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Author Topic: Ceriatone Overtone Special  (Read 12783 times)
Irelandy
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« on: August 16, 2008, 02:45:22 PM »
I've just bought an Overtone Special, and would like to know what everything does...Is there a manual??
Thanks, Andy
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guvmuleman
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« Reply #1 on: September 05, 2008, 06:07:53 AM »
sounds great. enjoy
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Rock-On!!
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« Reply #2 on: September 16, 2008, 10:15:29 PM »
Quote from: Irelandy on August 16, 2008, 02:45:22 PM
I've just bought an Overtone Special, and would like to know what everything does...Is there a manual??
Thanks, Andy
Me Too. Huh?



Quote from: guvmuleman on September 05, 2008, 06:07:53 AM
sounds great. enjoy
It does!! Wink Grin Grin
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M Fowler
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« Reply #3 on: September 18, 2008, 02:48:30 AM »
Do you guys have other amps to compare your new overtone with?  Lets me know how you like the amp because I am building up a collection and also planning to build a few others but the overtone is a lot more complicated to build.

I have got to take some pictures and you guys too.

Mark
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Darin_G
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« Reply #4 on: September 18, 2008, 07:18:36 PM »
OK this info comes from the ampgarage.com forum -

   Quick user's Guide to the Overdrive Special.

***********Front Panel:****************
FET: This input is for an acoustic guitar pickup.
NOR: This input is for an electric guitar

Volume: Sets the amount of gain for the preamp section. Use the "Master" to set overall amp volume. Higher levels of the Volume will distort the 'Overdrive' channel more.

Bright Switch: Adds a treble boost to both channels Mid Boost: (similar to the bright switch) Functions in both channels; adds some extra kick, especially in the overdrive channel.

Jazz/Rock: The Jazz setting is a quieter, lower gain setting.

Treble/Mid/Bass: These self-explanitory controls function in both channels. They are bypassed with the "PAB" (preamp-boost)

Drive/Ratio: These function only in the "overdrive" channel. The Drive, works in conjuction wth the "Volume" to control the overall gain or distortion. The Ratio is a seperate master volume. To set the Ratio control, go to the clean channel and set the overal clean loudness of the amp with the Master control. Then engage the "overdrive" channel and adjust the Ratio control to get an appropriate loudness of the overdrive channel.

Master: sets the overall loudness of the amp. Raises and lowers the loudness of both channels together.

Presence: Controls the amount of negative feedback. Higher settings reduce negative feedback and give more distortion. Lower settings increase the negative feedback on the power supply and reduce distortion.

********Back Panel ************

Ground Switch: Places a capacitor between one of leads from the mains to the ground. May eliminate hum in certain situations.

ON/OFF; Controls power to the amplifier. Make sure the standby is "off" before switching on. If the tubes get fed full plate voltage (about 450v) without being warmed up first, there can be damage to the cathode of the tubes.

Standby: controls the high voltage power to the tubes. Has the effect of silencing the amp. Let the tubes heat up a few moments before disengaging the standby when first powering up.

Fuse: Should be a slow blow 3A. Used to protect the circuitry from shorts.

Effects sent and return: This is a passive effects loop, There may be gain mismatch between the input of this jack and that of an effects pedal. Try it and see how it works. If you are serious about having an active loop, you can buy or build a Dumbelator which will plug in here and will have its own input/output into which the effects will plug.

There is a filter incorporated into the send/return jacks that is activated when a cord is plugged in. One can produce an overdrive smoothing effect by placing a patch cord in the send/return jacks.

PAB and OVERDRIVE switches on back panel: With the foot pedal unplugged, these switches control the preamp boost (which disengages the tone controls for some extra gain) and the Overdrive channel (which adds gain and distortion to the clean channel). So, they would be "ON" when set to "Manual". When the foot pedal switch is plugged in, keep these switches on "Pedal" for correct function with the foot pedal.

**********Inner Potentiometers (trimmers)***************

FET INPUT TRIMMER: located on the board near the FET input. Adjust this to change the gain of your acoustic guitar plugged into the FET input.

OD TRimmer: Located closest to the guitar inputs on the rectangular board. Adjust for the lowest setting that will produce a good overdrive tone.

Phase input trimmer. Located closest to the power tubes. Used to balance the two sides of the phase inverter tube.


It is a lot to take in, but I hope that it works.

Best Regards
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Animatic
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« Reply #5 on: July 19, 2009, 06:43:51 AM »
You can get a decent crunch over you clean  in the 'clean channel' with a high output guitar,
I like to stay 70% and it stays pretty clean and crunches out at 100%.
But that level can go into too high compression of the Overdrive channel.

I find this can be good if not to hard pushed,
but I prefer to set this for 'touch' level al al blues style,
when I have the guitar up 70%
and I can get clean and slight compression of overdrive with just pick control.
Then I can go 100% guitar and get a smooth overdrive, but not too much compression.

You can dial in a spot on Santana Abraxis sound if you like.

I have set this for a Marshal like flat out metal sound with the bass rolled off it does get there.
Somewhat similar to jumpering inputs on an an F56a and rolling most all bass off.

Good more midrange and Stevie Ray V. shows up with it cranked.

And clean but a touch of grit and less mids gets Duke Robilard.

One comment was it could be brighter. 
But that player plays screachingly bright in general.

I brought this amp to a Blues Festival and 70% of the lead players picked
this amp with a Tone ring 12" cab over the other 6 stage amps available.
Some also played my 5F6a with 4-10 Webers.

I also played pedal steel though it on a very large stage doing
Skynerd's The Breeze and it sounded hot cranked on OD.
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mcinku
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« Reply #6 on: August 08, 2009, 11:22:10 AM »
Sometimes search actually works...  Wink

http://ceriatoneforum.com/index.php?topic=267.msg2369#msg2369
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