Dynaco stereo 70 upgrades for iphone

Vi mono power amplifier of 1976, which produced 120 watts continuous. New listingjust restored upgraded dynaco st70 stereo tube amplifier factory assembled. Either option is customizable by the upgrading of specific components such as the tubes that are used. These also provide much better contact for the speaker wires.

Our offerings have the most requested upgrades we sell, built right in. For the kit to operate correctly, your st 70 amps power transformer must have a stack height of at least 1 34 44. Restoration module this is an exact replacement for the original dynaco pc3 board fabricated from milspec materials. This is a kit for the driver circuit only and does not include the st 70 power amp. Everything driver, bias supply, quad cap, filters is included. My uncle had the stereo 120, pat4 preamp, fm3 tuner, and a25 loudspeakers. The amp produces some hum, when connected to my laptop or iphone. One of the most frequent failures in the dynaco st 70 is the original quad electrolytic capacitor. The companys final contribution to vacuum tube technology was the massive mk. You also requested a simple and reliable power supply module. Dynaco st70 series 3 advanced classic tube aplifier. I will consider upgrading in future, but for now i would like to fix this ground. Dont get me wrong, the mcintosh 240 is a wonderful amp with a superior build quality and measures better than the dynaco at the frequency extremes. Dynaco is best remembered for its highly regarded vacuum tube stereo amplifier, the stereo 70 st 70.

We also offer an array of new select dynakit classic vacuum tube amplifier kits based on the original. Dynaco continued to build both mono and stereo amplifiers until 1977. Even today, upgraded components, rebuilding kits, and complete tube amplifiers using the basic stereo 70 design are still in production, and the. Well known as the bestselling tube amp of all time, the iconic dynaco stereo 70 amplifier has been revamped and redesigned in a series 3 model in the relaunched hafler dynaco line, now under the auspices of radial engineering ltd. Why start with an amp you have to mod, when ours comes fully loaded. Dynaco stereo 70 upgrade style punched chassis made in usa. Our st70 kit is one of the best stereo tube amps of all time.

Many of you have requested that we develop modules to upgrade the existing dynaco design as opposed to our complete modification package. The st 70 used four el34 output tubes, one gz345ar4 rectifier tube, two 7199 input driver. Over the years, we have received may requests asking for service and upgrade help with the longoutofproduction dynaco st70 vacuum tube power amplifier. They sounded great, to my amazement though, my dynaco stereo 70 produced a deeper soundstage and had a bit more midrange clarity. The dynaco st 70 series 3 tube amplifier is a modern version of the most popular stereo tube amplifier of all time upgraded for todays hifi enthusiast. In addition, we offer an array of new select dynakit classic vacuum tube. Recreating and improving upon a true classic was a lot more work than any of us expected. The dynaco st70 series 3 tube amplifier is now finally. Many of you have requested that we develop modules to upgrade the existing dynaco design. Pa060s power transformer nearly twice the lamination stack size of the original, a470s output transformers, c354 choke. They also manufactured other tube and solid state amplifiers, preamplifiers, radio tuners and. This board is a must for any serious restoration of the dynaco stereo 70 to full stock condition.

Find the right dynaco parts to restore, repair or upgrade your original dynaco vacuum tube amplifier. Introduced in 1959, the st 70 was available as a kit dynakit intended for assembly by the purchaser or as a complete factorywired unit dynaco. Of course you must have an existing old dynaco st 70 power amp. Here at dynakit you will find the right parts to restore, repair or upgrade your original dynaco vacuum tube amplifier. Dynaco st70 rebuild makes hum when plugged to input, not with. First is our stereo70 upgrade system on board sob a complete amplifier on pc board. Including our custom made transformers, which are made to original specs right here in the usa. Stereo 70 owners manual full stereo 70 repair guide. This year and a half journey proved to be challenging and. We like to think of the st70 series 3 as the update that david hafler would have made if he were alive today. I have finished rebuilding an old dynaco st70 with new new capacitors.