Still, the company's consolidated margin continued to improve, rising to 41 per cent in the first half, from 35 per cent in the second half of last year and 28 per cent in the first half last year, as a result of a change in product mix, technology transition and a currency benefit, Robinson said.
"The strategy previously implemented to focus on better product and operating margins is evident in this result."
Rakon expects higher profitability over the second half of its financial year, compared with the first half, with a slow return to growth expected in the telecommunications market and an increase in space and defence revenues from the delivery of key projects timed during the second half, it said.
The company affirmed its previous forecast for annual earnings to be similar to last year's underlying earnings before interest, tax, depreciation and amortisation of $15.4 million and net profit of $3.2 million.
Its shares gained 1.9 per cent to a two-week high of 26.5 cents.
Rakon turned to positive net cash flow of $5.3 million in the first half, compared with a negative $30,000 in the year-earlier period, helping it to reduce net debt to $9.7 million, from $13.4 million at the end of the 2015 financial year.
The company didn't declare a dividend.