Menu
Forums
New posts
Search forums
What's new
New posts
New profile posts
Latest activity
Vault
Time Travel Schematics
T.E.C. Time Archive
The Why Files
Have You Seen...?
Chronovisor
TimeTravelForum.tk
TimeTravelForum.net
ParanormalNetwork.net
Paranormalis.com
ConspiracyCafe.net
Streams
Live streams
Featured streams
Multi-Viewer
Members
Current visitors
New profile posts
Search profile posts
Log in
Register
What's new
Search
Search
Search titles only
By:
New posts
Search forums
Menu
Log in
Register
Navigation
Install the app
Install
More options
Contact us
Close Menu
Forums
Time Travel Forum
Time Machines & Experiments
The Secret Time Travel Experiments of Nikola Tesla
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Reply to thread
Message
<blockquote data-quote="Opmmur" data-source="post: 137461" data-attributes="member: 13"><p><span style="font-size: 26px"><span style="color: #00ff00"><strong><em>National AN/FRR-24, AN/FRR-37, AN/FRR-42, AN/FRR-43, and AN/FRR-10 receivers</em></strong></span></span></p><p> </p><p>If you have one of these monsters, or any pieces of one, <a href="mailto:nick@virhistory.com"><u>please send me e-mail</u></a> - I have acquired almost all the modules and cables to <a href="http://www.navy-radio.com/rcvrs/frr24/frr24-rest-01.htm" target="_blank"><u> assemble a system</u></a> and would like to acquire some additional pieces and information. I also have some spare modules to trade. I'd also like to correspond with other FRR-24, FRR-37, or FRR-10 owners as I start assembling and testing mine. I'd really like to hear from anyone who has photos or knows how & where these systems were used by the US Navy.</p><p></p><ul> <li data-xf-list-type="ul"><a href="http://www.navy-radio.com/rcvrs/frr24/frr24-config.htm" target="_blank"><u>AN/FRR-24 System Configuration</u></a></li> <li data-xf-list-type="ul"><a href="http://www.navy-radio.com/rcvrs/frr24/frr37-config.htm" target="_blank"><u>AN/FRR-37 System Configuration</u></a></li> <li data-xf-list-type="ul"><a href="http://www.navy-radio.com/rcvrs/frr24/frr10-config.htm" target="_blank"><u>AN/FRR-10 System Configuration</u></a></li> <li data-xf-list-type="ul"><a href="http://www.navy-radio.com/rcvrs/frr24/frr24-rest-01.htm" target="_blank"><u>My Restoration Project</u></a></li> <li data-xf-list-type="ul"><a href="http://www.navy-radio.com/want-1.htm" target="_blank"><u>Wanted Items - page 1</u></a></li> <li data-xf-list-type="ul"><a href="http://www.navy-radio.com/want-2.htm" target="_blank"><u>Wanted Items - page 2</u></a></li> <li data-xf-list-type="ul"><a href="http://www.navy-radio.com/want-3.htm" target="_blank"><u>Wanted Items - page 3</u></a></li> <li data-xf-list-type="ul"><strong>Main Web Site - </strong><a href="http://www.navy-radio.com/index.htm" target="_blank"><strong><u>1950's-60's Navy Radio</u></strong></a></li> </ul><p> <a href="http://www.navy-radio.com/rcvrs/frr24/nat-ad-1953-01.JPG" target="_blank"><img src="http://www.navy-radio.com/rcvrs/frr24/nat-ad-1953-01_small.JPG" alt="" class="fr-fic fr-dii fr-draggable " style="" /></a></p><p><em> Photo thanks to <a href="http://k1kgg.net/vintageradio.html" target="_blank"><u>K1KGG</u></a></em></p><p><a href="http://www.navy-radio.com/rcvrs/frr24/frr24-03.jpg" target="_blank"><u><img src="http://www.navy-radio.com/rcvrs/frr24/frr24-03_small.