I am quite built despite being an ectomorph, and I hardly ever use gym equipment.
This is my routine. Note: all sets to failure. Total equipment used: 1 ‘door frame’ chin-up bar ($25), 3 x 10kg plates ($8x3), 1 gym belt to hang the plates off ($15), 2 sturdy chairs, a wall, another person.
Day 1
Upper back, biceps, lower legs.
Chinups 4 sets (last 2 sets weighted with the plates once you get over 20 with bw)
Pullups 4 sets (last 2 sets weighted with the plates once you get over 20 with bw)
Single leg calf raises 4 sets (weighted with the plates)
Day 2
Shoulders, chest, triceps, lower back, upper legs.
Handstand pushups 5 sets (feet against a wall, it’s basically a shoulder-press with your whole bodyweigh, not easy and you might only be able to do a handful at the start)
Dips 5 sets (hands on one chair, feet straight in front on another, weighted with the plates on your lap once you get over 20 with bw)
Full squats 5 sets (have person sit on your shoulder, increase size of person as needed
)
Day 3
Rest
With the above program (which is by the way very similar to the strenght program of gymnasts) can build substantial strength and size if combined with all-out effort and good diet. Once you can do 20 chinups and dips with all 3 plates attached, 10 full handstand pushups, and 10 full squats with a big friend
on your shoulders you are going to be rather big and strong believe me. After the above for a few years I not only put on a lot of muscle but in my occasional gym outings I am far stronger than most “bodybuilders” probably due to the compound nature of most of the exercises above.
Hope it helps,
Wall