Bias Tee TMA
Rev. 00
SN. 7662
| + + + - D L 4 X A V - jo 43 xn - h a m b u r g , g e r m a n y , e u r o p e , e a r t h + + + |
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modification of a GSM bias tee |
|
MIKOM Bias Tee TMA Rev. 00 SN. 7662 |
| band | SWR bevor mod |
SWR after mod |
| 2 m | not testet | 1 : 1.2 |
| 70 cm | 1 : 1.6 | 1 : 1 |
| 23 cm | 1 : 1.4 | 1 : 1.2 |
| now used for 70 cm antenna polarisation switching |
FAQ |
| Q: what is the red line ? A: The red line shows the way the DC voltage reaches the N-connector on the right side. |
| Q: how much RF-power can i run thru the box ? A: the capacitor in the middle of the RF-trace is the limiting factor. (i use only 10 Watts, but i think the unit survives 100 W. check the capacitor-temperature.) |
| Q: can i use the unit on shortwave too ? A: no, the lowest usable frequency depends on the L-value ( VK200 ) and the C-value. in the RF trace. but you can change both values to fit your needs. |
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