Pickup Wiring " Gods " ..... need your help re: Wiring a P90 Dummy Coil in Series ?

[ben ifin]

Pickup Wiring " Gods " ..... need your help re: Wiring a P90 Dummy Coil in Series ?

Hi aPickup Wiring " Gods "

I have a single GFS P90 pickup guitar and am installing a dummy P90 Coil.

I have another identical GFS P90 Pickups. Both these identical GFS P90's come in bang on 9k

I have removed the magnets from the Dummy P90 and left the screw poles in - I have tested it and it is still bang on 9k

Each pickup has a " White " HOT a " Black " Ground and " Silver Sheild " Ground.

The Guitar has 1 x Volume. There is *NO* pickup selector. There is *NO* tone control. There is an Output Jack.

The wiring is quite simple and is as follows:-

a -> Black + Silver Shield for both pickups are grounded to the back of the vol pot
b -> White [HOT] lead from the Dummy P90 is connected to the White [HOT] lead of the Active P90
c -> then the combined White [HOT] lead is soldered to Lug 1 on the Vol Pot
d -> Lug 2 on the Vol Pot is going to the Output Jack
e -> Lug 3 of the Vol Pot is grounded to the back of the Vol Pot

Result

-> No 60cycle Hum + Super quiet = good
-> Works = good

My Problem

There is a really noticeable drop in pickup output / volume - I measured it and it has dropped from 9k to 4.2k - as such, I [presumably] have therefore wired the P90 Dummy Parallel to the Main Pickup instead of series


My Question

-> what do I need to change to my wiring above in order to run the Dummy P90 in Series with the Main P90 ?

All help would be gretaly appreciated.

Ben

 

[Funkfingers]

Re: Pickup Wiring " Gods " ..... need your help re: Wiring a P90 Dummy Coil in Series

Re: Pickup Wiring " Gods " ..... need your help re: Wiring a P90 Dummy Coil in Series

Detach the two white conductors from each other.

Leave both metal braid screens grounded.

Leave the black conductor of the dummy coil grounded.

Disconnect the black conductor of the operational P90 from ground.

Connect the white conductor of the dummy coil to the black conductor of the operational P90.

Connect the white conductor of the operational P90 to the volume pot input lug #1.

*

I suggest doing things in this order for a reason. It gives the option to make the dummy coil switchable. This might be handy for situations where you need the true single coil P90 tone. It would also permit direct A/B comparison of with and without dummy coil in circuit.

 

[ben ifin]

Re: Pickup Wiring " Gods " ..... need your help re: Wiring a P90 Dummy Coil in Series

Re: Pickup Wiring " Gods " ..... need your help re: Wiring a P90 Dummy Coil in Series

Hi Funkfingers

Firstly my huge sincere thanks for responding - it is massively appreciated ��

One last clarification please just to double-check due to my lack of skill and confidence:-

-> in this scenario of running a P90 dummy coil in series, the White (hot) of the active P90 will remain *not* connected to anything and as such I can just wrap the loose end of it in a bit of electrical tape ?

My genuine thanks again.
Ben

 

[ben ifin]

Re: Pickup Wiring " Gods " ..... need your help re: Wiring a P90 Dummy Coil in Series

Re: Pickup Wiring " Gods " ..... need your help re: Wiring a P90 Dummy Coil in Series

Oooops ..... apart from my sincere thanks above, please ignore my question as I just realized I miss-read your steps and now fully understand them .... ouch at my end.

Thanks again. I'll do this in the next day or so and report back.

Ben

 

[ben ifin]

Re: Pickup Wiring " Gods " ..... need your help re: Wiring a P90 Dummy Coil in Series

Re: Pickup Wiring " Gods " ..... need your help re: Wiring a P90 Dummy Coil in Series

Hey Funkfingers

Did the Dummy Coil exactly as you wrote - works perfectly

No loss in output or grunt at all

A slight frequency shift in the top end but as I use a Kemper. an ever so slight tweak to the Amp Definition and Clarity ...... done ..... totally hum-free grinding P90 with all the full-range tone.

Why didn't I do this sooner

My huge thanks again,
Ben