Replacement hardware for Pioneer Speaker Plugs?
- Thread starter EastPoint
- Start date
The Fuxtor
Addicted Member
bring the plugs to Home Depot and start trying out different screws until you find the right ones.....
john stumpf
Super Member
if original they are metric
ETLS
metacarpophalangealcranium
EDIT: I KNEW that I should have WAITED to try them out - they aren't ok,
after a few turns the screw starts to bind up.
They are an ODD size thread.
I have a few Pioneer Speaker Plugs that are missing screws, and coincidentally last week I dug out the engineering references and the good old micrometers.
NOPE:
They are #6-40 FINE(UNF) thread. An ODD size I have found, and so hard to find, that when I DID find #6-40 UNF pan head Phillips screws,
Well, I now have 300 of them on order. No fancy star washer style underside, I'll just add some star washers for better contact.
(1/2" so they will have to be ground down)
Wow, what a coincidence.... I ordered them at the start of the week.... hmmm - what got me going on them at that time???
after a few turns the screw starts to bind up.
They are an ODD size thread.
I have a few Pioneer Speaker Plugs that are missing screws, and coincidentally last week I dug out the engineering references and the good old micrometers.
NOPE:
They are #6-40 FINE(UNF) thread. An ODD size I have found, and so hard to find, that when I DID find #6-40 UNF pan head Phillips screws,
Well, I now have 300 of them on order. No fancy star washer style underside, I'll just add some star washers for better contact.
(1/2" so they will have to be ground down)
Wow, what a coincidence.... I ordered them at the start of the week.... hmmm - what got me going on them at that time???
Last edited:
Watthour
Electron Rancher - JS3600
EDIT: I KNEW that I should have WAITED to try them out - they aren't ok,
after a few turns the screw starts to bind up.
OK, now I am trying 3.5mm - 0.6mm at 6mm long. The fractional size binds up after a few turns.
Ordering them...
after a few turns the screw starts to bind up.
OK, now I am trying 3.5mm - 0.6mm at 6mm long. The fractional size binds up after a few turns.
Ordering them...
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I think we can agree that it is not imperial and that they must be JIS(ISO), ? is what is the thread
https://www.engineeringtoolbox.com/metric-threads-d_777.html
so there is M3.5-0.6mm(coarse) and M3.5-0.35(fine)
Good Luck to you Mark
https://www.engineeringtoolbox.com/metric-threads-d_777.html
so there is M3.5-0.6mm(coarse) and M3.5-0.35(fine)
Good Luck to you Mark
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restorer-john
Addicted Member
Last edited:
Good job John, helps to have one to measure and the tools
My calipers look almost the same as yours, except mine is black and I have a hold button, never use it. Mine eats batteries, so I run it off a power supply, a real hack
Hey I could use a few of those plugs I am too cheap, using the converted plug trick, looks ugly, good thing they are hidden. Those old models have some weird stuff, I broke the ground for the tape-1-in jack on the qx-9900, the damn rca l/r jacks are so close together that the plastic shrouds on the cables bind together. I have to make/mod/find special cables for the damn thing and fix the broken jack. got an alligator clip making the ground or it hums like heck.
My calipers look almost the same as yours, except mine is black and I have a hold button, never use it. Mine eats batteries, so I run it off a power supply, a real hack
Hey I could use a few of those plugs
I am too cheap, using the converted plug trick, looks ugly, good thing they are hidden. Those old models have some weird stuff, I broke the ground for the tape-1-in jack on the qx-9900, the damn rca l/r jacks are so close together that the plastic shrouds on the cables bind together. I have to make/mod/find special cables for the damn thing and fix the broken jack. got an alligator clip making the ground or it hums like heck.
restorer-john
Addicted Member
No worries I figure the post may help others down the track. The ones pictured above are off a QX-8000a I picked up several years ago to restore. It came with all four in the back which is rare.
It's been sitting here in a partial state of restoration for at least 5 years. I really should get to it as it takes up three times as much room in pieces than if assembled! It stalled when I got to the indicator lights for the quad matrix- they were all out and I lost interest.
edit: just looked at the RCA jacks on my QX- they are really close together aren't they? Have to use old-skool small body RCA plugs.
It's been sitting here in a partial state of restoration for at least 5 years. I really should get to it as it takes up three times as much room in pieces than if assembled! It stalled when I got to the indicator lights for the quad matrix- they were all out and I lost interest.
edit: just looked at the RCA jacks on my QX- they are really close together aren't they? Have to use old-skool small body RCA plugs.
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Well, this is anticlimatic, but necessary.
I have CONFIRMED with M3.5-0.6 x 6mm long screws that this is the CORRECT screw for the Pioneer speaker plug threads.
They went in smoothly, all the way down.
Use an internal or external star washer (like watthour posted)
and for best contact, the speaker wire goes between the star washer and the head of the screw.
Which is the same thing as saying the star washer is BELOW the speaker wire.
That way the prongs dig into the threaded terminal and the speaker wire
instead of placing the speaker wire below the star washer and the screw head
the prongs dig into the speaker wire and the bottom of the head of the screw, which then current has to flow through the screw body and then the screw threads to the threaded terminal.
I have CONFIRMED with M3.5-0.6 x 6mm long screws that this is the CORRECT screw for the Pioneer speaker plug threads.
They went in smoothly, all the way down.
Use an internal or external star washer (like watthour posted)
and for best contact, the speaker wire goes between the star washer and the head of the screw.
Which is the same thing as saying the star washer is BELOW the speaker wire.
That way the prongs dig into the threaded terminal and the speaker wire
instead of placing the speaker wire below the star washer and the screw head
the prongs dig into the speaker wire and the bottom of the head of the screw, which then current has to flow through the screw body and then the screw threads to the threaded terminal.
