The National Education Association, which has no love for the Reagan administration, is putting its money where its feelings are. So far this year its political action committee has raised $805,000, twice as much as last year, and the delegates to its convention approved a record political action budget of $3.4 million, $1.5 million of which is earmarked for the congressional elections this fall. It also plans to field an army of 30,000 volunteers....The Democratic Congressional Campaign Committee says that House Speaker Tip O'Neill may be the Republicans' bete noir but he's one of the best fund-raisers. A letter signed by the speaker and sent out about three weeks ago is expected to bring in about $200,000 by the end of this month ....Public Citizens' Congress Watch says three dairy producers' political action committees contributed $546,890 to members of Congress over the past 17 months. The Ralph Nader group is cruel enough to suggest that the fodder outlay was intended to keep dairy price supports high, at a cost of about $2 billion to the taxpayer. Its study finds that House members who voted for the price supports received an average of $1,600 from the PACs and those who voted against them got an average of $200. Senators up for reelection who voted "right" got an average of $1,900; the others had to make do with an average of $300.