Well you want the highest resistance possible without ringing. So 900, 910 or 920 would be best for that coil. Lower values will overdamp and you will not see small targets.
Small gold decays very fast and you don't want to miss it!
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Surf Pi Pro Build
How important is setting the dampening resistor? With the 390r that comes with the kit I think I have a 15 uSec delay. I used a pot as recommended, I only noticed a 1 usec difference. Not sure where to actually set it. at 950 ohms I get the ringing, at 920 it is gone. If I adjust until there is no improvement in delay I am at 490 ohms. Which value should I use? This is what it looks like with the 390 ohm R6 installed. I thought I grabbed a screenshot of the other values...
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