Released under the John F. Kennedy Assassination Records Collection Act of 1992 (44 USC 2107 Hote). DATE: 11-14-2017 - JFK Assassination System Date: 6/11/201 , Identification Form $e Agency Information AGENCY: FBI RECORD NUMBER: = 124-10213-10064 RECORD SERIES: HQ AGENCY FILENUMBER: = 92-2781-392 Document Information ORIGINATOR: FBI ‘ FROM: DIRECTOR, FBI ~ TO: SAC, TP TITLE : DATE: = 12/04/1961 “PAGES: 3 SUBJECTS : [Restricted] DOCUMENT TYPE: PAPER, TEXTUAL DOCUMENT CLASSIFICATION: — Secret ’ RESTRICTIONS: 1B CURRENT STATUS: — Redact DATE OF LAST REVIEW: _ 10/09/1998 OPENING CRITERIA: = INDEFINITE ‘ COMMENTS : v9.1 : 17 Docld: 322947385 Page 1
/DATE: tod -2017 an 4 ™~ — < / . ee 4 s | =e ae mee wed |. Adrtel DTHERWISE a iy ity a\ 4 To: SAC, Tampal(86- -aasifyp eh’ f Yale Ya . From: Director, FBI (92-2781) (yg) . lL o L INFORMA 2 F SANTO TRAFFICANTE, JR., aka —_‘HEREI IS Mee a Reference is made to previous correspondence captioned matter and your letter dated 10-30-61, furnishing technical data concerning the possible vO installations of MISUR surveillances in this case and advising that you would set up a simulated test circuit to determine what effects a 3000-ohm resistor across the telephone line will have on telephone service to Joe Diez. “fheSkaborétory has recently developed an{électronic switch/which CON: utilizes. the ‘game principles as described on Pages 188 and 192 of the Hand | \ \ of Technical’ Equipment. The electronic switch has been substituted for the | relay in the,subject's premises. Itis not, however, necessary to break the « \}ine for the ansertion of the special relay as the electronic cwitelf function WU) when bridget across the subscriber's telephon ry i] - Théwpeciak SPMT device using the electronic switching technique ( Ud) i measures 1 1/2" by 74/ 16" by 1/2". Iis complete with a microphone, preamplifier and the electronic switch/and can be connected directly across the (yy, subscriber's telephone line without affecting his telephone service. Tests have | i; _indicated that none of the routine tests made by the telephone company test \ fiortests with ohmmeters will reveal the presence of the ED go> eR- 108 REC A . 7.2, - -J9 az eh ‘ledom the o beyEoncealed 4 the Laboratory, “it was"det go Feniiecdrthat ine | |_.AoSeGial device can bef concealed in the network of the Ai girlie |.| Company Model 80 telephone//: It is not felt at this ne sutomatls ae lopment ni tion two instruments can be/équipped with this device and operated on the.game~~— ECORDED COPY FILED UNEEC cep = Mr. Belmont NOTE: “fampa has authority to. “it, l= Mr, Sullivan (Attn.: Mr. Donohue) _ _—condust MISUR survey on subjects ap Mr. Evans Attn,: Mrs Sheridan)” eens ce \RFMT) =< Wags (Cont® d next page)” os V2 ne Single, Pair Ne Docld: 32294735 Page 2? Released -mider the John F. Keriedy Assassination Records We Act of 1997 (44 usc 2107 Hote). Air ecriber's telephone line. fa Cw: ay on we DEbr apeuee~ vee \y Z in cajtioned ‘cagd. They proposed 4
DATE: 11-14-3017 ; ok o #9 ws ; \ c ; ea Jf? 4! ” : } oS . r [oar under ‘tte John F. Kennedy Assassination Records Come Act of 1997 (44 usc 2107 Hotey AVITIATATEAL . en TAL ¢ Airtel to SAC, Tampa Re: SANTO TRAFFICANTE, JR. _ " 92-2781 | It is noted that there is some concern on the part of the telephone company as to what effect the installation of equipment across the telephone line would have on the ringing of the subscriber's telephone instrument. While the Laboratory has ; no facilities to check the effect on ringing in a system using the frequencies set forth in your letter of 10-30-61, it is felt that the impedance of the unit is sufficiently high that ringing will not be affected. In order that the Laboratory may have a complete diagrammatic layout of the subjects’ services, it is desired that you submit cable prints of the feeder and. _ distribution cables in the areas in close proximity to the subjects' residences as well as the area you propose for a monitoring site or sites. You should ascertain me from sources in the General Telephone Company of Florida, the identity of a ao normally closed ringing relay that will respond to the ringing frequencies of the lines involved and advise the Bureau the source of the relays. In addition, you ‘should ascertain the ringing voltage, talk voltage and operate current for subjects’ telephone service. ~ You will note that emphasis has been placed on/ the use of the telephone. instrument for disguise. You may determine, after a survey, that you. have a ' telephone service outlet which will afford better microphone coverage than the telephone instrument. If such is the case, the electronic switching device can be bridged across the line at the outlet or at any place where security and time permit . concealing the microphone, electronic switch and its associated wires and connect~ ing same to the subject's telephone line.” a . yt ws In the event you are able, through telephone company cooperation or | otherwise, to/substitute a telephone instrument which has been altered to incorporate - the new electronic switching equipment for one now in servicesin subjects'- 7). NOTE: the use: offerte coverage, but Laboratory tests indicate that telephone sets used for subjects. cannot be activated by/RFMT/unit. Tampa next considered A SPMT}type of installation. Laboratory questioned effect of such.a.low value .of juniper "|. resistor, required for this type of installation, would have on ringing of telephones. in : the area. The Laboratory has now developed an electronic switch circuit which should not affect ringing of telephones in the area. For details of electronic switch circuit see memorandum R. L. Millen to-Mr. Conrad/captioned."SPMT ~ Electronic ) . Switching Circuit,|" reas gf) cy oBGRe | ‘® i | DocId: 32294288 Page 3