DDR-5 Gallery

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The DDR-5 family of receivers could be, and were, configured in a huge variety of ways.  To maintain some semblance of sanity while sorting through the photos of these receivers, I built the following tables.  With any luck, this may help you sort through the various options...  Among the many TMC documents was a fat binder evidently used by Ernie Matson (VP Sales) to help configure DDR-5 radios.  This included single-page drawings of some of the configurations, and I've included scans of the ones I have.  There are also a bunch of example system diagrams on large drawings.  I'll add them and a more thorough technical discussion of the remote-tuned Technimatic DDR-5's at some point.

Manually Tuned DDR-5's

DDR-5 Modules

To figure out which of the many version of this receiver you're dealing with, you first have to be able to recognize the components of the system.  I found the following table to be useful:

Module Picture Function
HFR hfr-1_front.jpg (446049 bytes) RF Tuner.  This unit is essentially a conventional front end with first mixer for a superhet radio.  It's local oscillator includes a varactor that allows it to be phase-locked to the synthesizer.  The unit also includes the first IF amplifier at 1.75Mc.  HFR-1 shown.
HFS hfs-1_overall_left.jpg (444459 bytes) Synthesizer.  This unit is the synthesizer used to phase-lock the local oscillator to the operating frequency.  It has a numerical readout, but its digits are merely set by the frequency switches.  HFS-1 shown.
AFC afc-2_front.jpg (300766 bytes) Automatic Frequency Control.  This unit operates within the 250Kc IF of the receiver and compensates for drift in the receiver front end, and in the distant transmitter.  AFC-2 shown.
HSP hsp-1_front.jpg (20870 bytes) Audio Switch Panel.
HFI hfi-1_front.jpg (395412 bytes) IF Amplifier.  Contains the 2nd mixer, 250 Kc IF amplifier, and set of bandpass filters.  HFI-1 shown.
HNF hnf-1_front.jpg (262998 bytes) Variable Notch Filter.  This filter sits in the 250Kc IF chain.  It up-converts to 447-460Kc, passes through a fixed notch filter, then down-converts to 250Kc again, using a pair of mixers and internal 197-213Kc oscillator.  HNF-1 shown.
HFA hfa-1_front.jpg (414125 bytes) Detector and Audio Amplifier.  Contains an AM detector, product detector, BFO, and audio output stages.  HFA-1 shown.
HAF haf-1_front.jpg (271051 bytes) Audio Filter.  A passive LC dual-channel filter with independent hi- and lo-pass functions.  HAF-1 shown.
HFP hfp-1_front.jpg (367253 bytes) Power Supply.  Dual regulated supply that supplies most of the B+ and filament voltages for the receiver.  It also provides switched AC supply for certain functions.  HFP-1 shown.
HSS lsp-1_front.jpg (344061 bytes) Speaker Panel.  HSS-1's (one speaker) and HSS-2's (dual speakers) are used in various configurations.  Shown is an LSP-1, since I don't have a decent photo of an HSS--they're nearly identical.
DVM dvm-2_front.jpg (617874 bytes) Diversity Visual Monitor.  Visual tuning aid for diversity operation.
HPP hpp-1_front.jpg (281917 bytes) Power Panel.
MSA msa-1_front.jpg (439391 bytes) Multiple Sideband Adapter.  This unit contains a common 3rd mixer that converts the 1.75Mc IF input down to 250Kc.  There are then four independent  IF's spaced symmetrically around 250Kc (2 below, 2 above), with independent AGC's and four independent sets of  product detectors, BFOs, squelch, and AF amplifiers.  This unit usually works with MCG.  MSA-1 shown.  The MSA/MCG pair essentially replaced the HFI & HFA of the earlier receivers.
MFP mfp-1_front.jpg (335450 bytes) Power Supply.  Supplies power to the MSA.  MFP-1 shown.
MCG mcg-1_front.jpg (245884 bytes) Multiple Carrier Generator.  Provides the 2Mc translation frequency for the 3rd mixer, and BFO injections at 243.71, 250.00, and 256.29 Kc for the MSA.  MCG-1 shown.
SBS sbs-1_front.jpg (377370 bytes) Multiple Sideband Adapter.  This unit contains an input mixer, a 250Kc IF with multiple filters, and two sets of AM and product detectors, and 2 audio outputs.
HFF hff-1_front.jpg (594157 bytes) Radio Frequency Amplifier, Fixed Tuned.  This unit replaces the HFR in the various fixed-tuned receivers, providing 8 pre-set, fixed receive frequencies.
     

Overview

The chart below outlines the various configuration of manually tuned DDR-5's.  Many of these configurations had military designations; refer to the cross-reference chart to see which is which.

