Rangie Posted January 7, 2015 Share Posted January 7, 2015 Hi Folks, Regarding the PTC-404 field telephones. I've used them as a pair, was wondering if it was possible to daisy chain/loop/star them? I dont have any literature on them, does anyone have references /EMERs for them (and 405s) ? Alec Quote Link to comment Share on other sites More sharing options...
fv1609 Posted January 7, 2015 Share Posted January 7, 2015 No EMERs Alec they are in AESPs: 5805-J-201-101 Telephone Set 2 Wire UK/PTC/404. Purpose & Planning Information. Nov.1979 5805-J-201-201 Telephone Set 2 Wire UK/PTC/404. Operating Information. Nov.1979 5805-J-200-302 Telephone Set 2 Wire UK/PTC/404. Technical Description. June 1979 5805-J-200-512 Telephone Set 2 Wire UK/PTC/404. Maintenance information & instructions. Dec.1979 5805-J-200-811 Telephone Set 2 Wire UK/PTC/404. General Instruction No.1 & Modification No.2 5805-J-201-201 Telephone Set 2 Wire UK/PTC/405. Operating Information 5805-J-201-302 Telephone Set 2 Wire UK/PTC/405. Technical Description. Dec.1980 5805-J-201-512 Telephone Set 2 Wire UK/PTC/405. Maintenance Information & Instructions. Dec.1980 5805-J-201-601 Telephone Set 2 Wire UK/PTC/405. Maintenance Schedule. Dec.1980 5805-J-201-712 Telephone Set 2 Wire UK/PTC/405. Illustrated Parts Catalogue. Sep.1980 I've got these stored somewhere but can't find them other than the last 3 on the list. Quote Link to comment Share on other sites More sharing options...
Rangie Posted January 7, 2015 Author Share Posted January 7, 2015 Thanks Clive, that's a great start! Alec Quote Link to comment Share on other sites More sharing options...
Chris Suslowicz Posted January 7, 2015 Share Posted January 7, 2015 Hi Folks, Regarding the PTC-404 field telephones. I've used them as a pair, was wondering if it was possible to daisy chain/loop/star them? I dont have any literature on them, does anyone have references /EMERs for them (and 405s) ? Alec I've had a quick look through the operator guide for the 404 and it doesn't say anything about using them for anything other than point to point (another phone or an exchange). On the other hand, "bus" circuits for field telephones have a very long tradition and I'd be very surprised if you couldn't run four or five instruments on the same D10 pair. The limiting factor will be load on the ringer, making it impossible to call the other instruments or audio level too low in the receiver. A quick rummage at Infantry Signal Training, Pam 41 Part 5 (1984) shows the omnibus circuit still being taught, with the PTC-404 for when an exchange is not available (and a system of rings being used to call a particular handset). The diagram shows 4 phones in an omnibus circuit: BN HQ, A, B & C Coys (all in parallel on a single D10 pair). It also notes: United Kingdom Portable Communications 405 (UK/PTC-405) This telephone is a plastic desk set and can be fitted with a dial for use on outside lines. It will not be issued to Infantry battalions but can be found in training depots and similar training establishments. (I think the PTC-404 replaced Telephone Sets J and L, while the PTC-405 replaced the Telephone Set 'F' for office use. The Unit Level Switchboard 16 line was the replacement for the 10-line Magneto switchboard.) Chris. Quote Link to comment Share on other sites More sharing options...
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