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<blockquote data-quote="Opmmur" data-source="post: 137462" data-attributes="member: 13"><p><strong><strong>FRR-24 Rack 2 - lower</strong></strong></p><p><strong></strong></p><p> 2nd mixer, detector/monitor, IF amp, patch panel, bandpass filters, xtal osc, power supply <a href="http://www.navy-radio.com/rcvrs/frr24/frr24-02.jpg" target="_blank"><img src="http://www.navy-radio.com/rcvrs/frr24/frr24-02_small.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></a></p><p><strong></strong></p><p><strong>FRR-24 racks</strong></p><p>left rack - misc storage</p><p></p><p>Rack 2 - receiver unit #2</p><p> <em>The photos above are from an eBay listing several years ago - If you are the current owner of this or any other FRR-24, please <a href="mailto:nick@virhistory.com"><u>let me know</u></a></em></p><p><a href="http://www.navy-radio.com/rcvrs/frr24/frr-10-sys-02.JPG" target="_blank">http://www.navy-radio.com/rcvrs/frr24/frr-10-sys-02.JPG</a></p><p><a href="http://www.navy-radio.com/rcvrs/frr24/rest3/rack1-04.jpg" target="_blank"><img src="http://www.navy-radio.com/rcvrs/frr24/rest3/rack1-04_small.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></a></p><p>MY FRR-24 WORKS!</p><p>with 3 RF units installed so far</p><p>11/06/2007 <a href="http://www.navy-radio.com/rcvrs/frr24/frr24-rest-01.htm" target="_blank"><img src="http://www.navy-radio.com/rcvrs/frr24/rest/p087_small.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></a></p><p><a href="http://www.navy-radio.com/rcvrs/frr24/frr24-rest-01.htm" target="_blank"><u> Click Here</u></a> for photos of my FRR-24 and FRR-37 systems undergoing re-assembly and restoration -- --</p><p><a href="http://www.navy-radio.com/rcvrs/frr24/rest/DSC03014.JPG" target="_blank"><img src="http://www.navy-radio.com/rcvrs/frr24/rest/DSC03014_small.JPG" alt="" class="fr-fic fr-dii fr-draggable " style="" /></a></p><p>Typical Module Construction -</p><p>AM-453 RF tuning module underside-</p><p>massive aluminum casting for chassis <a href="http://www.navy-radio.com/rcvrs/frr24/rest/DSC03015.JPG" target="_blank"><img src="http://www.navy-radio.com/rcvrs/frr24/rest/DSC03015_small.JPG" alt="" class="fr-fic fr-dii fr-draggable " style="" /></a></p><p>Local Oscillator <a href="http://www.navy-radio.com/rcvrs/frr24/rest/DSC03016.JPG" target="_blank"><img src="http://www.navy-radio.com/rcvrs/frr24/rest/DSC03016_small.JPG" alt="" class="fr-fic fr-dii fr-draggable " style="" /></a></p><p>Local Oscillator <a href="http://www.navy-radio.com/rcvrs/frr24/rest/DSC03017.JPG" target="_blank"><img src="http://www.navy-radio.com/rcvrs/frr24/rest/DSC03017_small.JPG" alt="" class="fr-fic fr-dii fr-draggable " style="" /></a></p><p>Local Oscillator</p><p><a href="http://www.navy-radio.com/rcvrs/frr24/rest3/am453-01.jpg" target="_blank"><img src="http://www.navy-radio.com/rcvrs/frr24/rest3/am453-01_small.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></a></p><p>Typical Module Construction -</p><p>AM-453 RF tuning module underside-</p><p>massive aluminum casting for chassis <a href="http://www.navy-radio.com/rcvrs/frr24/rest3/am453-02.jpg" target="_blank"><img src="http://www.navy-radio.com/rcvrs/frr24/rest3/am453-02_small.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></a></p><p>AM-453 close-up of antenna, 3 RF, and mixer stages with thorough shielding <a href="http://www.navy-radio.com/rcvrs/frr24/rest3/am453-03.jpg" target="_blank"><img src="http://www.navy-radio.com/rcvrs/frr24/rest3/am453-03_small.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></a></p><p>AM-453 close-up - cover for RF stages - grounding fingers plus thick silver-plated cover. --</p><p><a href="http://www.navy-radio.com/rcvrs/frr24/rest3/sb142-05.jpg" target="_blank"><img src="http://www.navy-radio.com/rcvrs/frr24/rest3/sb142-05_small.