Type Tuner Synthesizer AFC IF/Audio Spkrs Pwr Supply AC Pnl Other Dwg
DDR-5 HFR-1 HFS-1 AFC-3 HFI-1, HFA-1, HSP-1   HFP-1      
DDR-5A 2xHFR-1 HFS-1 2xAFC-3 2xHFI-1, 2xHNF-1, 2xHFA-1, 2xHAF-1 2xHSS-1 2xHFP-1 HPP-1 DVM-4 ddr-5a_dwg.jpg.jpg (1324971 bytes)
DDR-5A1 2xHFR-1 HFS-1 2xAFC-3 2xHFI-1, 2xHNF-1, 2xHFA-1, 2xHAF-1, 1xHSP-2 1xHSS-1 1xHFP-1 HPP-1 DVM-4  
DDR-5B HFR-1 HFS-1 AFC-3 HFI-1, HNF-1, HFA-1, HAF-1, HSP-2 HSS-1 HFP-1 HPP-1    
DDR-5B1 HFR-1 HFS-1 AFC-3 HFI-1, HNF-1, HFA-1,  HSP-2 HSS-1 HFP-1 HPP-1    
DDR-5C 2xHFR-1 2xHFS-1 2xAFC-3 2xHFI-1, 2xHNF-1, 2xHFA-1, 2xHAF-1, 1xHSP-2 2xHSS-1 HFP-1 HPP-1    
DDR-5CA 2xHFR-2 2xHFS-1 2xAFC-3 2xHFI-1, 2xHNF-1, 2xHFA-1, 2xHAF-1, 2xHSP-2 HSS-1 2xHFP-1 HPP-1    
DDR-5D Unknown                
DDR-5E 2xHFR-1 2xHFS-1   2xSBS-2, 1xHSP-2 HSS-2 2xHFP-1 HPP-2 DVC-1  
DDR-5G 2xHFR-1 2xHFS-1   2xMSA-1, MCG-1 HSS-2 HFP-1 HPP-2    
DDR-5H 2xHFR-1A HFS-1   2xMSA-1, MCG-1   HFP-1, MHPA-1     ddr-5h_dwg.jpg (2145719 bytes)
DDR-5J 2xHFF-1 HFS-1   2xMSA-1, MCG-1   HFP-1, MFP-1 HPP-1    
DDR-5K HFR-2 HFS-1 AFC-3 MSA-1, MCG-1 HSS-8 HFP-1, MFP-1 HPP-1    
DDR-5KA HFR-2 HFS-1 AFC-3 MSA-1, MCG-1 HSS-8 HFP-1, MFP-1      
DDR-5KB HFR-2B HFS-2 AFC-3 MSA-1, MCG-1 HSS-8 HFP-1, MFP-1 HPP-1    
DDR-5KS HFR-2B HFS-2   MSA-1, MCG-1 HSS-8 HFP-1, MFP-1 HPP-1 220v, 50cps operation  
DDR-5KS1 HFR-2B HFS-2   MSA-1, MCG-1 HSS-8 HFP-1, MFP-1 HPP-1 220v, 50cps operation  
DDR-5KS1 HFR-2B HFS-2   MSA-1, MCG-1 SPP-4004 HFP-1, MFP-1 HPP-1 220v, 50cps operation  
DDR-5L 2xHFR-1A HFSR-1 2xAFC-3 2xMSA-1, 2xMCG-1, 2xHFA-1 BSP-6P 2xHFP-1 HPP-1    
DDR-5LS 2xHFR-2B HFS-2   2xMSA-1, 2xMCG-1 BSP-6 2xHFP-1 HPP-1 like 5L, 220V, 50cps op  
DDR-5M 2xHFR-2 2xHFS-1 2xAFC-3 2xMSA-1, 2xMCG-1 2xHSS-6 2xHFP-1      
DDR-5P 2xHFR-2 HFS-1 2xAFC-3 2xMSA-1, 2xMCG-1, 2xHFP-1 HSS-4        
DDR-5Q HFR-2 HFS-1   MSA-1 HSS-5 HFP-1      
DDR-5R HFR-2 HFS-1   MSA-1, MCG-1 HSS-4 HFP-1   CFA-1  
DDR-5S HFR-2, HFF HFS-1   HFA, RMXI-2   HFP-1      
DDR-5T HFR-2, HFF HFS-1   HFA, RMXI-2   HFP-1      
DDR-5U HFR-1A HFS-1   HFI-1, HFA-1, RMXI-2 HSS-1 HFP-1   CFA-2 ddr-5u_dwg.jpg (1524704 bytes)
DDR-5V HFR-1A HFS-1 AFC-3 MSA-1, MCG-1   HFP-1   CFA-1  
DDR-5Y 2xHFR-2 HFS-1   2xHFI-1, 2xHFA-1 2xBSP-4 HFP-1 HPP-1 2 special filter panels  
DDR-50 2xHFR-1 HFS-1 2xAFC-3 2xMSA-1, 2xMCG-1, HSP-2 HSS-2 2xHFP-1 HPP-2    
DDR-51 2xHFR-1 HFS-1 2xAFC-3 2xMSA-1, 2xMCG-1 HSS-2 2xHFP-1 HPP-2    
DDR-52 HFR-1 HFS-1 AFC-3 MSA-1, MCG-1, HSP-1 HSS-2 HFP-1 HPP-1    
DDR-53 2xHFR-1 2xHFS-1 2xAFC-3 2xMSA-1, 2xMCG-1, 2xHSP-1 2xHSS-2 2xHFP-1 2xHPP-1    
DDR-54 2xHFR-1 2xHFS-1 2xAFC-3 2xMSA-1, 2xMCG-1, 2xHSP-1 2xBSP-2 2xHFP-1      
DDR-55 2xHFR-2 HFS-1 2xAFC-3 2xMSA-1, 2xMCG-1, 1xHFP-1, HSS-4 HFP-1, MHPA-1     ddr-55_dwg.jpg (1528970 bytes)
DDR-501 HFF-1 HFS-1 AFC-3 MSA-1, MCG-1, HSP-1 HSS-2 HFP-1      
DDR-502 2xHFF-1 2xHFS-1 2xAFC-3 2xMSA-1, 2xMCG-1, 2xHSP-1 2xHSS-2 2xHFP-1      
DDR-503 2xHFF-1 HSF-1 2xAFC-3 2xHFI-1, 2xHNF-1, 2xHFA-1, 2xHAF-1 2xHSS-1 2xHFP-1 HPP-1 DVM-4  
DDR-505 HFR-1A HFS-1A AFC-3 HFI-1, HFA-1, HAF-1,  HNF-1, RMX-2 BSP-2X HFP-1 HPP-1    
DDR-551 HFR-1 HFS-1   SBS-1 HSS HFP-1 HPP-1    
DDR-551A HFR-1 HFS-1 AFC-3 SBS-1 HSS HFP-1 HPP-1    
                   

