[Kenwood] TS-870S HELP

[Mark Kenward]

If you just GOT the radio and it is doing this, then possibly someone has 
been in alignment menu....tricky adjustments abound and too many of us try 
to "improve" the rig.

Either way, try these settings:

Is power control set to  full power?

Are you on SSB?

If so, is processor turned on?

Procesor has INPUT AND output adjustments to make.....

First I would turn OFF the processor to take this out of the possibilities.

Meter in ALC? ....In SSB?.....speak into mike to adjust output with mic 
control.

In CW?

Key down and adjust carrier for full output.(assuming power is at full 
output?)

In cw, you adjust carrier control on ALC meter reading......keep it low as 
possible while giving output you desire or key clicks may be present..



After checking this, please let us know what is happening.

Mark
K8VF
----- Original Message ----- 
From: <N4ch at aol.com>
To: <tgrieco at optonline.net>
Cc: <kenwood at mailman.qth.net>
Sent: Tuesday, November 12, 2013 7:31 PM
Subject: Re: [Kenwood] TS-870S HELP


> Sounds like SWR is not causing your problem.    First, check the radio 
> with
> a GOOD, accurate wattmeter and a GOOD 50 ohm dummy  load, and check all
> bands.   The wattmeter in the radio is only as  accurate as its alignment 
> (or
> mis-alignment).   If the power is  100 watts on some bands and a lot less 
> on
> others, the finals are probably  OK, but there may be an issue with
> alignment, or possibly one of the  relay-switched low pass filter sections 
> may have
> a problem.   It's  been years since I've been into a TS-870, but there's
> probably an ALC level  adjustment pot INSIDE the radio where you set the
> MAXIMUM available output  level, with the front panel controls (mike gain, 
> carrier
> level) set at  maximum........this will limit the output to a safe level
> (typically 100 watts)  on all bands.   Not sure if this is the case with 
> the
> TS-870, but  quite a few radios of that era also have a switch inside the
> radio that will  limit the output power to something well below the 100 
> watt
> spec........typically 10, 25, or 50 watts.   Some of the newer radios 
> have
> this done via a setup menu step instead.   If you don't have  a service
> manual, see if you can find one.   This will make things a  lot easier 
> than
> relying on just the operation manual that came with the radio  when it was
> shipped new.   Finally, check the power supply and  cable.   I've seen 
> many
> otherwise good radios and power supplies  interconnected with wire that 
> was not up
> to the task........heavy gauge wire  must be used here to avoid voltage
> drops, which could cause low  power.   You should have at least 13.0 to 
> 13.5
> volts DC present at the  power socket on the back of the radio while it is
> keyed and drawing 20-25 amps  of current, which may be required at the 100 
> watt
> output level.   Good  luck.
>
> 73, Herman, N4CH.
>
> In a message dated 11/12/2013 3:21:08 P.M. Eastern Standard Time,
> tgrieco at optonline.net writes:
>
> I have a  Kenwood TS-870s that needs help.
> New antenna which is 1.1 to 1
> Unable to  get more than 50 Watts output.
> I have several other radios working fine  with antenna with full output.
> I don't understand how to use the Kenwood as  far as increasing the out
> put.
> Asked several times previous, but no  help?
> Would someone please take the time to help me  out.
>
> K1SYN
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