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></a></p><p>Typical Module Construction -</p><p>SB-142 "bandswitch" layout with individual shield boxes for each switch section <a href="http://www.navy-radio.com/rcvrs/frr24/rest3/sb142-01.jpg" target="_blank"><img src="http://www.navy-radio.com/rcvrs/frr24/rest3/sb142-01_small.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></a></p><p>SB-142 energizes a selected RF unit and routes HF oscillator and AGC lines to/from it<a href="http://www.navy-radio.com/rcvrs/frr24/rest3/sb142-01.jpg" target="_blank">http://www.navy-radio.com/rcvrs/frr24/rest3/sb142-01.jpg</a></p><p><a href="http://www.navy-radio.com/rcvrs/frr24/rest3/sb142-02.jpg" target="_blank"><img src="http://www.navy-radio.com/rcvrs/frr24/rest3/sb142-02_small.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></a></p><p>SB-142 close-up showing spring grounding clips for shields - coax is fed from rear connector under chassis and into shielded box. <a href="http://www.navy-radio.com/rcvrs/frr24/rest3/sb142-03.jpg" target="_blank"><img src="http://www.navy-radio.com/rcvrs/frr24/rest3/sb142-03_small.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></a></p><p>SB-142 close up showing additional spring grounding fingers on shield</p><p>There are 420 tubes in a complete AN/FRR-24. There are 88 tubes within each of the three receiver assemblies. Most RF and IF amp stages use type 9003 pentodes. For illustration, the main signal path of one receiver assembly (configured for AM reception) has over 20 tubes in the signal chain and is organized as follows -</p><p></p><ul> <li data-xf-list-type="ul">Bandswitch selects 1 of 4 RF units</li> <li data-xf-list-type="ul">3 RF amp stages 6BA6 + 2x9003</li> <li data-xf-list-type="ul">1st mixer (1750 kc IF out) 6BE6</li> <li data-xf-list-type="ul">5 IF amp stages 5x9003</li> <li data-xf-list-type="ul">2nd mixer (50 kc IF out) 6BE6</li> <li data-xf-list-type="ul">1 IF amp stage 6C4</li> <li data-xf-list-type="ul">Bandwidth selects 1 of 8 filters (125 cycles to 18 kc) with 0-2 IF amp stages 9003 or 6AG5</li> <li data-xf-list-type="ul">7 IF amp stages 3x9003 + 6C4 + 3x6AK6</li> <li data-xf-list-type="ul">detector 6AL5</li> <li data-xf-list-type="ul">AF amp 6BA6</li> <li data-xf-list-type="ul">AF output 6AK6</li> </ul><p>The AN/FRR-24 is exceptionally versatile. A set of patch panels allows the system to operate in different configurations. The Operator's manual lists 14 modes of operation and then says "these are but a few of the possible combinations of units". For example the system can operate as 3 separate receivers. Or it can combine outputs in dual or triple diversity mode. The three racks can be separately tuned or one of the receivers can be used as a master oscillator for the others, or a separate crystal oscillator can drive one or more receivers. There are also multiple ways to couple AGC voltage among the units.</p><p></p><ul> <li data-xf-list-type="ul"><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></li> <li data-xf-list-type="ul"><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></li> <li data-xf-list-type="ul"><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></li> <li data-xf-list-type="ul"><span style="font-size: 15px"><strong><a href="http://www.navy-radio.com/index.htm" target="_blank"><u>Main Page - US Navy Radio info</u></a></strong></span></li> <li data-xf-list-type="ul"><span style="font-size: 15px"><strong><a href="http://www.navy-radio.com/commsta.htm" target="_blank"><u>Info on US Navy Comm Stations</u></a> </strong></span></li> <li data-xf-list-type="ul"><span style="font-size: 15px"><strong><a href="http://www.navy-radio.com/want-1.htm" target="_blank"><u>Wanted