get a flat and warmer human voices? Skip the 47nF?
i runs the buffer with the substitution, they're runs well, i got a nice staging and separation, just a matter of taste, i don't like the sharpness of human voice.
I got my irf heating and other warming, is that normal?
Hows to get a flat and warmer human voices? Skip the 47nF?
Boards arrived from fab today...
I'm still waiting for some other items to complete... Rapidonline just lost a repeat customer. Not only is their site having some technical issues, particularly with changing delivery address, but their customer service would appear to be lacking. I realise they are cheap on components, but I can get cheaper with better customer service elsewere.
Moan over...
Futurlec on the otherhand took slightly longer on the PCB's, but I am happy with their communication, and very happy with the job they did on the boards. Some piccies
I had enough parts to build one buffer. Albeit minus the regulators bypass caps.
and finally today managed to lash up a +/-20v power supply using lm317T's and some other bits and bobs in my magic parts box.
With a Frankenstein-esque fervour and the obligatory "It's Alive" I adjusted the trim pot to permit 6ma of current (about 480R). After checking to make sure that the magic smoke was still contained.
A multi-meter measured 4v DC at the output which is what I expected.
My oscilloscope gave me this sine wave...
All in all, its looking good. I have not yet listened to the buffer, that's going to have to wait for a few days till I get back from a few days away. But as far as I can tell the PCB is working fine.
Thanks to all the suggestions and help so far. This is my first circuit I have had fabbed for me. I have to say, that I am converted. No bad smells, no yellow stains from the chemicals, and the solder mask makes putting the thing together an absolute breeze.
Some more pics
I'm still waiting for some other items to complete... Rapidonline just lost a repeat customer. Not only is their site having some technical issues, particularly with changing delivery address, but their customer service would appear to be lacking. I realise they are cheap on components, but I can get cheaper with better customer service elsewere.
Moan over...
Futurlec on the otherhand took slightly longer on the PCB's, but I am happy with their communication, and very happy with the job they did on the boards. Some piccies
I had enough parts to build one buffer. Albeit minus the regulators bypass caps.
and finally today managed to lash up a +/-20v power supply using lm317T's and some other bits and bobs in my magic parts box.
With a Frankenstein-esque fervour and the obligatory "It's Alive" I adjusted the trim pot to permit 6ma of current (about 480R). After checking to make sure that the magic smoke was still contained.
A multi-meter measured 4v DC at the output which is what I expected.
My oscilloscope gave me this sine wave...
All in all, its looking good. I have not yet listened to the buffer, that's going to have to wait for a few days till I get back from a few days away. But as far as I can tell the PCB is working fine.
Thanks to all the suggestions and help so far. This is my first circuit I have had fabbed for me. I have to say, that I am converted. No bad smells, no yellow stains from the chemicals, and the solder mask makes putting the thing together an absolute breeze.
Some more pics
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