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Metalworking (rec.crafts.metalworking) Discuss various aspects of working with metal, such as machining, welding, metal joining, screwing, casting, hardening/tempering, blacksmithing/forging, spinning and hammer work, sheet metal work. |
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#41
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Height gages
axolotl wrote:
Wes wrote: I've never used or touched one but having read a lot of history books on the Vietnam era, Prick 77 comes to mind. Five mile range, no HF capability, not much of a radio. Who in the air could talk 30-76 MHZ FM? I know the F4-j/s's I worked on were UHF. CAS and liason aircraft might have used the Rockwell ARC-54. It may interest you to know the last PRC-77 left the Guard inventory a couple of years ago. Kevin Gallimore A couple years ago? That is pathetic. What happened to the mantra of we support our troops? Wes -- "Additionally as a security officer, I carry a gun to protect government officials but my life isn't worth protecting at home in their eyes." Dick Anthony Heller |
#42
Posted to rec.crafts.metalworking
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Height gages
On Sun, 13 Sep 2009 17:59:41 -0400, Wes wrote:
Gunner Asch wrote: What radio? I did electrical QA on the PRC-77. So YOU are the guy! Hummmm....well..its been a long time and I like you anyways I've never used or touched one but having read a lot of history books on the Vietnam era, Prick 77 comes to mind. Five mile range, no HF capability, not much of a radio. Who in the air could talk 30-76 MHZ FM? I know the F4-j/s's I worked on were UHF. Wes An utter utter piece of **** for use in the bush..and responsible for the deaths and maimings of many American kids http://en.wikipedia.org/wiki/AN/PRC-...le_Transceiver Gunner The current Democratic party has lost its ideological basis for existence. - It is NOT fiscally responsible. - It is NOT ethically honorable. - It has started wars based on lies. - It does not support the well-being of americans - only billionaires. - It has suppresed constitutional guaranteed liberties. - It has foisted a liar as president upon America. - It has violated US national sovereignty in trade treaties. - It has refused to enforce the national borders. ....It no longer has valid reasons to exist. Lorad474 |
#43
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Height gages
Gunner Asch wrote: On Sat, 12 Sep 2009 04:25:49 -0400, "Michael A. Terrell" wrote: Larry Jaques wrote: When I worked as a Quality Assurance inspector, I used the height gauges to check hole placement for the manpack radio chassis and other panels. Nowadays, if I had one, I might use it to scribe lines for hole placement, using the extra adaptor so it didn't cause damage to my tool. What radio? I did electrical QA on the PRC-77. So YOU are the guy! Hummmm....well..its been a long time and I like you anyways. Don't blame me. It was a crappy RCA NATO radio design that required every member nation to sign off on design changes. Even as a tech, I could have made a lot of improvements starting with a better transistor in the front end. Motorola was the only source, and it had been obsolete for several years when Cincinnati Electronics took over the contract from another company. Motorola agreed to make a batch, but wouldn't guarantee that they met Mil Spec. They shipped over 11,000 transistors to be tested in house in an attempt to get 10,000 that qualified. There were about a dozen manufacturers, including someone in Pakistan. It was early '60s germanium technology, at best. Crystal mixers to synthesize the Local Oscillators, and designed to replace the PRC-25, which replaced the PRC-10. It used the same battery, ignoring the 90 V B+ and operating the radio off what had been the filament supply. It used the same crappy Korean War carbon microphone handset and antennas. In other words, it was a low budget radio designed to replace crap that replaced crap. The only thing that it had going for it was module interchangability, implying that it could be serviced in the field by swapping modules. It was to be replaced by the PRC-70, that used modern ICs and digital synthesis to generate the Local Oscillators. They were intended for short range communications only. There were a few linear amplifiers built for them to put out something like 20 watts instead of a half watt. I saw a few at Cincinnati Electronics, along with the motorized antennas designed for tactically equipped Jeeps. BTW, that was the same place where a security guard accused me of stealing a 'GRC-106, Complete' and carrying it out of the plant in my shirt pocket. That was about 600 pounds of electronics, cables and spare parts. The head of security got mad when I laughed in his face. then I asked who made the complaint. He refused to tell me, so I asked how many were missing, and what were the serial numbers. Finally I explained that two, 'GRC-106, Complete' filled one pallet, and required a forklift to move. He wasn't amused, but called that department for conformation. He finally apologized. -- You can't have a sense of humor, if you have no sense! |
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