Factory lift pump & After market lift pumps Caution !

[W-T]

16 hours ago, CUMMINSDIESELPWR said:

being in ham radio this is all fact, the "ripples" are called harmonics 

 

 

Specifically "harmonics" are ODD and EVEN multiples of a fundamental frequency of interest. An example would be 27 MHz x 2= 54 MHz or simply the second harmonic of the fundamental. In a practice most EVEN order harmonics are self cancelling in a tuned circuit...the ODD harmonic multiples are removed by the filtering design of the coupled circuit or following tuned circuit. The Q factor will determine the depth of acceptance or REJECT of the unwanted extraneous RF energy in it's inherent design.

 

This thread is specifically referring to the WIDE BAND white noise or HASH being produced by the DC motor armature in a normal run-mode operation. This observation is only pointing out the "non-bypassed" production of common DC motors being utilized to power these gear-driven transfer pumps. 

 

Earlier in the thread I made reference to the "wild uncontrolled SPARK-GAP transmitter" which is the result of any analog brushed DC motor's armature in spinning motion. With little attention or engineering being applied to filter or suppress the results of "wide band hash" across the entire frequency spectrum we can expect to possibly have issues elsewhere in a closed 12 volt automotive electrical system. Again the shining example of correct DC suppression is the Carter Pump that all of us have decided to eliminate from our platforms due to the poor performance characteristics of fluid handling capabilities. 

 

The aspect of "ripple" is customarily a term applied to an extraneous AC waveform being imposed upon a DC rail or a pure DC 12 volt power supply having filter or rectification issues. This is observed in several threads where @Mopar1973Man has enlightened all of us to the health of the 135 Amp Alternators and their demise in clean operation.

 

I appreciate your observation and your choice of a mechanical transfer pump in order to avoid some of the pitfalls we all face when choosing an aftermarket electro-mechanical transfer pump. Perhaps the attention to this unfortunate over site on behalf of the leading manufacturers may lead to an improvement in the near future.

 

With respect,

W-T

First Class Radio Telephone

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Extra Class Certificate de: WA6Q

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[LorenS]

Very good article! On my phone, the photos are gone. Any chance they can be reincorporated? May help my understanding of the material.

[IBMobile]

All of the photos in his posts and articles have been removed; don't know why. 

[JAG1]

I think there are companies know how to remove bad reviews from the internet. I wonder about the photos in out forum now.