sundance-communications.com/forum Forums Wiring - Telecom Carriers - Trunks & Services Security, Alarms and Paging viking hf2wc buzz

hi guys i have a customer with a viking hf-2wc talk back paging amp. was working ok and they called saying it isnt working. i am using a co port. i can hear a loud buzz on it when i go off hook on the page port. when i disconnect the spker leads at the viking unit the noise goes away. the horn is in a ahop about 15 feet away and is fed by 6 pair drop cable. i disconnect at the spkr end and still have the hum. tried another pair and still have the hum. it runs about 12 feet high from building to building and i cant see any damage to the cable. any ideas on this. thanks dave

Take the horn and connect to the amp.
Work yes= cable bad.

Work no= could be bad horn or amp. Try known working horn.

I cable is not outside rated cable it could look fine but be filled with moisture.

i had outside drop line going out there. viking said try cat 5 so i did and it seems to be working ok. they said it sounded like the cable was picking interferance. who knows but at least it working now. thanks dave

Ah, yes. The old technical support mantra:

Try Cat5 to fix anything.

Don't bother to use a meter, scope, parts substitution, logic, intelligence, electrical theory, common sense, or experience.

Glad it worked out well for you. You were lucky, this time.

I wonder what might have happened had you substituted Cat 3 cable? Or just a piece of quad?

Or if you had just connected the speaker right at the unit, bypassing the cable which appears to be bad.

Carl