DDR-5

There appears to have been an early version of the DDR-5 receivers called just "DDR-5".  Note the different appearance of the HFR and HFS units in some of the photos.  Indirect evidence from comparing various photos suggest that these two models were just renamed DDR-5A (dual) and DDR-5B (single).

ddr5_front_closeup.jpg (913807 bytes) ddr5_single_cab_early_vers.jpg (557423 bytes) ddr-5_front.jpg (773091 bytes) ddr-5_front_open2.jpg (635757 bytes)
  621.26-2  This appears to be the earliest version of the DDR-5 for which there is a photo. Note that the HFR was quite different in later versions. no info on photo 625.12-2

 

DDR-5A

This is the original dual-diversity version of the receiver.  It has only one HFS Synthesizer, so both halves of the receiver must be tuned to the same frequency, when the synthesizer is in use, so this is a "spatial diversity" receiver.

Left Rack Right Rack
HFR-1 RF Tuner HFR-1 RF Tuner
HFS-1 Synthesizer DVM-4 Diversity Monitor
  Blank Panel
AFC-3 AFC Cntl Unit AFC-3 AFC Cntl Unit
HSP-2 Audio Switch Panel Blank Panel
HFI-1 IF Amp HFI-1 IF Amp
HNF-1 Variable Notch Filter HNF-1 Variable Notch Filter
HFA-1 Detector and Audio Amp HFA-1 Detector and Audio Amp
HAF-1 Audio Filter HAF-1 Audio Filter
HFP-1 Power Supply HFP-1 Power Supply
HSS-1 Speaker Panel HSS-1 Speaker Panel
HPP-1 Power Panel Blower

 

ddr-5_overall.jpg (838560 bytes) ddr-5_front.jpg (773091 bytes) ddr-5a_rear.jpg (703317 bytes) ddr-5_front_open1.jpg (619240 bytes)
Un-numbered color photo of DDR-5A Also un-numbered, this photo may be of an early version of the "A"; note the metal rings around the HFR's left dial, the absence of the HPP-1 power panel at the bottom of the left rack, and the 2-speaker panel in place of an HSS-1 625.12-7  Rear of DDR-5A rack. 625.12-1 Another shot of the early 'A', with bottom doors closed.
ddr-5_front_open2.jpg (635757 bytes) ddr-5a_rear_open.jpg (617753 bytes)    
625.12-2.  Yet another shot of the earl 'A'. 625.12-6  Early 'A' rear view with doors shut.    
       

DDR-5B

The "B" model is the single-rack, non-diversity, version of the "A".

Configuration
HFR-1 RF Tuner
HFS-1 Synthesizer
AFC-3 AFC Cntl Unit
HSP-2 Audio Switch Panel
HFI-1 IF Amp
HNF-1 Variable Notch Filter
HFA-1 Detector and Audio Amp
HAF-1 Audio Filter
HFP-1 Power Supply
HSS-1 Speaker Panel
HPP-1 Power Panel

 

ddr-5b_overall1.jpg (584262 bytes) ddr-5b_rack_front.jpg (575525 bytes) ddr-5b_rear_open.jpg (564020 bytes) ddr-5b_tools.jpg (644008 bytes)
629.14-2  DDR-5B 6310.11-2  DDR-5 Rack, front 626.27-4  DDR-5B Rack, rear. Special tools for DDR-5.
       

DDR-5C

This version of the receiver is a full frequency/spatial diversity configuration with two independent synthesizers.  Where the "A" version has only a single HFS to lock both of its HFR's to the same frequency, the "C' radio has two synthesizers.. essentially two independent synthesized receivers.

