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KB2VXA > TECH 06.01.08 21:45l 25 Lines 981 Bytes #999 (0) @ WW
BID : 28606_VK2TV
Read: GUEST OE7FMI
Subj: Re: G8MNY > A ton of batteries
Path: DB0FHN<DB0RGB<DB0PM<DB0PV<DB0FSG<I4UKI<IK2QCA<IW2OHX<OE6XPE<DB0RES<
ON4HU<SR1BSZ<WA7V<KD4YAL<VK2TV
Sent: 080106/1912Z @:VK2TV.#MNC.NSW.AUS.OC #:28606 [Kempsey, QF68JX] $:28606_VK
From: KB2VXA@VK2TV.#MNC.NSW.AUS.OC
To : TECH@WW
Hi John and all,
Well now, that's the backup storage battery at the telephone exchange,
that's why it's called common battery using wet lines as opposed to the
older local battery dry line system. Remember the dry cells in the
battery box at the bottom of those old wooden crank 'em up wall phones?
Now why in the movies do they lift the receiver and then crank when an
off hook condition swamps the magneto? Lassie, LASSIE! Where IS that dog?
I've seen smaller versions of those wet cells on the ground floor of
railway signal towers properly called interlockings that operate the
switches when the AC mains fail, they run on 32VDC. Those I saw were
glass cases on wooden racks, acid spatter would quickly destroy steel and
I usually saw one or more cells "boiling" under charge.
73 de Warren
Station powered by JCP&L atomic energy, operator powered by natural gas.
Message timed by NIST: 19:12 on 2008-Jan-06 GMT
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