[UK-CONTEST] 80M CC G3SJJ

[Ian Trusson]

Clive,

Both mods add a 0.1 microfarad capacitor to the RF board so are the same in
that regard. 

The W8JI adds a network containing two 0.1 microfarad capacitors in series
and a couple of pots to the IF board. The Inrad mod adds a single 0.47 micro
farad capacitor (which is the same as two 0.1 microfarad capacitors in
series) and a single fixed 100 Kohm resistor. Depending on the settings of
the two pots the W8JI mod could give a softer result, as you say, if this is
desired.

I saw someone put some pictures on the web showing the W8JI mod but with the
pots replaced by fixed resistors of the same value as the pots - I guess
that would be overdoing the softness.

Regards,
Ian Trusson, G3RVM
www.nadars.org.uk
27A Roman Way, Thatcham, Berks RG18 3BP.  Tel: 01635 826019


> -----Original Message-----
> From: uk-contest-bounces at contesting.com [mailto:uk-contest-
> bounces at contesting.com] On Behalf Of Clive GM3POI
> Sent: 23 February 2007 12:01
> To: Ian Trusson; uk-contest at contesting.com
> Subject: Re: [UK-CONTEST] 80M CC G3SJJ
> 
> Ian as I gather the situation with the Inrad mod is it is not as good as
> the
> W8JI mod. An 1000mp still has close in clicks after the mod but is better
> than the stock MP and can be installed fairly easily. 73 Clive GM3POI
> ----- Original Message -----
> From: "Ian Trusson" <ian.trusson at ntlworld.com>
> To: <uk-contest at contesting.com>
> Sent: Friday, February 23, 2007 11:28 AM
> Subject: Re: [UK-CONTEST] 80M CC G3SJJ
> 
> 
> > Ian,
> >
> > I used this reference and it worked well:
> >
> > http://www.k1ttt.net/technote/Inradkeyclickmod2.pdf
> >
> > No long wire leads, no extra board and no pots, just a capacitor
> soldered
> > directly under the RF board and a resistor & capacitor soldered directly
> > under the IF board.
> >
> > After the mod on the scope both rise and fall times are nicely rounded
> > over
> > a few msecs.
> >
> > Regards,
> > Ian Trusson, G3RVM
> > www.nadars.org.uk
> > 27A Roman Way, Thatcham, Berks RG18 3BP.  Tel: 01635 826019
> >
> >> -----Original Message-----
> >> From: uk-contest-bounces at contesting.com [mailto:uk-contest-
> >> bounces at contesting.com] On Behalf Of Ian White GM3SEK
> >> Sent: 23 February 2007 09:39
> >> To: uk-contest at contesting.com
> >> Subject: Re: [UK-CONTEST] 80M CC G3SJJ
> >>
> >> G0XBV wrote:
> >> >In a message dated 23/02/07 08:14:49 GMT Standard Time,
> >> g4buo at compuserve.com
> >> >writes:
> >> >
> >> >
> >> >> This was a problem during the ARRL contest as well. At one point
> T96Q
> >> >> was about 1.5kc from my frequency but his noise sidebands were
> making
> >> it
> >> >> impossible to copy weak callers on my frequency. He was more T6 than
> >> T9.
> >> >
> >> >Also, pretty much all US/VE sigs that I heard were de-clicked.  EU
> sigs
> >> were
> >> >in marked contrast quite frequently!
> >> >
> >>
> >> Since charity begins at home, is there anyone here who still hasn't had
> >> his FT-1000 de-clicked?
> >>
> >> Yaesu have consistently got this wrong, for model after model of the
> >> FT1K, so every FT-1000D, MP and MkV ever made NEEDS this little snip.
> >>
> >> All FT1K owners have been let down about this, so it really isn't about
> >> naming and shaming any individuals. All that matters is that the mod
> >> gets done. So...
> >>
> >> 1. Go to www.w8ji.com
> >> 2. Pick the mod page for your model (older MPs use the MkV mod)
> >> 3. PLEASE do it.
> >>
> >>
> >> --
> >>
> >> 73 from Ian GM3SEK
> >> _______________________________________________
> >> UK-Contest mailing list
> >> UK-Contest at contesting.com
> >> http://lists.contesting.com/mailman/listinfo/uk-contest
> >
> > _______________________________________________
> > UK-Contest mailing list
> > UK-Contest at contesting.com
> > http://lists.contesting.com/mailman/listinfo/uk-contest
> 
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