Left Rack Right Rack
HFR-1 RF Tuner HFR-1 RF Tuner
HFS-1 Synthesizer HFS-1 Synthesizer
AFC-3 AFC Cntl Unit AFC-3 AFC Cntl Unit
HSP-2 Audio Switch Panel Blank Panel
HFI-1 IF Amp HFI-1 IF Amp
HNF-1 Variable Notch Filter HNF-1 Variable Notch Filter
HFA-1 Detector and Audio Amp HFA-1 Detector and Audio Amp
HAF-1 Audio Filter HAF-1 Audio Filter
HFP-1 Power Supply HFP-1 Power Supply
HSS-1 Speaker Panel HSS-1 Speaker Panel
HPP-1 Power Panel Blower

 

ddr-5c_front.jpg (758378 bytes) ddr-5c_front_swingout.jpg (795379 bytes) ddr-5c_overall.jpg (755399 bytes)  
637.9-1  DDR-5C front. 637.9-3  DDR-5C with HFI swung out. 637.9-2  DDR-5 overall view.  
       
       

DDR-5H

This version is a single-rack diversity receiver with 2 sets of 4 independent sidebands (MSA's).

Configuration ddr-5h_overall.jpg (521368 bytes) ddr-5h_front.jpg (580779 bytes)

643-25-1

HFR-1A RF Tuner
HFR-1A RF Tuner
HFS-1 Synthesizer
MSA-1 Multiple Sideband Adapter
MSA-1 Multiple Sideband Adapter
MCG-1 Mux Carrier Generator
HFP-1 Power Supply
MHPA-1 Dual Power Supply

DDR-5K (AN/FRR-74)

This version is a single-rack non-diversity rig, configured to receive 4 independent sidebands.

Configuration DDR-5K Configuration DDR-5KA
HFR-2 RF Tuner HFR-2 RF Tuner
HFS-1 Synthesizer HFS-1 Synthesizer
AFC-3 AFC Cntl Unit AFC-3 AFC Cntl Unit
MSA-1 Multiple Sideband Adapter MSA-1 Multiple Sideband Adapter
MCG-1 Mux Carrier Generator MCG-1 Mux Carrier Generator
HNF-1 Variable Notch Filter HNF-1 Variable Notch Filter
HSS-8 Speaker Panel HSS-8 Speaker Panel
MFP-1 Power Supply MFP-1 Power Supply
HFP-1 Power Supply HFP-1 Power Supply
HPP-1 Power Panel  

 

ddr-5k_front.jpg (421241 bytes) ddr-5k_overall.jpg (490501 bytes) ddr-5k_rear_left.jpg (569812 bytes)  
6511.11-5  DDR-5KC front 657.8-3  DDR-5K overall view. 657.8-4  Rear view of DDR-5K rack.  
ddr-5ka_front.jpg (516377 bytes) ddr-5ka_overall.jpg (545795 bytes) ddr-5ka_rear.jpg (639847 bytes)  
6511.11-5  DDR-5KA front view. 6511.11-6  DDR-5KA oblique view. 6511.11-7  DDR-5KA rear view.  
       

DDR-5L

The '5L is the diversity version of the 5K.  It can receive two sets of 4 independent sidebands, or using the common synthesizer, one set of 4 independent sidebands in spatial diversity.

Left Rack Right Rack
HFR-1A RF Tuner HFR-1A RF Tuner
HFSR-1 Synthesizer Blank Panel
AFC-3 AFC Cntl Unit AFC-3 AFC Cntl Unit
MSA-1 Multiple Sideband Adapter MSA-1 Multiple Sideband Adapter
MCG-1 Mux Carrier Generator MCG-1 Mux Carrier Generator
Blank Panel BSP-6P Bridging Speaker Panel
HFA-1 Detector and Audio Amp HFA-1 Detector and Audio Amp
HFP-1 Power Supply HFP-1 Power Supply
Blank Panels Blank Panels
HPP-1 Power Panel Blank Panels
ddr-5l_overall_txt.jpg (1283099 bytes) ddr-5l_cable_closeup.jpg (911924 bytes) ddr-5l_ax-390.jpg (850691 bytes)  
Scan of manual page for DDR-5L. 655.24-3  Close-up of cabling. 655.26-7  AX-390 in DDR-5L Blower.  
       

DDR-5 Special

This receiver was one of probably many "special" configurations.  This particular one has only an HFR, HFS, HFI, and HFP.  The detector must have been customer supplied, and there was no AFC.

ddr-5_special_front.jpg (513218 bytes)

Photo 644.6-6

DDR-50

The DDR-50 is a single-rack spatial diversity receiver with 2 HFR's locked to a single HFS.  IF amplifiers, filters, detectors, and audio amps are implemented in this radio with SBS's.

Configuration ddr-50_front.jpg (502335 bytes)

D648.14-2

HFR-1 RF Tuner
HFS-1 Synthesizer
HFR-1 RF Tuner
HSP-2 Audio Switch Panel
AFC-2 AFC Cntl Unit
SBS-1 Sideband Adapter
AFC-2 AFC Cntl Unit
SBS-1 Sideband Adapter
HFP-1 Power Supply
HSS-2 (?) Speaker
HPP-1 Power Panel

DDR-51

The DDR-51, like the '50, is a spatial diversity receiver that also uses a pair of HFR's with AFC's, sharing a single synthesizer.  In this receiver, however, MSA's and MCG's are used as IF and audio components.

