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#21
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In article ,
"Lynn Coffelt" wrote: (always a CRT for times when a half-hour disassembly and windex didn't get the cigarette smoke "fog" cleared up) Lynn, W7LTQ Reminds me of the first time I went on a Service Call on a Halibut Schooner. Skipper was an Old Norwegin, with a heavy accent. He watch me like a hawk, while I tried to figure out why the modulation was so poor. Finally I took the mic apart, and and found the cloth filter in front of the mic element, PLUGGED with snoose. Removed the "Snoose Filter" and reassembled the mic, and let the guy call his brother, out dragging on the Wasihngton Coast. 5 by 9 and strong voice was the reply. That old boy, keep saying the whole time I was onboard, "Thes radio, she never vorked, since they day I bought her, not ever....." When I went back onboard the next spring for the annual tuneup, the Old Boy, remembered me, and never even followed me up to the wheelhouse, and told the crew, "Now fella's there goes a REAL Radioman. He fixed the radio, last year, and she never vorked so good. Never since the day I bought her, not ever....." I can still remeber that guy even 35 years later. The moral to this story is, "Always check the Snoose Filter, if you got poor modulation" Bruce in alaska -- add a 2 before @ |
#22
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#23
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I worked at Raytheon in Seattle between Feb 1970 and Oct 1979. I sure remember Bill Pulse. Is he still with us? When I first applied to be an electronics technician, I interviewed with Bill. He rejected me. UG Allen at Raytheon hired me. I worked with the guys from G&L a lot.
I am now retired in Ironwood, Michigan. Yes, getting old is a bitch. I still remember the people and equipment like it was yesterday. Weigel |
#24
posted to rec.boats.electronics
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Koden MD-3600 Radar
In article ,
Edward Weigel wrote: Me Wrote: In article , "Lynn Coffelt" wrote: - Hmmmm......... The guys that showed me the ropes used a Simpson 260 with a battered leather case, an earphone and a wet finger. (Oh, yeah, as you mentioned, an NE-2 taped to the end of a diddle stick) Old Chief Lynn, Anacortes Marine Electronics (for 20 years)- What, you taped yours to a diddle stick??? We always just held them in our fingers out in front of the waveguide flange..... Well not on 40Kw Decca 404's.... but all the rest..... Hmmm, sounds like an old timer....The really good techs came from Northern Radio, Radar Electric, and Raytheon Marine back in the 60's and 70's. I am an old Northern Man, and one of the few "Old Boys" left. Don Hollingsworth Sr. is still around at G & L Marine, and he is a Raytheon transplant. Billy Pulse came from the end of the era Radar Electric shop. That's about it for that generation, that still practice the "Art" of Marine Electronics. Same with the "Regulators". (FCC) After the closing of RegionX in Kirkland, there just isn't anyone left that really understands the Marine Mobile Radio Service. Bob Dietch, Bob Zenes, Gary Solsby, Bill Johnson, and even Denny Anderson have all retired. Me getting old is a Bitch......all the good guys just die off.... worked at Raytheon in Seattle between Feb 1970 and Oct 1979. I sure remember Bill Pulse. Is he still with us? When I first applied to be an electronics technician, I interviewed with Bill. He rejected me. UG Allen at Raytheon hired me. I worked with the guys from G&L a lot. am now retired in Ironwood, Michigan. Yes, getting old is a bitch. I still remember the people and equipment like it was yesterday. it has been years, since I had thought of Old U.G. Allen..... but I remeber you, Ed. Can't picture you in my minds eye, but the name sure does resonate in the dusty memories. Yes, Billy Pulse is still around in Bellingham, WA and I talk to the Don's Sr & Jr at G & L Marine from time to time, especially when I get stumped on a Radar problem. Just had one of those last month. Had a Furuno 1941 start losing range over a month or so. Went from solid 36 Mile targets, down to barely 4 mile targets. Still had the OEM Magnitron and something like 6000 Operating Hours logged. So I figured, "tired Maggie" right? Replaced