Nagra BPS with low impedance pickup?

uber2 · Apr 22, 2019

Hi,
Im trying to set up some for me new gear consisting of:

Feickert Woodpecker
Brinkmann 12.1
Transfiguration Proteus.
Nagra BPS loaded with 100ohm.

I have calibrated with the feickert protractor. And with my loupe it all looks good.
But I have a certain amount of sibilance generally.
Could it be the Nagra built in sut that does not like the low impedance (1ohm) of the proteus?

Thanks for any thoughts.

Solypsa · Apr 22, 2019

Perhaps sra/vta needs further work?

Audiophile Bill · Apr 22, 2019

Agree with Solypsa it is worth really locking down your VTA.

Are you sure you inserted the little chip thing correctly in your BPS to load it?

uber2 · Apr 23, 2019

Thanks for the replies.
I will pull out the usb microscope and measure VTA.

The loading Pcb sits correctly as it seems.

Can I assume you both consider the SUT on bps fine with 1ohm load on primary?

Audiophile Bill said:
Agree with Solypsa it is worth really locking down your VTA.

Are you sure you inserted the little chip thing correctly in your BPS to load it?

Audiophile Bill · Apr 23, 2019

uber2 said:
Thanks for the replies.
I will pull out the usb microscope and measure VTA.

The loading Pcb sits correctly as it seems.

Can I assume you both consider the SUT on bps fine with 1ohm load on primary?

I didn’t try such a low internal impedance cart all those years ago when I had a BPS so I can’t answer your question properly I am afraid.

Solypsa · Apr 23, 2019

Once you have vta measured and set, then it *may* yield benefit to further adjust by ear. Or not. But you wont know if you don't try it

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Nagra BPS with low impedance pickup?

uber2

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Solypsa

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Audiophile Bill

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uber2

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Audiophile Bill

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