REF ID:A105053 

··--. 

•aJor R. R. Range~, Sig. Ree., 

President, Re.ngertone, Ino., 

201 Verona Av&nue, 

New•rk,, New Jeree-,. 

Dear Major nang&ra 

•~ember 22, 1937 

In reaponae to 701.tr letter of November 17, I look forward 

to seeing you h$r& this coming Friday. I have u.d.e inquiry and have 

aeoertained that th~ Chief Signo.l Officer expects to be here and 

will be interested in seeing the demonet~ation and talking with you. 

Anticip•ting s pleauant v1!1t, I am1 

Sincerely yours, 

Willia• F. 'P'riedman. 

@'pp roved for Release by NSA on 09-11-2013 pursuantto E .0. 1352a 

_____ ,........,... 
HUMBOL.DT 

2·0123 

e REF ID:A105051t 

R.i\NG ERTOlo.TE, INC~ a ELECTIHC·]~'\USIC 

NoYember 17, 1937 

Col. William F. Friedman 

Office of the Chief Signal Officer 

Washington, b.c. 

Dear Col. Friedman: 

I am planning to come do~n with the recording equipment Friday after Thanksgiving, the twenty- sixth. Will this be a convenient time for you and will the C. S. 0 be available too? 

I would stay Saturday too, of course. 

Yours very sincerely, 

201 VERONA AVE. 

NEWARK. N. J. 
• REF Il) : Al 0 5 o--... r~~ 1kc:. I I lfq 

8 

November 8, 1937 

Major R. B. Ranger, Sig. ~es.~ 

President, Rangertone, Inc., 

201 Veron..~ Avenue, · Newark, New Jersey. 

Dear ~aJor R~nger: 

l have your£ cf November 5, which interested me a great 

deal. Naturally I regret tho fact that the text of th~ general 

plan gave negativ~ .results but I 8=Ill very glad that .it has led to 

eJC!)eriments which e;eeo to have provided more intere~ting data. We 

will, of course, oo very 1.'l.uch .ir.1tere:?.tad ir, seeing what you have 

developed and she.ll lcok ·forward to a. visit by you within the near 

future. I do not anticipa.te coming by Newark within the next two 

or three weeks, so tha. t I can not take advantage ot your invitation 

to eee the apparatus at yam- plant. I take it that what you have 

is in connection. with the. enc!pherment of voice rather than straight 

telegraph im?Ulses or aimpla eudio-frequenay impulses. 

Please let me know a couple of days in advance of your 

impending visit. Thanking you very much, 

Sincerely yours, 

William F. Friedman. 
HUMBOLDT 

2·0123 

e REF ID:A105053e 

["'1\NG ERTONE,INc. 

d ELECTIHC-l'lus1c 

Nov. 5, 1937 

Colonel William F. Friedman 

Office of the Chief Signal Officer 

Washington, D.C. 

Dear Colonel Friedman: 

201 VERONA AVE. 

NEWARK, N, J. 

At last I am back on the job although the cold does seem to hang 

on somewhat. 

We tested out your general plan and found it extremely difficult 

to accomplish due to the fact that the accuracy of movement would 

have to be such as to keep at least a thousand cycle note in phase in order to be able to balance it out. We finally gave up trying 

to do it with voice and tried straight audio oscillators. This 

proves to be an excellent means of detecting the wow in the speed of the equipment out I am afraid that the finesse with which the 

equipment would have to be built in order to accomplish the purpose 

you had in mind makes it ratlherimpractical. However, this very difficulty is something that V\·ould make the casual listener find 

it impossible to decipher. It would also be necessary to be very careful of the phase in all of the amplification work as any phase shift would prevent its operating. 

In line with your main objective, however, we have gone ahead and 

realized something which may be of real interest to you and I will 

plan to bring it do~n to show you at the first opportunity and at 

the same time, as you suggest, we can show the Chief Signal Officer 

just what we can do in the way of recording. I am afraid it will 

be impossible to do this within the next two weeks. I will, however, 

try to work it in at the first opportunity and of course, if you 

get up this way, we will be very glad to show it to you here. 

No doubt you will find that it is more readily deciphered than you would like it but there are enough permutations and combinations 

so that I would think that your great facility in having various 

ciphering and deciphering arrangements ~hich make use of such 

variables, something very practical could be worked out ~hich would 

not be at all too complicated. It involves, of course, the time 

element in recording and the effect is certainly startling when you throw from the straight playback to the deciphering playback. 

