{"product_id":"russian-6h30pi","title":"Sovtek 6H30Pi","description":"\u003ch1\u003eSovtek 6H30Pi\u003c\/h1\u003e\n\u003cp\u003eThere are two types of 6H30 tubes currently being produced. The Sovtek brand which have the chrome pins (listed here), and the Electro Harmonix Gold pin. They are the same tube from the same factory. Don’t get your panties in a bunch over which is better, as the gold plating is laid over the chrome plating. They are both terrific. What is most important is how they test.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eYou guys already know that Upscale Audio is the only place that the Audio Research factory people give a thumbs up to\u003c\/strong\u003e. That’s because we actually have our power tubes matched properly and have the highest Gm, and that \u003cstrong\u003eevery small signal tube like the 6H30 is not just measured, but listened to in a special phono stage test circuit by using headphones.\u003c\/strong\u003e That, my friends, is the only way to get the blackest blacks in your system.\u003c\/p\u003e\n\u003cp\u003eWe deal with some fairly picky customers that want to make sure that their expensive ARC preamps, phono stages, and amps are as close to perfection as possible. For that customer we have 6H30’s in a grade called “ARC Select”.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eThis grade has four distinguishing characteristics:\u003c\/strong\u003e\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003eThe transconductance measurements will be as high as possible, resulting in a tube with the longest life.\u003c\/li\u003e\n\u003cli\u003eInternal balance between the two triodes of the tube will be as tight as possible, within 15% (triode balance on a 6H30 can easily vary by 50%)\u003c\/li\u003e\n\u003cli\u003eThe microphony will be the absolute lowest possible, tested in a moving coil phonostage test circuit with 60dB of gain.\u003c\/li\u003e\n\u003cli\u003eThe noise will be the absolute lowest possible while being pushed in the same moving coil phonstage test circuit.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003e\u003cem\u003e\u003cstrong\u003ePlatinum grade will be a fine tube for most people.\u003c\/strong\u003e\u003c\/em\u003e If you want to assure everything in your system is PERFECT, then use ARC Select. Remember that the tubes are the actual amplifying device you are listening to. They are everything. More than those cables you bought, or that power conditioner. That’s why Upscale Audio is the place that ARC owner’s go. Nobody does what we do.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003ePlease note: There are a finite number of ARC Select grade available.\u003c\/b\u003e If the website does not let you place your order, call us at 909-931-9686 and we can put you on a waiting list.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePlatinum grade -\u003c\/strong\u003e The best of the best. Lowest noise and microphony with the tightest triode balance we have available. This is typically 10% or tighter, but may be higher depending on available stock.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eGold grade -\u003c\/strong\u003e Low noise and microphonics with a triode balance typically between 15% and 20%, but may be higher depending on available stock.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eThis tube is not a replacement for 6922 or any other tube type.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003ca href=\"\/grading-and-matching-small-signal-tubes\" rel=\"noopener noreferrer\" target=\"_blank\"\u003e\u003cstrong\u003eClick here for a more in depth discussion on how we grade tubes.\u003c\/strong\u003e\u003c\/a\u003e \u003c\/strong\u003eLabel quality may vary from picture above. Prices includes matching in any quantity you need at \u003cstrong\u003eno extra charge.\u003c\/strong\u003e\u003c\/p\u003e","brand":"Sovtek","offers":[{"title":"Gold Grade \/ No Cryo","offer_id":21829851397,"sku":"SOV 6H30 G","price":53.95,"currency_code":"USD","in_stock":true},{"title":"Gold Grade \/ Yes Cryo","offer_id":21829851333,"sku":"SOV 6H30 G C","price":61.95,"currency_code":"USD","in_stock":true},{"title":"Platinum Grade \/ No Cryo","offer_id":21829851525,"sku":"SOV 6H30 P","price":63.95,"currency_code":"USD","in_stock":true},{"title":"Platinum Grade \/ Yes Cryo","offer_id":21829851461,"sku":"SOV 6H30 P C","price":71.95,"currency_code":"USD","in_stock":true},{"title":"ARC Select \/ No Cryo","offer_id":21829851653,"sku":"SOV 6H30 ARS","price":83.95,"currency_code":"USD","in_stock":true},{"title":"ARC Select \/ Yes Cryo","offer_id":21829851589,"sku":"SOV 6H30 ARS C","price":101.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1564\/1247\/products\/bef5a94dc8715908fa356e14732092c1.jpg?v=1741632707","url":"https:\/\/upscaleaudio.pro\/products\/russian-6h30pi","provider":"Upscale Audio","version":"1.0","type":"link"}