Heathkit Mono Tube Amplifier AC 7 Push Pull Ultralinear- Just Rebuilt New Output

  

The shop cleaning goes on. I will accept reasonable offers for some stuff, but if you low ball me I will just ignore you. Most is listed at least double what it is actually worth and most of them that say "working" but nothing has been done to them are just a bomb waiting to explode. If it meets the description it is what it is. This is a very cute Heathkit A 7 mono integrated Ultralinear amplifier.

I had a number of these and kept the best one to restore, finally got a couple hours and went through it. As with all old tube gear the power supply can was shot. Once that was replaced it passed signal but was awful sounding. Replaced a few coupling caps and resistors(one that was suppose to be 150K had drifted to 540K) All controls and contact were cleaned and an internal fuse and new line cord installed. I had good used 12SN7, 12SL7, and a decent 12SQ7 and a very good 5Y3 with a broken alignment pin.

I bought a pair of 12A6 NOS RCA output tubes (VT134) very closely matched. It has been running on my bench for a couple days and sounds nice. All controls work as designed. The chassis is in VG shape with a few chips in the gray hammered finish.

The face plate is also very good with some chips on the left corner. Knobs are all very nice. The only issue with this was that someone hogged out the phono input jack and had installed a DIN connector. I put an original style jack in it, but you can see I had to use some washers to secure it to the chassis. This is basically serviced, if you want a complete restoration you will should replace the rest of the coupling caps.

(although it does meet factory specs now)The remaining resistors are all within tolerance. This is because when these ere designed the AC voltages in houses as 110 volts. Schematic of amp will be enclosed. I do sell and will make custom bucking transformer voltage reducers to keep you gear from getting over heated, and to save tubes and transformers. It will be double boxed and tubes packed in bubble wrap.

I have been an electronic hobbyist for over 45 years. Most of my tubes come from test equipment that has been disassembled and parted out. I write articles, for AudioXpress concerning restoration, repair and maintenance of vintage audio equipment and radios. I build custom audio amplifiers and speakers for customers, as well as for pleasure.

My interest is in preserving and promoting the use of many vintage items. I offer a restoration service for select audio brands including Heahtkit, Dynaco and McIntosh tube amplifiers. I also collect and restore Bulova Accutron watches from the 60s and 70s and Zenith TransOceanic Radios from the 50s and 60s.

You can also check out the about me section by my screen name. Once you are invoiced, please pay within 3 days. I want your item to reach you in great shape. Packing delicate items for survival is an art; it is time consuming and expensive. I also double box any item that has tubes or glass, or is particularly fragile.

Proof of careful packing also facilitates any damage claims. I leave feedback when you pay for your item. When you receive the item, please unpack it right away, and carefully inspect for damage and function. If the item is damaged, it is VERY IMPORTANT you keep ALL the packing materials and boxes until the shipper has inspected them.

YOU will need to file a claim with the shipper. In addition, please contact me, since we will need to work together to resolve the claim. The item "Heathkit Mono Tube Amplifier AC 7 Push Pull Ultralinear- Just Rebuilt New Output" is in sale since Thursday, November 26, 2020. This item is in the category "Consumer Electronics\Vintage Electronics\Vintage Audio & Video\Vintage Amplifiers & Tube Amps".

The seller is "tuninfork" and is located in Garretson, South Dakota. This item can be shipped to United States.

• Type: Integrated Amplifier
• Brand: Heathkit