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></u></a></p><p>National Company logo at top of rack</p><p><span style="font-size: 18px"><strong>AN/FRR-24 Triple-diversity HF AM/CW/FSK Receiver</strong></span></p><p style="text-align: right"><span style="font-size: 18px"><strong><a href="http://www.navy-radio.com/rcvrs/frr24/frr24-sys-01.JPG" target="_blank"><img src="http://www.navy-radio.com/rcvrs/frr24/frr24-sys-01_small.JPG" alt="" class="fr-fic fr-dii fr-draggable " style="" /></a></strong></span></p><p><span style="font-size: 18px"><strong> System </strong></span></p><p><span style="font-size: 15px"><strong><a href="http://www.navy-radio.com/rcvrs/frr24/frr24-config.htm" target="_blank"><u>AN/FRR-24 System Configuration</u></a></strong></span></p><p>The AN/FRR-24 (pictured at right) is a triple diversity dual-conversion HF (2-32 Mc.) receiver made by the National Co. (Malden, Mass.) around 1950. It was primarily designed for shore station teletype circuits. The operator's handbook 91580.2 and maintenance handbook 91580.3 that I have are dated 1952. The complete manual is NAVSHIPS 91580.</p><p></p><p>Procured under contract NObsr-39402 (30 June 1947) for $60,260 ea.</p><p></p><p>The AN/FRR-24 consists of 4 racks weighing a total of 3,121 lbs. Racks 1, 2, and 3 contain essentially identical receiver assemblies. Each receiver rack has 4 RF tuning modules (2-4mc, 4-8mc, 8-16mc, 16-32mc). Each receiver rack also has a detector/AF unit for monitoring purposes. IF selectivity can be set from 18kc to 250cps bandwidth. Rack 4 contains 3 detectors and 3 FSK converters plus signal comparators for triple diversity reception. Rack 4 also has 3 keyers to drive TTY signals over landlines as audio FSK signals. See below for more info on the racks and all the modules. Each receiver rack has 88 vacuum tubes, with 420 total for the entire system.</p><p></p><p>N4LQ's AN/FRR-24 - AM - <a href="https://www.youtube.com/watch?v=yIiC45MhYyY&feature=youtu.be" target="_blank"><u>video</u></a></p><p>N4LQ's AN/FRR-24 - CW - <a href="https://www.youtube.com/watch?v=vFUYq_l8pzU&feature=youtu.be" target="_blank"><u>video</u></a></p><p></p><p><span style="font-size: 18px"><strong>AN/FRR-37 Dual-diversity HF AM/CW/FSK Receiver</strong></span></p><p style="text-align: right"><span style="font-size: 18px"><strong><a href="http://www.navy-radio.com/rcvrs/frr24/frr37-sys-01.JPG" target="_blank"><img src="http://www.navy-radio.com/rcvrs/frr24/frr37-sys-01_small.JPG" alt="" class="fr-fic fr-dii fr-draggable " style="" /></a></strong></span></p><p><span style="font-size: 18px"><strong> System</strong></span></p><p><span style="font-size: 15px"><strong><a href="http://www.navy-radio.com/rcvrs/frr24/frr37-config.htm" target="_blank"><u>AN/FRR-37 System Configuration</u></a></strong></span></p><p>The AN/FRR-37 is almost identical to the FRR-24 except with dual-diversity. The maintenance handbook (available from <a href="http://www.w7fg.com/" target="_blank"><u>www.w7fg.com</u></a>) is NAVSHIPS 91896.3 and dated March 1953. The complete manual is NAVSHIPS 91896. <em> - MIL-HBK-161 photo thanks to <a href="http://www.jamminpower.com/" target="_blank"><u>www.jamminpower.com</u></a> </em></p><p></p><p>Procured under contract NObsr-57388 (21 May 1952) for $41,245 ea.</p><p></p><p>The FRR-37 is a 3-rack dual-diversity version of the FRR-24 and is composed of racks 2, 3, and 4 - there is no rack 1. Rack 4 has 2 of various detector, converter, and keyer modules where the FRR-24 has 3 of them.