This is just a suggestion, but I'd try putting a big 'ol piece of flat
braided from the coil ground directly to the engine block, preferably with
internal toothed washers on both ends. Think really big, like 2 or 4 gauge.
It moves, it flexes, it grounds. Try an auto parts store. You need to ground
the coil to the engine.
Get a noise suppression choke assembly for the 12v input of the radio, one
with a decent sized toroid and as big an electrolytic as you can find.
We made some noise killing SOBs [classic meaning] that would even quiet down
a Leece Neville alternator. I can take a look see if we've got any in the
parts room if you want. We used them on some 'government' command centers
that are still in use today (and probably still classified). Let me know and
I'll see what I can do as long as it doesn't endanger national security.
And my follow-up question: are you trying to kill spark noise or alternator
whine or both?
PS no info on Texas, my friend.
Mark
> -----Original Message-----
> From: owner-gmcmotorhome
> [mailto
wner-gmcmotorhome]On Behalf Of
> LNelson208
> Sent: Friday, March 19, 1999 4:30 PM
> To: GMCMOTORHOME
> Subject: GMC: ignition noise and South Padre Island
>
>
> This is ham radio stuff......has anyone succeeded in quieting down the on
> board interference from ignition, etc, on the GMC. I am running
> an SGC 2000
> and SGC mounted at the rear. I have called Jacobs (although the
> old girl was
> "noisy", electrically, before the conversion), and they suggested
> electrically
> isolating the coil unit from the chassis. Of course the Jacobs
> coil is mounted
> to the sheetmetal bulkhead on the drivers side and just abeam of the
> distributor. I have not put an ohm meter on that sheetmetal
> bulkhead to see if
> there is a good ground path to the chassis. Just some food for
> thought. Also,
> since my Baja trip is spamed due to time constraints, the spousal
> unit and I
> are headed for the beaches of Texas, for some beach camping
> (boondocking). Any
> advice from you Texans about whether to go to S. Padre or Padre
> Natl Seashore.
> Help! All help is appreciated as allways. Larry Nelson, PB 75,
> Springfield, MO
>
braided from the coil ground directly to the engine block, preferably with
internal toothed washers on both ends. Think really big, like 2 or 4 gauge.
It moves, it flexes, it grounds. Try an auto parts store. You need to ground
the coil to the engine.
Get a noise suppression choke assembly for the 12v input of the radio, one
with a decent sized toroid and as big an electrolytic as you can find.
We made some noise killing SOBs [classic meaning] that would even quiet down
a Leece Neville alternator. I can take a look see if we've got any in the
parts room if you want. We used them on some 'government' command centers
that are still in use today (and probably still classified). Let me know and
I'll see what I can do as long as it doesn't endanger national security.
And my follow-up question: are you trying to kill spark noise or alternator
whine or both?
PS no info on Texas, my friend.
Mark
> -----Original Message-----
> From: owner-gmcmotorhome
> [mailto
wner-gmcmotorhome]On Behalf Of> LNelson208
> Sent: Friday, March 19, 1999 4:30 PM
> To: GMCMOTORHOME
> Subject: GMC: ignition noise and South Padre Island
>
>
> This is ham radio stuff......has anyone succeeded in quieting down the on
> board interference from ignition, etc, on the GMC. I am running
> an SGC 2000
> and SGC mounted at the rear. I have called Jacobs (although the
> old girl was
> "noisy", electrically, before the conversion), and they suggested
> electrically
> isolating the coil unit from the chassis. Of course the Jacobs
> coil is mounted
> to the sheetmetal bulkhead on the drivers side and just abeam of the
> distributor. I have not put an ohm meter on that sheetmetal
> bulkhead to see if
> there is a good ground path to the chassis. Just some food for
> thought. Also,
> since my Baja trip is spamed due to time constraints, the spousal
> unit and I
> are headed for the beaches of Texas, for some beach camping
> (boondocking). Any
> advice from you Texans about whether to go to S. Padre or Padre
> Natl Seashore.
> Help! All help is appreciated as allways. Larry Nelson, PB 75,
> Springfield, MO
>