Does this sound interesting to you? 

RHR:DMB 
REF ID:A105053 

.. c . ...... C &igtml mtirs. '.lttttth btta Ly 

War Department Meaaage Center, 

&trinrb nt ~~.~'.1'"'" eund1ng, ~ES!~~~- ~~ION _TE~E<lRA~H~~· , v. •· •or .... .-r 1&1111m onza • .1111 

WlLL' I AM F FR I EDM AN"i OFF I CE OF THE CH I EF SIGNAL OFF I CE R= -~-z:a.....,i::i::~~.'~-..-. . _-M _:--:.?-: ·...: -- - . -- - . ·:__ ·--· - ~ 

PERSISTENT COLD PRECENTS COMING TODAY WILL ADVtSE 

WHEN CAN COME= 

-R H RANGER~ 1146A 

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. \ ' .. : . 
HUMBOLDT 

2·0123 

e REF ID:A105053e 

&"\NG ERTONE, INC. 

d ELECTRIC-1\'lusrc 

Sept. 29, 1 9 3 7 

Mr. William F. F'riedman 

Off ice of the Chief Signal Officer 

War Department Washington, D.C. 

Dear Mr. Friedman: 

I will plan to be in Washington Monday 

as you suggest at which time I will bave 

the chance to go into things more completely. 

.. Yours. sincerely, 

RER:DMB 

201 VERONA AVE. 

NEWARK, N. J, 
, HUMBOLDT 

2-0123 

• REF ID:AlOSit.3 ~ 

&"'\NcmRTONE,INC. 

d EI..ECTruc-l"lusrc 

Sept. 23, 1 9 3 7 

Mr. William F. Friedman 

Off ice of the Chief Signal Officer 

War Department !¥~.~h~ngton, D. C. 

Dear Mr. Friedman: 

In regard to my coming down next Friday, could you just find out informally whether 

Colonel Olmstead will be in his office 

next Friday? I want to drop in to see him 

without making too much of a point of it. 

If he is not going to be in Friday, but will 

be on Thursday or Saturday, let me kn.ow and 

I will change my plans accordingly. 

Many thanks. 

RBR:DMB 

201 VERONA AVE. 

NEWARK. N. J, 
REF ID:A105053 

Major R. H. Ranger, Sig. Rea., 

201 Verona Avenue, 

lewark* lew Jers•J• 

Dear lajor .Rs.ngera 

8 

September 24. 1937 

leaeipt of your letter of September 22 is acknowledged. 

I note that you now pl.en to come to l'aehington on the 

tirst ot October. It happens unfortunetely thut I 11uat Jil8.ke a 

trip to Fort tionmouth to b& there on September .30. While I could, 

or course, be back here in ti11e to seo 7ou. I bad hoped to be able 

to spend the week end with my .t'olks in lew York. I.t possible~ 

theratore, could you Postpone your visit to Monday, October 3d? 

I u hoping thet the teats :you have made on the repording 

scheme hl".ve produced some interesting results aml a• lookilli for-

•a.rd to aeeilli what )OU have accomplished. 

Reciprocatin& 7our good wishes, I .. , 

Bince:rely youre, 

William F. ll'riedma.n. 
HUMBOLDT 

2·0123 

REF ID:AlOSOli 

&'"\NG ERTONE, INc. 

d Er..ECTRrc-1\\.usro 

Sept. 22, 1 9 3 7 

201 VERONA AVE. 

Mr. William. F. Friedman 

War Department Office of the Chief Signal Officer 

Washington, D.C. 

Dear Mr. Friedman: 

I am planning to come down to Washington Friday the first of October and I will bring with me 

some results that we have obtained on the recording scheme. I will also bring along a little 

playback unit so we may actually try it out in 

your oi'fice. 

With all good wishes, I am 

RBR:DMB 

NEWARK. N. J. 
'Major R. H. R1•nger, 

201 Verona Avenue, 

Hew&rk, law ~erpoy. 

Dear Rangers 

REF ID:A105053 

8 

September 17, 1937 

Have ) ou had a chance to try out 1; ny exper111ents yet with the 

acetate tr.pa recording scheme which wa discusEed on t.lie occasion or 

your visit here the latter part of July? I will be very glad to 

have a word or t~o from you 1n1icating what you think about the pro- poe~l at the present time. 

lfi th very best reg::-rds, 

Sincerely yours~ 

.. 

· ..... 

William F. FriedE1an. 

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