Configuration ddr-51_front.jpg (490439 bytes)

D648.14-1

HFP-1 Power Supply
HFP-1 Power Supply
HFR-1 RF Tuner
HFS-1 Synthesizer
HFR-1 RF Tuner
AFC-2 AFC Cntl Unit
MSA Multiple Sideband Adapter
AFC-2 AFC Cntl Unit
MSA Multiple Sideband Adapter
MCG Mux Carrier Generator
MCG Mux Carrier Generator
HPP-1 Power Panel

DDR-52

This version is a non-diversity reciver using an MSA/MCG IF/Detector assembly.

Configuration ddr-52_overall.jpg (617540 bytes)

642.8-16

HFR-1 RF Tuner
HFS-1 Synthesizer
MSA-1 Multiple Sideband Adapter
AFC-3 AFC Cntl Unit
MCG-1 Mux Carrier Generator
HSP Audio Switch Panel
HFP-1 Power Supply
HSS-2 (?) Speaker
HPP-1 Power Panel

DDR-55

This version appears to be a dual-diversity configuration in a single cabinet.  I don't have photos of the '55.

Configuration
HFR-2 RF Tuner
HFR-2 RF Tuner
HFS-1 Synthesizer
AFC-5 Automatic Freq Controller
AFC-5 Automatic Freq Controller
HSS-4 Speaker
MSA-1 Multiple Sideband Adapter
MSA-1 Multiple Sideband Adapter
MCG-1 Mux Carrier Generator
MCG-1 Mux Carrier Generator
HFP-1 Power Supply
MHPA-1 Multiple Power Supply

DDR-501

In this receiver, the manually tuneable HFR is replaced with an HFF, an RF unit that provides 8 preset, fixed-tuned receive frequencies.  The -501 receives 4 independent sidebands in a non-diversity configuration.

Configuration ddr-501_overall.jpg (593526 bytes)

642.8-14

HFF Fixed-tuned RF Unit
HFS Synthesizer
MSA-1 Multiple Sideband Adapter
AFC AFC Control Unit
MSG-1 Mux Carrier Generator
HSP Audio Switch Panel
HFP-1 Power Supply
HSS-2 (?) Speaker
HPP-1 Power Panel

DDR-551

The DDR-551 is a non-diversity configuration that uses an SBS dual-channel IF/detector.

Configuration
HFR RF Tuner
HFS Synthesizer
SBS-1 Multiple Sideband Adapter
HSS-2 (?) Speaker
HFP-1 Power Supply
HPP-1 Power Panel
ddr-551_overall_left.jpg (669937 bytes) ddr-551_overall_open.jpg (740975 bytes) ddr-551_overall_partly_closed.jpg (657727 bytes) ddr-551_overall_right.jpg (719413 bytes)
643.13-2 648.19-2 648.19-1 543.13-3

DDR-5 Mystery Radios

In the photo stash there are several photos of DDR-5's that I cannot match up with any known configurations.  

This version appears to be a single-rack diversity receiver, without a synthesizer.  It has two complete receivers, each consisting of an HFR, an AFC freq control, and an SBS multiple sideband adapter.  There must be a power supply, or two, but they must be mounted in the rear of the rack. ddr-5_unk_vers1.jpg (628036 bytes)

642.8-11

Configuration
HFR RF Tuner
SBS-1 Multiple Sideband Adapter
AFC Automatic Freq Control
HFR RF Tuner
SBS-1 Multiple Sideband Adapter
AFC Automatic Freq Control
HSP Audio Switch Panel
HSS-8(?) Dual Speaker Panel
HPP-1 Power Panel

 

Like the above mystery radio, this one appears to be a diversity set with no synthesizer, but is uses the MSA/MCG multiple sideband adpaters instead of the SBS. ddr-5_unk_ver5.jpg (607015 bytes)

642.8-8

Configuration
HFR RF Tuner
MSA Multiple Sideband Adapter
AFC Automatic Freq Control
MCG Multipler Carrier Generator
HFR RF Tuner
MSA Multiple Sideband Adapter
AFC Automatic Freq Control
MCG Multipler Carrier Generator
HFP Power Supply
HPP Power Panel

 

This radio is very similar to the DDR-5B, but seems to have a different audio switch panel.  Examination of the photo shows that the tags have military designations. ddr-5_unk_vers2.jpg (516665 bytes)
Configuration
HFR RF Tuner
HFS Synthesizer
AFC Automatic Frequency Control
(?) Audio Switch Panel, but not HSP
HFI IF Amp
HFA-1 Detector and Audio Amp
HAF-1 Audio Filter
HFP-1 Power Supply
HSS-? Speaker Panel
HPP-1 Power Panel

 

This configuration is similar to the DDR-5K, but.. not quite the same.  It has no MFP power supply. ddr-5_unk_vers4.jpg (611008 bytes)
Configuration
HFR RF Tuner
HFS Synthesizer
MSA Multiple Sideband Adapter
AFC Automatic Freq Control
MCG Multiple Carrier Generator
HAF Audio Filter
HFP Power Supply
HSS-8(?) Speaker Panel
HPP Power Panel

 

This radio is very similar to the DDR-5M.  It's a diversity set with 2 tuners, 2 synthesizers, and 2 MSA/MCG sets.  It differs from the -5M in its speakers, and in having a pair of HAF's installed as well ddr-5_unk_ver6.jpg (792719 bytes)

