tag:blogger.com,1999:blog-6568915967186844196.post4584519731438680684..comments2024-03-26T14:19:33.332-07:00Comments on Bench Grass: Postblogging February 1943, I, Technical Appendix: One-Adam-Twelve, Where Are You?Erik Lundhttp://www.blogger.com/profile/05728486209757153685noreply@blogger.comBlogger8125tag:blogger.com,1999:blog-6568915967186844196.post-2551428015108581302014-03-21T11:43:30.699-07:002014-03-21T11:43:30.699-07:00I don't have documents to hand, but I do have ...I don't have documents to hand, but I do have Joan Beaumont, <i>Comrades in Arms:British Aid to Russia, 1941–45</i> (London: Davis–Poynter, 1980). Beamont lists the overall totals of British signals equipment send over, 1941--46: 1474 radars, 4,3338 radios, 43,000 valves, 850 radio test equipment items, 160 charging and generating sets,30,000 miles of telephone cable (big number, but the US sent over a million), 2000 telephones, 400 10-line switchboards and 60 40-line.<br /><br />I am particularly interested in the nature of the cable, which Beaumont does not explore. In his 1938 address to the IEE, the head of the GPO, Sir George Lee (“Inaugural Address," <i>J. Inst. Elec. Eng.</i> 82 (1938): 1-9, "Trends in Telephony") puts heavy emphasis on the new "main trunk" line: <br />[Begin paraphrase here]<br />On a more tentative basis are the recent advances with carrier on cable, made possible by the negative feed-back repeater. We also have the “so-called 12 channel system,” carried on cable pairs at frequency up to 60 kHz. (3-4). That is, up to 12 channels of voice communication can be carried at different frequencies on the same pair of copper wires. There is some thought that this might be used for television signal as well. (Among other advantages this approach reduces the load on cable manufacturers(!) (4) Coax is going ahead, but is limited by its high cost. The emphasis right now is on a north-south trunk line from London through the industrial Midlands to Liverpool, and perhaps later extended to Glasgow and Edinburgh. It is hoped that this system will definitely carry TV signal.<br />[End paraphrase]<br /><br />I've included some extraneous material here getting to the meat of the subject, the main trunk coax, and probably stripping out the context of Lee's discussion and combining subjects that do not have much to do with each other. My justification is that the slow adoption of coaxial cable had much to do with problems at the ends of the cables with signal reflection. The more channels in the cable, the more complicated the attachment points are going to be, so the bigger the cable sent to Russia, the more challenging the electrical engineering. It would be nice to know the details, and, given archival work, it probably can be.Erik Lundhttps://www.blogger.com/profile/05728486209757153685noreply@blogger.comtag:blogger.com,1999:blog-6568915967186844196.post-89398272421933268772014-03-21T07:51:36.998-07:002014-03-21T07:51:36.998-07:00Document! http://lend-lease.airforce.ru/english/do...Document! http://lend-lease.airforce.ru/english/documents/index.htm<br /><br />although nothing about UK or Canadian supply.Alexhttps://www.blogger.com/profile/17153530634675543954noreply@blogger.comtag:blogger.com,1999:blog-6568915967186844196.post-82781582910852875732014-03-20T12:18:56.025-07:002014-03-20T12:18:56.025-07:00The weird thing is that Canada pumped out Valentin...The weird thing is that Canada pumped out Valentine tanks by the thousands for the Red Army, each equipped with a Canadian-made Type 18. Valentine-equipped units would have been, at least by comparison with the general standard of Red Army units, this deep network of mobile C3R. <br /><br />One would expect to see, for example, heavier German casualties when facing Valentine-equipped units, not because the tanks were particularly useful, but because there was a synergy with the artillery. (And infantry.) Is that what happened? Someone should study it!<br /><br />Of course, the aid protocols also note large deliveries of radios and especially cable. I might be placing far too much weight on improvised means of improving Red Army C3R when direct and dedicated communication supplies were more important.Erik Lundhttps://www.blogger.com/profile/05728486209757153685noreply@blogger.comtag:blogger.com,1999:blog-6568915967186844196.post-38664835663548282232014-03-20T12:09:27.908-07:002014-03-20T12:09:27.908-07:00Which downloads fine, at least for me.
Thank you!...Which downloads fine, at least for me.<br /><br />Thank you!Graydonhttps://www.blogger.com/profile/09839374676813519438noreply@blogger.comtag:blogger.com,1999:blog-6568915967186844196.post-11231479759626104682014-03-20T09:07:44.922-07:002014-03-20T09:07:44.922-07:00You may mock, but the Daimler Armoured Car was pre...You may mock, but the Daimler Armoured Car was pretty sweet.<br /><br />Anyway, I do wonder about the impact of all the radios we sent to the USSR (one of the biggest categories of supply, IIRC, by count and certainly by value, although doubtless not by weight or volume). A lot of the operational and tactical transformation the Red Army had to accomplish involved much more radio.Alexhttps://www.blogger.com/profile/17153530634675543954noreply@blogger.comtag:blogger.com,1999:blog-6568915967186844196.post-88325104449367419522014-03-18T12:13:06.139-07:002014-03-18T12:13:06.139-07:00And now that I've had breakfast, the book is G...And now that I've had breakfast, the book is Gilbert and Finnegan, <i>U. S. Army Signals Intelligence in the Second World War</i>, and the link is: http://www.history.army.mil/html/books/070/70-43/CMH_Pub_70-43.pdfErik Lundhttps://www.blogger.com/profile/05728486209757153685noreply@blogger.comtag:blogger.com,1999:blog-6568915967186844196.post-29163550543827026302014-03-18T09:36:10.694-07:002014-03-18T09:36:10.694-07:00Oops. It turns out that it is to Matloff, Strategi...Oops. It turns out that it is to Matloff, <i>Strategic Planning for Coalition Wafare</i>. So the answer is, neither. It occurred to me as I wrote that I had not checked whether the Signal Corps volumes of the official history had been digitised at Hyperwar yet. (They have not been.)<br /><br />It did not occur to me, because I was rushed, that I had dumped the site that promised me a pdf of the Signals Corps ELINT interception programmes that wouldn't download. That's because I'm happy to concede the intelligence war field to others.<br /><br />Erik Lundhttps://www.blogger.com/profile/05728486209757153685noreply@blogger.comtag:blogger.com,1999:blog-6568915967186844196.post-13062794559825840452014-03-17T21:31:00.912-07:002014-03-17T21:31:00.912-07:00Is the link to the Green Book you could get, or yo...Is the link to the Green Book you could get, or you couldn't?Graydonhttps://www.blogger.com/profile/09839374676813519438noreply@blogger.com