[amsat-bb] Re: 145/28MHZ conveter and Ts2000 rx antenna

Anthony Monteiro aa2tx at comcast.net
Fri Sep 14 11:34:43 PDT 2007

Hi Pedro,

Yes it is normal but not good. You need to shut off the
TS-2000 internal preamp then if the S-meter is still above
S-0, use an attenuator as Dom suggests. The S-meter should read S-0
with a dummy load on the input to the converter.

Best DX and 73,
Tony AA2TX


At 12:43 PM 9/14/2007, i8cvs wrote:
>----- Original Message -----
>From: "pedro cruz" <pccu2jx at sapo.pt>
>To: <amsat-bb at amsat.org>
>Sent: Thursday, September 13, 2007 11:04 PM
>Subject: [amsat-bb] 145/28MHZ conveter and Ts2000 rx antenna
> > Hi to all
> >
> > Any one use Hamtronics 145/28mhz converter with Ts2000 rx antenna ?
> >
> > My question is when i connect my downcoverter to the Hamtronics and then
>to rx antenna to ts2000 in the FM mode on 28MHz the S-Meter goes to full .
> >
> > This is normal or i have to adjust the Hamtronics ?
> >
> > Best 73 !
> >
> > Pedro Cruz  CU2JX
>Hi Pedro, CU2JX
>The gain of your 145/28 MHz converter is in the order of 20 dB and
>the S-Meter of your TS2000 goes to full receiving only the internally
>generated noise at 28 MHz of your converter.
>Simply connect a fixed 50 ohm attenuator in the order of 10 to 15 dB
>between the 28 MHz output of your converter and the 28 MHz input of your
>TS2000 and try different values of attenuation until the S-Meter
>reading without any signal drops to about S1 or S2
>For similar purposes I use a 50 ohm Telonic variable attenuator with the
>capability to attenuate an input signal by 50 dB in steps of 10 dB and 10 dB
>in steps of 1 dB
>73" de
>i8CVS Domenico
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