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Re: 56k from cw to ground helps some


 :
9/6/2003 5:23 AM
Jack Koochin Re: 56k from cw to ground helps some
Hi Rick, guys,  
What am I missing here.....? Adding the 56K won't allow the signal to be pulled all the way to ground, and thus wouldn't give as deep a "trough".  
If for example you took it to the extreme and stuck a 1M resistor in there instead of a 56K, there wouldn't be any modulation......right?  
 
Or have I got this backwards?  
 
Jack
 
9/6/2003 9:04 PM
Rick Erickson

quote:
"What am I missing here.....? Adding the 56K won't allow the signal to be pulled all the way to ground, and thus wouldn't give as deep a "trough"."
 
 
You really need to look at the schematic with this one. The pot shunts the LDR. When the pot wiper is grounded the LDR is effectively grounded on both sides. Opening the pot all the way connects the LDR to to the junction of the .1uF cap and 220K resistor, but it is still sees the 50KRA pot in parallel. Adding a 47K resistor between the pot and ground will raise the signal level because of the reduced load on the previous stage and effectively increase trem. depth since there is a larger signal being pulled to ground by the LDR, but now you can't turn the pot to ground so you have lost some adjustment range. This will also increase bass response somewhat which may or may not be desirable. HTH  
 
RE
 
10/13/2003 8:17 AM
Dominik
Fixed the weak Tremolo!
Hi guys,  
 
I fixed the weak Tremolo. I installed a new Tremolo "cockroach" and now the Tremolo works like a charm.  
 
Greetings,  
 
Dominik
 
9/2/2003 10:10 AM
neatpete
Re: More intensity for Tremolo
try searching for the optocouper instead :)  
 
peter
 

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