Volume drop in Audio loops 1-4 only

B

bigrigg

Member
Hello,

I have a large volume drop in Audio loops 1-4 only. I have tested all of the following and they are 100% functional:
any pedal I try
the cables
the power supply

I have moved the same pedal and cables to other loops and they work fine. I have removed all the pedals but one, still happens. I've tried all loops 1-4 still happens. When bypassed the clean signal is fine. I've tried with and without buffer, no difference. I have output 4 to input 5. I've changed that cable too.

I have changed and tested every component but the internal RG. It seems as though when any loop is activated (audio 1-4) with a pedal it kills the volume. Just one or any combination of audio loops 1-4 kills volume. I can still hear the signal (wet) with effect but very low. It seems as the signal is going through with the loop activated, but there is an internal resistance (?) that kills the volume.

Please advise asap.
Thank you very much.
 
Okay, please check the following:

- What happens if you go straight from the output of loop 4 to your amp (bypassing loops 5-8)?
- What happens if you activate one of loops 1 though 4 , and there is nothing plugged into the loop?
- What happens if you activate one of loops 1 through 4, and you have a cable plugged from the loop's send to return.

Please let me know what you find...
 
Hello,

-nothing plugged into the loop, when activated it is good
-just a cable plugged into the loop, when activated it is good
-going directly from out of audio loop 4, the pedal WORKS! yaaa
loops 1-4 work when going direct out of 4

now you have me on the edge of my seat??
Please advise. Thanks very much for your help.
 
Okay, next step: try going out of output 5-8. Any better or worse? Then, go out of the CS Out jack. Better or worse?

Also, when you tested your cables, did you measure between ground and tip? And, if you have an ohmmeter with a range switch, did you try measuring it with on a high range (like 100k)? Partial shorts of 10k or 20k can cause the volume drop like you describe. See my post on cables near the top of this forum.

One more thing: which pedal or pedals are you using to test for this problem?
 
Thank you very much Ron. I have approx. 16 effects plus channels I'm switching with the RG and "another" switcher. That being said, you can imagine I have a large number of cables. Approx. 40 plus.

My testing of cables did not consist of checking all of them with an ohm meter for infinite resistance between tip and ring or zero resistance between end to end etc.

In those 40 or so cables I found a few little "buggers" that had some shorts of a few thousand k ohm and once I replaced (built) my new Mogami/Neutrik replacements, everything worked perfectly fine.

This message is for everyone enjoying this forum. Please, check your cables (every last one) with an ohm meter for testing. Plugging into a tuner or amp and getting a signal is not enough.

Thank you again Ron. You are a genius and a gentleman.
I greatly appreciate your efforts and help and will spread the good RJM word on the forums. :D
 
Great! I'm glad to hear that the problem is solved. It's a very common problem - someone contacts me with this problem once a week on average. That last tip-to-ground test is crucial when you're building cables!
 
Hey Ron,

I am testing all of my cables with a Cable tester. This would also do the job, or is there really a need for an ohm meter? Since I've got my cable tester I never got any problems with bad cables.
 
It depends on what you're cable tester is testing. If it can detect a partial short from tip to ground (in addition to the more usual tests), then that's all you need.
 
You must log in or register to reply here.
Back
Top