JUMA Amateur Radio Forum

Hi folks

Where exactly is the Noise Blanker and Voice Memory on the JUMA TRX2 board located or where will it be installed?

Daniel, HB9DDS

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Daniel,

1. Noise Blanker option has not been launched. The intented location in the main board is (was) the pin header between Polyphase and 1st filter. We made few Noise Blanker prototypes but we did not get good enough results. The technical reason is that the bandwidth is too narrow to detect fast rise times. Additionally a clickless AF blanking is very hard to do.

2. Voice Memory option is located in the DDS board pin headers. See picture below.


See more information of the Voice Memory option here www.nikkemedia.fi/juma-trx2/rev-b/index.html

73 Matti OH7SV