Vintage Tube Amp

Thank you for visiting my page! This is a single OPT with a primary side of 7K? , ideal for ST tubes such as 42 and GT tubes such as 6F6. Regarding accessories, you will only receive the products shown in the photo. Please see photos and video if available. We will pack the product securely and deliver it safely. International Buyers – Please Note. We do not mark merchandise values below value or mark items as “gifts” Because declared value is insured value. Besides US and Int. Ernational government regulations prohibit such behavior. Japanese mechanical products use 100 volts. A transformer is required if it does not match your country’s voltage. Do your own research and prepare a suitable transformer. We try to describe any items to the best ability and offer you the best values and an good quality. We specialize in Japanese tradition products, so please look at our other items and enjoy feeling Japanese culture! Maybe we can find it for you.

This came in from a ham radio estate, have no clue what this does or is for. Use zoom, I did not plug in, I would think you want to bring this up on a variac… Not sure if amp or power supply or? So untested, as found, no bottom panel. Please see all pictures and use zoom feature. Often the pictures describe the item better than words. Also please see the 11,000+ vintage radio related parts and other great antiques and oddities I listed. Old Radio’s are Fun and getting harder to find! Just like radio parts? Thank you for you order and please follow my store. ! New items added daily. Also you can go into my store and pick the category for easy shopping. Best to you and Many Thanks, Mike.

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!

Untested but excellent condition transformer. I do not claim to know how this transformer should be utilized in your particular circuit – pics are of the actual transformer you will receive – specs for the transformer are in the pictures. If you have any questions or I can help in any way don’t hesitate to ask. Listing price is for 1 transformer.

Up for sale here is this NOS vintage Knight power transformer, for the Knight S-755 amplifier. This has no ID on it except on the bottom, where it is marked 1005821 101403 (or possibly T101403). 1005821 means it was made by Northlake Transformer on the 21st week of 1958, and 101403 is the part number. This is a big one! I tested this with 120vAC into the primary, and I measured: Thick white wires 5.05VAC. Thick green wires 6.4v. Three thin white wires 409/409/818v. Each thin white wire to the one red wire 372v, 32v, 310v. Voltages always test a bit higher without a load, so it looks like this has a 5v secondary, a 6.3v secondary, a HV secondary of around 800vCT, and some sort of extra secondary with the red wire. This is a really nice transformer, and would work great for building a tube amp. It is guaranteed to work for you. If you know which amp this goes to, please let me know. Please see my pictures for details and dimensions. If you have any questions, please ask. I have more transformers and other vintage electronics listed–feel free to take a look!

1 UTC CG-16 OUTPUT TRANSFORMER for tube amplifier. Used but in good working condition, tested no open coils.

1960′s Vintage Western Electric Tube PRE-AMP Section 215 KC 158-E-Filter with 437A Transformer. Uses Western Electric 398A and 400A vacuum tubes. 1940, 40s, 1950, 50s, 1960, 60s, 1970, 70s. Part(s) shown in pictures will be the exact part(s) you will receive.

TANGO M-705 Output Transformer Pair Set by the old Hirata Electric Tango (NOT ISO). Tested and working in my 45 SET tube amp. Used with some wear and signs of use/age. Custom finished wood covers are install on the top. Excellent for a 45 tube amp or maybe another tube amp project.

Beautiful 1970s craftsmanship with a Daven attenuator, API meter (working) and two transformers. Original capacitors should be replaced prior to powering it up, chassis has some minor damage (see photos) and the power cord should be replaced.

Both appear to work perfectly based on a multimeter voltage test across all leads, center taps, etc. The mounting holes are on 2.5″ x 2.5″ centers. Their overall height is 3.875. See all photos for Specs / Physical Condition.