It has been brought up to voltage with a variac and tested. All functions seem to work, but it is very scratchy when turning controls and will need further attention including a good pot cleaning. You may want to recap as well. I noticed no excessive heat other than the normal tube heat. No humming came through in the sound as I tested. I ran it for 45 minutes and then powered it down. It will be packed very carefully , bubbled, and double boxed with both cushioned protection for tubes, as well as foam board layers all around. The item “Vtg 1960s Harman Kardon Award Series A50K Tube Amplifier Amp Working Sold As Is” is in sale since Thursday, September 2, 2021. This item is in the category “Consumer Electronics\Vintage Electronics\Vintage Audio & Video\Vintage Amplifiers & Tube Amps”. The seller is “kmkienzler” and is located in Enfield, Connecticut. This item can be shipped to United States.

• Brand: Harman Kardon
• Type: Tube Amplifier
• Model: A50K
• MPN: Does Not Apply
• Country/Region of Manufacture: United States

Vintage Harman Kardon A50K (A500) Integrated tube amplifier Amp. Brought Up To Variac, Cleaned Pots, Tested and Works Fine. Good Condition with Minor Scratches and Dirty. Some Rust on Bottom Cover. May Refinish if You Want. The item “Vintage Harman Kardon A50K (A500) Integrated tube amplifier Amp Works Fine” is in sale since Wednesday, July 10, 2019. This item is in the category “Consumer Electronics\Vintage Electronics\Vintage Audio & Video\Vintage Amplifiers & Tube Amps”. The seller is “notjusthifi” and is located in Northridge, California. This item can be shipped to United States, Canada, United Kingdom, Denmark, Romania, Slovakia, Bulgaria, Czech republic, Finland, Hungary, Latvia, Lithuania, Malta, Estonia, Australia, Greece, Portugal, Cyprus, Slovenia, Japan, China, Sweden, South Korea, Indonesia, Taiwan, South africa, Thailand, Belgium, France, Hong Kong, Ireland, Netherlands, Poland, Spain, Italy, Germany, Austria, Bahamas, Israel, Mexico, New Zealand, Philippines, Singapore, Switzerland, Norway, Saudi arabia, Ukraine, United arab emirates, Qatar, Kuwait, Bahrain, Croatia, Malaysia, Brazil, Chile, Colombia, Costa rica, Panama, Trinidad and tobago, Guatemala, Honduras, Jamaica, Grenada, Barbados, Bangladesh, Bermuda, Bolivia, Ecuador, Egypt, Guadeloupe, Iceland, Jordan, Sri lanka, Luxembourg, Macao, Martinique, Maldives, Peru, Pakistan, Reunion, Viet nam, Uruguay.

• Brand: Harman Kardon
• Country of Manufacture: United States
• Model: A50K
• Type: Integrated Amplifier
• Country/Region of Manufacture: United States

Amazingly clean Harman Kardon A50K – only a few tiny marks on the facpelate as the pictures show.. This is the same beast as an A500. 7355s power tubes are 3 NOS and one that tests as NOS; all same construction – these are hard to find tubes and not cheap in this quality. Vintage US 7025 (3) and a 12AX7 and a 12AU7. New very high quality Roederstein / ERO MKT coupling caps and Nichicon small value electrolytics as seen. Tested phono (Sansui SC2050 with a near new Stanton EEE) and Aux (iphone) in -played for hours with no problems. Can Electrolytic capacitors are original and should be replaced at some point for it to be considered perfectly reliable. Im happy to audition this locally. What you see is what you will receive. The item “Vintage Harman Kardon A50K A500 Integrated Stereo Tube Amplifier 7355 Tested” is in sale since Tuesday, March 12, 2019. This item is in the category “Consumer Electronics\Vintage Electronics\Vintage Audio & Video\Vintage Amplifiers & Tube Amps”. The seller is “prima5star” and is located in Oakland, California. This item can be shipped to United States, Canada, United Kingdom, Denmark, Romania, Slovakia, Bulgaria, Czech republic, Finland, Hungary, Latvia, Lithuania, Malta, Estonia, Australia, Greece, Portugal, Cyprus, Slovenia, Japan, China, Sweden, South Korea, Indonesia, Taiwan, South africa, Thailand, Belgium, France, Hong Kong, Ireland, Netherlands, Poland, Spain, Italy, Germany, Austria, Bahamas, Israel, Mexico, New Zealand, Singapore, Switzerland, Norway, Saudi arabia, Ukraine, United arab emirates, Qatar, Kuwait, Bahrain, Croatia, Malaysia, Brazil, Chile, Colombia, Costa rica, Panama, Trinidad and tobago, Guatemala, Honduras, Jamaica, Viet nam, Uruguay.

