The Model E glows green!

The Model E amplifier is designed to provide you with classic rock tones that only a tube amplifier can bring.  This amplifier was carefully designed and redesigned to be not only great sounding but also highly versatile.

Let‘s face it, some of the most famous classic amplifiers out there are one trick ponies.  They sound great, but only for a very small range of tones.  On the other hand, many modern amplifiers boast 2, 3, even 4 or more channels, promising to give you the sound of many different amps, but at the cost of pure tone, simplicity and manufacturing cost.  After you spend hours tweaking the 20+ knobs to find your perfect tone, you realize you forgot you’re supposed to be practicing!  What I set out to do was provide an amplifier with the simplicity of the classics with the range of modern amplifiers, and I think you will agree that I have achieved that goal!

The Model E provides 18 watts of power in Pentode mode and 6 watts of power in Triode mode.  It can drive cabinets rated at 4, 8 and 16 ohms via a switch.  The optional High Gain configuration increases the gain to levels that can only be described as searing, while still retaining the ability to clean up.

The Model E in it's attractive wood case.

A view of the backside to show how it fits inside.

Detailed view of the dovetailed joints.

Product manuals for the current models are nearly complete!

Visit the link for a sneak preview!

User Manual for Model 6E-HG

That was a great show!  I talked to some really cool people.  Now it’s time to redesign my website and get some rest.

I am excited to announce that JDP Amplifiers will be among the vendors at the up coming…

19th Annual Vintage Guitar Expo

Sunday, Feb. 27th, 2011
At the Double Tree Hotel
5000 W. 127th St. Alsip, IL
I-294 N. or S. Cicero Ave. Exit

Dealers from all over the Midwest will be Buying, Selling and Trading: New and Used Guitars, Amplifiers, Parts/Accessories, Videos, Rock & Roll Memorabilia, and More!

Showtime
10am-4pm

Admission only $10

For more information, contact R & B Productions.
(847) 931-0707
bakesguitar@aol.com.

I just finished doing a Mark Moyer mod on a Fender Custom Vibrolux Reverb and the difference is astonishing.  The mod involves removing the reverb from the Normal channel, lowering the gain of the pre-amp, increasing the caps on the reverb to make it fuller, replacing the tone stack capacitors with higher quality caps, removing the protection diodes on the 6L6s, adding negative feedback, and changing the ground reference resistors on the heater lines.

The mods really open up the sound of the amp and give it much more clean headroom.  The distortion changes from a pre-amp based fuzz to a power amp crunch.  The reverb has a lot more depth and realism.  The mod also takes care of the constant hiss in the amp.

Anyone interested in doing this mod, contact myself or Degroovia Guitars in Dekalb, IL

Jason

P.S.  Some versions of the mod suggest swapping V3 (reverb driver) 12AT7 with V6 (Phase inverter) 12AX7 to improve the dwell of the reverb and decrease the gain of the phase inverter.  While some classic Fender designs did use a 12AT7 for the phase inverter, none used a 12AX7 for the reverb tube.  The 12AX7 is not suited to drive reverb.  It will not damage the amp or tube in any way, but the 12AX7 does not have the needed power to properly drive a reverb tank.  I found the tube swap made the reverb sound lifeless and it took away the sparkle of the overall tone.  Feel free to experiment.

Built in 2005

It uses 3 12AX7s and 4 EL34s.  All are Tung-Sol Reissues.

It uses a mixture of Carbon-Composition resistors for the vintage vibe and Metal-Film resistors for low noise.

It uses Sprague Orange Drop coupling capacitors and JJ Filter capacitors.

The Output transformer was made by now defunct Obsolete Electronics, known for making excellent Marshall transformers.

The box and covering were done myself.

The amp sounds, quite simply, amazing.  The only solid state in the amplifier is the rectifier diodes.  The layout is designed to minimize noise and hum.  The resulting noise is lower than what the guitar itself creates.

This amp is LOUD!!!  Two of the power tubes can be removed to cut the power down to 50w.  This makes the volume a bit more manageable.

The Front controls (from left to right): High gain input (top), Low gain input (bottom), Gain, Bass, Mid, Treble,Presence, Volume, Standby, Power.

On the back (left to right): Main fuse, HT Fuse, Line Out, 2 Paralleled Speaker Jacks, Impedance Switch (4-8-16 ohm)

The amp is for sale for $1100.00 at Degroovia Guitars

Welcome!

Currently JDP Amplifiers is under some construction, so please pardon our dust and we will have things back up to speed shortly.

-JDP