For sale is a NEW PLATINUM Matched Quad (4) Electro-Harmonix 6H30Pi tubes Gold Pins. Are perfectly matched on transconductance for all plates and between tubes. Welcome to Tube Maze Store. Here you will find a wide selection of NOS and reissue tubes. All tubes are also tested for noise and microphonics.The item "PLATINUM Matched Quad (4) Electro-Harmonix 6H30Pi tubes Gold Pins" is in sale since Monday, December 7, 2020. This item is in the category "Consumer Electronics\Vintage Electronics\Vintage Audio & Video\Vintage Parts & Accessories\Vintage Tubes & Tube Sockets". The seller is "tubemazestore" and is located in Melrose, Florida. This item can be shipped worldwide.