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Author Topic: kenwood 870 questions  (Read 376 times)
KX3X
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Posts: 18




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« on: December 09, 2007, 10:20:57 AM »

i have a knwd ts 870 whch is in mint condition and about 30 hours use on it.i notice when get into a ragchew on cw and key down i hear the fan running and when let up it quits. does the fan suppose to run and stay on to cool finals. or do you think rfi is getting into the fan and keying it on.i don't hear the fan running like sum radios do, unless the fan is quiet. anybody have this rig and having same problems. i have rig on second floor and swr is 1:1 on auto tuner.any help on this.
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WB2WIK
Member

Posts: 20560




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« Reply #1 on: December 09, 2007, 06:15:36 PM »

Seems like the fan is activated by transmitting.  I wouldn't worry about it.

However, having said that, I did download the TS-870S manual and like MOST manuals for Japanese equipment, it sucks.  Terrible manual.

Here's why: The fan operation is obviously a physical user interface component and ABSOLUTELY should be mentioned in the manual, describing when it operates and why, and if there are any options to change it.  I didn't see anything about that in the manual, at all.

But they spend several pages discussing things of just about zero importance, including PL tones for 10m repeater work and how to ground the rig.  Ridiculous, and very common in JA instruction manuals.

Every time I read a manual for a piece of ham gear, I have to laugh out loud because they are almost all terrible.

I have the predecessor to that rig (TS-850S) and its manual is sadly lacking as well.  It's a very "long" manual, which I guess made them feel good; it could have been half the length and discussed twice as much, had it been intelligently written.

However, it sounds to me like your rig is fine.  Not at all unusual for a cooling fan to be operational in TX mode and then shut off for RX.

WB2WIK/6
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