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  #46  
Old 05-22-2019, 06:50 AM
Cuki79 Cuki79 is offline
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Here is pickup v1.3. It is the same as pickup v1.0 but with feet (feet footprint behind smaller than the tape of the last experiment)



recording with 4.2 Mo input impedance preamp

The G note on the low E string screams and saturate.

Note that 3 strings broke and were changed. The guitar is acoustically brighter (old strings were EXPs from january)

As I understand, the more contact surface, the more low end and low-mid growl...

Next time, I will try the smaller enclosure under the saddle line...
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  #47  
Old 05-24-2019, 10:37 AM
Cuki79 Cuki79 is offline
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I made a smaller box and placed it under the saddle line

The tone is very clean there

1) With 4.2 Mo input impedance FET preamp
2) Direct



The only problem is that I had to uninstall it once and I struggled against the tape.... Then I heard a "crack"

Now the guitar lost all its low end... Hope is just the pickup and not a lose brace.

The guitar sounds acoustically like a V-braced Taylor or E10om... super bright.
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Martin D-18 (2012) Lyric gilgaus mod + EPSI IR
Martin HD-28 (2014) Trance Audio Amulet M-V T+ DIY Axoloti IR
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Gibson Les Paul Standard 1958 Reissue (2013)
Fender Stratocaster American Vintage 1954 (2014)
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  #48  
Old 05-24-2019, 10:54 AM
jonfields45 jonfields45 is offline
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Quote:
Originally Posted by Cuki79 View Post
I made a smaller box and placed it under the saddle line

The tone is very clean there

1) With 4.2 Mo input impedance FET preamp
2) Direct



The only problem is that I had to uninstall it once and I struggled against the tape.... Then I heard a "crack"

Now the guitar lost all its low end... Hope is just the pickup and not a lose brace.

The guitar sounds acoustically like a V-braced Taylor or E10om... super bright.
I am not sure I can remember every sound sample in this thread, but this one sounds the best...even great.
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Notepad-12FX, QSC CP8 (21 lbs) high/behind
Lately gigging two SM58>Y>CP8, HFN>CS-3>GE-7>TRS>CP8 3.5mm

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  #49  
Old 05-24-2019, 01:09 PM
SpruceTop SpruceTop is offline
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Quote:
Originally Posted by Cuki79 View Post
I made a smaller box and placed it under the saddle line

The tone is very clean there

1) With 4.2 Mo input impedance FET preamp
2) Direct



The only problem is that I had to uninstall it once and I struggled against the tape.... Then I heard a "crack"

Now the guitar lost all its low end... Hope is just the pickup and not a lose brace.

The guitar sounds acoustically like a V-braced Taylor or E10om... super bright.
Cuki, your latest samples are as good as most direct-recorded samples out there and would sound really good over a PA speaker. I have no doubt that with your determination and ongoing research and development on this and future systems that you will no doubt develop a marketable pickup system if you ever should choose to go commercial! Thanks and I look forward to your continuous experimentation and hope there isn't any damage to your guitar.
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Last edited by SpruceTop; 05-24-2019 at 01:59 PM.
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  #50  
Old 05-24-2019, 01:48 PM
rockabilly69 rockabilly69 is offline
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You're really getting there, keep up the good work!!!
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  #51  
Old 05-24-2019, 03:28 PM
Cuki79 Cuki79 is offline
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Actually, it is more balanced, more immediate but less mic-like... I am not fan of the attack...

Anyway the 3D-print enclosure needs much improvement. The cable was hanging frol the PVDF ink printed connection and ruined it with its weight.

I need to design something better that would enable proper shielding.
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Martin D-18 (2012) Lyric gilgaus mod + EPSI IR
Martin HD-28 (2014) Trance Audio Amulet M-V T+ DIY Axoloti IR
Eastman E6OM (2019)
Taylor GS Mini-e Bass (2017)

Gibson Les Paul Standard 1958 Reissue (2013)
Fender Stratocaster American Vintage 1954 (2014)
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  #52  
Old 06-16-2019, 12:32 AM
Cuki79 Cuki79 is offline
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Default Pickup v3

I know... nobody saw pickup v2... The main problem was the PVDF film hanging folded because of the weight of the connectors... so pickup v2 died.

The new box designed to have the connectors in the box.



I also packaged the 5.6 Mo input impedance preamp



The pickup is positionned under the saddle line. I get similar tone as before.



1) It sounds better than I thought. The acoustic tone might be slightly affected. As if the box gave the ADGB strings a bit stiffer response (the pickup does notcover the whole saddle area)

2) There is a HUGE hum. I first tried to shield the box but had other problems to solve and got rid of the shielding. Note that copper tape shielding really damped the response of the wall it was applied too.

3) The guitar feels much heavier. That was to be expected with the bulky preamp and battery.

4) 1 Mohm input impedance should be enough. We don't need so much low end.


To be continued...
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Martin D-18 (2012) Lyric gilgaus mod + EPSI IR
Martin HD-28 (2014) Trance Audio Amulet M-V T+ DIY Axoloti IR
Eastman E6OM (2019)
Taylor GS Mini-e Bass (2017)

Gibson Les Paul Standard 1958 Reissue (2013)
Fender Stratocaster American Vintage 1954 (2014)
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  #53  
Old 06-16-2019, 08:15 AM
SpruceTop SpruceTop is offline
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Thanks, Cuki, for keeping us informed of your pickup development journey!
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Martin HD-28 (Trance M-VT)
Martin D-18 (Schatten HFN Artist Plus 2)
Martin D Jr (B-Band A1.2N)
Taylor 614ce (ES2)
Taylor 618e (ES2)
Taylor 356ce (ES2)
Taylor 322ce (ES2)
Taylor GS Mini-e Koa (ES2)
Epiphone DR-500MCE (Shadow eSonic2)
Ovation Elite Plus Contour (OpProStudio)
Ovation VXT Electric (two Duncan '59/Fishman Acoustic Bridge)
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  #54  
Old 06-16-2019, 09:01 AM
Cuki79 Cuki79 is offline
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Quote:
Originally Posted by SpruceTop View Post
Thanks, Cuki, for keeping us informed of your pickup development journey!
Thanks Ken,

I think suspended PVDF film is a dead end. The pickup is way too bulky. Eventually I seem to get a brighter tone comparable to the HFN. I iitially thought the HFN was bright because of the bridge design itself... But it might be just the coupling with the top.



Maybe a huge surface sensing pickup is equivalent to multiple sensors that interfere destructively. I thought it would have rather kill the high-end than the mids.

I will probably try to shield this pickup first because I need an elegant way to shield the pickups, then I will probably go for a dual tiny sensor design (ex PTW#54 or Dazzo).

Also I think I will work on an external preamp design.

PS: Note that making pickups is much harder than making IR!!!
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Martin D-18 (2012) Lyric gilgaus mod + EPSI IR
Martin HD-28 (2014) Trance Audio Amulet M-V T+ DIY Axoloti IR
Eastman E6OM (2019)
Taylor GS Mini-e Bass (2017)

Gibson Les Paul Standard 1958 Reissue (2013)
Fender Stratocaster American Vintage 1954 (2014)
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