Telephone Tone and Probe

Brooke Clarke 2013

Background
    Bell System Test Set 139B
   Bell System AT-8629 Banana Test Probe
    Progressive 77HP Toner "The Tracer"
    Progressive 200ES
Related Telephone & Test Equipment
Links


Tone Generators
Test Probes
Bell System Test Set 139B
Bell System 139B
                Test Set
Bell System AT-8629 Banana Test Probe
Bell System
                AT-8629 Banana Test Probe
Progressive 77HP Toner "The Tracer"
Progressive 77HP
                Toner "The Tracer"
Progressive 200ES Probe
Progressive
                200ES Tone Probe


 

Background

When working with phone wiring it's common that there are a number of pairs and you want to know which one connects to a line or phone.  Putting a tone on the line in question and then seeing which pair carries the tone is a good way to do this.  But that would require spending a lot of time connecting a but set to all the possible pairs and if there were a hundred pairs that could take some time.  So, by using a non contact probe the time to find the pair with tone can be accomplished in seconds.

Bell System Test Set 139B

Described in BSP 105-242-100 (2 Nov 1974).
Uses 2 AA batteries.
Note:  When tone is applied to the two wires of a pair the twist works to minimize radiation of the tone.  To maximize tone strength for use with test probes it's best to apply to one wire of a pair and something other than the other side of the same pair (such as ground, other pairs etc.).

Switch Positions:

OFF

TONE

TALK


Bell System 139B
                Test Set

Bell System 139B
                Test Set

Bell System 139B
                Test Set
Use KS14368 or Equivalent 1.5V Batteries. 
CAUTION: See BSP-105-242-100 on use of Alkaline Batteries.




Bell System AT-8629 Banana Test Probe

Described in BSP 105-241-100 (5 Jan 1976).
Uses 206 cylindrical 9 Volt battery (Equivalent to: Mallory TR-126, NEDA 1611, H-7D, H-6D  50.8 x 18.6 mm)
The probe requires a tone source in the range of 500 to 1200 Hz such as 76-type, KS-16900, 81A, 139A, 145A or a central office 1000 Hz tone.  The tone can be applied at the CO or locally.


AT-8629 Banana Probe
Bell System
                  AT-8629 Banana Test Probe
Dead 206 9 Volt cylindrical battery.  Equivalent to: Mallory TR-126, NEDA 1611, H-7D, H-6D  50.8 x 18.6 mm
It may be that a stack of 625 button cells will work to replace this obsolete battery.  On order 24 Sep 2013 . .
Bell System
                  AT-8629 Banana Test Probe
Printed Circuit Board pushed out of metal cylinder (black wire broken)
Bell System
                  AT-8629 Banana Test Probe
This is a capacitive input high impedance probe.
Bell System
                  AT-8629 Banana Test Probe



Progressive 77HP Toner "The Tracer"

This is a modern and smaller version of the Bell System 139B, but without all the test capabilities of the 139B.
Uses standard 9 V battery.

Progressive 77HP Toner "The Tracer" Progressive 77HP Toner "The Tracer"


Progressive 200ES

This inductive tone probe has a self contained speaker and volume control.  Push to turn on, release to turn off button.
At the top there are a couple of terminals in parallel with the speaker wiring to allow connecting a handset.
This probe will detect 60 Hz AC mains hum.

Progressive 200ES Tone Probe Progressive 200ES Tone Probe


Related Telephone & Test Equipment

Phones -
Bell System 302 Dial Phone -
Bell System 500 Dial Phone -
Bell system 2500 Touch Tone phone -
EE-8 Telephone Set
Fullerphones
KY-68 Secure Field Telephone
KX-TA824 Panasonic Phone System up to 8 incoming lines & 24 extensions, supports dial phones
TA-1 Sound Powered Telephone Set
TA-312/PT Telephone Set  (Field Phone)
TA-341/TT
TA-838/TT Telephone Set
TA-1042  Digital Non-Secure Voice Terminal (DNVT)
TG-5-B Telegraph Set
Western Electric 202 Dial phone-
VOIP - Voice Over Internet Protocol (free domestic phone)

Test Equipment
HP 4395A Network Analyzer with the HP 4380S CAT 5 Cable test System
Telephone Tool Kit
KS-8455L2 -  lineman's test set
MK-356/G Wire Splicing Kit - missing the splices.
ZM-4B/U Resistance Bridge
Others
Telephone Poles
SB-22A  Switchboard
GRA-39 Radio Set Remote
Z Impedance
Z0 - transmission line impedance including CAT5 and Open wire

Telephone Patents -
Telegraph Equipment -
Leclanche Wet Cell Batteries -

Links

Back to Brooke's Products for Sale, PRC-68, Alphabetical Index of web pages, Home web page

Page created 13 Sep 2013.