So what older amps out there are still good enough to still be used with today's modern transceivers or BAs of yesteryear? Of course the older amps, newer transceiver combo might require a little work to be used together, but that is fine also. Some of these older amps can still haul the mail and can be found at a very good price. Of course these older amps might make you actually turn a knob or 2 when tuning up the amp, heaven forbid. Computer controlled amps have their problems, such as propriety software issues, or computer chips that suddenly become unavailable, that will render them useless. Planned obsolescence? I have a 30S-1 that falls into this category. A brute of an amp without a doubt. Since I added the screen mod and the 1500 tube this unit can pump out 1.5 KW pretty much all day, not breaking a sweat while doing it. Sure it is heavy at 130 lbs, but it is bulletproof for the most part and will still be going strong for another 50 years.