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FDP Forum / Guitar Mods, Repairs, and Projects / What is this Crossover component?

wborys
OldFartBassPlayerWalt

Robbinsville, NJ

what do you mean the bass is too loud?
Nov 13th, 2017 08:51 PM   Edit   Profile   Print Topic   Search Topic

I have an old 15" bass cab with a small piezo horn. The component wired in series with this horn had one of its lead broken off.

Anybody venture a guess what replacement part I should look for?

oldFartTweeterLessBassPlayer Walt

what is a replacement for this sucker?

Mick Reid
Contributing Member
****

Australia

American-made in Oz!!
Nov 13th, 2017 10:51 PM   Edit   Profile   Print Topic   Search Topic

Walt, I'm sure someone else here can give you a more technically detailed answer, but I'll be first responder...

That's a Ceramic Cement Power Resistor. (non-inductive)

The value (I'm sure you got this much) is 20 watts, 8 Ohms with a tolerance of ±5% (J).

I have know idea what the other numbers are but I'd guess manufacture date maybe.


wrnchbndr
Contributing Member
**********
*

New Jersey

I'm back with the otters again
Nov 14th, 2017 08:12 AM   Edit   Profile   Print Topic   Search Topic

No more technically detailed info is required. It is exactly as described. 8ohm 20Watt resistor. Cheap and easily sourced. Mouser or Digikey.

Peegoo
Contributing Member
**********
**********
******

Enjoying

the downtime
Nov 14th, 2017 10:06 AM   Edit   Profile   Print Topic   Search Topic

These ceramic wire-wound resistors are fairly heavy; if it's 'floating' when you install it, place a generous blob of RTV 100% silicone between the resistor and the board it's soldered to.

The GE or DAP stuff available at Home Despot, etc., in the caulk department is good stuff.

The reason you need the RTV on there is because the mass of the resistor allows it to vibrate independently of its mounting board--and that's what fatigues and breaks the wire connections.

Don't use hot snot because these resistors can heat up in use; hot glue will melt around 150-200 degrees F. Cured RTV can take upwards of 400 degrees F.

Te 52

Laws of Physics

strictly enforced
Nov 14th, 2017 10:25 AM   Edit   Profile   Print Topic   Search Topic

Only thing to add is that it's cermet resistor, not a cement resistor.

cermet

(This message was last edited by Te 52 at 12:30 PM, Nov 14th, 2017)

Mick Reid
Contributing Member
****

Australia

American-made in Oz!!
Nov 14th, 2017 02:44 PM   Edit   Profile   Print Topic   Search Topic

"Only thing to add is that it's cermet resistor, not a cement resistor."

Hah!!! Damn auto-correct!

Thanks

FDP Forum / Guitar Mods, Repairs, and Projects / What is this Crossover component?




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