Attached below is one of the tube amplifiers sent to us for upgrade from a local user. It's probably not appropriate for us to mention the manufacturer name, so we will skip that. The origin of this tube amplifier is PRC.
It is a single ended 300B integrated amplifier. Due to limited budget, the upgrade was separated into 2 phase. The 1st phase was done and the user was happy enough that 2nd phase was called off. Below are some of the 1st phase modifications made to the amplifier.
|Tube Amplifier Upgrade|
2nd phase was plan to include - output transformer upgrade, volume pot change to stepped attenuator, source selector to be changed to Elma made, addition of EMI/RFI filter and also power switch change.
We shall see when the upgrade itch / worm resurfaces.
J&K Audio Design