I used Google to translate this interesting German language piece - http://www.biener-media.de/1431.html
OPS Berlin
In the sixties, Radio Berlin International produced a special program for American soldiers. Shortly after the Wall began on 25th August 1961 at the Berlin 1430 kHz medium wave half an hour for the American soldiers now walled in Berlin. Only one day was called the station "Berlin Iceland", the following have contributed to its longtime name "OPS Outpost Station": "This is OPS Berlin, the programme which entertains and informs. Nightly We broadcast to Americans in West Germany and Europe. "
In music and narration OPS corresponded entirely to competitors, the American soldiers AFN stations. As it seemed to be particularly directed at soldiers Afro-American origin, because when we played music especially black musicians title and the messages dealt alongside Vietnam especially with the racism in the United States. The identity of presenters remained veiled. One can assume that Bert Pierce, Dick Larson Professor Lobo or pseudonyms. At that time broadcast on Radio Berlin International an OPS known as the voice of Martin Dies. This name is the first chairman of the House Un-American Affairs Committee, which in those years Communists chased. In the broadcasts, the address "OPS Berlin, c / o Radio Berlin International, Berlin W8". In this respect, the audience could not have mistaken the origin, if they knew that RBI of the East German foreign service and the postal code W8 on the eastern part of the city indicated.
For medium wave came 23.00-23.30 hours short waves as 1961 6080, 7185, 7300 and 9730 kHz or 1968 6080, 6115, 7185 and 9730 kHz. In January 1972, at a time when the German-German heraufzog relaxation on the horizon, even this station abandoned the Cold War. In US archives (http://arceb.archives.gov/arc/servlet/arc) 45 CIA apparently recordings of OPS programs survived.
I was a regular listener to the OPS programme, which was very different from the other services of Radio Berlin International. I used to listen on medium wave in the UK, where reception was usally good,apart from the first ten minutes when Denmarks Radio was on the same frequency. The OPS show was very laid back and played a lot of soulful music that was obviously aimed at a black audience. For example I remember that songs by the South African anti-apartheid exile Miriam Makebe often featured on the show.
The programme was inevitably hosted by two presenters,one male and one female, and the main male announcer was, as you mentioned, "Professor Lobo", a very cool-sounding man who used a lot of current American slang and spoke slowly in a deep Afro-American voice. He was indeed called "Martin Dies" on the few occasions I heard him on the RBI English programme for the UK. This was, I imagine,a kind of joke by the RBI staff, bering in mind that the real Martin Dies had been a well-known anti-communist politician.
Each day's programme would start with the announcement mentioned in your write-up and, after some music, there would be a news bulletin in which Vietnam and Americn racism would feature prominently and items on these two subjects would often be read back-to-back in order to create a psychological link in the listeners' mind. There were also many items suggesting that the West German government was riddled with Nazi sympathizers who wanted revenge for their defeat in World War Two. I also remember hearing the occasional off-beat news item that would not have been broadcast on other RBI services, for example a piece about a snowaball fight between American and North Korean soldiers. On Saturday or Sunday the usual bulletin was replaced by a review of the week's news and on Sunday there was a mini-play entitled "Conspiracy of Silence", focusing each time on a former Nazi who was in a prominent position in West German society.
Another interesting point: When I first started listening the programme's signature tune was "Don't Fence Me In" but this was changed at some point, perhaps because it encouraged listeners to think about the Berlin Wall!