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Post subject: Re: Reuild a Fender JP 90
Posted: Fri Mar 20, 2015 2:28 pm
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Thanks for the reply.

At top of the neck under the tuning keys it definitely says Fender JP-90.
Looking at the photos above my post it has the same pickups. One dual pickup
toward the neck, and one single toward the bridge. Same mini toggle, and 1 each
volume and tone pot. No cracks on the pick guard.

I would post a photo of it but don't see anywhere to upload one? Can you upload
a photo?

I did read somewhere about adding a washer above the adjuster, and tried that
and again no result. Now that I know there is a problem with it it's driving me nuts.
I am only aware of the one music store here in Texarkana, TX. Any recommendations of
where/who I could send it to? There is some sentimental value to it, but if this bass isn't
worth fixing someone please tell me. I would hate to spend a couple hundred bucks on a bass
that's only worth a hundred.

Thanks again for the info!


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Post subject: Re: Reuild a Fender JP 90
Posted: Thu Aug 06, 2015 4:09 am
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Any idea on replacement necks? I have a bowed one that is terminal.

Thanks.


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Post subject: Re: Reuild a Fender JP 90
Posted: Sun Aug 09, 2015 9:32 am
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Location: SW Florida
My 90 JP-90 adjusts from the head stock. I do not find where any changes to that were made in its four years of production, so I am guessing you have a replacement neck to start off with.

Just for giggles, why not pull the neck off and see what identifying marks you can find? Wouldn't it be funny if you came up with an old pbass neck that is worth three times the value of the bass? Probably not, but it would be interesting to take a peek.

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Post subject: Re: Reuild a Fender JP 90
Posted: Sun Aug 09, 2015 9:43 am
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Value of a JP-90 is about $400, give or take depending on where you live. It is a much better bass than $400 and I keep waiting for its value to take off. It's active brother, the Prodigy, isn't faring much better.

Not sure about a replacement neck, but it's profile reflects a pbass, so I would start there.

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Post subject: Re: Reuild a Fender JP 90
Posted: Sun Aug 09, 2015 4:58 pm
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affprod wrote:

Value of a JP-90 is about $400, give or take depending on where you live.



That's exactly what I sold mine for.


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Post subject: Re: Reuild a Fender JP 90
Posted: Sat May 14, 2016 9:50 am
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These posts can never be over used. May 2016 and Dave has answered my questions for my JP90 to!
This is a wonderful resource and history will show that as it did today! Iwas asking brother dave questions years ago and blow me down he is still the go to guy after decades! Thanks to all the other guys who give their time and knowledge to!


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Post subject: Re: Reuild a Fender JP 90
Posted: Sat May 14, 2016 9:59 am
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Oh yes. The neck on my JP90 has a paper label with lines on it and the name looks like 'Manny' or 'Maddy' in a felt tip black marker. There is a large scruffy looking black number '1' or '2' in thick black marker and in what looks like red or purple pen what looks like a large 'G'small 'e' Ge. i have a photo on my phone but dont know how to send it!


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Post subject: Re: Reuild a Fender JP 90
Posted: Sat May 14, 2016 10:05 am
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bdwgml@gMail.com wrote:
affprod wrote:

Value of a JP-90 is about $400, give or take depending on where you live.



That's exactly what I sold mine for.



I also sold one for $400, but included a case & a Frontman amp.


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Post subject: Re: Reuild a Fender JP 90
Posted: Wed Feb 28, 2018 8:32 am
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just updating this, since my recent purchase.

these are now going for $500+ average. (GC and Ebay and Reverb)

a beat up JP90 might sell for $350-$400 without case.
seems an average shape/good to very good $500-$600
Mint $700+ ..but not sure its selling?
info from Closed sales posts.

per my research, US made woods and electronics, (MIM didnt have CNC's yet) and the assembly might have had some work in Ensenada (paint? sanding?)
a couple necks one with heel truss and the other headstock.
came in three colors, all with black single ply pickguards (new replacements available through pickguardheaven) 1990-1993.

a lot of posts for the tones, if you can get past the pickguard looks... :mrgreen:


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Post subject: Re: Rebuild a Fender JP 90
Posted: Wed Mar 11, 2020 11:43 pm
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Thought I'd chime in here with my story. I've been thinning the herd of guitars and instruments that I don't play much and decided that my JP90 is a keeper and I'm fixing it up.

I bought my JP90 new from Guitar Center when they were being closed out, I think in late 93 or early 1994. As I recall, they had a half dozen of them in a plastic trash barrel and a blow-out sale sign. I took a black one home that day.

