Re: Topband: Xtal Filter +1

2012-01-04 Thread Bill Cromwell
On Wed, 2012-01-04 at 10:06 -0800, Rick Karlquist wrote: > Bill Cromwell wrote: > > > meters). One of the problems with high levels of electrical noise is > > overloading of the front end and blocking of the receiver. Therefore > > noise that is not actually on or very nearly on your operating fre

Re: Topband: Xtal Filter

2012-01-04 Thread Tim Duffy K3LR
ontesting.com [mailto:topband-boun...@contesting.com] On Behalf Of Craig Clark Sent: Wednesday, January 04, 2012 12:46 PM To: topband@contesting.com Subject: Topband: Xtal Filter Tim and others, What about the filter Sherwood sold for the "old" DX window 1825-1830?? Craig Craig Clark K1

Topband: Xtal Filter

2012-01-04 Thread Craig Clark
Message: 3 Date: Wed, 4 Jan 2012 09:38:35 +0800 (SGT) From: Anton Moehammad Subject: Topband: Xtal Filter To: "topband@contesting.com" Message-ID: <1325641115.89785.yahoomail...@web190006.mail.sg3.yahoo.com> Content-Type: text/plain; charset=utf-8 Hi everybody, I be

Re: Topband: Xtal Filter +1

2012-01-04 Thread Rick Karlquist
Bill Cromwell wrote: > meters). One of the problems with high levels of electrical noise is > overloading of the front end and blocking of the receiver. Therefore > noise that is not actually on or very nearly on your operating frequency > jams you up. I am also investigating some of the loop ante

Re: Topband: Xtal Filter

2012-01-04 Thread Jim F.
    --- On Tue, 1/3/12, Tim Duffy K3LR wrote: From: Tim Duffy K3LR Subject: Re: Topband: Xtal Filter To: "'Anton Moehammad'" , topband@contesting.com Date: Tuesday, January 3, 2012, 9:16 PM Hello Anton! Here is a link to a 5 KHz 160 meter RX filter y INRAD. This may be what y

Re: Topband: Xtal Filter +1

2012-01-04 Thread Petr Ourednik
, January 03, 2012 7:39 PM > To: topband@contesting.com > Subject: Topband: Xtal Filter > > Hi everybody, > > I believe there is a 1825 KHZ xtal filter sell somewhere, can any body > share their experience about put a narrow XTAL filter in front of their > recv ?

Topband: Xtal Filter

2012-01-03 Thread Bruce
Tried it a few years ago as an experiment. Broke the antenna coax center lead and inserted the crystal. Worked great on one frequency. Would have been even sharper with a crystal holder capacitance balancing circuit like communications receiver xtal filters of the early years. One heck of a r

Re: Topband: Xtal Filter

2012-01-03 Thread Tim Duffy K3LR
and-boun...@contesting.com] On Behalf Of Anton Moehammad Sent: Tuesday, January 03, 2012 7:39 PM To: topband@contesting.com Subject: Topband: Xtal Filter Hi everybody, I believe there is a 1825 KHZ xtal filter sell somewhere, can any body share their experience about put a narrow XTAL filter in front

Re: Topband: Xtal Filter

2012-01-03 Thread Bill Cromwell
On Wed, 2012-01-04 at 09:38 +0800, Anton Moehammad wrote: > Hi everybody, > > I believe there is a 1825 KHZ xtal filter sell somewhere, can any body share > their experience about put a narrow XTAL filter in front of their recv ? (CW > works only) > > >  > Ir Moeh AntonHendra > Jambon Tengah

Topband: Xtal Filter

2012-01-03 Thread Anton Moehammad
Hi everybody, I believe there is a 1825 KHZ xtal filter sell somewhere, can any body share their experience about put a narrow XTAL filter in front of their recv ? (CW works only)  Ir Moeh AntonHendra Jambon Tengah no 290 RT1/RW3 Magelang 56121 Indonesia Mobile : +6285292611160 email   : moe