Found this article on:
www.radioeins.de/programm/sendungen/medienmagazin/radio_news/beitraege/2015/guyana.htmlUnfortunately was I not able to copy the pictures from the article.
The state radio Guyana (National Communications Network) has commissioned the repair of his 2012 failed shortwave transmitter. This is a solid-state transmitters installed in 2010 with 10 kW and operating frequency 3290 kHz. The previously used tube stations are apparently no longer exists.
By the supplier, specialized in the production of such AM transistor transmitter technician Jamie Labadia, the transmitter is activated provisionally on 2 February 2015 and is now running at 1 kW. A new full power operation is possible only after further repairs to the transmitter and antenna.
According Labadia is checked, switch the transmitter on a higher frequency. How has shown is the current frequency in the 90-meter band itself for the purpose of supplying the maximum 500 km away inland from Guyana to low.
In the past, the state radio Guyana also took a short wave frequency in the 49-meter band (most recently 5950 kHz). However, a higher current switching between day and night lower frequency, which supports the propagation conditions into account each different is possible only with transmitters in tube technology.