From: Arturo Yanez <kp4yp@yahoo.com>
Date: Sat, 23 Jan 1999 20:38:50 -0800 (PST)
Subject: [Kenwood] TS440S Audio Distortion at TX
Message-ID: <19990124043850.20888.rocketmail@send205.yahoomail.com>

I have a Kenwood TS440S Serial # 10400XXX.

I have couple of questions and problems...  If someone can help me,
I'll be grateful.....  Reply to: kp4yp@yahoo.com

1. I try to transmit in any band, and there is a lot of distortion in
the audio.  I changed Microphone and I still have the same problem. 
There is more distortion in SSB mode than in AM.  AM is more clear.

2.  How do I know that the PLL is unlocked?  Cheching UL pin of
connector J6 in PLL board?

3.  I tried to TX in 20m(14MHz) and the radio blank the display,
displays couple of dots and then turn off the TX light.  Then the
display is working again.  All this ocurrs in less than 1 sec.  Is
this because of PLL unlocked?

4.  Just for fun, I changed the power supply to my car battery.  The
problem in 20M(14MHz) is fixed.  So the power supply somehow affect
the performance of the TS440.  The only thing comes to my mind is that
there is some AC compoonets in the 12VDC of the power supply.  I check
it with a oscilloscope and there is some, but less than 25mV!!  Did
someone knows why?  Why only in 20m?

5.  I read about the problem in VCO5.  Could this problem in VCO5
affect the distortion when TX's?  Why I don't have the problem in RX? 
By the way, I just disconnect the RF unit cable that goes to the
finals and I still have the distortion.

Please, If someone can help me, so I can be back in the air.  Reply
to:  kp4yp@yahoo.com

Thanks,

73 DX,

KP4YP
Arturo Yanez  

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From: W Halse <whalse@revealed.net>
Date: Sat, 23 Jan 1999 13:21:32 -0600
Subject: [Kenwood] WANTED SP940
Message-ID: <36AA213C.3631B56C@revealed.net>

Wanted SP940 speaker.
reply to whalse@revealed.net

Thanks

Bill, KC9DK

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From: "Bob Sova" <wb3leq@alltel.net>
Date: Sat, 23 Jan 1999 14:25:05 -0500
Subject: [Kenwood] TS-600 All Mode 6 Meter Wanted
Message-Id: <199901231926.NAA07046@mail.alltel.net>

Hello to all Kenwood fans,

I have been looking for TS-600 six meter all mode to complete my '80s
station.  So far I have been able to locate two units but both are not
functioning properly. One unit functions without the AM mode but is
operational in SSB and FM modes.  Was there a common problem with this
model and is there an easy fix or do they usually require a trip to the
Kenwood service center for repair?  

Regards
Bob Sova
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From: "Steve Ellington N4LQ" <N4LQ@iglou.com>
Date: Sat, 23 Jan 1999 11:53:24 -0500
Subject: Re: [Kenwood] Xfmr
Message-ID: <004601be46f0$e545ba00$1fefffcc@steve>

http://www.pwdahl.com/index5.htm
---



>Still looking for a fils xfmr 110v/7.5v@25A  such as "Triad F-28U" (for
>a 4-1000a)
>Any help appreciated.  Thanks, K6ZL
>
>-----
>Submissions: kenwood@qth.net
>
>

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From: Popgun <popgun@worldnet.att.net>
Date: Sat, 23 Jan 1999 09:32:16 -0800
Subject: [Kenwood] Xfmr
Message-ID: <36AA07A0.69F64390@worldnet.att.net>

Still looking for a fils xfmr 110v/7.5v@25A  such as "Triad F-28U" (for
a 4-1000a)
Any help appreciated.  Thanks, K6ZL

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From: Randy Starace <randy@kk7tv.com>
Date: Sat, 16 Jan 1999 03:18:11 -0700
Subject: Re: [Kenwood] TS940
Message-ID: <36A06763.1C2545CA@kk7tv.com>

Ok Paul,

    Good work so far.  The reason you see the differences in the band
pass is due to an alignment problem.   You will note that all the
filters are made up of  adjustable coils and fixed caps.   You have
to re do the 80 meter and 20 meter sections to have more linearity.
You don't need a sweep generator ( though it would be easier )  Just
follow the manual and go to each frequency you listed and find the
best compromise in signal strength.  In fact do them all.   It is
easier then is looks.  Don't be surprised if you have to bring the
overall gain ( so to speak) down on 80m ( for example) to get a
linear response.  No worries as we have so much gain further on down
the chain.   Keep me posted
"grasshopper".  We will do PIN diodes next.
Randy

Paul Erickson wrote:

> Hi Randy,
>
> Ok, I have resoldered/defluxed the pll and rf boards. The
> display is stable, and now the variation between bands
> using the calibrator is less, but there are a few areas
> that concern me. Here is some freq related data. Normal
> is around 9+20 on most of the bands.
>
> 3.1        9+10
> 3.2        9+20
> 3.3        9+18
> 3.4        9+10
> 3.5        9
> 3.6        9+3
> 3.7        9+18
> 3.8        9+19
> 4.0        9+22
>
> 10.1        9+12
>
> 14.0        9+20
> 14.1        9+20
> 14.2        9+22
>
> 21.0        9+7
> 21.1        9+10
> 21.2        9+13
> 21.3        9+15
> 21.4        9+12
> 21.5        9+10
>
> 28.0        9
> 29.0        9
>
> Is this enough information? As far as I can tell, only one filter
> is in use at a time on the rf board. Also, I would appreciate
> some more info on the pin diode mods if possible.
>
> cheers, Paul VE7CQK/email: paule@sfu.ca



--
Randy Starace
KK7TV Communications
Factory authorized repair facility for:
ICOM  YAESU  KENWOOD  ALINCO
http://www.kk7tv.com


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