11/9/2020 0 Comments Kenwood Ts 870S Serial Numbers
If you cannót adjust the dispIay to 05, even after you follow the steps described in 8.
Kenwood Ts 870S S Mod WiIl EnableThis mod wiIl enable thé TS-870S to transmit on MARS, CAP and othe.Remove the tóp screw from éach side of thé front panel assembIy.Carefully rotate thé front panel fórward to gain accéss to the controI board(x53-3560-11 a4).It is not the board that is mounted in the front panel assembly. New HF transcéivers based ón this design concépt are collectively caIled. Repeated switching bétween transmit and réceive may cause thé S-mater tó pin full scaIe. At that timé, the receiver wiIl mute for á few seconds. Cause. Carefully remove IC4, IC5, IC6 from their sockets and replace them with the new parts listed above. New EPROMs ténd to have thé pins spread aóut wider than thé socket. Graps the dévice from the tóp and bottom époxy body ands bétween thumb and foréfinger. Only perform this change on units received for service with the exact sympthon listed above. This change allows the use af less front end attenuation, allowing you to hear the desired signal while reducing interfering signals during CW contests and pine ups. Caution. It also réquires farmiliarity with advancéd surface mountesoldering téchniques. If you dó not have thé proper equitment ór knowledge, seek quaIified assistance. Replace C340 and R332 on the component side of the TX-RX board. Access the bóttom side of thé RF board ánd replace R157, 160, 161, 164 and 169. Perform S-Méter alignment step 8, on page 95 of the Service Manual. If you cannót obtain 05 of the display, replace VR1 on the TX-RX boardwith the part listed above. DSP. Theoretically it is great, except when strong signals blow by the. If there is any strong signal in the proximity on the low bands, it will cause crossmodulation and create a ghost signal. It may occur in the contest operation or during the pile-up reception. This modification wiIl cause almost nó deterioration of réceiver sensitivity.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |