Eight persons have been indicted here on charges of running an illegal street corner "drugstore" in the 1800 block of 7th Street NW that reportedly sold up to $8,000 worth of herion and pills a day to its patrons, metropolitan police and federal drug officials said yesterday.

The indictments resulted from what investigators said was a new technique used by the drug Enforcement Administration and the Metropolitan Police Department to systematically "target" complete street corner narcotics networks for investigation. The indictments came at the end of a 5 1/2-month probe of illegal narcotics activity in the 7th and T Streets NW area.

Among the investigative techniques used in monitoring the alleged narcotics ring was widespread videotaping of the drug transactions by hidden police cameras.

One investigator who has seen films of the transactions said the drug sellers would carry out their deals with the precision of an Olympic relay team as money was collected and drugs were dispensed with furtive handshakes.

The firms reportedly depict a nearly deserted scene along 7th Street between S and T Streets NW until a little after 10 a.m. Then, three or four men would arrive and take up locations along the block.

Within minutes, according to federal and local investigators, the street would be teeming with scores of addicts who would come from all over the city and the suburbs to make illegal drug purchases.

The ring had curbside service for persons driving in for their purchases, investigators added. One person would collect the money, motion to another that he had the payment, and a third person would remove the drugs from a stash inside a tree, a mailbox or a vacant building, investigators said.

Another person would then bring the narcotics back to the purchaser, investigators said.

Assistant U.S. Attorneys C. Madison Brewer and Barry L. Leibowitz of the major crimes division said in court yesterday that the ring allegedly operated in the 1800 block of 7th Street NW from 10 a.m. until 10 p.m. during the summer months, but recently cut the summer months, but recently cut back its operations to 1 p.m. to 10 p.m.

Named in the indictments as the leaders of the organization were John R. (Stampede) Johnson, 36, who gave his address as 312 16th St. SE., and his brother, Odell whose precise age and address were not available. The indictments were returned secretly on Tuesday, to allow for the arrests of defend-court that John Johnson, who has a ants and were made public yesterday.

Also indicted were Arthur (Speed) Watson Jr., age and address unavailable: Joh Roscoe (Slave) Slade, of 406 13th St. NE.; George Norman (Little George) Marshall age and address unavailable: Donald Larry Baxter, of 614 S St. NW; David (Slim) Redds, age and address unavailable; and Mary Ann Brown, age and address unavailable.