NO COWL BUMPS with C-85

[Woody]

Jim.
I have had the old lunch box mags and they re great. They will throw a 1" spark on test bench. HOWEVER when the coils get hot they will not crank. I swaped mine out 30 years ago. My neighbor has a good friend in magneto business. He asked him to rebuild some sf4's and he said throw them away. I will send you some s4rn's. That was from a well respected mag overhaul facility. Someone told me fresno air parts had some new coils for sale. My bet is they are 50 years old and have the same insulation. If they work for you that's great. I got tired of trying to hot start.

Tom

[Jim Herpst]

Scott,

Thank you for your straightforward input. As we get older hearing is even more important for safety. In fact I will be hiding a micro air radio or the like behind the left glove box door that will be only secured for show time for better receptionon on the recieve end .

I really can't afford to play around with this much as usability is key and I thought yours was better. I hear you on the thought with the vertical mount ...frankly I was on an assumption you had it there already and had great success.
Now I am leaning toward bumps. I have a metal man that can form them as part of the top cowling doors which is kind of nice.

[Scott]

I could not get the dipole to work on some frequencies, but I had it mounted in the fuselage not the fin. I think you'll have a higher probability of success with it mounted in the fin.

My ingnition is stock, unshielded (except the P leads are shielded). With the dipole the noise was tolerable, worse with the belly antenna.

My suggestion would be to go with a standard shielded system (on whichever mags you choose) including the P lead capacitors, except for the top plugs and clips ( not even the short shielded plugs will fit under my stock cowl). Terminate the shield on the top wires at the clips ensuring they can't short the ignition.

With this setup I expect the noise to be minimal and you can always turn off the top mag on the ground in marginal reception areas.

You can also add the ercoupe cups later if you want.

[Jim Herpst]

Good luck finding GOOD coils for those mags.

Oh really? I could see that with eisman mags but Bendix?.

Also to those responding this is a good valid and appreciated response I hope to continue to also recieve feed back to my orginal question on the harness and plugs.

Thank you all

[Woody]

Good luck finding GOOD coils for those mags.

[astjp2]

Rem37by plugs are short

[Jim Herpst]

Ok since I can mount a dipole antenna in the Tail (vert stab) as I am still uncovered what is the unshielded tribe using for a new harness as well as plugs. All new cowling is being installed. I am good with the Luscombe 8e Twin pipes but otherwise want to keep it as clean as possible. Still even going with the original air filters and dzus fasteners replacing the trunk latches as they were not original on an early 46. Idea is as clean as possible assuming no Cowl bumps>>>What new harness and plugs to go with.? I have an option to purchase a pair of SF4LN-21 Bendix cores for a reasonable price if that helps someone with an answer. I would like to purchase the harness ready to go. I can remove my old unshielded ends that are simple clip on the plug from the old 65.....