3CX800A7

Easy DENTRON MLA–2500 Conversion using SVETLANA 3CX400A7 3CX800A7 www.DataSheet4U.com Complement to Svetlana technote #44 Provided by sm2yer www.DataSheet4U.com Fig 1 Complement to Svetlana technote #44 Provided by sm2yer www.DataSheet4U.com Photo A. Photo B. Complement to Svetlana technote #44 Provided by sm2yer www.DataSheet4U.com Fig 2. Fig 3. Complement to Svetlana technote #44 Provided by sm2yer Technical Bulletin 44 Sida 1 av 6 No.44 Amateur Radio 3CX400A7 & 3CX800A7 www.DataSheet4U.com The Easy MLA-2500 Conversion By: B-N. Bob Alper The MLA-2500 power amplifiers that are available for purchase have become scarce since the articles for conversion to more popular tubes appeared in QST and Communications Quarterly. Also, the 8875 tubes are in demand less and less because, except for amateur use, there is little industrial/commercial use for the tube. As the demand decreases, we can expect the price of a new 8875 to climb further from its present level, which is near $450. The MLA-2500 series is one of the most compact linear amplifiers of its power class. Its intermod performance at 1250 watts RF output, with 100 watts of drive to 8875 tubes, as measured by the ARRL (3rd and 5th order distortion products of 35 and 37 dB, respectively) is relatively good by the standards of modern amplifier designs . Therefore, it seems reasonable for MLA-2500 owners to try to find an alternate more economical and available replacement power tube. REPLACEMENT TUBE SOLU...