OUTPUT TRANSFORMER DYNACO ST-70 4300 CT / 4 - 8 - 16 ohm Replica NEW
NEW A470-S, a reproduction of the Dynaco A470 output transformer as used on the Dynaco (tm) ST70 and MkIV amplifiers.
The primary is wound the same as the original A470, 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) high temperature 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 as well as replacements for Dynacos.
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.
Brand new production, MADE IN ITALY.
Transformer specs are:
Primary impedance: 4300 ohms CT primary with screen taps
Secondary impedance: 4, 8, 16 ohm
Frequency response: 20 Hz to 20 KHz response at 35W, within 1 db, 30 to 15 KHz at 70 watts.
Current: Max DC per side (suggested) 80 ma.
Dimensions: Exact same dimensions as the original A470 Dynaco transformer: Height 3 1/2 inches (88 mm) Width 3 inches (75 mm), depth over covers 4 inches (101 mm), mounting centers are 2 5/16 inches (59 mm) by 2 7/8 inches (72.5 mm).
