Currently, I use a Dentron DTR-2000L linear
which uses a single 8877 / 3CX1500 ceramic tube,
and covers 10 through 160 meter bands.
The amp is rated at 2 KW PEP, but is capable of more!



This is what the 8877 / 3CX1500 looks like:

I used to have a Heathkit SB-220 amplifier



The SB-220 amp uses two 3-500Z tubes.

Two of these puts out around 1000 watts CW.
Heathkit rated this amp at 2000 watts PEP.

I had upgraded / replaced:
  • the HV capacitor bank and the diode rectifier board
  • a slow-start circuit reducing the in-rush current
  • an anti-parasitic kit to eliminate arcing
  • a higher capacity fan giving 30% more airflow

    If you're looking for good retrofit kits for
    the SB-200 or SB-220 follow this link ...
    WA4DRU - Harback Electronics

    Here's a good place for more information
    on modifying your SB-220!
    AG6K - Rich Measures amplifier mods

    I've also installed a STDBY switch since
    I don't believe that it is good to cycle the
    power to the amp and tubes, every time
    you change bands and have to re-tune!

    I also have/use a homebrew VHF amp
    using a single 4CX350 ceramic tube!
    This amp puts out a respectable
    175 watts CW, and almost double
    that on SSB!


    I'm currently collecting the parts needed to
    build a mono-band amp to work on 160 meters.
    The plans I have call for the use of two
    4XC250B's in parallel, that will generate
    1 KiloWatt P.E.P. output.