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Messages - Jenzz

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The Fender Rhodes Electric Piano / Re: Rhodes issue (with sound clip)
« on: June 28, 2019, 06:35:35 AM »
Hi .-)

This the typical sound of hardened grommets + and a slightly off-set striking line or too hard hammertip. Move the harp back and forth, there will be a point were the 'zing' will reduce to an acceptable level...


Hi .-)

Sounds to me that this note / tine is missing its tuning spring...?


Gresco GuitarWorks Rhodie Preamp


Hi .-)

The above mentioned schematic was done by me many years ago. It was taken from what i found in an original PianoBass.

Keep in mind, that in addition to the high frequency roll-off, the caps form a resonant circuit together with the pickups inductance, because if you dial the tone pot, the caps get more or less parallel to the pickups.

The fix 100nF cap together with the pickups (2,24H) forms a somewhat flat curved resonant circuit at roundabout 330Hz,.


The Wurlitzer Electric Piano / Re: Wurlitzer leg paint color
« on: July 05, 2018, 06:21:15 AM »
Hi .-)

Maybe you can restore the legs using the Cola / Alu-foil method (it really works!)


Hi :-)

I just wanted to mention that there is a 3rd version of how the PCB and rocker switches are mounted.... On this Version, the PCB and switches are mounted on a metal bracket that is screwed into the metal harp:


The Wurlitzer Electric Piano / Re: Repairs on a Wurlitzer 300
« on: May 05, 2018, 02:40:34 PM »
Hi all :-)

Since i have a 201 in for service (the 300 uses the same PCB), i will take some pics of the PCB tomorrow...

....stay tuned ...


Hi .-)

This is from '83, but you can see a typical Reggae keyboard setup from the past here:

Rhodes + Organ

Cp-70 + Clavinet + Prophet on top

Regarding Wya, i think he often uses an auto-wah on the clav (played with its damper bar down!) to get more 'clank':

I have a tape cassette of 'In crowd' where the keyboards are organ, wurly and Solina string, so i think they use what fits in their style and what was available...

In the 'younger' days, i often saw Reggae keyborders using the piano sound of the Korg M1.

regrads, Jens :-)

Hi .-)

The 'noise' you mention is only a small matter of components... Do you have your sustain bar grounded? To me, this is the most important thing to do on any Rhodes, since any static of RF noise is coupled via the sustain bar into the the pickup colis, esp. in the lower keyboard range, because bar and pickups are pretty close there.

The 10K / 10K / 1uF circuit was just a treble roll-off design, it doesn't affect the bass. It indeed affects the overall volume if you turn up full, since the 1uF cap cuts out too much treble.


Hi .-)

Here's what i'm running in the effetcs loop of my VV 64:

Boss BluesDriver: Not as an overdrive, but as a clean / solo boost and making the signal a bit more cutting and 'gritty' when on.

George Dennis GD-30 Wah: Optical wah which sounds not so 'peaking', noisy and bass-cutting than a CryBaby, but no so bland than a Morley.

Mutron Phasor 2: Simply a good sounding phaser with a different edge than SmallStone or Phase 90 (which i like, too!)


The Fender Rhodes Electric Piano / Re: Rhodes pickup screwdriver test
« on: February 07, 2018, 01:03:10 AM »
Hi .-)

The first 24 pickups on a 88 are wired in groups of 2. Then up to pickup 75, the wiring follows the regular 3-in-a-group scheme.

The last 13 pickups are wired:
1 Group of 3
3 Groups of 2
4 single pickups wired according to the 'back and forth'-scheme.

The 4n7 cap forms a high-pass to eliminate low frequency 'thumps' when the hammer strikes the tine.

Note that the last 13 pickups + high-pass are in parallel to the rest of the pickups, which forms a very complex inductive / capacitive circuit. This is part of the 'special' 88 Sound.

PS: Allways check the 4n7 cap to be REALLY a 4n7 cap. In the past, we had three 88 pianos with a 47n (!) installed right from the factory ! This will change to sound dramatically to a very dull, muffled Sound.


The Fender Rhodes Electric Piano / Re: Rhodes pickup screwdriver test
« on: February 06, 2018, 10:14:01 AM »
Hi .-)

88s are wired different on the last octave. Here's a schematic:

The last 12 pickups are connected via a condenser (the small part on the far right side of the harp) which forms a high-pass filter.


Hi .-)

The piano will work even without this wire. The wire doubles the connection that is already established by the aluminum tape that connetcs all pickup mounting brackets to ground.

The bare wire is used to connect the damper bar to ground, thus eliminating hum and buzz. If the damper bar is not grounded, capacitive coupling into the damper arms will induct hum and buzz to the pickups. Remember, the damper arms are going under the pickup coils, esp. in the upper ranges.


Hi .-)

Looking at several Sidekick schematics, it's possible that it's the input stage of the amp that distorts. The volume pot works as a gain adjustment for the Input stage, so the pot doesn't affect the signal itself. If the input level gets to high, distortion will occur no matter how low the pot is turned.


