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Crate b80 xl amp cuts out bang on top ok until hit low note then hit top again it works again crazy

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Scott Macleod

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Cold solder on PC board. Take it to a certified tech at a music store or electronic repair shop. Quite common in older apps.

Posted on May 01, 2019

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fletch24990

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There is a short somewhere, check your wiring and solder points.

Posted on May 01, 2019

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Fred Yearian

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SOURCE: I have a Fender Telecaster guitar and a Crate amp that cuts out i

The next time it stops, unplug the cable from the guitar and touch the tip of the connector with your finger. If the amp hums, then the amp is still working and the problem is in the guitar. If there is no hum from doing this, then the amp has am intermittent.

Try this before it fails to see what to expect in the way of the hum from this test.

Common problems with the amp are OFTEN with a broken input connector or bad switch on the preamp output jack if it has one.

There are MANY other things and without troubleshooting it is hard to steer you to a fix.

Posted on Mar 27, 2010

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2 Answers

Crate gtx212 mute circuit (Q24 across IC4A pins 1 and 2) should go positive on the gate when a plug is inserted.


Looks like Q24 changes the gain at IC4-A from low with no input jack to normal gain with a jack inserted. Since this appears to be a guitar amp that expects a floating input plug any connection at the input to say, a mixer etc may cause a re-grounding via that equipment's circuits, thus negating the auto mute...... eggs & suck :-) If using a moving coil meter it could upset things.... an interesting fault! Sorry I can't be more help - Good luck!

Feb 11, 2017 | Crate Music

1 Answer

I have a crate vtx200s has very little volume everything else works whats the deal?


Hi, you hadnt mentioned how long you've had the amp, or how new it is, so I'm going to assume it's new to you. The Crate VTX200 has 3 channels, each with its own volume level. Let's check the simple things first:
1. Check to make sure you're adjusting the same volume knob volume knob to the same channel. The active channel will be lit with a green light.
2. Check the cables from the "Speaker Out" jacks on the amp (if you are using them). Are they plugged in all the way, or are they damaged?
3. Are you playing through a preset that you may have accidentally made "low", and may not be aware of or are stuck in it?
If none of these answers helps, there might be a problem with the input buffer in the circuit or possibly within the damping circuit of the speakers. I'd advise having the amp serviced to confirm an internal electrical problem also. If you don't have a manual for the amp, one can be found here:
http://www.manualguru.com/crate-amplifiers/vtx200/users-manual

Jan 22, 2016 | Crate Music

1 Answer

Effects don't work


On some amps there needs to be a footswitch inserted in the control jack to activate the effects circuit. Contact Crate to see if that's the case with your amp.
http://www.crateamps.com/support/index.php

Jan 28, 2014 | Crate CA30DG Taos Acoustic Guitar Amp, 30...

1 Answer

Rms b80 bass guitar amp has little volume in the low side jack , hi side jack is fine just not as much bass


The low in side jack has a lower vol. but should only be1/4 less than the high in jack on most amps, --try this,-- plug guitar in high in then take all the treble off and 1/2 mid. range bring up bass range and if you have equauzation bring down 26k 5k 10k about 2 notches or points. See if that give you better bass tone.

Oct 10, 2013 | Bass New Rms 40 Watt Bass Guitar Amplifier

1 Answer

I have a Fender Telecaster guitar and a Crate amp that cuts out i


The next time it stops, unplug the cable from the guitar and touch the tip of the connector with your finger. If the amp hums, then the amp is still working and the problem is in the guitar. If there is no hum from doing this, then the amp has am intermittent.

Try this before it fails to see what to expect in the way of the hum from this test.

Common problems with the amp are OFTEN with a broken input connector or bad switch on the preamp output jack if it has one.

There are MANY other things and without troubleshooting it is hard to steer you to a fix.

Mar 26, 2010 | Fender '72 Tele Deluxe Electric Guitar

1 Answer

Crate Flexwave 120h (Half Stack) volume issues


Perhaps you have a bad capacitor on your volume control?

You can get an ESR meter and test your exposed isolation caps for leakage? The have to be removed so unplug the unit if you are gonna do any work inside the cabinet.

Also, try a shorter or higher quality guitar cable. This will cut impedance between the pickups and the amp.

Good luck and be careful!

Mar 08, 2010 | Crate FlexWave FW15 Guitar Amp Combo, 15...

1 Answer

It will not work what colud be wrong


its a crate. 60% of all crate amplifiers go back on defects. take the top screws out and slide out the chasis, look at the fuse and determine if its toast. if the fuse is good, get a new amp. if the fuse is bad replace it and you should be good. the circuit board will have the correct fuse to be used printed on the board.
yostamplifier.com

Dec 30, 2009 | Crate FlexWave FW15 Guitar Amp Combo, 15...

1 Answer

Crate 100 head. Reverb doesn't work.


Check the input RCA plug going into the reverb tank (silver box with two wires connected to it). Make sure the amp is off when you do this. Sounds like the output is working fine if hitting the amp does it.

Jun 19, 2009 | Crate Music

2 Answers

Crate flexwave 120 head sound cuts out


You have a broken solder joint. You'll have to disassemble the amp enough to get at the soldered side of the circuit board that the controls are mounted to and touch up any suspect solder joints. Just be sure to resolder only the joints that were originally soldered or need to be soldered. Hope this helps.

Jun 07, 2009 | Crate FlexWave FW15 Guitar Amp Combo, 15...

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