If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below. |
|
|
Thread Tools | Display Modes |
#11
|
|||
|
|||
best anti-RF ignition wiring TYPE
In article . com>,
> wrote: > > >There are only 2 types of RF supression wi resistive and inductive. > The latter is often referred to as "magnetic" and is widely available, >but it doesn't seem to work any better than the resistive type. A >significant amount of igniton noise comes from the connection between >the plug and the plug wire, and grounded metal shields over the boots >can help here. There are wire kits with these boots, mostly for German >cars, or they can be made with metal tubing slipped snugly over the >metal bases of the plugs. I recommend getting a copy of the ARRL Hints and Kinks for Radio Amateurs book... get one of the mid-fifties editions and there is a whole section on eliminating ignition noise with homebrew shielding over the plug wires and shield cans over the distributor. I agree that with modern resistive wires, things will be a lot better. Back in the fifties, plug wires were normally copper. Often folks would buy it on long rolls and terminate it in the shop themselves. Today, plug wires have a conductive element that is conductive plastic, usually a nylon with carbon in it, and the wire itself has a few kilohms of resistance. That, combined with a modern coil design, means you get less high frequency ringing after the initial spark impulse which cuts way down on the noise. --scott -- "C'est un Nagra. C'est suisse, et tres, tres precis." |
Ads |
#12
|
|||
|
|||
best anti-RF ignition wiring TYPE
N8N > wrote:
> >Just to clarify, he's talking about an Avanti here; having an >all-fiberglass body, suppressing ANY source of noise is of utmost >importance. I did not realize it was an Avanti. In that case, I think I would be worried less about noise issues than making sure the radio antenna had a proper centerpoise, because it can't use the metal body. The more _signal_ you get, the more noise you can live with. --scott -- "C'est un Nagra. C'est suisse, et tres, tres precis." |
#13
|
|||
|
|||
best anti-RF ignition wiring TYPE
63Avanti wrote: > now this is interesting, > I remember fabricating for my neighbor's '62 Ford a metal can with > braided shielded wires to cover his distributor and cables out to the > plugs. I no longer knew when he drove out of his driveway by watching > the patterns on my TV (UHF). > > Now for the question. > Any one know if these boots, if self-fabricated, are essentially a > CYLINDER, grounded by contact with the engine block? On piston-engined aircraft the plugs, wires, and magneto distributor caps are all metal and are grounded. The shielded cable is grounded at the mag end and the plug end. There's no ignition noise from such a setup. Go he http://www.sacskyranch.com/eng67.htm Dan |
#14
|
|||
|
|||
best anti-RF ignition wiring TYPE
63Avanti wrote: > On Oct 29, 6:06 pm, wrote: > > A significant amount of igniton noise comes from the connection between > > the plug and the plug wire, and grounded metal shields over the boots > > can help here. There are wire kits with these boots, mostly for German > > cars, or they can be made with metal tubing slipped snugly over the > > metal bases of the plugs. > now this is interesting, > I remember fabricating for my neighbor's '62 Ford a metal can with > braided shielded wires to cover his distributor and cables out to the > plugs. I no longer knew when he drove out of his driveway by watching > the patterns on my TV (UHF). > Any one know if these boots, if self-fabricated, are essentially a > CYLINDER, grounded by contact with the engine block? Yes. I made some from conduit that extended about 2" above the plugs. I found it didn't mater whether or not the tops were covered with metal, but I applied a bead of silicone RTV to prevent the sharp edges from cutting through the wire insulation. I slit the bottom of each tube lengthwise to make it easier to press it easier to press around the hex part of the plug. |
#15
|
|||
|
|||
best anti-RF ignition wiring TYPE
"63Avanti" > wrote in message ups.com... > best anti-RF ignition wiring TYPE > > background: > I am getting my vintage AM/FM Delco reconditioned with the intent of > getting that "cruis'n feeling" I will also add non-vintage sound > deadening, and other electrical/static improvements noted here and > elsewhere. Thanks for the help. Check www.magnecor.com for EMI-reducing spark plug wires. |
#16
|
|||
|
|||
best anti-RF ignition wiring TYPE
That's the same outfit that told me they could supply 7mm wires but only if
I wasn't putting the stainless shielding back in place. Brooksie "Bob M." > wrote in message ... > > "63Avanti" > wrote in message > ups.com... >> best anti-RF ignition wiring TYPE >> >> background: >> I am getting my vintage AM/FM Delco reconditioned with the intent of >> getting that "cruis'n feeling" I will also add non-vintage sound >> deadening, and other electrical/static improvements noted here and >> elsewhere. Thanks for the help. > > Check www.magnecor.com for EMI-reducing spark plug wires. > |
#17
|
|||
|
|||
best anti-RF ignition wiring TYPE
|
Thread Tools | |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
AWA [OFFER] Ignition Cable, Ignition Cable Set, Auto Parts | [email protected] | General | 0 | April 9th 06 03:56 AM |
AWA [OFFER] ignition cable, ignition cable set, auto parts | [email protected] | General | 0 | April 4th 06 07:52 AM |
Electronic Ignition Wiring | ZhangLu | Technology | 3 | April 2nd 06 04:11 PM |
AWA [OFFER] ignition cable set, ignition cable | [email protected] | General | 0 | March 20th 06 11:51 AM |
95 BMW 525i Ignition problem. | [email protected] | BMW | 0 | March 17th 06 01:40 AM |