Dimarzio Parts suck

[Artie]

Re: Dimarzio Parts suck

I think on the OFHC thing you're intering into intentional overkill, although, I do think it makes a difference in speaker cables.

Absolutely! And thats exactly what the GuitarNuts site was talking about - the difference between high-voltage, high-current applications, and the low-voltage, low-current guitar signal.

... But I do wonder if we'd get the same specs that we get for resistance (using DC) as we would a say a sine wave at 1kHz., and at 10kHz.? :scratchch:

You know . . . I work in Navy electronic calibration laboratory. I've got multi-million dollar test equipment all around me. Perhaps I can do a test . . .

(Suggest some parameters, what you'ld like to see.)

 

[Kent S.]

Re: Dimarzio Parts suck

Absolutely! And thats exactly what the GuitarNuts site was talking about - the difference between high-voltage, high-current applications, and the low-voltage, low-current guitar signal.



You know . . . I work in Navy electronic calibration laboratory. I've got multi-million dollar test equipment all around me. Perhaps I can do a test . . .

(Suggest some parameters, what you'ld like to see.)

First a DC baseline test of measure the resistance of a 500k pot CW~CCW with a DMM with at least a 10 Meg input Z, then run a 1Vrms DC voltage (I mean reading the voltage with a true rms sensing meter) across it, check the resulting dc voltage (rms) with a meter with at least 10meg input Z. Correlate to see if the voltage obtained is consistant with what it should be according to whatever the measured DCR of the pot and the internal source resistance of the signal generator or voltage supply. Then put a 1V rms sine wave @100HZ. across the CW~CCW terminals,measure voltage;then apply 1Vrms sine wave @ 1kHz. measure voltage;then apply 1Vrms @ 10kHz. sine wave, measure voltage ... finally correlate the results to see. You can also run inductance sweeps, but you won'r find much ... a pot's normal capacitance in series is around 40pF I believe, capacitance also becomes and issue in that not only do pots load from R/Z but from bleeding highs to ground via their capacitance. The DCR/Z thing will be fine though.

 

[Artie]

Re: Dimarzio Parts suck

First a DC baseline test of measure the resistance of a 500k pot CW~CCW with a DMM with at least a 10 Meg input Z, then run a 1Vrms DC voltage (I mean reading the voltage with a true rms sensing meter) across it, check the resulting dc voltage (rms) with a meter with at least 10meg input Z. Correlate to see if the voltage obtained is consistant with what it should be according to whatever the measured DCR of the pot and the internal source resistance of the signal generator or voltage supply. Then put a 1V rms sine wave @100HZ. across the CW~CCW terminals,measure voltage;then apply 1Vrms sine wave @ 1kHz. measure voltage;then apply 1Vrms @ 10kHz. sine wave, measure voltage ... finally correlate the results to see. You can also run inductance sweeps, but you won'r find much ... a pot's normal capacitance in series is around 40pF I believe, capacitance also becomes and issue in that not only do pots load from R/Z but from bleeding highs to ground via their capacitance. The DCR/Z thing will be fine though.

Ah-ha . . . you're the one that writes them dad-gum tech manuals we have to follow. :laugh2:

Seriously though, that'll be a piece of cake. I just have to wait 'til next week - when the "inspectors" aren't here. I have a nice range of CTS, DiMarzio, ALPS, Bournes, and a couple others to test.

I'll post results as soon as possible.

 

[Farkus]

Re: Dimarzio Parts suck

Seriously though, that'll be a piece of cake. I just have to wait 'til next week - when the "inspectors" aren't here. I have a nice range of CTS, DiMarzio, ALPS, Bournes, and a couple others to test.

I'll post results as soon as possible.

This I gotta see! :laugh2:

Farkus

 

[Benjy_26]

Re: Dimarzio Parts suck

Ah-ha . . . you're the one that writes them dad-gum tech manuals we have to follow. :laugh2:

Seriously though, that'll be a piece of cake. I just have to wait 'til next week - when the "inspectors" aren't here. I have a nice range of CTS, DiMarzio, ALPS, Bournes, and a couple others to test.

I'll post results as soon as possible.

Finally, my tax dollars doing something worthwhile! :laugh2:

 

[Kent S.]

Re: Dimarzio Parts suck

Ah-ha . . . you're the one that writes them dad-gum tech manuals we have to follow. :laugh2:

Seriously though, that'll be a piece of cake. I just have to wait 'til next week - when the "inspectors" aren't here. I have a nice range of CTS, DiMarzio, ALPS, Bournes, and a couple others to test.

I'll post results as soon as possible.

Cool! Please note also if the pots are stand alone pots or push/pull pots, I like alps (BOSS uses their stuff a lot), got any clarostats you could throw in the mix for the fun of it too ... :laugh2: If you got any of those cheap ROC pots that would be cool also.