Rare Triad HF-18A Triode/Pentode Tube Amplifier HSM-189 Output can use KT88/KT66
This listing is for a Rare Triad HF-18A Triode/Pentode Tube Amplifier HSM-189 Output can use KT88/KT66. This amplifier was gone through by a highly qualified and competent technician and is in good working condition. The amplifier is quite rare and is an exceptionally nice sounding amplifier and can be used in both Triode and Pentode operation. The last picture is of the description of the HF-18 type amplifiers (models HF-18, HF-18A and Hf-18C) from the 1955 Triad Catalog. The difference of the models revolves around each model using different output transformers. The HF-18A uses a HSM-189 output transformer has a frequency response of 7-50,000 Cycles. The last picture also has the schematic of the amplifier. The cosmetics of the amplifier can be seen in the pictures. Some of the electronic part/s may continue for another 50 years without need of replacement and some electronic part/s may fail a few days after you start using the item. The item "Rare Triad HF-18A Triode/Pentode Tube Amplifier HSM-189 Output can use KT88/KT66" is in sale since Thursday, May 27, 2021. This item is in the category "Consumer Electronics\Vintage Electronics\Vintage Audio & Video\Vintage Amplifiers & Tube Amps". The seller is "myostuff" and is located in Island Lake, Illinois. This item can be shipped worldwide.