</p><p></p><p>The FRR-37 rack (CY-1377/FRR-10) is about 12-14" deeper than the FRR-24 rack (CY-680/FRR-24), making cable access much easier. Almost all the FRR-37 modules have an A suffix and are FRR-24 units, as in <a href="http://www.navy-radio.com/rcvrs/frr24/rest/37-06-sb142a.JPG" target="_blank"><u>SB-142A/FRR-24</u></a>. However some modules are slightly different, with different unit numbers:</p><p></p><ul> <li data-xf-list-type="ul"><a href="http://www.navy-radio.com/rcvrs/frr24/rest/37-11-f207.JPG" target="_blank"><u>F-207/FRR-37</u></a> bandpass filter units for racks 2 and 3 ( replaces <a href="http://www.navy-radio.com/rcvrs/frr24/module/f99-01.jpg" target="_blank"><u>F-99/FRR-24</u></a>)</li> <li data-xf-list-type="ul"><a href="http://www.navy-radio.com/rcvrs/frr24/rest/37-01-sb282.JPG" target="_blank"><u>SB-282/FRR-37</u></a> patch panel for rack 2 (replaces <a href="http://www.navy-radio.com/rcvrs/frr24/module/sb140-01.jpg" target="_blank"><u>SB-140/FRR-24</u></a>)</li> <li data-xf-list-type="ul"><a href="http://www.navy-radio.com/rcvrs/frr24/rest/37-04-sb283.JPG" target="_blank"><u>SB-283/FRR-37</u></a> patch panel for rack 3 (replaces <a href="http://www.navy-radio.com/rcvrs/frr24/module/sb169-01.jpg" target="_blank"><u>SB-169/FRR-24</u></a>)</li> <li data-xf-list-type="ul"><a href="http://www.navy-radio.com/rcvrs/frr24/rest/37-03-sb280.JPG" target="_blank"><u>SB-280/FRR-37</u></a> power distribution panel for rack 3 (replaces <a href="http://www.navy-radio.com/rcvrs/frr24/module/sb141-01.jpg" target="_blank"><u>SB-141/FRR-24</u></a>)</li> <li data-xf-list-type="ul">SB-281/FRR-37 patch panel for rack 4 (replaces <a href="http://www.navy-radio.com/rcvrs/frr24/module/sb143-01.jpg" target="_blank"><u>SB-143/FRR-24</u></a>)</li> <li data-xf-list-type="ul">PP-912/FRR-37 power supply for rack 4 lower replaces <a href="http://www.navy-radio.com/rcvrs/frr24/module/pp648-01.jpg" target="_blank"><u>PP-648/FRR-24</u></a></li> <li data-xf-list-type="ul">PP-913/FRR-37 power supply for rack 4 upper replaces <a href="http://www.navy-radio.com/rcvrs/frr24/module/pp649-01.jpg" target="_blank"><u>PP-649/FRR-24</u></a></li> </ul><p><span style="font-size: 18px"><strong>AN/FRR-10 Dual-diversity HF AM/SSB/ISB Receiver</strong></span></p><p style="text-align: right"><span style="font-size: 18px"><strong><a href="http://www.navy-radio.com/rcvrs/frr24/frr-10-sys-02.JPG" target="_blank"><img src="http://www.navy-radio.com/rcvrs/frr24/frr-10-sys-02_small.JPG" alt="" class="fr-fic fr-dii fr-draggable " style="" /></a></strong></span></p><p><span style="font-size: 18px"><strong> System </strong></span></p><p><span style="font-size: 15px"><strong><a href="http://www.navy-radio.com/rcvrs/frr24/frr10-config.htm" target="_blank"><u>AN/FRR-10 System Circuit Description, Block Diagrams, & Configuration</u></a></strong></span></p><p>The FRR-10 manual is NAVSHIPS 92144 dated 2 February 1954. The manual says it is basically the same as the predecessor receivers FRR-24 and FRR-37 except that the FRR-10 provides dual-diversity AM, SSB, and ISB (simultaneous LSB & USB) reception and does not provide FSK or CW capability. The shipping weight of a complete FRR-10 system is 3740 lbs, but the uncrated weight is a mere 2362 lbs. The FRR-10 has 253 tubes and consumes about 1450 watts.</p><p></p><p>Procured under contract number NObsr-52433 (23 May 1951) for $43,100 ea.