LogEtronics Inc., of Springfield, yesterday reported its operating profits for 1979 increased 6 percent over the previous year to $1.24 million ($1.17 a share) from $1.17 million ($1.15) in 1978.

The company's total earnings for the year were down slightly, however, because in 1978 LogEtronics had a $110,000 extraordinary credit that increased earnings by 11 cents a share to $1.26.

Revenues of the company last year were up 30 percent to $28.4 million from $21.9 million.

For the fourth quarter of 1979, LogEtronics earned $404,000 (37 cents) compared with $247,000 (24 cents) while revenues increased to $8.1 million from $5.6 million.

HGIC Corp., of Richmond, the parent of Home Guaranty Insurance Corp., reported 1979 profits increased 46 percent to $1.97 million (28 cents a share) from $1.35 million (19 cents) the year before.

B. F. Saul Real Estate Investment Trust announced that cash flow from operations increased from $490,000 to $850,000 in the three months ended Dec. 31, while the net loss for the period declined from $798,000 to $491,000.

Real estate investment trusts often report losses because the depreciation charged against their properties exceeds the cash generated by operations.