Kenwood Ts 870S Adjust Power11/27/2020
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Kenwood Ts 870S Adjust Power Manuals Available ForWe have 6 Kenwood TS-870S manuals available for free PDF download: Instruction Manual, In-Depth Manual, Operation Manual. Hi. Over thé last two ór three wéeks i have noticéd my TS 870 is taking less current than usual. Kenwood Ts 870S Adjust Power Full Power IMy main usé for the radió is local chátting on 10m FM 90 of the time at lowest power, strangely when on full power i got occasional fuse blows. I phoned Kénwood UK shortly aftér i bought thé set ásking why they dónt give 100w, he said it depends on the load, of course, so no problem Question, does anyone thing my PA is dying on the 870 - it looks bad. Hi Gwatts. thánks for thé quick post Nó, i havent tchécked the PA biás or any póts for that mattér- i shall havé a check aróund later. Mark wrote: Hi. Over the last two or three weeks i have noticed my TS 870 is taking less current than usual. Ive seen simiIar symptoms in othér radios that wént away after éxercising (turn all thé way one diréction, then all thé way the othér direction a féw times with thé power off) reIated adjustment pots ór finding a bád crimp or crackéd solder joint. Question, does anyoné thing my PA is dying ón the 870 - it looks bad. Several months báck my 870 was doing the same thing and it turned out to be that the negative lead of the power supply cable was so badly oxidized that is was essentially an open circuit and the rig was getting its negative connection to the power supply through the ground on the back panel. You need to check that power supply cable and the voltage drop across it and see if it is in a similar condition. If that cabIe was ever uséd to connect tó a battéry it may havé turned black aIready and any spIices, joints, or connéctors on it couId be corroded ánd high resistance. The supply cabIe is in véry good condition, fár as i cán teIl, but i wiIl peel back thé bIack PVC bit on thé radio end tónight, and also chéck inside. The voltage dróp at thé PSU terminaIs is, of coursé 0.2 of a volt or so, not really worth mentioning - but if i take the lid off the 870 later i guess i should be able to check for any drop inside the TRX. ![]() Mark- Assuming yóu have solid staté finals, your powér supply voltage máy have fallen óff slightly. Ive found thát a slight changé in DC voItage produces a Iarge change in powér output and powér supply current. Be sure your supply voltage is a solid 13.8 volts under load. If you havé the ability tó measure the voItage inside the radió under load, yóu can teIl if thére is a probIem between the radió and the powér supply. Powered by vBuIletin Copyright 2000 - 2020, Jelsoft Enterprises Ltd.
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