</p><p></p><p>The FRR-10 is a 3-rack configuration containing 2 receiver racks for dual-diversity reception of AM, SSB, and ISB. It does not include FSK or CW capability. The receivers have the same 4 RF units and first converter as FRR-24 and FRR-37, but the 50kc IF amp, filters, detectors, AFC, and diversity control are all different and have /FRR-10 suffixes. IF selectivity is 8, 12, or 16kc plus USB and LSB filters. There is a motor-driven AFC control in Rack 3. Almost all the FRR-10 modules that are common to the FRR-24 have a B suffix, such AM-450B/FRR-24. However, for some reason the SB-142A/FRR-24 Control Panel is an exception.</p><p></p><p>The FRR-10 configuration uses the same rack cabinet (CY-1377/FRR-10) as the FRR-37.</p><p></p><p>Please <a href="mailto:nick@virhistory.com"><u>send e-mail</u></a> if you have any info or photos on any of these units, AN/FRR-10, AN/FRR-24, or AN/FRR-37.</p><p></p><p><span style="font-size: 18px"><strong>AN/FRR-42 and AN/FRR-43 HF AM/CW Receiver Systems</strong></span></p><p style="text-align: right"><span style="font-size: 18px"><strong><a href="http://www.navy-radio.com/rcvrs/frr24/frr42-01.JPG" target="_blank"><img src="http://www.navy-radio.com/rcvrs/frr24/frr42-01_small.JPG" alt="" class="fr-fic fr-dii fr-draggable " style="" /></a></strong></span></p><p></p><p><span style="font-size: 15px"><strong><a href="http://www.navy-radio.com/rcvrs/frr42.htm" target="_blank"><u>System Description & Configuration Information</u></a> </strong></span></p><p>The AN/FRR-42 is a 4-32 mc single channel, single-rack system similar to rack #2 of AN/FRR-24. External equipment is necessary for FSK detection.</p><p></p><p>The AN/FRR-43 is a 4-32 mc three channel, three-rack system similar to AN/FRR-24 but without the 4th rack. External equipment is necessary for diversity combining and FSK detection.</p><p></p><p>Manufactured by National - contract NObsr-57572 (19 June 1952)</p><p> AN/FRR-42 - $18,025 ea. with equipment spares</p><p> AN/FRR-43 - $54,085 ea. with equipment spares</p><p> Manual is NAVSHIPS 91891</p><p></p><p></p><p></p><p></p><p></p><p><span style="font-size: 18px"><strong>System Design </strong></span></p><p>The dual conversion receiver design is reasonably straightforward but extremely well-engineered and ruggedly-constructed - each module is a 19" rack-mounted case with a <a href="http://www.navy-radio.com/rcvrs/frr24/module/tilt-01.jpg" target="_blank"><u> slide-out, tilting chassis</u></a>. Each RF tuning module chassis is a massive aluminum casting with silver-plated tuning caps, etc.. Signal and well-filtered power connections are made internally through a plug/jack block between chassis and case. Each case (except for the power supplies) is fully enclosed with no external air access - blowers at the base of each rack force cooling air up the rack mount channels and around the sides of each module. There are openings from the air channels to the interior of a just few modules, the power supplies and CV-127 RTTY converters - all the other modules are fully enclosed.</p><p></p><p><a href="http://www.navy-radio.com/rcvrs/frr24/frr24-sys-01.JPG" target="_blank"><img src="http://www.navy-radio.com/rcvrs/frr24/frr24-sys-01_small.JPG" alt="" class="fr-fic fr-dii fr-draggable " style="" /></a></p><p>Complete FRR-24 system as shown in manual <a href="http://www.navy-radio.com/rcvrs/frr24/frr24-04.jpg" target="_blank"><img src="http://www.navy-radio.com/rcvrs/frr24/frr24-04_small.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></a></p><p><strong>FRR-24 Rack 2 - upper</strong></p></blockquote><p></p>
