RF Choke - Massive - How to install?

Pictures?  

Dimensions?  

Digikey part number?

aussteve posted:

Pictures?  

Dimensions?  

Digikey part number?

22uh 11A RF Choke

Well, 11 amp chokes have to be massive, they carry a lot of current!  However, I don't think I'd call a 1" round x .6" high coil "massive".

You can just solder the wires to the 16ga wire, no special support needed.  You can super glue them to a surface if you feel the need to mount them.  Avoid putting anything magnetic through the donut as that will affect the indictance.

gunrunnerjohn posted:

Well, 11 amp chokes have to be massive, they carry a lot of current!  However, I don't think I'd call a 1" round x .6" high coil "massive".

You can just solder the wires to the 16ga wire, no special support needed.  You can super glue them to a surface if you feel the need to mount them.  Avoid putting anything magnetic through the donut as that will affect the indictance.

It does appear that the leads are pre-tinned.
I also really thought that the leads were much heavier, but upon further review, it is about a 16 gauge wire.
Do you just wrap the stranded wire around or to you fan them out and then press in place and twist them into place?

So, is there anything inside there, other than the coil?
How does that choke off the RF Signals from getting through?

It's a coil on a ferrite core.  The inductance acts as a resistance to AC, the higher the frequency, the greater resistance.

gunrunnerjohn posted:

It's a coil on a ferrite core.  The inductance acts as a resistance to AC, the higher the frequency, the greater resistance.

OK, so there is s ferrite in there. Now that makes sense. It also accounts for some of the size. 

Thanks for the explaination.

BTW, how do you insulate these guys? You could add shrink tubing over the soldered joints of the wire to the leads, but that would still leave a possible small exposed spot at the base of each lead.

Liquid tape.

Thanks. That was quick.

Do you put shrink tube as far as you can, then add the liquid tape at gap at the base of the ciol?

I just use all liquid tape and apply a second coat after the first is good and dry.

Great information.

Thanks again

Does this eliminate the need to install a 22uf choke in TMCC engines?

If not, what additional benefit is provided?

No, this does not eliminate the need for a choke in TMCC engines. Anything that has capacitors or capacitance can interfere wit the DCS signal and will need an inductor/choke installed.