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H.O. MC: Ortofon MC-3

Re: HO MC: Ortofon MC-3

Postby DaveyW » Mon Jun 12, 2017 12:29 pm

Hi B50

500pF seemed a little high to me, so just had a look at the Ortofon Spec Sheet

It quotes: "Recommended load impedance - 47 kOhm / <500 pF"

This implies that 500 pF is the maximum recommended capacitance?

Might be worth using the SE-II's options to explore some lower values until you find the B50 Sweet Spot :thumb
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Re: HO MC: Ortofon MC-3

Postby bauzace50 » Mon Jun 12, 2017 12:31 pm

Yes! Matter of fact, I started that already. Need to listen now.

Delay auditions until Wednesday:

Today: picking up the passenger at airport.
Tuesday: Foot Doctor in San Juan.
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Re: HO MC: Ortofon MC-3

Postby bauzace50 » Wed Jun 14, 2017 3:46 pm

Oops!
I had better see the Witch Doctor now.
Further audition of the MC-3 reveals intolerable treble distortion on a well-known record. (I MAY have actually damaged something during a slip of the hand, BUT everything LOOKS normal).

A quick cartridge swap for my Stanton 500 With Paratrace Tip shows No distortion on the same record.

The seller responded with a Return Authorization, to my request for substituting the same model.

To be continued whenever the substitute sample arrives.
Wvrsdzlxykt.
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Re: HO MC: Ortofon MC-3

Postby DaveyW » Wed Jun 14, 2017 7:09 pm

Just as things were shaping up nicely too :?

Hopefully no.2 will work out better
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Re: H.O. MC: Ortofon MC-3

Postby bauzace50 » Wed Jun 21, 2017 11:40 am

Good News!

The seller (LP GEAR, Las Vegas, NV) shipped the substitute cartridge the Same Day the objected cartridge was delivered by US Postal Service.

Verified through Both USPS reports (Delivery, and Acceptance).

New Delivery date is Friday 23 JUN 17.

This episode may be teaching me something useful:

A- Minding Instructions: regarding capacitive loading, and Maximum Tracking Ability.

The MC-3 is rated up to 70 microns tracking, which is ample but not "Super Tracking".

I "force fed" the 100 micron band. Probably a mistake. This, plus a slip of the hand, MAY have affected the tracking ability of the treble range. Pure speculation.

B- Minding a "settling-in" period. This model may be the very first I have detected with this need in 60 years!

C- Avoid a slip of the hand. Use the cue lever on the tonearm.

This would be the reverse of the recommended process Blue Angel specified for the Mantis cartridge. He instructed the user to track the highest velocity bands immediately!

"Tiptoeing through the tulips" instead of "bull in a china shoppe" this time around.

To Be Continued upon receipt of #2 MC-3 cartridge.
b50

P.S.- another lesson might be that #1 MC-3 was an "off" sample. Quite improbable, from what I've experienced in the past.
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