• Country/Region of Manufacture: United States

Complete Vintage Harman Kardon A50K (A500) A50K was the DIY kit version of the A500 Unit shows very nice build quality. Original Harman 7355 tubes (4) Original 12A7X tubes (4) Original 12AU7 tube (1) Complete Original Working Condition. Good Candidate for restoration / capacitor upgrade. All switches and knobs work but could use a good cleaning. Unit shows some oxidation on aluminum cover. This is a 60+ year old amplifier. It will need some love to perform like new again. The item “Vintage Harman Kardon A50K Award Series A500 Integrated Tube Amplifier complete” is in sale since Sunday, December 9, 2018. This item is in the category “Consumer Electronics\Vintage Electronics\Vintage Audio & Video\Vintage Amplifiers & Tube Amps”. The seller is “brewtronix” and is located in Viroqua, Wisconsin. This item can be shipped to United States, Canada, United Kingdom, Denmark, Romania, Slovakia, Bulgaria, Czech republic, Finland, Hungary, Latvia, Lithuania, Malta, Estonia, Australia, Greece, Portugal, Cyprus, Slovenia, Japan, China, Sweden, South Korea, Indonesia, Taiwan, South africa, Thailand, Belgium, France, Hong Kong, Ireland, Netherlands, Poland, Spain, Italy, Germany, Austria, Bahamas, Israel, Mexico, New Zealand, Philippines, Singapore, Switzerland, Norway, Saudi arabia, Ukraine, United arab emirates, Qatar, Kuwait, Bahrain, Croatia, Malaysia, Brazil, Chile, Colombia, Costa rica, Panama, Trinidad and tobago, Guatemala, Honduras, Jamaica, Viet nam.

• Brand: Harman Kardon
• Model: A50K
• Type: Integrated Amplifier
• Country/Region of Manufacture: United States
• MPN: A500

Harman Kardon The Award Series A50K Vintage Tube Amplifier, Fully tested and working good, all tubes light up and are good Has Original HK and Telefunken tubes. The item “Rare Harman Kardon The Award Series A50K Vintage Tube Amplifier” is in sale since Tuesday, January 30, 2018. This item is in the category “Consumer Electronics\Vintage Electronics\Vintage Audio & Video\Vintage Amplifiers & Tube Amps”. The seller is “davidskittles” and is located in Santa Rosa, California. This item can be shipped to United States, Canada, United Kingdom, Denmark, Romania, Slovakia, Bulgaria, Czech republic, Finland, Hungary, Latvia, Lithuania, Malta, Estonia, Australia, Greece, Portugal, Cyprus, Slovenia, Japan, China, Sweden, South Korea, Indonesia, Taiwan, South africa, Thailand, Belgium, France, Hong Kong, Ireland, Netherlands, Poland, Spain, Italy, Germany, Austria, Russian federation, Israel, Mexico, New Zealand, Philippines, Singapore, Switzerland, Norway, Saudi arabia, Ukraine, United arab emirates, Qatar, Kuwait, Bahrain, Croatia, Malaysia, Brazil, Chile, Colombia, Costa rica, Panama, Trinidad and tobago, Guatemala, Honduras, Jamaica.

• Brand: Harman Kardon
• MPN: Does Not Apply
• Type: A50K