642.8-2

Configuration
HFR RF Tuner HFR RF Tuner
HFS Synthesizer HFS Synthesizer
MSA Multiple Sideband Adapter MSA Multiple Sideband Adapter
MCG Multiple Carrier Generator MCG Multiple Carrier Generator
HAF Audio Filter HAF Audio Filter
HFP Power Supply HFP Power Supply
LSP-7 Dual Speaker LSP-7 Dual Speaker
HPP Power Panel  

 

This configuration is similar to both the DDR-5L and DDR-5P with some detailed differences.  It appears to be a dual-diversity radio with MSA/MCG IF/Detector Systems. ddr-5_unk_ver7.jpg (828278 bytes)

6512.9-8 (Dec 22, 1966)

Configuration

HFR RF Tuner HFR RF Tuner
HFS Synthesizer HFS Synthesizer
AFC Automatic Freq Control AFC Automatic Freq Control
MSA Multiple Sideband Adapter MSA Multiple Sideband Adapter
MCG Multiple Carrier Generator MCG Multiple Carrier Generator
HFP Power Supply HSS-? Dual Speaker
HFP Power Supply HFP Power Supply
   

 

This version is a "miniature" single-rack receiver.  No markings or info on the photo ddr-5_small_unknown.jpg (597097 bytes)

 

Configuration
HFR RF Tuner
HFS Synthesizer
SBS-1 Multiple Sideband Adapter
HFP Power Supply
HSS-8(?) Dual Speaker Panel

 

Remotely Tuned DDR-5's

In the mid-sixties the Navy and other agencies (notably NASA) developed requirements for remotely tuned equipment, which lead to TMC's development of the so-called Technimatic equipment.  The DDR-5's were among the first TMC systems to be provided with remote controls.  Early nomenclature wasn't absolutely consistent, so for example, there is a DDR-5BR (remote version of the DDR-5B), but later the remotely tuned radios started to be listed as DDRR-5x.

The HFR, HFS, HFA, HFI units of DDR-5 spawned new remotely-tuned versions HFRR, HFSR, HFAR, HFIR, and so forth.  Their appearance from the front panel is identical to their manually-tuned versions.  Viewed from the rear, however, rows of Ledex rotation actuators is a tip-off that you're looking at an "xxxR" unit.  In addition to the "R" versions, some of the DDR-5 modules morphed into "A" versions, for example the MSAA, MCGA and so forth, presumably for "Automatic".

The remote control systems used the following additional units to handle data reception, decoding, and storage:

Module Picture Function
RTTD rttd-1_front.jpg (375056 bytes) Data decoder/receiver.  This unit received data from the remote controller via a teletype land line, decoded the commands, and stored them into the RTMU.  RTTD-1 shown.
RTMU rtmu-2_front.jpg (415443 bytes) Signal Data Converter-Storer. This unit received digital commands from the RTTD, stored the commands in a digital memory, performed decoding functions, and drove the various xxxR units in the receiver.  RTMU-1 shown.
LRCB lrcd-1_front.jpg (279751 bytes) Control Terminator, used in the DDRR-506.  This photos is actually of an LRCD-1, but the LRCB is identical in appearance.
     

The operator end of the remote tuning systems included the ARCx units.

ARCA Automatic Receiver Remote Control System, Tape

ray_technimatic.jpg (645125 bytes) rtph-1_overall_left.jpg (566400 bytes) rtia-1_rtib-1_front.jpg (656727 bytes) rtky_front.jpg (528815 bytes)
R6412.2-8.  Photo of Ray deP with an unknown associate at the controls of an ARCA-1 receiver Technimatic remote control system.  This ARCA-1 has 1 RTPA-1 Electronic Programmer, 3 RTIA-1 Channel Indicators, and an RTKY-1 Paper Tape Reader/Punch. 667.13-3.  This photo is actually an RTPH, but the RTPA-1 that is used in the ARCA-1 is almost identical in appearance. 654.2-3.  The bottom unit in this photo is an RTIA-1. No number.  RTKY-1 Paper tape reader/punch.

Overview

The following chart lists the various remote-controlled DDR-5 configurations.