[QUOTE="Opmmur, post: 137461, member: 13"] [SIZE=7][COLOR=#00ff00][B][I]National AN/FRR-24, AN/FRR-37, AN/FRR-42, AN/FRR-43, and AN/FRR-10 receivers[/I][/B][/COLOR][/SIZE] [SIZE=6][B] [/B][/SIZE] If you have one of these monsters, or any pieces of one, [EMAIL='nick@virhistory.com'][U]please send me e-mail[/U][/EMAIL] - I have acquired almost all the modules and cables to [URL='http://www.navy-radio.com/rcvrs/frr24/frr24-rest-01.htm'][U] assemble a system[/U][/URL] and would like to acquire some additional pieces and information. I also have some spare modules to trade. I'd also like to correspond with other FRR-24, FRR-37, or FRR-10 owners as I start assembling and testing mine. I'd really like to hear from anyone who has photos or knows how & where these systems were used by the US Navy. [LIST] [*][URL='http://www.navy-radio.com/rcvrs/frr24/frr24-config.htm'][U]AN/FRR-24 System Configuration[/U][/URL] [*][URL='http://www.navy-radio.com/rcvrs/frr24/frr37-config.htm'][U]AN/FRR-37 System Configuration[/U][/URL] [*][URL='http://www.navy-radio.com/rcvrs/frr24/frr10-config.htm'][U]AN/FRR-10 System Configuration[/U][/URL] [*][URL='http://www.navy-radio.com/rcvrs/frr24/frr24-rest-01.htm'][U]My Restoration Project[/U][/URL] [*][URL='http://www.navy-radio.com/want-1.htm'][U]Wanted Items - page 1[/U][/URL] [*][URL='http://www.navy-radio.com/want-2.htm'][U]Wanted Items - page 2[/U][/URL] [*][URL='http://www.navy-radio.com/want-3.htm'][U]Wanted Items - page 3[/U][/URL] [*][B]Main Web Site - [/B][URL='http://www.navy-radio.com/index.htm'][B][U]1950's-60's Navy Radio[/U][/B][/URL] [/LIST] [URL='http://www.navy-radio.com/rcvrs/frr24/nat-ad-1953-01.JPG'][IMG]http://www.navy-radio.com/rcvrs/frr24/nat-ad-1953-01_small.JPG[/IMG][/URL] [I] Photo thanks to [URL='http://k1kgg.net/vintageradio.html'][U]K1KGG[/U][/URL][/I] [URL='http://www.navy-radio.com/rcvrs/frr24/frr24-03.jpg'][U][IMG]http://www.navy-radio.com/rcvrs/frr24/frr24-03_small.jpg[/IMG][/U][/URL] National Company logo at top of rack [SIZE=5][B]AN/FRR-24 Triple-diversity HF AM/CW/FSK Receiver[/B][/SIZE] [RIGHT][SIZE=5][B][URL='http://www.navy-radio.com/rcvrs/frr24/frr24-sys-01.JPG'][IMG]http://www.navy-radio.com/rcvrs/frr24/frr24-sys-01_small.JPG[/IMG][/URL][/B][/SIZE][/RIGHT] [SIZE=5][B] System [/B][/SIZE] [SIZE=4][B][URL='http://www.navy-radio.com/rcvrs/frr24/frr24-config.htm'][U]AN/FRR-24 System Configuration[/U][/URL][/B][/SIZE] The AN/FRR-24 (pictured at right) is a triple diversity dual-conversion HF (2-32 Mc.) receiver made by the National Co. (Malden, Mass.) around 1950. It was primarily designed for shore station teletype circuits. The operator's handbook 91580.2 and maintenance handbook 91580.3 that I have are dated 1952. The complete manual is NAVSHIPS 91580. Procured under contract NObsr-39402 (30 June 1947) for $60,260 ea. The AN/FRR-24 consists of 4 racks weighing a total of 3,121 lbs. Racks 1, 2, and 3 contain essentially identical receiver assemblies. Each receiver rack has 4 RF tuning modules (2-4mc, 4-8mc, 8-16mc, 16-32mc). Each receiver rack also has a detector/AF unit for monitoring purposes. IF selectivity can be set from 18kc to 250cps bandwidth. Rack 4 contains 3 detectors and 3 FSK converters plus signal comparators for triple diversity reception. Rack 4 also has 3 keyers to drive TTY signals over landlines as audio FSK signals. See below for more info on the racks and all the modules. Each receiver rack has 88 vacuum tubes, with 420 total for the entire system. N4LQ's AN/FRR-24 - AM - [URL='https://www.youtube.com/watch?v=yIiC45MhYyY&feature=youtu.be'][U]video[/U][/URL] N4LQ's AN/FRR-24 - CW - [URL='https://www.youtube.com/watch?v=vFUYq_l8pzU&feature=youtu.be'][U]video[/U][/URL] [SIZE=5][B]AN/FRR-37 Dual-diversity HF AM/CW/FSK Receiver[/B][/SIZE] [RIGHT][SIZE=5][B][URL='http://www.navy-radio.com/rcvrs/frr24/frr37-sys-01.JPG'][IMG]http://www.navy-radio.com/rcvrs/frr24/frr37-sys-01_small.JPG[/IMG][/URL][/B][/SIZE][/RIGHT] [SIZE=5][B] System[/B][/SIZE] [SIZE=4][B][URL='http://www.navy-radio.com/rcvrs/frr24/frr37-config.htm'][U]AN/FRR-37 System Configuration[/U][/URL][/B][/SIZE] The AN/FRR-37 is almost identical to the FRR-24 except with dual-diversity. The maintenance handbook (available from [URL='http://www.w7fg.com/'][U]www.w7fg.com[/U][/URL]) is NAVSHIPS 91896.3 and dated March 1953. The complete manual is NAVSHIPS 91896. [I] - MIL-HBK-161 photo thanks to [URL='http://www.jamminpower.com/'][U]www.jamminpower.com[/U][/URL] [/I] Procured under contract NObsr-57388 (21 May 1952) for $41,245 ea. The FRR-37 is a 3-rack dual-diversity version of the FRR-24 and is composed of racks 2, 3, and 4 - there is no rack 1. Rack 4 has 2 of various detector, converter, and keyer modules where the FRR-24 has 3 of them. The FRR-37 rack (CY-1377/FRR-10) is about 12-14" deeper than the FRR-24 rack (CY-680/FRR-24), making cable access much easier. Almost all the FRR-37 modules have an A suffix and are FRR-24 units, as in [URL='http://www.navy-radio.com/rcvrs/frr24/rest/37-06-sb142a.JPG'][U]SB-142A/FRR-24[/U][/URL]. However some modules are slightly different, with different unit numbers: [LIST] [*][URL='http://www.navy-radio.com/rcvrs/frr24/rest/37-11-f207.JPG'][U]F-207/FRR-37[/U][/URL] bandpass filter units for racks 2 and 3 ( replaces [URL='http://www.navy-radio.com/rcvrs/frr24/module/f99-01.jpg'][U]F-99/FRR-24[/U][/URL]) [*][URL='http://www.navy-radio.com/rcvrs/frr24/rest/37-01-sb282.JPG'][U]SB-282/FRR-37[/U][/URL] patch panel for rack 2 (replaces [URL='http://www.navy-radio.com/rcvrs/frr24/module/sb140-01.jpg'][U]SB-140/FRR-24[/U][/URL]) [*][URL='http://www.navy-radio.com/rcvrs/frr24/rest/37-04-sb283.JPG'][U]SB-283/FRR-37[/U][/URL] patch panel for rack 3 (replaces [URL='http://www.navy-radio.com/rcvrs/frr24/module/sb169-01.jpg'][U]SB-169/FRR-24[/U][/URL]) [*][URL='http://www.navy-radio.com/rcvrs/frr24/rest/37-03-sb280.JPG'][U]SB-280/FRR-37[/U][/URL] power distribution panel for rack 3 (replaces [URL='http://www.navy-radio.com/rcvrs/frr24/module/sb141-01.jpg'][U]SB-141/FRR-24[/U][/URL]) [*]SB-281/FRR-37 patch panel for rack 4 (replaces [URL='http://www.navy-radio.com/rcvrs/frr24/module/sb143-01.jpg'][U]SB-143/FRR-24[/U][/URL]) [*]PP-912/FRR-37 power supply for rack 4 lower replaces [URL='http://www.navy-radio.com/rcvrs/frr24/module/pp648-01.jpg'][U]PP-648/FRR-24[/U][/URL] [*]PP-913/FRR-37 power supply for rack 4 upper replaces [URL='http://www.navy-radio.com/rcvrs/frr24/module/pp649-01.jpg'][U]PP-649/FRR-24[/U][/URL] [/LIST] [SIZE=5][B]AN/FRR-10 Dual-diversity HF AM/SSB/ISB Receiver[/B][/SIZE] [RIGHT][SIZE=5][B][URL='http://www.navy-radio.com/rcvrs/frr24/frr-10-sys-02.JPG'][IMG]http://www.navy-radio.com/rcvrs/frr24/frr-10-sys-02_small.JPG[/IMG][/URL][/B][/SIZE][/RIGHT] [SIZE=5][B] System [/B][/SIZE] [SIZE=4][B][URL='http://www.navy-radio.com/rcvrs/frr24/frr10-config.htm'][U]AN/FRR-10 System Circuit Description, Block Diagrams, & Configuration[/U][/URL][/B][/SIZE] The FRR-10 manual is NAVSHIPS 92144 dated 2 February 1954. The manual says it is basically the same as the predecessor receivers FRR-24 and FRR-37 except that the FRR-10 provides dual-diversity AM, SSB, and ISB (simultaneous LSB & USB) reception and does not provide FSK or CW capability. The shipping weight of a complete FRR-10 system is 3740 lbs, but the uncrated weight is a mere 2362 lbs. The FRR-10 has 253 tubes and consumes about 1450 watts. Procured under contract number NObsr-52433 (23 May 1951) for $43,100 ea. The FRR-10 is a 3-rack configuration containing 2 receiver racks for dual-diversity reception of AM, SSB, and ISB. It does not include FSK or CW capability. The receivers have the same 4 RF units and first converter as FRR-24 and FRR-37, but the 50kc IF amp, filters, detectors, AFC, and diversity control are all different and have /FRR-10 suffixes. IF selectivity is 8, 12, or 16kc plus USB and LSB filters. There is a motor-driven AFC control in Rack 3. Almost all the FRR-10 modules that are common to the FRR-24 have a B suffix, such AM-450B/FRR-24. However, for some reason the SB-142A/FRR-24 Control Panel is an exception. The FRR-10 configuration uses the same rack cabinet (CY-1377/FRR-10) as the FRR-37. Please [EMAIL='nick@virhistory.com'][U]send e-mail[/U][/EMAIL] if you have any info or photos on any of these units, AN/FRR-10, AN/FRR-24, or AN/FRR-37. [SIZE=5][B]AN/FRR-42 and AN/FRR-43 HF AM/CW Receiver Systems[/B][/SIZE] [RIGHT][SIZE=5][B][URL='http://www.navy-radio.com/rcvrs/frr24/frr42-01.JPG'][IMG]http://www.navy-radio.com/rcvrs/frr24/frr42-01_small.JPG[/IMG][/URL][/B][/SIZE][/RIGHT] [SIZE=4][B][URL='http://www.navy-radio.com/rcvrs/frr42.htm'][U]System Description & Configuration Information[/U][/URL] [/B][/SIZE] The AN/FRR-42 is a 4-32 mc single channel, single-rack system similar to rack #2 of AN/FRR-24. External equipment is necessary for FSK detection. The AN/FRR-43 is a 4-32 mc three channel, three-rack system similar to AN/FRR-24 but without the 4th rack. External equipment is necessary for diversity combining and FSK detection. Manufactured by National - contract NObsr-57572 (19 June 1952) AN/FRR-42 - $18,025 ea. with equipment spares AN/FRR-43 - $54,085 ea. with equipment spares Manual is NAVSHIPS 91891 [SIZE=5][B]System Design [/B][/SIZE] The dual conversion receiver design is reasonably straightforward but extremely well-engineered and ruggedly-constructed - each module is a 19" rack-mounted case with a [URL='http://www.navy-radio.com/rcvrs/frr24/module/tilt-01.jpg'][U] slide-out, tilting chassis[/U][/URL]. Each RF tuning module chassis is a massive aluminum casting with silver-plated tuning caps, etc.. Signal and well-filtered power connections are made internally through a plug/jack block between chassis and case. Each case (except for the power supplies) is fully enclosed with no external air access - blowers at the base of each rack force cooling air up the rack mount channels and around the sides of each module. There are openings from the air channels to the interior of a just few modules, the power supplies and CV-127 RTTY converters - all the other modules are fully enclosed. [URL='http://www.navy-radio.com/rcvrs/frr24/frr24-sys-01.JPG'][IMG]http://www.navy-radio.com/rcvrs/frr24/frr24-sys-01_small.JPG[/IMG][/URL] Complete FRR-24 system as shown in manual [URL='http://www.navy-radio.com/rcvrs/frr24/frr24-04.jpg'][IMG]http://www.navy-radio.com/rcvrs/frr24/frr24-04_small.jpg[/IMG][/URL] [B]FRR-24 Rack 2 - upper[/B] [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Time Travel Forum
Time Machines & Experiments
The Secret Time Travel Experiments of Nikola Tesla
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.
Accept
Learn more…
Top