MILITARY COLLECTOR GROUP POST, Aug. 13/98 Index: TRP-4, MYSTERY JAPANESE GREEN RADIO; From Breck Smith MEMBERS WRITE; R-2174(P)/URR (Racal RA-6790-GM)? Weird BC-221, PRC-10 MWO's? MUSEUM DOWNSIZING LIST UPDATE; NON-MEMBER STUFF; HUMOR; *********************************************** TRP-4, MYSTERY JAPANESE GREEN RADIO; From Breck Smith Information follows on Japanese radio that I am trying to obtain information on. TRP-4 made by OKI Electric Co. Ltd, Tokyo Japan. The 10.5 inch x 5 in x 10 in chassis has the words TYPE TRP-4 SSB- TRANSCEIVER in the upper left of the front control panel above the first row of controls. Length measurements are without the battery box which extends the length another 3 inches. On the bottom is a placard with the same info but has a design #31085 and what appears to be a date of 1963.1 and SN of S-3587. The unit is sort of a strange green, the contols look like PRC-10 items, there are corner posts that extend out from the corners to protect the unit just like the PRC-10 , the unit has two standard audio connectors on the left side, one above the other and accepts standard handsets(H-33 etc). There are two rows of controls that are next to each audio connector and go across the front panel. The first row has a PUSH ON button for keying, a large volumn control, a stardard square meter(marked with the OKI symbol ) an ANT TUNE, Knob and a large recepticle for a ROD ANT(again like a PRC-9). The second row of controls next to the audio connector are a SYSTEM SWITCH marked off,rec, Send-A1, RT and ANT TUNE, then there is a CLARIFIER knob and a channel select know which selects 6 crystal controlled channels. Below the rod antenna is a Aux antenna connector with a small nut to hold the wire and a ground connector marked "E" The unit is functional and runs off of 7.5 VDC with the chassis being at a positive potential(being familiar with 1960's vintage japanese radios I checked this before the smoke test!) The unit is solid state and has a high voltage switching power supply in the battery box which is attached to the bottom of the radio with 6 hasp fasteners over center fasteners. The power supply appears to run best at 7.5 volts and as the voltage input is increased the interior section starts to regulate at 7.5, maybe the unit is designed for 12 volts but I was afraid to try any higher once I got the thing working. As you drop below 7.5 all the low voltages drop so the regulator is set for 7.5. High voltages measured were in the 200 volt range. On transmitt one bias voltage is generated in the the -26 volt range. Inside the battery box/ power supply, it has the label of DC-DC converter and also has terminals for the "hand crank generator". There is a large two wire military connector on the side and I tried a cannon connector shell on the threads and it fit. The battery box connects to the R/T unit with a bundle of blue wires, all the same color. The battery box is sectional with one section for a battery and other section contains the switching power supply(solid state) and a relay. Alone the center of the box is a divider which contain the plug, and four conecters with nuts , the center of which is red and black. The unit was tested and operates from 2.8 up through 8 mcs and is on LOWER SIDEBAND. The IF is 455 kcs. The channels appear to be frequency sensitive, you can only operate 2.8 mcs on the lower channels and say 7.1 mcs on the upper channels. The final amplifier is a tube type 5A6 on which I have no information.. Current draw is 20 to 50 mills with signal being received and on transmitt is approximate 2 amps. Inside the R/T unit are two sections, receive and transmitt. The receive section has a large 1 inch by 2.5 in filter labeled CM filter and has a DATE of 9-62 which confirms the previously mentioned date. The interior has not been sprayed or painted with any sort of anti -moisture or fungus material. The connector on the rear of the RT unit mates with the power supply cable and the connecor has three rows of pins , looks very similiar to R-174 receiver(ANGRR-5) but is larger has more pins. The receiver is contructed of three main boards one on top and the other is on the bottom, a small audio board is mounted on the side. The boards are soldered/hardwired. The RF section has two small air variables , and six trimmers for the channels. The entire RF section is hard wired, no boards, there are 6 cystals and standard HC-25 ceramic sockets and have a retaining clamps with a thumb screw. On the top of the retaining clamp for the crystals is a label" 2NDOSC(X-TAL). There is a single RT relay mounted below the airvariables and it is enclosed in clear plastic but is soldered in place, no socket. The ANT TUNE control on the front appear to operate a large slug that goes in and out of a three inch tube with wrapped turns to tune the antenna. Next the the final tube which has a shield are two more trimmers marked 5 and 6. Any info would be appreciated Breck K4CHE, Dover Delaware Ed) The 5A6 is the same output tube as used in PRC's 8, 9, & 10. This would place the RF output of the set around 4-5 watts PEP. A most interesting set, it's a shame you weren't able to get some clue from the person you purchased it from as to how it got to this country. If it has any crystals still in it you might check their frequency to get an idea of what type service it had been used in. *********************************************** MEMBERS WRITE; R-2174(P)/URR (Racal RA-6790-GM)? Can anyone tell me about all the bandwidth or filter combinations available for the R-2174(P)/URR receiver (Racal RA-6790-GM)? Is there a VLF convertor? (most only cover 0.5-30 MHz) Is