Up for sale here is this set of two (2) brand new replacements for the 2SA798 dual transistor. The 2SA798 frequently goes bad in vintage equipment, and can cause you to have high DC offset, crackling, and more problems. The original dual transistors have been discontinued for decades, and are difficult to find, but luckily I have an easy replacement for it, using the Diodes Incorporated DMMT5401-7-F. 

This listing is for 2 completely built 2SA798 replacements, so all you have to do is add wires and install them. For the wires, just use cut-off leads from capacitors, resistors, or diodes. If you do rebuild work you should have plenty of them available. These are nice and small and will fit easily. Each board is 8mm x 10mm and is 2.7mm thick.

Installation is fairly easy--you will need a soldering iron, solder, and some sort of desoldering device.

US shipping and handling is $7, and international is $21, no matter what quantity you buy. All my small parts are set up for combined shipping, so just use the "add to cart" feature and then check out all at once, and it will combine shipping. If you have any questions, please ask.