it, and no change. After looking at the Manual Receiver Tuning, and finding that I could run the Tuning Voltage from 5Vdc to 35Vdc with absolutly no change on the received targets, I got really suspicious of the MMIC Front-end. Pulled the T/R Pan and looked at the Tuning Voltage @ the inside of the feedthru Cap inside of the MMIC casting to make sure I just didn't have a broken wire somewhere. Since I didn't have a new MMIC, and also had no way to test the T/R Pan offline, I sent it down to Don Sr. and he did the replacement, and tested it on his testbed Radar Bench. Reinstalled, and have 36 mile targets again. That was the first time I have ever heard of a MMIC having that particular failure. (Tuning Line Voltage not actually tuning the LO in the MMIC) Live and Learn... Bruce in alaska -- add a 2 before @ |
#25
posted to rec.boats.electronics
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Koden MD-3600 Radar
"Bruce in Alaska" wrote in message ... In article , Edward Weigel wrote: Me Wrote: In article , "Lynn Coffelt" wrote: - Hmmmm......... The guys that showed me the ropes used a Simpson 260 with a battered leather case, an earphone and a wet finger. (Oh, yeah, as you mentioned, an NE-2 taped to the end of a diddle stick) Old Chief Lynn, Anacortes Marine Electronics (for 20 years)- What, you taped yours to a diddle stick??? We always just held them in our fingers out in front of the waveguide flange..... Well not on 40Kw Decca 404's.... but all the rest..... Hmmm, sounds like an old timer....The really good techs came from Northern Radio, Radar Electric, and Raytheon Marine back in the 60's and 70's. I am an old Northern Man, and one of the few "Old Boys" left. Don Hollingsworth Sr. is still around at G & L Marine, and he is a Raytheon transplant. Billy Pulse came from the end of the era Radar Electric shop. That's about it for that generation, that still practice the "Art" of Marine Electronics. Same with the "Regulators". (FCC) After the closing of RegionX in Kirkland, there just isn't anyone left that really understands the Marine Mobile Radio Service. Bob Dietch, Bob Zenes, Gary Solsby, Bill Johnson, and even Denny Anderson have all retired. Me getting old is a Bitch......all the good guys just die off.... worked at Raytheon in Seattle between Feb 1970 and Oct 1979. I sure remember Bill Pulse. Is he still with us? When I first applied to be an electronics technician, I interviewed with Bill. He rejected me. UG Allen at Raytheon hired me. I worked with the guys from G&L a lot. am now retired in Ironwood, Michigan. Yes, getting old is a bitch. I still remember the people and equipment like it was yesterday. it has been years, since I had thought of Old U.G. Allen..... but I remeber you, Ed. Can't picture you in my minds eye, but the name sure does resonate in the dusty memories. Yes, Billy Pulse is still around in Bellingham, WA and I talk to the Don's Sr & Jr at G & L Marine from time to time, especially when I get stumped on a Radar problem. Just had one of those last month. Had a Furuno 1941 start losing range over a month or so. Went from solid 36 Mile targets, down to barely 4 mile targets. Still had the OEM Magnitron and something like 6000 Operating Hours logged. So I figured, "tired Maggie" right? Replaced it, and no change. After looking at the Manual Receiver Tuning, and finding that I could run the Tuning Voltage from 5Vdc to 35Vdc with absolutly no change on the received targets, I got really suspicious of the MMIC Front-end. Pulled the T/R Pan and looked at the Tuning Voltage @ the inside of the feedthru Cap inside of the MMIC casting to make sure I just didn't have a broken wire somewhere. Since I didn't have a new MMIC, and also had no way to test the T/R Pan offline, I sent it down to Don Sr. and he did the replacement, and tested it on his testbed Radar Bench. Reinstalled, and have 36 mile targets again. That was the first time I have ever heard of a MMIC having that particular failure. (Tuning Line Voltage not actually tuning the LO in the MMIC) Live and Learn... Bruce in alaska UG Allen!!!! Holy Smokes, I don't think I've heard that name for 20 years! He helped me (via telephone) work my way through a Raytheon that I'd never seen before...... forget the model number, but you guys probably are familiar with the beast. 