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Old 5th August 2007, 05:02 AM   #31
anatech is offline anatech  Canada
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Hi Bee C.,
You are talking to a guy that designs the circuit by hand, then designs and builds the PCB. Then it either works or it doesn't and once I have figured that out, I make a new PCB and rebuild it.

I really do have to figure out how to use these new fangled software packages. I did use Orcad a long time ago. It takes longer to design the circuit, but it becomes easier as you make revisions. I still wasn't that impressed.

For artwork, I used the rub down patterns on clear film. The clear film was laid on top of 10 div / inch graph paper. It was positive artwork and always worked very well for me. The design phase was pencil on the same 10 div / inch paper.

-Chris
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Old 5th August 2007, 05:33 AM   #32
Bee C. is offline Bee C.  Indonesia
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Default Cooll....

Hii Chriss...
I salute for You and every one whom make their own pcb by hand....a hand made.....

I remember my first pcb what I make when i'm on junior high school..( smp-here )...I mark the stripe lines whit a felt-tip marker....it's too "hard" for me ( I'm not good wit stright line drawer)...and I ettach whit a cloroferitch ?! ( I'm not sure to spelled)..... haa..ha...ha.... that was so great time....

I serching for software like psipce ?!
but i cant used,right know I have a "Eagle v.4.16" not familiar for me....hee..he...
the first software i used is Workbench.....I forgat the version.....
it's helfull to simulate the circuits.....(for me i think)...
but I lost the cd's.....(




Bee C.
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Old 5th August 2007, 08:05 AM   #33
Greg Erskine is offline Greg Erskine  Australia
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Hi Bee C.,

Have you been following the DX Amplifier thread, because the DX Amplifier is very close to your final circuit. The lessons learnt there may help you avoid some of the potential problems, i.e. I would suggest you change the biasing diodes to a Vbe multiplier mounted on the heatsink.

Eagle is certainly good enough for schematics and PCB design, but it doesn't have spice built in. You may want to have a look at the DX Amplifier PCB because it would take only a few modifications to fit your design. Doing a good layout is very time consuming, so if you have something to start with, your half way there.

R8, R9 and C4 form the "bootstrap". R6 is part of the feedback circuit anatech has been talking about.

regards
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Old 6th August 2007, 01:09 AM   #34
anatech is offline anatech  Canada
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Hi Greg,
Thanks for your input in the DX amplifier thread. I haven't read it yet.

Still, there is the problem that I and many other members face when a board needs to be made. How to get that lovely pattern out of the computer and formed in copper. Some of the laser to photo paper and iron on ideas sound attractive. Much better for people like me who no longer have a steady hand.

-Chris
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Old 11th August 2007, 03:26 AM   #35
Bee C. is offline Bee C.  Indonesia
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Quote:
Originally posted by Greg Erskine
Hi Bee C.,

Have you been following the DX Amplifier thread, because the DX Amplifier is very close to your final circuit. The lessons learnt there may help you avoid some of the potential problems, i.e. I would suggest you change the biasing diodes to a Vbe multiplier mounted on the heatsink.

Eagle is certainly good enough for schematics and PCB design, but it doesn't have spice built in. You may want to have a look at the DX Amplifier PCB because it would take only a few modifications to fit your design. Doing a good layout is very time consuming, so if you have something to start with, your half way there.

R8, R9 and C4 form the "bootstrap". R6 is part of the feedback circuit anatech has been talking about.

regards
Hiii Greg.....

Thanks for your post.....
I some agree whit u ,I try to learn at the DX amplifier thread......
that's nice amp..... but not cheep for me.....

so what software i cab use for analyze the circuit ?
could u send me the software ? to : be_cek@yahoo.com ?????


I'll greath tahnks for u greg.....

Best regards,
Bee C.
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Old 11th August 2007, 05:52 AM   #36
Greg Erskine is offline Greg Erskine  Australia
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Quote:
Originally posted by Bee C.
Thanks for your post.....
I some agree whit u ,I try to learn at the DX amplifier thread......
that's nice amp..... but not cheep for me.....

so what software i cab use for analyze the circuit ?
could u send me the software ? to : be_cek@yahoo.com ?????


I'll greath tahnks for u greg.....
Hi Bee C,

I am also looking for some circuit analysis software as well.

regards
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