Hi .-)

If your pickups are adjusted for a hot output (close to the PUs), distortion beginning at around 7 on the scale could be normal, due to the internal gain structure of the preamp. The Input stage has a gain of 22, the output stages add an additional gain of 2,2. Assuming an average harp output of 0,5Vpp on hard strikes, the output voltage of the pramp will be at around 25Vpp !

If you additionally increase the treble or bass, this voltage will increase rapidly, so distortion will occur.

Does the Avion supply +/-15V or maybe +/-12V? Did you check that?  If the preamps runs on +/-12V, ist pretty clear that distortion will appear earlier because of the lower headroom....


Hi .-)

Ist all in the text.... He's just doing what an audio-experienced tech should do to every Wurly. He just used quality parts at the important spots and did a clear re-wiring of power and audio cables.

No rocket sience... ;-)


Buying / Re: Looking for a Vintage Vibe piano in Europe
« on: January 06, 2018, 03:49:51 PM »
Hi .-)

EMC is the official VV distributor in EU:


Other Keyboards & Software Synths / Re: Help wiring a Pianet T transformer
« on: November 22, 2017, 08:46:27 AM »
Hi .-)

Since i have a Pianet T actually on the bench, i took some measures.

Input DC resistance is 38 R
Output DC resistance is 2,57 k

Seems to be a 5:1 transformer that is used 'backwards'... When i feed 400Hz / 100mVpp into primary, i get roundabout 580mVpp on secondary (into a 1 Meg load...)

hope this helps bit...


Hi .-)

The 300 is a model that was build by Wurlitzer Germany (Hüllhorst is just around the corner from me, between Hannover and Bielefeld) for europe only. I think is was made to compete with the electric 'Home'-pianos like the Hohner Electra.

The innards and circuit are the same as the EP201, a EU-Version of the original 200. The amp is close to the 200 schematic, but has some additional things like a trimpot for adjusting tremolo Speed and two trimmers for power amp bias.

Until last year, they were building and servicing Wurlitzer musicboxes at Hüllhorst, but they are closed now and the wisdom about Wurlitzer pianos is long gone there...

Here's a pic of the factory in Hüllhorst....

regards, Jens

The Fender Rhodes Electric Piano / Re: Quintessential Phased Rhodes Songs
« on: October 07, 2017, 03:43:47 AM »
I prefer the Mutron 2, but i know what you mean... Phasing is an effect that works pretty well with Rhodes...

Steely Dan - Babylon Sisters Live
Bill Withers - Just the two of us
Billy Joel - Just the way you are

Jenzz .-)

Hi .-)

Seems that the connetor on the cabinet has been replaced. This is not original. The connector is a japanese microphone connector which is normally used for Mic connection on amateur radio etc...

Sorry, i only found a german site ad hoc....


Hi .-)

Check this out:

...but ii is in german....

The effect inside the Pianet M is a Chorus based on the TDA1022 chip...


The Wurlitzer Electric Piano / Re: Using a Wurlitzer in Europe
« on: August 15, 2017, 03:08:16 PM »
The move isn't permanent so the transformer is probably the way to go.  Do you know how many watts the 200A pulls?  Wondering if something like this is sufficient:
Thank you both!

This thing is rated 200 Watts which is more than enough... A 200A ist rated 55W max.


The Wurlitzer Electric Piano / Re: Using a Wurlitzer in Europe
« on: August 15, 2017, 09:07:49 AM »
Hi .-)

Switzerland has 230 V, so you will need a step-down converter, or have to replace the transformer.


The Wurlitzer Electric Piano / Re: Cannot adjust letoff on 200a
« on: August 07, 2017, 03:29:20 AM »
Hi .-)

The problem is that the jack trips without touching the adjusment screw before. I have seen this on many Wurlitzers. In some cases, the jack spring was not tight enough, but in most cases, the felt at the hammer butt became fluffed, getting to big and then actuating the the jack.


Btw, did you check the two 4A fuses located near the speaker connectors on the amp chassis?


Hi .-)

What about the headphone connector? Are both channels working? If so, check the headphone socket. Remind that this socket is a switching socket which cuts off the speakers when a headphone is plugged. The switches inside the socket are always prone to corrosion, so check These...


"thumbs up"  8)

p.s.: regarding your Avatar: Is this the 'PianoArc' keyboard?


Other Keyboards & Software Synths / Re: Microphonic clavinets
« on: July 16, 2017, 10:39:54 AM »
Hi .-)

In most cases. this is caused by broken pickup housings, so the magnets and coils come loose and therefore respond to case vibration.

Look out for cracks on the pickups mounting wings... It can be fixed in most cases by glueing...


Other Keyboards & Software Synths / Re: Clavinet Pickup Testing
« on: July 16, 2017, 07:51:44 AM »
Yes, this values are ok....


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