The unit is being serviced, and all the contact and switched has been cleaned with no issue. Brand New Russia Tubes on Power Supply. 5 RCA, 1 DYNACO on signal path, all original. Due to the age of the amp. No return is accepted.
DYNACO STEREO70 vacuum tube power amplifier. Can be used with 100V, but sound quality will be inferior. We recommend using 117V. Size: Width 330mm x Depth 240mm x Height 165mm. We accept return items up to 60 days after the item has arrived. International Buyers – Please Note.
Vintage Dynaco Mark II Tube Amplifier Transformer P782. All Sales Are Final. PLEASE NOTE ALL FAULTS SHOWN IN PICTURES ARE CONSIDERED PART OF THE DESCRIPTION. ALL ITEMS ARE EXPERTLY PACKED TO ARRIVE IN GOOD ORDER. The items we sell are vintage items. We will tell you if an item has been tested, to what degree it has been tested and what functions work or don’t work. We can work with just about any schedule. If you need additional time, please let us know. Please inquire for more info.
FOUND THIS AT AN ESTATE. SHOWS COSMETIC WEAR FROM AGE WITH SCRATCHES, SCUFFS, DUSTY INSIDE FROM YEARS OF STORAGE. WILL NEED CLEANED UP. PRE AMP ONLY AS SHOWN. PLEASE ASK IF YOU HAVE ANY QUESTIONS THANK YOU!
PLEASE REVIEW PICTURES ONE, THREE, FOUR AND FOURTEEN FOR SOME EXCELLENT INFORMATION SUPPORTING THIS RARE AMPLIFIER’S PROMOTION DURING THE INTRODUCTION OF THE 7591 OUTPUT TUBE. Item is from a smoke free home. Please see all pictures as they are an integral part of this description. Please utilize ZOOM for any extra assistance viewing pictures. Item is in excellent overall condition considering it’s age and item does show some wear/age. Please review all clear pictures and video as they are an important part of this description. Item is free from any large amounts of loose particles inside/outside it’s original metal chassis. Item also looks to be free from any major damage, non original drilled holes, etc. Please also note this unit does power on. (works) Item was briefly tested with a variac as pictures four and six demonstrate. (works) This stereo tube amplifier was always briefly tested with a pair of period Acoustic Research and an early, mono Blue Note pressing as demonstrated. (works) No further testing was completed with this tube amplifier, nothing rigorous. The original ELECTRONICS WORLD magazine is dated 1961, complete and included as shown. All tubes are not included with this listing; only the quad 7591 type stereo amplifier and it’s matching literature/provenance. Please see pictures six and seven for more details concerning the dated 1961 ELECTRONICS WORLD magazine which features THIS 7591 type AMPLIFIER on it’s cover; the piece of paper with repair, update, restorations, specs, etc. Is included as shown and found. There are no dates on the restoration paperwork, please make a note of this as this is a vintage tube power amplifier from the late fifties/early sixties. Considering the rarity of this vintage stereo tube amplifier, it is certain that there are not many period correct “survivors” out there. Item will make a great addition to any vintage audio assortment, collection, etc. As with all vintage electronics, a qualified person and/or technician should go through this item before continuous use. Original Westinghouse/Dynaco type quad 7591 type power tube stereo amplifier. Item(s) is not stated as brand new & sealed in condition. Please see and read (if at all possible) all pictures and utilize ZOOM for more details. Please feel free to ask questions if needed. Thank you for your interest and time. ITEM WILL BE PACKAGED CAREFULLY WITH TIME AND EFFORT FOR SECURE TRANSIT.
Being an electronics tech, I see voltages that are way too high for the designed circuit. Nice looking bucking transformer with stainless cover! Turns device and your equipment on or off. You have a choice of 3% or 7% voltage drop. All vintage tube equipment should be using this voltage reducer. Read on; After WWll and up until 1968, household voltages were 117 volts. Typically voltages these days range from 120-125. Your vintage audio equipment was designed to operate around lower voltages of years ago. You might ask yourself what is a few extra volts? Take into account that the power supply in your vintage device is multiplying those few extra volts many times so that the end result could be 20-30-40 volts more than the circuit was designed for. This could lead to transformer failure, component failure and shorter tube life. As you can see in the photo, the voltage reducer brought the line voltage down from 124 to 116. This is approximately a 7% drop. Simply plug your vintage electronics into the reducer outlet. Will work with equipment drawing up to a total of 4 amps. Has protective 4 amp fusing. Metal box is grounded through heavy duty 3 wire power cord. As an example; Photo shows voltage of Dynaco ST-70 at 467v on todays line voltage and then 438v plugged into the voltage reducer. The correct voltage for this Dynaco amp calls for 435v at this point. Also your filament voltage will be more in line with what it should be. All other voltages are much closer to Dynaco factory specifications with the reducer. Your device will run cooler and safer, extending component, transformer and tube life! Please state voltage drop preference when ordering. Strongly recommended for Dynaco St 70, since they were produced with power transformers designed to operate with 117 line voltage. Your transformer will run cooler, tubes will last longer and all voltages will be closer to where they should be!
This is a vintage Dynaco Mark IV tube amplifier by Dynakit. It was manufactured in the United States and is a rare find. The amplifier has been tested and powers on. Dynakit Dynaco Mark IV Amp vintage rare amplifier. Size is 14x5x6.5. Tested and powers on.
FOUND THIS AT AN ESTATE. SHOWS COSMETIC WEAR FROM AGE WITH SCRATCHES, SCUFFS, DUSTY INSIDE FROM YEARS OF STORAGE. WILL NEED CLEANED UP. PRE AMP ONLY AS SHOWN. PLEASE ASK IF YOU HAVE ANY QUESTIONS THANK YOU!