Items - page 1</u></a></strong></span></li> <li data-xf-list-type="ul"><span style="font-size: 15px"><strong><a href="http://www.navy-radio.com/want-2.htm" target="_blank"><u>Wanted Items - page 2</u></a></strong></span></li> <li data-xf-list-type="ul"><span style="font-size: 15px"><strong><a href="http://www.navy-radio.com/want-3.htm" target="_blank"><u>Wanted items - page 3</u></a></strong></span></li> </ul><p><strong>Links -</strong></p><p></p><ul> <li data-xf-list-type="ul">If you have any additional info, or parts for sale or trade, <br /> please let me know - <a href="mailto:nick@virhistory.com"><u>nick@virhistory.com</u></a></li> <li data-xf-list-type="ul">Last updated 11/17/2015</li> <li data-xf-list-type="ul"><a href="http://www.navy-radio.com/ham/hobbies.html" target="_blank"><u>Back to K4NYW radio page</u></a></li> <li data-xf-list-type="ul"><a href="http://www.nj7p.org/cgi-bin/millist2?mode=normal&name=AN/FRR-24" target="_blank"><u>Military Data Base Info</u></a> - thanks to Bill NJ7P</li> <li data-xf-list-type="ul">Can the FRR-24 be used as a multi-dimensional space-time resonator ?? <a href="http://www.bibliotecapleyades.net/montauk/esp_montauk_16c.htm" target="_blank"><u>Check it out</u></a></li> </ul></blockquote><p></p>
[QUOTE="Opmmur, post: 137462, member: 13"] [B][B]FRR-24 Rack 2 - lower[/B] [/B] 2nd mixer, detector/monitor, IF amp, patch panel, bandpass filters, xtal osc, power supply [URL='http://www.navy-radio.com/rcvrs/frr24/frr24-02.jpg'][IMG]http://www.navy-radio.com/rcvrs/frr24/frr24-02_small.jpg[/IMG][/URL] [B] FRR-24 racks[/B] left rack - misc storage Rack 2 - receiver unit #2 [I]The photos above are from an eBay listing several years ago - If you are the current owner of this or any other FRR-24, please [EMAIL='nick@virhistory.com'][U]let me know[/U][/EMAIL][/I] [URL='http://www.navy-radio.com/rcvrs/frr24/frr-10-sys-02.JPG'][/URL] [URL='http://www.navy-radio.com/rcvrs/frr24/rest3/rack1-04.jpg'][IMG]http://www.navy-radio.com/rcvrs/frr24/rest3/rack1-04_small.jpg[/IMG][/URL] MY FRR-24 WORKS! with 3 RF units installed so far 11/06/2007 [URL='http://www.navy-radio.com/rcvrs/frr24/frr24-rest-01.htm'][IMG]http://www.navy-radio.com/rcvrs/frr24/rest/p087_small.jpg[/IMG] [U] Click Here[/U][/URL] for photos of my FRR-24 and FRR-37 systems undergoing re-assembly and restoration -- -- [URL='http://www.navy-radio.com/rcvrs/frr24/rest/DSC03014.JPG'][IMG]http://www.navy-radio.com/rcvrs/frr24/rest/DSC03014_small.JPG[/IMG][/URL] Typical Module Construction - AM-453 RF tuning module underside- massive aluminum casting for chassis [URL='http://www.navy-radio.com/rcvrs/frr24/rest/DSC03015.JPG'][IMG]http://www.navy-radio.com/rcvrs/frr24/rest/DSC03015_small.JPG[/IMG][/URL] Local Oscillator [URL='http://www.navy-radio.com/rcvrs/frr24/rest/DSC03016.JPG'][IMG]http://www.navy-radio.com/rcvrs/frr24/rest/DSC03016_small.JPG[/IMG][/URL] Local Oscillator [URL='http://www.navy-radio.com/rcvrs/frr24/rest/DSC03017.JPG'][IMG]http://www.navy-radio.com/rcvrs/frr24/rest/DSC03017_small.JPG[/IMG][/URL] Local Oscillator [URL='http://www.navy-radio.com/rcvrs/frr24/rest3/am453-01.jpg'][IMG]http://www.navy-radio.com/rcvrs/frr24/rest3/am453-01_small.jpg[/IMG][/URL] Typical Module Construction - AM-453 RF tuning module underside- massive aluminum casting for chassis [URL='http://www.navy-radio.com/rcvrs/frr24/rest3/am453-02.jpg'][IMG]http://www.navy-radio.com/rcvrs/frr24/rest3/am453-02_small.jpg[/IMG][/URL] AM-453 close-up of antenna, 3 RF, and mixer stages with thorough shielding [URL='http://www.navy-radio.com/rcvrs/frr24/rest3/am453-03.jpg'][IMG]http://www.navy-radio.com/rcvrs/frr24/rest3/am453-03_small.jpg[/IMG][/URL] AM-453 close-up - cover for RF stages - grounding fingers plus thick silver-plated