A quick followup -- the ARRL info on telephone interference is at:
http://www.arrl.org/tis/info/rfitel.html
Now, time to go home and try to get my wife to speak to me. :-)
73,
Ed Hare, W1RFI
ARRL Lab
225 Main St
Newington, CT 06111
Tel: 860-594-0318
Internet: w1rfi@arrl.org
Web: http://www.arrl.org/tis
> -----Original Message-----
> From: Hare,Ed, W1RFI
> Sent: Monday, December 02, 2002 7:21 PM
> To: rfi@contesting.com
> Subject: RE: [RFI] RFI resistant telephones
>
>
> Hi, Ed,
>
> Radio Shack has an extensive set of specifications their
> vendors have to meet. Last I checked with RS, they require
> the phones to exhibit a modicum of immunity to RF fields.
> That is why many of the RS phones have been somewhat RFI-resistant.
>
> While not guaranteed against RFI, most of the time, when a
> customer returns a RS product, it is taken back with no
> questions asked.
>
> 73,
> Ed Hare, W1RFI
> ARRL Lab
> 225 Main St
> Newington, CT 06111
> Tel: 860-594-0318
> Internet: w1rfi@arrl.org
> Web: http://www.arrl.org/tis
>
>
>
> > -----Original Message-----
> > From: Edward F. Douglass [mailto:douglass@dcwis.com]
> > Sent: Sunday, December 01, 2002 10:54 AM
> > To: rfi@contesting.com
> > Subject: [RFI] RFI resistant telephones
> >
> >
> > I am new to the list. I have read the last few month's
> > "traffic" but have
> > not found a thread dealing with telephone RFI, and
> > RFI-resistant telephones
> > in particular.
> >
> > As part of my diagnosis, I need an RFI-resistant telephone in
> > order to
> > determine if phone company equipment (lightning arrester, RF bypass
> > capacitors, or other devices) are rectifying my transmit RF
> > and putting
> > audio on the phone line.
> >
> > All of my phones are sensitive to RF because in spite of a
> variety of
> > chokes and filters, I hear my SSB audio on every phone. Some
> > are less
> > sensitive than others but they all have objectionable audio
> > on them. Of
> > course, the audio could be coming from phone company
> > equipment or faults in
> > my phone wiring as well as my own phones. If either of these
> > happening, no
> > amount of filtering or choking will solve the interference problem.
> >
> > The ARRL RFI tech site mentions the Radio Shack ET-171 as a
> > phone that is
> > pretty resistant to RF. However, my Radio Shack catalog no
> > longer lists
> > this model.
> >
> > I am aware of the "bullet proof" phones from TCE
> Laboratories and Pro
> > Distributors but they cost $80. I would like to find a less
> > expensive test
> > instrument.
> >
> > Can anyone recommend a phone that I could buy at a WalMart,
> > Target, Radio
> > Shack store (or similar) that is RF resistant? Please
> > specify make and
> > model.
> >
> > Or does someone have an RF resistant instrument that I could
> > borrow for
> > testing purposes? I would be willing to pay shipping both ways.
> >
> > Finally, has anyone found that re-wiring their residential
> > phone system
> > with Category 5e data cable has made a significant
> > improvement in RF pickup
> > to make the cost and effort worth while?
> >
> > 73 de Ed, AA9OZ
> >
> >
> > _______________________________________________
> > RFI mailing list
> > RFI@contesting.com
> > http://lists.contesting.com/mailman/listinfo/rfi
> >
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