Type Tuner Synthesizer AFC IF/Audio/Filter Spkr Pwr Sup AC Pwr Panel Remote Cntl Other Dwg
DDR-5BR HFRR-2 HFSR-1 AFCR-3 HFIA-1, HFAR-1A, HAFR-1 HSS-3 HFP-1   RTMU-1, RTTD-1 RGCB-1, AK-101 ddr-5br_dwg.jpg (1576016 bytes)
DDR-5BR1 HFRR-2B HFS-1 AFCR-3 HFIA-1, HFAR-1A, HAF-1 HSS-3 HFP-1   RTMU-2, RTTD-1 RGCB-1, AK-101  
DDR-5N 2xHFR-2 HFS-1   2xMSA-1, 1xMCG-1, 2xHFP-1, 1xHSP-2 2xBSP-2 2xHFP-1   RTMU-1, RTTD-1 4xDVC-1  
DDR-504 HFRR HFSR   HFIR, HFAR, HAFR, HFP HSS PSP-1   RTMU-1, RTTD-1 CFA-1  
DDR-506 8xHFRR-3 8xHFSR-1 8xAFCR-3 8xMSAA-1, 8xMCGA-1   12xHFP-1   8xLRCB-1 FACA-1 (?)  
DDR-552 HFRR-2 HFSR-1 AFC-3 HFIR, HNF, HFAR, HAF   HFP-1   RTMU-1, RTTK-1, RTPP    
DDRR-5B HFRR-2 HFSR-1 AFC-3 HFIR-1, HNF-1, HFAR-1, HAF-1 HSS-3 HFP-1   RTMU-1, RTTD-1   ddrr-5b_dwg.jpg (1398590 bytes)
DDRR-5B1 HFRR-2 HFSR-1 AFC-3 HFIR-1, HFN-1, HFA-1, HAFR-1, HSP-2 HSS-6 HFP-1   RTMU-1, RTTD-1    
DDRR-5C 2xHFRR-2 2xHFSR-1 2xAFC-3 2xHFIR-1, 2xHNF-1, 2xHFAR-1, 2xHAF-1 2xHSS-3 2xHFP-1   2xRTMU-1, 2xRTTD-1    
DDRR-5K HFRR-2 HFSR-1 AFC-3 MSA-1, MCG-1 1x(?) HFP-1   RTMU-1, RTTD-1   ddrr-5k_dwg.jpg (1356944 bytes)
DDRR-5L 2xHFRR-2 HFSR-1 2xAFC-3 2xMSA-1, 2xMCG-1 1x(?) 2xHFP-1   RTMU-1, RTTD-1 RSTA-1 (?) ddrr-5l_dwg.jpg (1394170 bytes)
DDRR-5M 2xHFRR-2 2xHFSR-1 2xAFC-3 2xMSA-1, 2xMCG-1 BSP-6B 2xHFP-1   2xRTMU-1, 2xRTTD-1   ddrr-5m_dwg.jpg (1403945 bytes)
DDRR-5N 2xHFRR-2 HFSR-1   2xMSA-1, 1xMCG-1, 1xHSP-2 2xBSP-2 2xHFP-1   RTMU-1, RTTD-1 4xDVC-1 ddrr-5n_dwg.jpg (1647324 bytes)
DDRR-5P 2xHFRR-2 2xHFSR-1 2xAFC-3 2xMSA-1, 2xMCG-1 1x(?) 2xHFP-1   RTMU-1, RTTD-1   ddrr-5p_dwg.jpg (1295153 bytes)
DDRR-5Q HFRR-2 HFSR-1   MSA-1 HSSR-5 HFP-1   RTMU-1, RTTD-1    
DDRR-5R HFRR-2 HFSR-1   MSA-1, MCGR-1 HSS-4 HFP-1   RTMU-1, RTTD-1 CFA-1 ddrr-5r_dwg.jpg (1447086 bytes)
DDRR-5S HFRR-2 HFSR-1   SBS-1, RMXI-2 HSS-4 HFP-1   RTMU-1, RTTD-1 CFA-1  
DDRR-5T HFRR-2 HFSR-1   HFI-1, HFA-1, RMXI-2   HFP-1   RTMU-1, RTTD-1    
DDRR-5W HFRR-( ) HFSR-1 AFC-3 HFIR-2, HFA-1    HFP-1 HPP-1 RTMU-3, RTTD-3    
                     
                     

DDRR-5B

This version is the remotely tuned version of the single-rack, non-diversity DDR-5B.  This receiver appears to have been configured in several alternate ways, including the DDRR-5B1.  There were early versions of this receiver, again with slightly different configurations, designated the DDR-5BR and DDR-5BR1..

Configuration DDRR-5B Configuration DDRR-5B1 Configuration DDR-5BR Configuration DDR-5BR1
RTTD-1 Data Decoder/Receiver RTTD-1 Data Decoder/Receiver RTTD-1 Data Decoder/Receiver RTTD-1 Data Decoder/Receiver
HFRR-2 RF Tuner HFRR-2 RF Tuner HFRR-2 RF Tuner HFRR-2B RF Tuner
HFSR-1 Synthesizer HFSR-1 Synthesizer HFSR-1 Synthesizer HFS-1 Synthesizer
AFC-3 Automatic Freq Control AFC-3 Automatic Freq Control AFCR-3 Automatic Freq Control AFCR-3 Automatic Freq Control (remote version!)
HSS-6 Speaker HSS-6 Speaker HSS-3 Speaker HSS-3 Speaker
HFIR-1 IF Amp HSP-2 Audio Switch Panel HFIA-1 IF Amp HFIA-1 IF Amp
HFA-1 Detector & Audio Amp HFIR-1 IF Amp HFAR-1A Detector & Audio Amp HFAR-1A Detector & Audio Amp
HAFR-1 Audio Filter HFN-1 Variable Notch Filter HAFR-1 Audio Filter HAF-1 Audio Filter (non-remote)
HFN-1 Variable Notch Filter HFA-1 Detector & Audio Amp RGCB-1 Remote Gain Control RGCB-1 Remote Gain Control
HFP-1 Power Supply HAFR-1 Audio Filter HFP-1 Power Supply HFP-1 Power Supply
RTMU-1 Data Converter/Storer HFP-1 Power Supply RTMU-2 Data Converter/Storer RTMU-2 Data Converter/Storer
  RTMU-1 Data Converter/Storer AK-101 Isolation Keyer AK-101 Isolation Keyer