Over the years, I've had other basses, much nicer ones even. But I've kept this one. It's been to a lot of gigs, though I don't play out much anymore.

While it is an inexpensive bass, and it shows, it is good where it counts. The neck on mine has always been very good, plays fast and easy, adjusts up nice and straight.

I slapped a Leo Quan Badass-II bridge on it a long, long time ago. Mostly because it looked cool with a black bridge on it. It seems to couple better to the body too than the lightweight stamped bridge (still in a box in the attic!).

That's it. Played it that way for years and years. Scratchy pots, crackly jack, mediocre pickups, wobbly pickguard, pickups very misaligned and all.

Why? It is a very comfortable player and I never worried about it. Tool for the gig, did the job.

Since I'm keeping it, decided to fixer up.

The original specs:

Neck date stamp is 1993, looks like Feb 14, but it is smudged and I can't tell the month. So, it had to be after that. The pots are "import" mini metric type with coarse spline shafts. The pots are both 500k audio taper, 0.068µf tone cap and a 3-way pickup selector, "import" type output jack, as a standard Switchcraft jack will not fit the body route.

Pickups are the same as Squier models of the same era, ceramic bar magnets, soft iron pole pieces, coils encapsulated in epoxy in the covers.

Single-ply pickguard, measures 0.60" (1/16th inch).

Appears to be alder body, could be basswood. Thick heavy urethane finish. It's so thick, I swear they dipped it.

The neck is pretty much Jazz neck. 1.5" nut width (1.505 with my micrometer). I think it is 9" radius. Head stock truss rod adjuster, surrounded by black plastic plug around the hole. "Licensed by Schaller" tuning keys. Skunk strip on back of flat sawn maple neck with no figuring. Rosewood fretboard is dyed to darken it. Not sure of the species, but that was pretty common on inexpensive instruments of the era.

Bought new without a case. I've never owned a case for it.

Mechanically, it has alway played very well. The neck is very straight and doesn't buzz even with very little relief. Sound wise, well, it makes bass sounds. Nothing to write home about. The electronics are pretty cheap and definitely the weak point.

Mostly though, it has held up over the years (decades) of play. It has some wear on it and I've cleaned the pots about 20-dozen times and soldered broken wires more than once.

What needs fixing:

1. Nut has a crack under the G string.
2. Pots and jack are pretty worn out.
3. Frets are pretty good, just need a minor dress and setup.
4. Pickups were installed way off center at the factory.

What I want to upgrade:

1. Electronics. Always felt this bass was more capable, and the pickups were holding back. The pots have been a repeated annoyance. There's not a speck of shielding inside, and noise sometimes has been an issue. Besides, the way-off center, misaligned pickups have always kinda bugged me.

2. Pickguard. Thin, wobbly, unshielded and some visible factory-filing marks to fit it to the misaligned pickups, just say, "upgrade me". Lots of visible wear on it.

3. Tone/volume configuration. Blending controls and a master tone would be cool. Can live with the 3-way switch, but blending is cooler.

Weirdly enough, the hold up is originally misaligned pickup installation from the factory. Looks like the drilling jig wasn't locked down or something. But they then hand-filed the pickguard cut outs to fit it and get it screwed to the body.

So I can't replace the pickguard without altering the new one. I can't re-center the pickups without cutting big gaps around the pickup cutouts to get it to the screw holes in the body, which are also not where they should be.

Chicken and egg, indeed.

So, I double checked and bridge and neck, spot on, exactly right placement.

Experimentally, I re-mounted the pickups based on string placement in the right place. But needed a hack saw to align the pickguard with the body holes.

Hmm.

Hatched a plan. 2 new pickguards. One black one in .090 thick and a clear one in 0.125 to use as a tool. WD products lists them on their webstore. So, they're ordered.

Plan is to use the clear pickguard to align the pickups, control pots, jacks and body route all into the right spots. Should be able to see how it all fits, get the pickups properly located, and see if full size pots will fit or not. I know a Switchcraft jack is a no-go already.

Once located, I'll mark the new screw holes for the pickups for drilling. Then, plug the original pickup screw holes with skinny dowels. Most likely, will need to plug the original pickguard mounting screw holes in the body too.

I ordered a P-J set of Fender's new "Yosemite" pickups. They're on sale and a good deal. I've played the current, "American Performer Precision Bass" which comes with them. All in all, pretty good. Not sure about the "greasebucket" tone control but I'll go play it some more and think about it.

So, there's my story. When the rest of the parts come in, I'll post more as I go.


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