[Kenwood] TS-520SE: Distorted audio/low SSB power out

Tue, 19 Aug 2003 16:53:49 -0500

Didn't this radio come with an RF speech processor or an AF compressor? I
vaguely remember a "DX" button the front panel ? Of course I know that
several 520 radios were made S/SE etc?

Just curious and nostalgic!

73,
Ron, 6Y5/4S7RO

----- Original Message -----
From: "Peter A Markavage" <[email protected]>
To: <[email protected]>
Sent: Tuesday, August 19, 2003 4:30 PM
Subject: Re: [Kenwood] TS-520SE: Distorted audio/low SSB power out

> You're better off sliding a toilet paper roll (empty or full depending on
> your coolness) over the barrel of the MC-50. Same result, except you
> don't have to deal with electrical tape residue if you ever decide to
> sell it. Longer rolls, plastic rolls, or rolls with various holes punched
> in them, will alter the characteristics of your MC-50 audio.
>
> Pete, WA2CWA
>
> On Tue, 19 Aug 2003 15:16:04 -0400 "mark kenward" <[email protected]>
> writes:
> > Another trick is to wrap the barrell of the MC-50 with electrical
> > tape...has
> > worked for me since 1976...K8VF
> >
> > ----- Original Message -----
> > From: "Peter A Markavage" <[email protected]>
> > To: <[email protected]>
> > Sent: Tuesday, August 19, 2003 12:38 PM
> > Subject: Re: [Kenwood] TS-520SE: Distorted audio/low SSB power out
> >
> >
> > > There are a number of feature and component differences between
> > the
> > > original TS-520 and the later TS-520SE. The MC-50 mike is both
> > high and
> > > low impedance. Have you tried reversing the 4 pin plug on the back
> > of the
> > > mike to change the impedance? Connect a 100 watt lamp bulb to the
> > antenna
> > > terminal; tune the transmitter as per the manual instructions;
> > and
> > > observe the lamp brilliance on voice and CW. Also the MC-50 is
> > "mellow"
> > > sounding mike. It does not have "talk-power" output. If you want
> > > "talk-power", get an amplified D-104 to use with the 520SE.
> > >
> > > Pete, WA2CWA
> > >
> > > On Tue, 19 Aug 2003 06:25:17 -0000 "N4EKV" <[email protected]>
> > writes:
> > > > I just purchased a TS-520SE and it is producing gravelly,
> > distorted
> > > > audio on
> > > > SSB and voice peaks are only reaching 10-15 watts.  I'm using
> > the
> > > > MC-50 mic.
> > > > The rig outputs 100 watts on CW and otherwise works fine.  I've
> > > > already
> > > > treated all pots and switches with Deoxit.
> > > >
> > > > I came across Trio-Kenwood Communication, inc. Service bulletin
> > no.
> > > > 21
> > > > (21-10-1977) in a Google search that references common TX and
> > RX
> > > > problems on
> > > > the 520 including "Item 25. Low mic gain: Q1 2SC1000 on Gen
> > unit."
> > > > Could
> > > > that be it?  Q1 is not a 2SC1000 according to my 520SE manual.
> > > >
> > > > Or perhaps it's something else entirely.  Please advise.
> > > >
> > > >
> > > > 73,
> > > >
> > > > Adam N.
> > > > Martinez, California
> > > > www.n4ekv.com
> - - -
>
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