there a VHF-UHF convertor? Thanks, Jay Coote W6CJ jcoote@aol.com ---------------------------------------------------------------------------------- Weird BC-221, Hi, Dennis, I have a weird BC-221. Unlike every other one I have ever seen, this one is not in the vertical metal or wood case. It is in a horizontal case only about two inches deeper than the normal case. The front door has the calibration book just like we would expect. There is a back cover held on by four screws and a four-pin male recessed Jones plug on the upper rear corner of the right side. Inside the rear compartment are two ballast tubes and an empty tube socket and an empty lamp socket for a screw base lamp. The main case has four brackets with holes and clips for some kind of a shock mount. The main chassis is a BC-221-AH and appears to be in excellent condition but is missing one tube and the crystal. Anyone have an idea what this was used for? It is the only one that I have ever seen. Makes me wonder if it was an effort to provide something like the LM. It was obviously manufactured this way. Lenox Carruth, Jr. carruth@geo-thermal.com ---------------------------------------------------------------------------------- PRC-10 MWO's? Hi Dennis, I have a PRC-10 with the following stenciled on the exterior. Can you or any of the group members tell me what they mean? MWO-11-5820-292-40/1 Applied MWO-11-612-2 Applied MWO-11-612-3 Applied MWO-11-612-6 Applied MWO-11-612-7 Applied Best Regards, David Ward Ed) MWO's are "Modification Work Orders" that are made to equipment after it's distribution to the field. They may be as simple as adding a lock washer to a screw, or a major modifications of the equipment to conform to some new standard(like the code burst operation in GRC-109's). Complete listings of MWO can be found in DA Pam 310-4(which is a multi volume set of manuals). Typically though they are not easy to track down. While the above MWO's are listed in TM11-4065 C-3, PRC-10 Field Maint manual, it does not detail what they are. *********************************************** MUSEUM DOWNSIZING LIST UPDATE; The Louisiana Museum of Military History, due to financial realities will be will be moving to smaller quarters. We have been asked to help liquidate some of the Commo gear. Below is the first list of equipment that's been made available. If you have an interest in any item contact Joe below via email and he'll pass along any needed info. AM-1780, untested but good condition, $ 25 AS-2851, 30-80 log periodic complete, $ 125 BB-451, NOS with electrolyte kit, $ 185 BB-451, used, $ 100 CU-2267/GR, Five unit multicoupler - with two spare F-1482, $125 DY-105, untested but looks good, $ 45 DY-105, no dynamotor, $ 25 GRC-109, details in week or so MD-522, with cables, $ 100 PPS-4, complete except for optical sight, $ 300 PRC-25, with accessories, $ 300 PRC-41, with antenna / PP-3700 AC supply - working, $ 175 PRC-68, with handset, antenna and battery - working but a little rough, $200 PRC-68, with handset, antenna and battery - working, good condition, $ 235 PRC-77, with accessories, $ 350 PRC-90, with battery - working, $ 100 PRC-90, with battery - no 282.8 transmit, $ 50 PRR-9/PRT-4A, $ 50 R-442, working, good condition, $ 225 RT-524A, unchecked, $ 300 RT-524A, working, $ 500 RT-858/PPS-6, RT only, Make offer Russian 62R1, VHF cargo pocket transceiver with mike and dipole wire antenna - Make offer Russian R-105M, no accessories, $ 100 Russian R-108, no accessories, $ 100 TS-323, good condition, $ 35 TT-722/TG, Make Offer UGC-74 - Make offer Contact agent: Joseph W Pinner Lafayette, LA KC5IJD EMail: kc5ijd@sprintmail.com *********************************************** NON-MEMBER STUFF; I am a 2 -way radio dealer in Northern California located approximately 45 miles North of Sacramento. I received a request from a gentleman who has purchased a military surplus trailer that was used for communications equipment; the gentleman wishes to know what this trailer was used for. The Data obtained from the ID plates is as follows: Semi-Trailer, Van Electronic, 6 Ton, 2 Wheel M373A2C Contract #: DA-33-019-ORD-3001 Serial #: 62368 Gramm Trailer Corp. Manufactured: 5-30-60 Your assistance in identifying this piece of equipment would be greatly appreciated. Ernie Sakamoto Rising Sun Communications P. O. Box 2691 Marysville, CA 95901-2691 Office: 530-743-4996 FAX: 530-743-0860 E-Mail: rscomm@juno.com Pager: 916-816-5716 ---------------------------------------------------------------------------------- Sir, u e-mail address was given to me by Dave Stinson and he said to contact u for a piece of equipment I'm looking for. I'm trying to find a r-392 in gud condition that I can restore. Can u help?? Thank You Dave Faria WA5TEZ *********************************************** HUMOR; Daffynitions, ADULT: A person who has stopped growing at both ends and is now growing in the middle. BEAUTY PARLOR: A place where women curl up and dye. CANNIBAL: Someone who is fed up with people. CHICKENS: The only animals you eat before they are born and after they are dead. COMMITTEE: A body that keeps minutes and wastes hours. DUST: Mud with the juice squeezed out. EGOTIST: Someone who is usually me-deep in conversation. GOSSIP: A person who will never tell a lie if the truth will do more damage. HANDKERCHIEF: Cold Storage. INFLATION: Cutting money in half without damaging the paper. MYTH: A female moth. MOSQUITO: An insect that makes you like flies better. RAISIN: Grape with a sunburn. SECRET: Something you tell to one person at a time. SKELETON: A bunch of bones with the person scraped off. TOOTHACHE: The pain that drives you to extraction. TOMORROW: One of the greatest labor saving devices of today. YAWN: An honest opinion openly expressed. WRINKLES: Something other people have. You have character lines. ---------------------------------------------------------------------------------- A young lady had just visited her doctor and he informed her that she was pregnant. The young lady had been married for ten years and had wanted a baby very badly. As she sat on the bus, on her way home, she felt that she had to share the good news with someone. The gentleman sitting next to her seemed as good as anyone to share the good news with. Sir, she said, I just received the best news you could ever imagine. I have to share it with someone or I'll bust. She told him the news that the doctor had told her about being pregnant. The man shared her enthusiasm as he shared his experience. He said he was a farmer and he had trouble with his hens laying eggs. He stated that he went out to the hen house one morning and all of his hens had laid eggs. He was so happy. He added, "but confidentially, I changed cocks." The newly pregnant woman responded, "Confidentially, me too." ---------------------------------------------------------------------------------- A man was being interviewed for a job. "Were you in the service?" ask the interviewer. "Yes, I was a marine," responded the applicant. "Did you see any active duty?" "I was in Vietnam for 2 years and I have a partial disability." "May I ask what happened?" "Well, I had a grenade go off between my legs and I lost both testicles." "You're hired. You can start Monday at 10 am." "When does everyone else start? I don't want any preferential treatment because of my disability." "Everyone else starts at 7 am but I might as well be honest with you. Nothing gets done between 7 and 10. We just sit around scratching our balls trying to decide what to do first." ---------------------------------------------------------------------------------- from Tim K A married woman is having an affair. Whenever her lover comes over, she puts her nine-year-old son in the closet. One day the woman hears a car in the driveway and puts her lover in the closet, as well. Inside the closet, the little boy says, "It's dark in here, isn't it? "Yes it is," the man replies. "You wanna buy a baseball?" the little boy asks. "No thanks," the man replies. "I think you DO want to buy a baseball," the little extortionist continues. "OK. How much?" the man replies after re-considering the position he is in. "Twenty-five dollars," the little boy replies. "TWENTY-FIVE DOLLARS?!" the man repeats incredulously, but complies in order to protect his hidden position. The following week, the lover is visiting the woman again when she hears a car in the driveway and, again, places her lover in the closet with her little boy. "It's dark in here, isn't it?" the boy starts off. "Yes it is," replies the man. "Wanna buy a baseball glove?" the little boy asks. "Oh, allright. Well, how much?" the hiding lover responds, acknowledging his disadvantage. "Fifty dollars," the boy replies, and the transaction is completed. The next weekend, the little boy's father says "Hey, son. Go get your ball and glove and we'll play some catch." "I can't. I sold them," replies the little boy. "How much did you get for them?" asks the father, expecting to hear the profit in terms of lizards and candy. "Seventy-five dollars," the little boy says. "SEVENTY-FIVE DOLLARS?! That's thievery! I'm taking you to the church right now. You must confess your sin and ask for forgiveness," his father explains as he hauls the child away. At the church, the little boy goes into the confessional, draws the curtain, sits down, and says "It's dark in here, isn't it?" "Don't you start that crap in here now," the priest says. ---------------------------------------------------------------------------- from Victor A woman goes up to a man and asks, "Is it sexual harassment if a man comes up to you and tells you your hair smells good?" The man replies, "No." The woman then says, "What if he is a midget?" ----------------------------------------------------------------------------- "Raisin Bread" A general store owner hires a young female clerk with a penchant for very short skirts. One day a young man enters the store, glances at the clerk, and glances at the loaves of bread behind the counter. "I'd like some raisin bread, please." the man says politely. The clerk nods and climbs up a ladder to reach the raisin bread located on the very top shelf. The man, standing almost directly beneath her, is provided with an excellent view. As the clerk retrieves the bread, a small group of male customers gather around the young man, looking in the same direction. Pretty soon each person is asking for raisin bread, just to see the clerk climb up and down those stairs. After a few trips, the clerk is tired and irritated. She stops and fumes at the top of the ladder, glaring at the men standing below. She notices an elderly man standing amongst the throng. "Is yours raisin too?", the clerk yells at him testily. "No," croaks the feeble old man... "But it's startin' to twitch." *********************************************** (The preceding was a product of the"Military Collector Group Post", an international email magazine dedicated to the preservation of history and the equipment that made it. Unlimited circulation of this material is authorized so long as the proper credits to the original authors, and publisher or this group are included. For more information conserning this group contact Dennis Starks at, military-radio-guy@juno.com) ***********************************************