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Old 13th March 2012, 03:12 PM   #1021
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Quote:
Originally Posted by AndrewT View Post
That seems like a reasonable table of values to minimise the resistance variation due to temperature induced effects when very high transient signals pass through.
A normal F5 runs on +-25Vdc supply rails so the table could be completed by adding in a 20Vpk output and using a 600mW resistor. We are back to the original now.
Andrew,
I wonder if you'd consider adding a couple of columns for me.
+- rail voltage and maximum output power.

I think alot of builders would find it very useful (I certainly would).

Regards
Andy
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Old 13th March 2012, 03:24 PM   #1022
AndrewT is offline AndrewT  Scotland
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There seems to be a fundamental disagreement on the voltage drop from the +-V supply rails to the maximum voltage peak delivered to a resistive test load.

A table of supply rail to max power cannot be done until that disagreement is removed.
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Old 13th March 2012, 03:29 PM   #1023
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Andrew,

Ok, no problem. I guess that can wait for the test builds.

Andy
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Old 13th March 2012, 06:32 PM   #1024
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The Panasonic ECG resistors can take a lot of punishment -- but they do like to be off the PCB a bit so air can circulate.
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Old 14th March 2012, 03:16 PM   #1025
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For best sonics, imo, oversize ALL resistors.

My rule of thumb is to run them at <50% rating.

_-_-bear
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Old 14th March 2012, 03:19 PM   #1026
a.wayne is offline a.wayne  United States
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Sounds reasonable bear ........
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Old 14th March 2012, 03:27 PM   #1027
AndrewT is offline AndrewT  Scotland
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Quote:
Originally Posted by bear View Post
For best sonics, imo, oversize ALL resistors.

My rule of thumb is to run them at <50% rating.

_-_-bear
and when in the feed back loop ~10%
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Old 14th March 2012, 03:48 PM   #1028
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me? reasonable?

Ha!

I also like fat traces and big pads... space on the board (if possible)...

_-_-bear
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Old 14th March 2012, 04:13 PM   #1029
labjr is offline labjr  United States
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I also like fat traces and big pads... space on the board (if possible)...

_-_-bear
Same here. It doesn't cost any more to leave more coopper on the board so why not? The extra space costs but I don't care.
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Old 14th March 2012, 05:04 PM   #1030
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me? reasonable?

Ha!

I also like fat traces and big pads... space on the board (if possible)...

_-_-bear
Duly noted
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