GRC-106 Online Resources ------------------------ http://vk2bv.org/archive/museum/grc106.htm Kurrajong radio museum http://www.prc68.com/I/GRC106.shtml GRC-106 Radio System http://www.hilltoparmyradios.com/manuals%20page.html http://www.hilltoparmyradios.com/grc-106.html http://armyradio.com/GRC-106-400W-SSB-Synthesized-HF-Transmitter---Receiver.html http://www.fairradio.com/ http://www.fairradio.com/catalog.php?mode=view&categoryid=166 parts http://www.ac6v.com/ http://www.rasigs.com/htm_pages/radios_grc_106.htm Royal Australian Signals Assn. http://rattrig.com/Documents%20&%20Manuals/GRC-106/The%20ANGRC-106%20Repairs.pdf The AN/GRC-106 History, characteristics and maintenance http://www.greenradio.de/e_grc106.htm http://radionerds.com/index.php/AN~GRC-106 http://www.radiomuseum.org/r/military_grc_106a_hf_radio_set_rt834_am3349.html http://amfone.net/Amforum/index.php?topic=3722.0;wap2 A bit of history. http://www.remlr.com/S3ffr.html https://www.american-milspec.com/p-107-mt-3140grc-106-radio-base.aspx http://www.armyradio.co.uk/arsc/customer/product.php?productid=1630&cat=0&page=9 20160421 http://www.ebay.com.au/itm/Crystal-filter-LSB-1750-KHz-Fit-PRC-74-GRC-106-/222024334855?hash=item33b1ae7e07:g:u3IAAOSwe7BWwPDs Crystal filter LSB 1750 KHz, Fit: PRC-74, GRC-106 Price: C $48.00 seller: crb5000 Crystal Filter LSB, 1.750 MHz . Made by C.R. Snelgrove Company, # 246-730014-001, 1" x 2-13/16" x 1" H. Fit all GRC-106 and PRC-74 Series radio (Was use in CH-150, Canadian Marconi Transceiver). NOS. Center Frequency : 1.7515 MHz 6 dB pass bandwidth : 2.35 KHz 60 dB stop Bandwidth: 5.0 KHz Inband Ripple: 1dB Max Ultimate attenuation: >60 dB Insertion loss: 5 dB max Terminal Impedance : Input: 50 ohms, Output: 500 Ohms Spurious attenuation: >45 dB 4 Poles https://dragtimes.com/parts/Military-radio-working-grc106-with-all-accessories-complete-WORKING_140747836237.html Please note: the grc106 set requires the operator to follow the proper startup and shutdown procedures to avoid damaging the unit. Operator error is the biggest plaque of these units and the manual is not telling a lie when it says to follow the set procedures for operation. I cannot express this point strongly enough. That is why you almost never find operational 106 sets for sale on or for that matter, anywhere else. ===================================== GRC-106 Manuals, by origin From http://rattrig.com/manuals/tm's.htm : To aid in manual selection, it helps to know the numbering system. The older manuals were only a few digits and these contained all the information on the equipment. Later, the manuals were broken down by "user", which is the suffix. While not always correct, I offer a Manual Suffix Key: "10" is Operator; "12", "13", "14" and 15" is a Combination Manual and often a Complete Manual and may be the only one issued, "20" is Organizational Maintenance, "24","34" and "40" is General Support and/or Intermediate Support Maintenance", "35" is Depot Maintenance. Most any of the above can be followed by a "P" which is parts allocated at that level. The many later TM’s, concerned with single pieces of equipment, like “TM 9-1005-223-12”. The first number refers to the branch. The number “9” means that it is an Ordnance branch document. The second series of numbers refer to the subject type. The third series refers to the particular piece of equipment or subject. The forth series on numbers refer to the level of maintenance which the manual is concerned with. With “10-12” being operator and organizational maintenance level, and with higher numbers concerned with a higher level, 20’s being direct support, 30’s being general support. http://www.tuberadio.com/robinson/Manuals/ GRA-50 Antenna TM 11-5280-467-15 (4 Mb) GRC-106 HF transceiver Operators TM 11-580-520-10 (14.6 Mb) GRC-106 HF transceiver Organization TM 11-5820-529-12 (21 Mb) GRC-106 HF transceiver Description EMER H172 (44 Mb) Incl full schematics GRC-106 HF transceiver Base Repair EMER H174 (40 Mb) GRC-106 HF transceiver Special Tools TM 11-5820-520-12 (3.3 Mb) GRC-106 HF transceiver Maintenance TM 11-5820-520-12 (18 Mb) The H172 & H174 volumes are Australian Dept of Defense publications. Includes FULL SCHEMATICS and service proceedures to component level. These volumes were scanned in 2014, the first time these have been publicly available. H172/H174 do not mention the small noise suppression PCBs next to the Antenna input on the front panel. http://rattrig.com/manuals/tm's.htm AN/GRC-106 TM's TM 11-5820-520-35 1966 TM11-5820-520-35 1966.pdf 150MB INCL FULL SCHEMATICS. (as single sheets) TM 11-5820-520-34 1990 TM 11-5820-520-34 1972 TM 11-5820-520-10 TM 11-5820-520-20P TM 11-5820-520-20P-1 TM 11-5820-520-20P-2 TM 11-5820-520-34P Common '106 Problems & Repairs The ANGRC-106 Repairs.pdf 438KB Very useful, incl service extension cables. AM-3349 Amp Schematic AN-GRC-106 Amp Overall.TIF 1.2MB http://www.hilltoparmyradios.com/grc-106%20info%20page.html http://www.hilltoparmyradios.com/manuals%20page.html Manuals from Hilltop - AN/GRC-106 and AN/GRC-106A Radios (for both versions of the GRC-106) TM 11-5820-520-10 Operators' Manual TM 11-5820-520-12-HR Hand Receipt Manual TM 11-5820-520-20 Organizational Maintenance Manual TM 11-5820-520-20-P-1Org Maintenance Repair and Sp Tools GRC-106 TM 11-5820-520-20-P-2 Org Maintenance Repair and Sp Tools GRC-106A TM 11-5820-520-34 Direct Support and General Support Maint Manual TM 11-5820-520-34-P-1 Direct Support and General Support Maint Manual Parts and Sp Tools GRC-106 TM 11-5820-520-34-P-2 Direct Support and General Support Maint Manual Parts and Sp Tools GRC-106A http://www.ko4bb.com/manuals/index.php?dir=08)_Misc_Ham_Equipment/GRC_106 depot mtce PDF 26 Mb full mtce manual PDF 39 Mb op manual PDF 4.2 Mb ops & mtc manual PDF 7.0 Mb school of coms PDF 2.1 Mb http://dev.n8it.org/acs/radios/grc-106.htm Operators manual http://dev.n8it.org/acs/documents/TM-11-5820-520-10%20GRC-106%20operators.pdf 1.8 MB Maintenance manual part 1 http://dev.n8it.org/acs/documents/TM-11-5820-520-34%20GRC-106.pdf 9.5 MB Maintenance manual part 2 http://dev.n8it.org/acs/documents/TM-11-5820-520-34P-1%20GRC-106.pdf 3.7 MB http://bama.edebris.com/manuals/military/an-grc-106/