Push - Pull Audiophile - Potted Output (1650 "P" Series) C Tube Audio PUSH - PULL "CLASSIC" TUBE TYPE - ULTRA-LINEAR POTTED OUTPUT TRANSFORMERS .5 .25 6 • Designed for push-pull tube output circuits. • Enclosed in a drawn steel case, the transformer is completely potted in epoxy and painted in black powder paint to match our potted power transformers & potted chokes. • Frequency response 30 Hz. to 30 Khz. at full rated power (+/- 1 db max. ref. 1 Khz) minimum. • Lead connection is via 10 bottom mounted lugs. • All units include 40% screen taps for Ultra-Linear operation (if desired). • Typical applications - Push-Pull: triode, Ultra-Linear pentode, and tetrode connected audio output. Part No. 1650KP 1650PP 1650RP Audio Watts 50 60 100 Primary Impedance 3,400 C.T. 6,600 C.T. 5,000 C.T. Max DC Per Side 318 ma. 200 ma. 317 ma. Secondary Impedance 4/8/16 4/8/16 4/8/16 A 3.31 3.31 4.25 Plate B+ 10 8 Ohm 9 4 Ohm 8 0 Ohm 7 4 Ohm 4 Screen 5 Plate 1 B 3.88 3.88 5.00 6 2 3 4 E F B 5 Dimensions (Inches) C D E F 4.25 2.50 3.00 3.31 4.25 2.50 3.00 3.31 4.50 3.38 4.25 4.50 0 Ohm Audio Watts Primary Impedance 1650KP 50 3,400 C.T. 1650PP 60 6,600 C.T. 1650RP 100 5,000 C.T. G 2.56 2.56 3.75 Wt. Lbs. 9 10 13 Tube Types 6L6GC, 807, 5881, EL34, 6146B, 6550B 6L6GC, 807, 5881, EL34, 6146B, 6550B, KT88 807, 5881, EL34, 6146B, 6550B, KT88 Note: The above examples of possible combinations are to help you narrow down the choices of transformers for your favorite tube types. How you operate the tubes (push-pull, push-pull parallel, ultra-linear, class, B+, bias, operating points, etc.) will change optimum plate to plate load impedance. Only a few of the most popular tubes are shown. As more tubes become available we will add them to the list. A tube manual or tube manufacturer's technical data sheets should be consulted first, before making a decision on a proper output transformer. EUROPE Guelph, Ontario (519) 822-2960 St. Laurent, Quebec (514) 343-9010 www.hammondmfg.com Cheektowaga, NY (716) 630-7030 94 USA 9 8 10 Part No. CANADA © .5 Suggested Tube Types 2 Screen 3 4 Mounting Holes .25 - 20 X .5" Deep G Schematic 1 7 A D Basingstoke, UK 01256 812812 AUSTRALIA Queenstown, Australia 61-8-8240-2244