Fairchild Industries has made a new offer to buy all the stock of Bunker Ramo Corp. of Oak Brook, Ill., Bunker Ramo revealed yesterday.

Bunker Ramo in June rejected an offer by Fairchild to buy about 27 percent of its stock for $47.6 million.

Terms of the new offer by Fairchild were not revealed, but Bunker said it would be "above the market price" of about $25 a share.

Merger talks between the Germantown aerospace company and Bunker Ramo began last spring when Fairchild purchased about 21 percent of Bunker's stock from Martin Marietta Corp. of Bethesda for $27.4 million.

Under terms of its agreement with Martin Marietta, Fairchild agreed not to buy any more stock of Bunker Ramo without the permission of Bunker's board of directors. Fairchild President Edward Uhl is one of Bunker's 11 board members.

Bunker Ramo's announcement yesterday said that company did not solicit the new offer from Fairchild and stressed that Bunker will not waive its right to block any stock purchases by Fairchild.

Rather than seeking a merger, Bunker spokesmen said the company is trying to work out a deal to buy back the stock that is now owned by Fairchild.