HELP !!!!!! No harmonics

Joe E · Post by **Joe E** » 9 Mar 2000 12:21 pm

Can't say for sure, but if the stereo had anything to do with it would not throw them in the trash. Posible that the two speakers freq's are cancelling out the harmonics. It has to do phase and such. Try turning down one side of the rig and see if the harmonics are prevelant. They should go through the rig ok. But if the freq's overlap from the speaker sound wave, it could do phase cancelation. ALso try pointing the speaker away from each other as apossed to pointing toward each other. Remember the trapaziod configuration when using two speakers side by side.

c c johnson · Post by **c c johnson** » 9 Mar 2000 12:29 pm

man,and all this time I thought it was due to my right hand touching the strings 11 fretsabove the bar. I corrected that tp 13 frets above and it still didn't work.

Ricky Davis · Post by **Ricky Davis** » 9 Mar 2000 1:24 pm

Good one c.c.

John Boy>
Actually; you are altering the actual signal from your guitar to the amplification with all that stuff. Just plug your guitar in a volume pedal and out of the volume pedal into a amp or two; and really find out just what the hands are capable of doing.
Ricky

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Ricky Davis
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joeguitar · Post by **joeguitar** » 9 Mar 2000 2:26 pm

What kind of guitar are you using? I know that on some tele's neck p/u you can't get some harmonics on some fret postitions. The problem is that the pickup is in the "wrong" position in the scale length and it cancels some harmonics. Or, never let's them develop.

CU, joe

Jack Stoner · Post by **Jack Stoner** » 9 Mar 2000 2:29 pm

The EQ in the Profex II could be set where it's attenuating anything above a certain freq. Since he is not having problems with harmonics on the Session 400, it would appear to be something in the rack system. Have you tried different programs in the Profex II, just to make sure it's not one particular program.

You didn't say whether you are running both channels of the Profex II into the DPC750 and both channels of the DPC750 to two separate speakers. If you are only running one channel (mono), make sure you connect the left/mono output of the Profex II to the DPC750.

Jack Stoner · Post by **Jack Stoner** » 10 Mar 2000 3:24 am

????? That's strange. These ideas are far out, but the only thing left I can think of. Replace the guitar cord that connects between the Profex II and the Power amp and see what happens. Also try the other channel (right) out of the Profex II. Finally what kind of BW speaker are you using? If it's one designed for Bass it could be attenuating the highs.

Bobby Lee · Post by **Bobby Lee** » 10 Mar 2000 3:29 pm

Grasping at straws ... is there a crossover circuit in the speaker cabinet, or maybe even a bi-amp switch on the power amp that acts like a crossover?

Jack Stoner · Post by **Jack Stoner** » 11 Mar 2000 3:54 am

Jon, The DPC750 IS a Transistor Amp.

Ricky Davis · Post by **Ricky Davis** » 11 Mar 2000 4:25 pm

Well you didn't try my suggestion yet pal.
Ricky

Ricky Davis · Post by **Ricky Davis** » 12 Mar 2000 4:03 pm

That's cool John Boy; I respect that pal. Let us know what you come up with and how it works out for ya. Good Luck.
Ricky

Ernie Renn · Post by **Ernie Renn** » 13 Mar 2000 4:38 am

Contact Mike Brown at Peavey. He may have some suggestions for you.
Mail him at: mikebrown@peavey.com

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My best,
Ernie

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www.buddyemmons.com

John Lockney · Post by **John Lockney** » 3 Jan 2005 2:01 pm

I can't find the link at the moment but, I recently saw this issue addressed in a "Question and Answer" forum, I’m pretty sure it was one of the Carter setup pages.

They suggested that if the pickups were too close to the strings the magnetic pull would reduce string vibration, sustain, and specifically harmonics.
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Edited 1/12/05 to add link
http://www.steelguitar.com/askbud/askbud21.htm

and a post-emptive reqeust not to string me up for replying to a long dead topic...

[This message was edited by John Lockney on 12 January 2005 at 08:29 PM.]

Paul Osbty · Post by **Paul Osbty** » 3 Jan 2005 2:49 pm

Check for any compression settings in the Profex.

Compressors can squash harmonics since they don't always have the same amplitude as a plucked string.

I would set the Profex to a bypass or a "no effects" type preset as a check. Sometimes, compression is just part of an effect and not an alterable parameter.

I have no experience with a single 15" speaker, though. Is this a good speaker to expect much in the way of harmonics?

James Quackenbush · Post by **James Quackenbush** » 4 Jan 2005 12:57 pm

Two things come to mind when I am playing various pedal steels and amp combinations.....

I get more harmonics from ...

1) Tube amps and / or preamps

2) Single coil pickups

3) All of the above

Larry Bell · Post by **Larry Bell** » 4 Jan 2005 1:42 pm

Any chance the two 15 cabinets are out of phase with each other? I had that happen to me at a session. The engineer summed two stereo tracks and a lot of the track disappeared. We switched the leads on one of the speakers and it was fine. Just a long shot.

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Larry Bell - email: larry@larrybell.org - gigs - Home Page
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T. C. Furlong · Post by **T. C. Furlong** » 5 Jan 2005 7:24 am

Sounds to me like this is a situation that would call for "identifying the variables" I would suggest setting up the two rigs next to each other. Plug the same cable from the output of the guitar into one and then the other the other. Remember to match the output levels of the two rigs first, If the problem is there, take the output of the processor and plug it into the Session 400 to identify if the known "good harmonics" amp still is good. This will tell you that the processor is not the culprit. Keep switching and eliminating components until you you identify the "harmonics killer"

I love troubleshooting! If you are able to try this, and you find out anything, let us know.

I would also suggest that you think about the room that each rig was set up in when you experienced the problem(imagine trying to get harmonics to ring with your cabinets in a heavily absorbtive room) Room acoustics can be very tricky stuff.

Also, are the speaker cabinet designs different? Closed back? Different speaker?

Scott Appleton · Post by **Scott Appleton** » 5 Jan 2005 9:36 am

Sounds like the efx are set wrong or maybe the unit is failing. The power amp should not have a thing to do with it. The post about a/b ing it all sounds like the way to go. Also try a pre amp output from the
400 to the power amp and then to the 15",

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Don Walters · Post by **Don Walters** » 5 Jan 2005 3:11 pm

Finally figured out how "John Boy" could post as an unregistered member ... this thread is almost 5 years old.

Lee Baucum · Post by **Lee Baucum** » 5 Jan 2005 3:19 pm

Don, I was wondering the same thing! This is John Lockney's fault. Anybody live close enough to string him up?? We just can't let new members get away with this type of behavior.

Lee, from South Texas

Bob Kagy · Post by **Bob Kagy** » 5 Jan 2005 3:20 pm

Good eye Don. I wonder if John Boy solved his problem in the meantime.

John Bechtel · Post by **John Bechtel** » 5 Jan 2005 11:21 pm

I have always had a problem with harmonics, reguardless of the instrument or the amp. for 55-yrs.! However, and not tryin to be a smarty-pants; if you are trying to get a harmonic 13-frets above the tone-bar, you should reduce that to 12-frets or 7-frets or 5-frets, to name just a few correct positions. 13-frets is just, 'next to impossible'!

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“Big John” Bechtel
’49/’50 Fender T–8 Custom
’65 Re-issue Fender Twin-Reverb Custom™ 15”
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