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In the Forum: Audio Discussions
In the Thread: It’s mad, mad, mad... electricity.
Post Subject: PP and Phono - Help neededPosted by N-set on: 11/6/2020
I finally got a PP unit. It is 1500W model as this is enough for now. It is the actual Golden version (Plus not available anymore) but the PP factory claims it's identical electrically just in a new aluminium case and some extras added. I managed to find it EU in Czech Republic via the PP official distributor there: http://www.hifistore.cz/ The guys in Prague said eventual servicing is done by them in CZ so no shipping there and back to CA needed. V nice people to deal with actually (Disclaimer: just a happy customer, no business or other affiliation).

After connecting to the system digital, amplification and even the Sansui TU-X1 work like a charm! However I get a very strong brumming sound (sometimes periodic brum-brum-brum-bruuuuuummmmm) with the phono. With one cartridge (Decca, connected directly to phono) the sound is very very loud, with the other, SPU (connected via SUT, floating primaries) less but still unlistenable. The noise is somewhat lower in volume and changes the character to less brumming type when the PP is on batteries, but still loud. The phono is DIY Romy ER834. The PP unit is on the equipment rack, with the distance to the cartridges around 110cm and to the signal part of the phono around 140cm. (The tuner is half that distance and is dead silent). There should be no ground loops - the phono is the only grounding point, grounded to the PP, the ampl is with the ground lifted. The PP is grounded to the wall, the TT with its metal frame floating and connected of course not to PP but to the wall.
Any ideas where to look for a remedy?
Thanks,

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