nagle@well.UUCP (John Nagle) (09/18/89)
I've been receiving two local AM broadcast stations on my Western Electric Model 600 telephone. I fixed the problem by putting a 1000pF capacitor across two terminals within the phone that seemed to work. (Putting it across the phone line didn't help, in fact, a dead short across the phone line turned the phone into a good radio!) This seems a hokey solution to the problem. Is there a more respectable one? John Nagle
waters@darla.sps.mot.com (Strawberry Jammer) (09/18/89)
In article <13681@well.UUCP> nagle@well.UUCP (John Nagle) writes: } } I've been receiving two local AM broadcast stations on my }Western Electric Model 600 telephone. I fixed the problem by }putting a 1000pF capacitor across two terminals within the phone }that seemed to work. (Putting it across the phone line didn't help, }in fact, a dead short across the phone line turned the phone into a }good radio!) This seems a hokey solution to the problem. Is there }a more respectable one? Considering that the problem comes from audio level setting diodes within the telephone set itself I would hardly call your solution "hokey". The only "hokey" thing about it is a manufacturer who blithely assumes that RFI is rare just because it was 50 years ago! So long as the fix and the phone work I would just go on using it! You might try ferrite beads on the wires to the phone as well if the capacitor isn't enough too. *Mike Waters AA4MW/7 waters@dover.sps.mot.com * Take it easy, we're in a hurry.
rsd@sei.cmu.edu (Richard S D'Ippolito) (09/19/89)
In article <13681@well.UUCP> John Nagle asks:
I've been receiving two local AM broadcast stations on my
Western Electric Model 600 telephone. I fixed the problem by
putting a 1000pF capacitor across two terminals within the phone
that seemed to work. (Putting it across the phone line didn't help,
in fact, a dead short across the phone line turned the phone into a
good radio!) This seems a hokey solution to the problem. Is there
a more respectable one?
Hmmm, a fifty-cent solution that works -- what's so unrespectable about that?
Rich
--
It is not the possible that determines what to hope for --
it is hope that determines what is possible.
Richard J. Oman rsd@sei.cmu.edu
-----------------------------------------------------------------------------lsheldon@cup.portal.com (Laurence Larry Sheldon) (09/19/89)
Two general areas to check out-- Corroded, loose, or missing ground connection Corroded, or loose other connections. (That makes up one area) Noisy carbons. (Find the protector--where the teloc wires transition to the house wire. Unless theprotector is very old, it will have what appear to be two large brass screws. You will discover that you can remove them without changing any thing. If you remove them and the radio goes away--the carbons you now have in your hand nead to be replaced. Put them back and complain to the telco.
barry@hprmokg.HP.COM (Barry Fowler) (09/20/89)
nagle@well.UUCP (John Nagle) writes: > I've been receiving two local AM broadcast stations on my >Western Electric Model 600 telephone. I fixed the problem by >putting a 1000pF capacitor across two terminals within the phone >that seemed to work. (Putting it across the phone line didn't help, >in fact, a dead short across the phone line turned the phone into a >good radio!) This seems a hokey solution to the problem. Is there >a more respectable one? > John Nagle Oxidized connections can often form semiconductor junctions that act as detector diodes in the telephone system within your house. Typical connections are located on the outside of your home where the 2 conductor wire forms a junction to your house. The problem, you have fixed puzzles me, however because if the problem were a result of RFI somewhere from the phone, back, the capacitor shouldn't have an effect on the problem since the detected signal wouldn't be shunted by the capacitor. It appears that the RFI is actually being picked up at the telephone itself. To narrow down the possibility, try replacing the offending phone with another to see if the problem goes away. If it does, one of two things is happening. 1.) The phone is experiencing an RF overload. or 2.) There is an oxidized connection within the phone that is detecting the radio signal. Now, time for the AT&T posters to pounce on me..... :-)