115vac motor generator wasn't it that turned a big fat open scanner with a tube transmitter and receiver inside the scanner? Big orange filtered CRT...... all the letters and numbers worn completely off the indicator controls, substituted by big black pencil marks where the skipper had the best luck. Easily picked seagulls out at 1/4 mile on flat water. Quarter size burned spot in center of CRT..... standard for those Raytheons according to UG.... Local fishermen told me that he was the smartest man they had ever met, and that he was black. I never met him face to face, but he taught me (telephone again) the fine points of tuning a 1600 and the hot new 2600. Those were the days!!!! Old Chief Lynn |
#26
posted to rec.boats.electronics
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Koden MD-3600 Radar
In article ,
"Lynn Coffelt" wrote: "Bruce in Alaska" wrote in message ... In article , Edward Weigel wrote: snipped for brevity it has been years, since I had thought of Old U.G. Allen..... but I remeber you, Ed. Can't picture you in my minds eye, but the name sure does resonate in the dusty memories. Yes, Billy Pulse is still around in Bellingham, WA and I talk to the Don's Sr & Jr at G & L Marine from time to time, especially when I get stumped on a Radar problem. Just had one of those last month. Had a Furuno 1941 start losing range over a month or so. Went from solid 36 Mile targets, down to barely 4 mile targets. Still had the OEM Magnitron and something like 6000 Operating Hours logged. So I figured, "tired Maggie" right? Replaced it, and no change. After looking at the Manual Receiver Tuning, and finding that I could run the Tuning Voltage from 5Vdc to 35Vdc with absolutly no change on the received targets, I got really suspicious of the MMIC Front-end. Pulled the T/R Pan and looked at the Tuning Voltage @ the inside of the feedthru Cap inside of the MMIC casting to make sure I just didn't have a broken wire somewhere. Since I didn't have a new MMIC, and also had no way to test the T/R Pan offline, I sent it down to Don Sr. and he did the replacement, and tested it on his testbed Radar Bench. Reinstalled, and have 36 mile targets again. That was the first time I have ever heard of a MMIC having that particular failure. (Tuning Line Voltage not actually tuning the LO in the MMIC) Live and Learn... Bruce in alaska UG Allen!!!! Holy Smokes, I don't think I've heard that name for 20 years! He helped me (via telephone) work my way through a Raytheon that I'd never seen before...... forget the model number, but you guys probably are familiar with the beast. 115vac motor generator wasn't it that turned a big fat open scanner with a tube transmitter and receiver inside the scanner? Big orange filtered CRT...... all the letters and numbers worn completely off the indicator controls, substituted by big black pencil marks where the skipper had the best luck. Easily picked seagulls out at 1/4 mile on flat water. Quarter size burned spot in center of CRT..... standard for those Raytheons according to UG.... Local fishermen told me that he was the smartest man they had ever met, and that he was black. I never met him face to face, but he taught me (telephone again) the fine points of tuning a 1600 and the hot new 2600. Those were the days!!!! Old Chief Lynn Yea, UG was a hell of a Radarman back in the day... Lynn, your thinking of the Raytheon 1700 Radar, that had a DC Motor/AC Generator that turned the antenna as well as provided the 115Vac that ran the electronics, from the DC voltage input. They came in 12, 24, 32, and 110Vdc versions. My first 12Vdc/115AC PowerConverter in my 1958 Dodge PowerWagon PanelTruck was one of those from a scrapped out 1700 that I got from UG. RadioMen loved those old Raytheon Radars, as they had a MTBF of about 100 Operating Hours. Crystals were a instant $50 fix, for their pocketbook, and 2J42's were forever getting cooked by to high of heater voltage. The thing I hated about 1700's was cleaning all those sliprings on the antenna unit that feed the display. The 1700 also had a headphone jack, on the receiver end of the antenna, so you could hear the Baseband while tuning the 2K25 Klystron LO. Bruce in alaska remembering those Goodtimes, of bygone days..... -- add a 2 before @ |
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