 

ddrr-5b_front.jpg (508553 bytes) ddrr-5b_front_closed.jpg (630658 bytes) ddrr-5b_front_open.jpg (610772 bytes) ddrr-5b_rear.jpg (735279 bytes)
646.10-3.  DDRR-5B described on back of photo as "incomplete".  There appears to be no RTMU at the bottom. 6411.2-3  DDRR-5B with rack door closed. 6411.2-1  DDRR-5B with rack doors open. 652.18-11.  DDRR-5B rear view.
ddrr-5b_rear_left.jpg (833053 bytes) ddrr-5b1_front.jpg (814477 bytes) ddrr-5b1_w_arcd-1.jpg (855846 bytes) ddr-5br1_front.jpg (412081 bytes)
652.18-11.  DDRR-5B from left rear. DDRR-5B1 front view. DDRR-5B1 with ARCD-1 remote controller. 662.18-7.  DDR-5BR1 front view.
ddrr-5b1_overall.jpg (995130 bytes) ddr-5br1_overall.jpg (422394 bytes) ddr-5br1_rear.jpg (512931 bytes) ddr-5br_overall.jpg (396327 bytes)
DDRR-5B1 shown on the production line, with an ARCD-1 at the right, and a DDR-10 of some flavor on the left. DDR-5BR1 annotated photo. 662.18-10.  DDR-5BR1 rear view. DDR-5BR overall view.
       

DDRR-506

This monster (referred to sometimes as the DDR-506) was built for NASA and deployed on the tracking ships used for the Apollo program.  The radios were a backup system to be used in case the satellite-based data link failed.  Evidently the satellite system failed during at least one of the moon missions, and this receiver was used to receive, download, and then uplink the lunar injection burn data for the spacecraft.  Quite an accomplishment for an HF link!

The radio consists of 8 separate receivers, all remotely controllable.  The NASA receivers, and their parts, are easily identifiable, as they are painted a bilious green color, rather than the usual "TMC gray".

Configuration
LRCB-1 Control Terminator LRCB-1 Control Terminator MSAA-1 Multiple Sideband Adapter LRCB-1 Control Terminator LRCB-1 Control Terminator
LRCB-1 Control Terminator LRCB-1 Control Terminator MSAA-1 Multiple Sideband Adapter LRCB-1 Control Terminator LRCB-1 Control Terminator
HFRR-3 RF Tuner HFRR-3 RF Tuner MSAA-1 Multiple Sideband Adapter HFRR-3 RF Tuner HFRR-3 RF Tuner
HFSR-1 Synthesizer HFSR-1 Synthesizer MSAA-1 Multiple Sideband Adapter HFSR-1 Synthesizer HFSR-1 Synthesizer
AFCR-3 Automatic Freq Control AFCR-3 Automatic Freq Control MSAA-1 Multiple Sideband Adapter AFCR-3 Automatic Freq Control AFCR-3 Automatic Freq Control
MCGA-1 Multiple Carrier Generator MCGA-1 Multiple Carrier Generator MSAA-1 Multiple Sideband Adapter MCGA-1 Multiple Carrier Generator MCGA-1 Multiple Carrier Generator
HFP-1 Power Supply HFP-1 Power Supply MSAA-1 Multiple Sideband Adapter HFP-1 Power Supply HFP-1 Power Supply
HFRR-3 RF Tuner HFRR-3 RF Tuner MSAA-1 Multiple Sideband Adapter HFRR-3 RF Tuner HFRR-3 RF Tuner
HFSR-1 Synthesizer HFSR-1 Synthesizer FACA-1 (not sure about this one) HFSR-1 Synthesizer HFSR-1 Synthesizer
AFCR-3 Automatic Freq Control AFCR-3 Automatic Freq Control HFP-1 Power Supply AFCR-3 Automatic Freq Control AFCR-3 Automatic Freq Control
MCGA-1 Multiple Carrier Generator MCGA-1 Multiple Carrier Generator HFP-1 Power Supply MCGA-1 Multiple Carrier Generator MCGA-1 Multiple Carrier Generator
HFP-1 Power Supply HFP-1 Power Supply HFP-1 Power Supply HFP-1 Power Supply HFP-1 Power Supply
    HFP-1 Power Supply    

 

ddr-506_overall_color.jpg (824365 bytes) ddrr-506_center_front.jpg (755989 bytes) ddrr-506_nasa_overall.jpg (731534 bytes) ddrr-506_front.jpg (778123 bytes)
Color shot showing the front panel of the 5-rack DDRR-506 (also sometimes referred to as the DDR-506). Closeup of the '506 showing mainly the center rack with its array of 8 MSAA-1's. Annotated photo of the '506. Front view of the '506.
ddrr-506_control_head.jpg (722790 bytes) lrcc-1_overall_color.jpg (686289 bytes)    
Operator's console for the DDR(R)-506, consisting mainly of 8 LRCC-1's. Color shot of the LRCC-1's.