[Kenwood] TS-820S rear panel IF connection

[jkerby]

 I think I found my error. I had set the USB and LSB carrier offset with the
rig changed over in transmit. This centered my IF away from the crystal
filters design frequency. 
 The R-820 is using a higher level point on the PLL board to take its input
from. The IF out line is removed from the back panel of the TS-820 and is
substituted for a connection to the PLL board.
 It seems I can move on to making the mods to transceive with the R-820.
Thanks to Cliff and everyone who helped. 73, de N4YU 
 

-----Original Message-----
From: Clif [mailto:avvidclif at wildblue.net] On Behalf Of Clif Holland
Sent: Monday, November 24, 2008 6:32 PM
To: jkerby; kenwood at mailman.qth.net
Subject: Re: [Kenwood] TS-820S rear panel IF connection

I doubt a frequency counter can read the frequency on the IF out unless you 
tuned in a real strong signal where there is a large carrier output to the 
IF out. A spectrum analyzer will show where it is. Since that is meant to be

fed into the SM 220 and it will "see" a .5 uV signal you won't get anywhere 
near .5v from it unless again you had a very strong signal you were tuned 
to.

The raspy audio is a carrier oscillator adjustment.

Clif Holland KA5IPF
www.avvid.com




----- Original Message ----- 
From: "jkerby" <jkerby14 at comcast.net>
To: <kenwood at mailman.qth.net>
Sent: Sunday, November 23, 2008 3:06 PM
Subject: [Kenwood] TS-820S rear panel IF connection


> Howdy,
> I'm returning a TS-820 to service with a, new to me, R-820. I've re-capped
> the TS and am involved with alignment to ready it to be used with the R. I
> have not done the necessary mods to take the IF injection from the R-820
> yet. I've had very good luck with the alignment and put it on the air to
> test it out a bit. It seems the receive audio is a bit raspy and the IF
> shift knob must be turned a bit off center to make receive audio sound
> correct. I find that the IF connection to the rear panel is widely varying
> from 6.9 MHz to 7.1 MHz with little measurable amplitude. If I'm right it
> ought to be on the order of 8.83 MHz and ~.5V.
> Am I on the right track and are the raspy audio and off center IF shift
> related to the flaky, to me, rear IF output measurement?
> 73, Jeff  /  N4YU
>
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