Phono2 mods
Posted: Sun Sep 09, 2018 1:52 pm
I have listed two P2 heads in classified due to mods and Andy asked if they can be retro fitted and I said no.
So explanation. The inside of the case is being lined with a layer of self adhesive copper foil not connected to the earth side of the amp so acting as a Faraday Cage. This can never get rid of all RF or hum breakthrough but it helps especially with moving coil. I was concerned it would also stop internal field getting out so spoiling the music, but this is not the case as it seems to help stop RF and mobile phone signals especially not the frequencies of the music.
So as you can see to mod existing units the case would have to be stripped, so not an option and really not worth the hassle or expense. To begin with it was only going to be MC units that were done, but I have been thinking today that these units are often sent back for change from MM to MC so better to do all of them, and as sometimes P1 gets ordered for MC it means logically to do it for all P cases 1, 2, and 3, so there will be a P1 and a P3 listed in classifieds as well.
So explanation. The inside of the case is being lined with a layer of self adhesive copper foil not connected to the earth side of the amp so acting as a Faraday Cage. This can never get rid of all RF or hum breakthrough but it helps especially with moving coil. I was concerned it would also stop internal field getting out so spoiling the music, but this is not the case as it seems to help stop RF and mobile phone signals especially not the frequencies of the music.
So as you can see to mod existing units the case would have to be stripped, so not an option and really not worth the hassle or expense. To begin with it was only going to be MC units that were done, but I have been thinking today that these units are often sent back for change from MM to MC so better to do all of them, and as sometimes P1 gets ordered for MC it means logically to do it for all P cases 1, 2, and 3, so there will be a P1 and a P3 listed in classifieds as well.