universal chip pre-amp project - Page 4

peranders · 25th June 2009, 08:36 AM

You have not 20 mils on the first design. I think you have 10-12 mils tops. You route a trace between the SO08 footprint. Check the connections to the buffer.

digi01 · 25th June 2009, 08:53 AM

Quote:

Originally posted by peranders
You have not 20 mils on the first design. I think you have 10-12 mils tops. You route a trace between the SO08 footprint. Check the connections to the buffer.

yes,you are riight.there are thin routes

is this ok?

digi01 · 25th June 2009, 08:57 AM

the trace between the SO08 footprint is signal level,so i use thin route to keep the trace clear.

any ideas?

digi01 · 25th June 2009, 09:46 AM

Quote:

Originally posted by peranders

The hot relief pads for the connectors have very thing traces.

the pads for the connectors is not for hot relief.the reason i use bigger pads is for physical strong.cause it is industrial screw connectors.
i add teardrops around the pads,this is my first time use teardrops function.
i have setup grounding relief via pads near the signal input and output for better top layer grounding.

the attached is modified ucp_v0.1 smt.

will_raymo2000 · 25th June 2009, 11:05 PM

Let me know when you have some prototypes and I will be more than happy to demo one of them for you!

Will keep an eye on this thread, looks like it could be very useful!

digi01 · 29th June 2009, 03:29 AM

I do a overall test last weekend.there are three module.

1,PDIP LM4562
2,SMT LM4562
3,NE5534 with LME49600

the test result is so good so fun.cause there are only few resistors and opamps in the signal route

Zang

digi01 · 29th June 2009, 03:33 AM

module details

tent · 29th June 2009, 08:43 AM

Wow.. great!
Well I just have a couple of spare PDIP LM4562 left over around home..

And your listening impressions??

tent:wq

digi01 · 29th June 2009, 10:07 AM

its sound detail,nature and graceful.
fyi,my gear list below:
1,pc audio--->lm4562 ucp_v0.1--->hd580 headphone
2,cd player--->ne5534 with lme49600 ucp_v0.2--->hd580 headphone
3,pc audio--->lm4562 ucp_v0.1--->lm3886 inverted poweramp--->kef coda7se loudspeaker

zang

tent · 29th June 2009, 10:57 AM

great.. I'd test it with a setup similar to number 3..
how could we agree for a demo shipmentz?

tent:wq

25th June 2009, 08:36 AM	#31
peranders Electrons are yellow and more is better! diyAudio Member Join Date: Apr 2002 Location: Göteborg, Sweden Blog Entries: 4	You have not 20 mils on the first design. I think you have 10-12 mils tops. You route a trace between the SO08 footprint. Check the connections to the buffer. __________________ /Per-Anders (my first name) or P-A as my friends call me

25th June 2009, 08:57 AM	#33
digi01 diyAudio Member Join Date: Mar 2003 Location: BEIJING	the trace between the SO08 footprint is signal level,so i use thin route to keep the trace clear. any ideas? __________________ 2010 DIY ALBUM UPDATED UCPv1(preamp) & DUAL(power supply)

29th June 2009, 10:07 AM	#39
digi01 diyAudio Member Join Date: Mar 2003 Location: BEIJING	its sound detail,nature and graceful. fyi,my gear list below: 1,pc audio--->lm4562 ucp_v0.1--->hd580 headphone 2,cd player--->ne5534 with lme49600 ucp_v0.2--->hd580 headphone 3,pc audio--->lm4562 ucp_v0.1--->lm3886 inverted poweramp--->kef coda7se loudspeaker zang __________________ 2010 DIY ALBUM UPDATED UCPv1(preamp) & DUAL(power supply)

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25th June 2009, 11:05 PM	#35
will_raymo2000 diyAudio Member Join Date: May 2009	Let me know when you have some prototypes and I will be more than happy to demo one of them for you! Will keep an eye on this thread, looks like it could be very useful!

29th June 2009, 08:43 AM	#38
tent diyAudio Member Join Date: May 2009	Wow.. great! Well I just have a couple of spare PDIP LM4562 left over around home.. And your listening impressions?? tent:wq

29th June 2009, 10:57 AM	#40
tent diyAudio Member Join Date: May 2009	great.. I'd test it with a setup similar to number 3.. how could we agree for a demo shipmentz? tent:wq

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