A431 Mk3 MkIII Output Transformer for Dynaco Dynakit Start Price USD 119.95 Current Price USD 119.95 Time Left - Bid Count 0 Buy It Now Price - Reserve Price - Start Time Wednesday, November 19, 2008 End Time Friday, December 19, 2008 Location Chicago, IL See more about 'A431 Mk3 MkIII Output Transformer for Dynaco Dynakit ' Description NEW A431-S, a reproduction of the Dynaco A431 output transformer as used on the Dynaco (tm) MkII and MkIII amplifiers and Sunn guitar/bass amplifiers. The primary is wound the same as the original A431, same number of turns, sections and wire size, using the same patented Dynaco winding method, and made on the same core size and material. Only improved insulation material used (thus making the transformer more resistant to abuse) and nice long (10 inch/ 25 cm minimum) teflon insulated leads have been added. This transformer has what you'd expect out of a Dynaco transformer, like healthy low frequency inductance, high resistance to distortion caused by output tube imbalance, and low distortion overall. They're great for both hifi and guitar amplifier DIY projects (such as the Eiclone project at www.diytube.com ) as well as replacements for Dynacos and Sunns. Brand New Production. Made right here in in Chicago,USA,  By a factory thats been making then since the 1950's. We are factory direct dealers and pass the savings on to you. Wholesale prices, at single piece quantities... This type of transformer can be used with many tube types, such as 6550, KT88, KT90, 6CA7/EL34, 300B, 2A3, 6B4 or push-pull parallel 6BQ5/EL84 & 6V6-GT. It may be used with triode, pentode, or ultralinear (screen tap connection) wired tube arrangements. Transformer specs are: 4300 ohms CT primary with screen taps, 4,8 and 16 ohm secondary. 20 Hz to 20 KHz response at 60W, within 1 db, 30 Hz to 15 KHz at 120 watts. Max DC per side (suggested) 120 ma. Exact same dimensions as the original A431 Dynaco transformer: Height 4 3/4 inches (120 mm) Width 4 inches (101 mm), Depth over covers 4 1/2 inches (114 mm), mounting centers are 3 inches (75 mm) by 3 1/2 inches (88 mm).Transformer carries manufacturer's 6 month exchange warranty on materials & workmanship Approximate shipping weight: 12 lbs from zip 60634. Illinois Residents must pay sales tax. Buyer must respond within 3 days of auction ending. Transactions not completed in 14 days will be resold. Shipping for customers in the USA is available through UPS or USPS, UPS ground is the standard method. Overseas customers can choose between UPS and USPS International Priority Mail. We will only ship via insured methods of delivery, this means no USPS International First Class Mail. Buyer is responsible the cost of insuring the package. We will do our best to describe the items correctly but due to the wide range of items we list it is possible we may not always get it right so please ask any questions before you bid. Once you bid you agree to all terms of the auction. Vintage gear is sold as-is unless otherwise specified, this means no returns or refunds on vintage items! All new production tubes come with a 1 month warranty and against manufacturing defects and new production transformers have a 6 month warranty against manufacturing defects. You must return the defective tubes or transformers to us for inspection before you will receive a replacement or refund, buyer is responsible for any shipping costs associated with the returning the item to us. Please check our other auctions for more tubes, electronics and ham radio goodies. For Tubes and Parts - Check Us Out! Triode Electronics 5633 W. Irving Park Rd. Chicago, IL 60634 Thanks for Looking... Ph 773-871-7459 fax 773-327-5652 After purchasing, pay instantly with your credit card through PayPal!   On Sep-08-08 at 08:37:21 PDT, seller added the following information: Sellers: Get your own map today. Click here now. Simple." Place a Bid!