Carrier spectrum at full power from a TS-700. The serial number is 161193.


The same as above, but frequency shifted by 100 kHz and with 10dB more signal into the RX144.

This particular unit was modified at the Annaboda meeting in 1980. The modifications were described in
VHF communications in English
UKW berichte in German
Radio och Television in Swedish.

The unit measured above is the unit labelled "B" in the old articles.

Offset           5kHz  10kHz  15kHz  20kHz  50kHz 100kHz 150kHz 
2005 (dBc/Hz)   116.0  127.2  132.6  133.7  138.4  141.4  140.8
1980 (dB)        -      97    100    102    105    106    107
Difference       -      30.2   32.6  31.7    33.4   35.4   33.8

The old values were given in dB for SSB bandwidth (3kHz) as stated in the Introduction: English / / German and consequently the difference should have been 35 dB except at 10kHz where the wider filter used in 1981 affects the result. This unit has been modified several times over the years and the final transistors are no longer the original ones. It seems that the sideband noise has not changed much.


Zoomed in carrier spectrum at full power from a TS-700. The serial number is 161193.