Balance is not possible here because of the odd number of teams. In the schedules that follow some of the teams (the ones that do not have a bye) will get to try each game once, the others miss a round and miss a game.
11 teams (A to K) and 6 games
G1 G2 G3 G4 G5 G6 Bye
(---) (D H) (B I) (G F) (J K) (C E) A
(E D) (---) (H G) (I J) (F C) (K A) B
(G K) (F A) (---) (E B) (D I) (H J) C
(F J) (C K) (E A) (---) (H B) (G I) D
(H I) (G J) (F K) (C A) (---) (D B) E
(C B) (E I) (D J) (H K) (G A) (---) F
13 teams (A to M) and 7 games
G1 G2 G3 G4 G5 G6 G7 Bye
(---) (M G) (L F) (K E) (J D) (I C) (H B) A
(H C) (---) (M A) (L G) (K F) (J E) (I D) B
(I E) (H D) (---) (M B) (L A) (K G) (J F) C
(J G) (I F) (H E) (---) (M C) (L B) (K A) D
(K B) (J A) (I G) (H F) (---) (M D) (L C) E
(L D) (K C) (J B) (I A) (H G) (---) (M E) F
(M F) (L E) (K D) (J C) (I B) (H A) (---) G