cover. -- [URL='http://www.navy-radio.com/rcvrs/frr24/rest3/sb142-05.jpg'][IMG]http://www.navy-radio.com/rcvrs/frr24/rest3/sb142-05_small.jpg[/IMG][/URL] Typical Module Construction - SB-142 "bandswitch" layout with individual shield boxes for each switch section [URL='http://www.navy-radio.com/rcvrs/frr24/rest3/sb142-01.jpg'][IMG]http://www.navy-radio.com/rcvrs/frr24/rest3/sb142-01_small.jpg[/IMG][/URL] SB-142 energizes a selected RF unit and routes HF oscillator and AGC lines to/from it[URL='http://www.navy-radio.com/rcvrs/frr24/rest3/sb142-01.jpg'][/URL] [URL='http://www.navy-radio.com/rcvrs/frr24/rest3/sb142-02.jpg'][IMG]http://www.navy-radio.com/rcvrs/frr24/rest3/sb142-02_small.jpg[/IMG][/URL] SB-142 close-up showing spring grounding clips for shields - coax is fed from rear connector under chassis and into shielded box. [URL='http://www.navy-radio.com/rcvrs/frr24/rest3/sb142-03.jpg'][IMG]http://www.navy-radio.com/rcvrs/frr24/rest3/sb142-03_small.jpg[/IMG][/URL] SB-142 close up showing additional spring grounding fingers on shield There are 420 tubes in a complete AN/FRR-24. There are 88 tubes within each of the three receiver assemblies. Most RF and IF amp stages use type 9003 pentodes. For illustration, the main signal path of one receiver assembly (configured for AM reception) has over 20 tubes in the signal chain and is organized as follows - [LIST] [*]Bandswitch selects 1 of 4 RF units [*]3 RF amp stages 6BA6 + 2x9003 [*]1st mixer (1750 kc IF out) 6BE6 [*]5 IF amp stages 5x9003 [*]2nd mixer (50 kc IF out) 6BE6 [*]1 IF amp stage 6C4 [*]Bandwidth selects 1 of 8 filters (125 cycles to 18 kc) with 0-2 IF amp stages 9003 or 6AG5 [*]7 IF amp stages 3x9003 + 6C4 + 3x6AK6 [*]detector 6AL5 [*]AF amp 6BA6 [*]AF output 6AK6 [/LIST] The AN/FRR-24 is exceptionally versatile. A set of patch panels allows the system to operate in different configurations. The Operator's manual lists 14 modes of operation and then says "these are but a few of the possible combinations of units". For example the system can operate as 3 separate receivers. Or it can combine outputs in dual or triple diversity mode. The three racks can be separately tuned or one of the receivers can be used as a master oscillator for the others, or a separate crystal oscillator can drive one or more receivers. There are also multiple ways to couple AGC voltage among the units. [LIST] [*][SIZE=4][B][URL='http://www.navy-radio.com/rcvrs/frr24/frr24-config.htm'][U]AN/FRR-24 System Configuration[/U][/URL][/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] [*][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] [*][SIZE=4][B][URL='http://www.navy-radio.com/index.htm'][U]Main Page - US Navy Radio info[/U][/URL][/B][/SIZE] [*][SIZE=4][B][URL='http://www.navy-radio.com/commsta.htm'][U]Info on US Navy Comm Stations[/U][/URL] [/B][/SIZE] [*][SIZE=4][B][URL='http://www.navy-radio.com/want-1.htm'][U]Wanted Items - page 1[/U][/URL][/B][/SIZE] [*][SIZE=4][B][URL='http://www.navy-radio.com/want-2.htm'][U]Wanted Items - page 2[/U][/URL][/B][/SIZE] [*][SIZE=4][B][URL='http://www.navy-radio.com/want-3.htm'][U]Wanted items - page 3[/U][/URL][/B][/SIZE] [/LIST] [B]Links -[/B] [LIST] [*]If you have any additional info, or parts for sale or trade, please let me know - [EMAIL='nick@virhistory.com'][U]nick@virhistory.com[/U][/EMAIL] [*]Last updated 11/17/2015 [*][URL='http://www.navy-radio.com/ham/hobbies.html'][U]Back to K4NYW radio page[/U][/URL] [*][URL='http://www.nj7p.org/cgi-bin/millist2?mode=normal&name=AN/FRR-24'][U]Military Data Base Info[/U][/URL] - thanks to Bill NJ7P [*]Can the FRR-24 be used as a multi-dimensional space-time resonator ?? [URL='http://www.bibliotecapleyades.net/montauk/esp_montauk_16c.htm'][U]Check it out[/U][/URL] [/LIST] [/QUOTE]
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