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Post by Night Ranger on Jul 5, 2014 17:04:54 GMT -5
I made it in to Sandbagger's live feed on Saturday 7/5/2014 via skip from South Carolina, but nobody was home. I was using a Robyn T-123b tube type radio and an Astatic D-104 desk mic. youtu.be/4Fpolo_zWIMNight Ranger  |
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Sandbagger
Administrator/The Boss 
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Post by Sandbagger on Jul 7, 2014 6:19:59 GMT -5
I made it in to Sandbagger's live feed on Saturday 7/5/2014 via skip from South Carolina, but nobody was home. I was using a Robyn T-123b tube type radio and an Astatic D-104 desk mic. youtu.be/4Fpolo_zWIMNight Ranger I was actually just home from vacation, but not within arm's reach of the microphone..... |
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Post by Night Ranger on Jul 7, 2014 8:06:22 GMT -5
I was actually just home from vacation, but not within arm's reach of the microphone..... Was your beam aimed out over the ocean to limit the skip? I never managed more than an S8+. The skip was never super strong, but I did have conditions on and off to PA even in to Sunday morning. I talked to "Monkey Man" in your area on Sunday morning. I also talked to "457" or "357" Saturday. I may have his number wrong, but I think he said he was in Valley Forge, PA. I was looking at a picture of the Lafayette Comstat 25a top inside electronics on Ebay, and it looks identical to the Robyn T-123b. Night Ranger |
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Sandbagger
Administrator/The Boss
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Post by Sandbagger on Jul 7, 2014 9:45:22 GMT -5
I was actually just home from vacation, but not within arm's reach of the microphone..... Was your beam aimed out over the ocean to limit the skip? I never managed more than an S8+. The skip was never super strong, but I did have conditions on and off to PA even in to Sunday morning. I talked to "Monkey Man" in your area on Sunday morning. I also talked to "457" or "357" Saturday. I may have his number wrong, but I think he said he was in Valley Forge, PA. I was looking at a picture of the Lafayette Comstat 25a top inside electronics on Ebay, and it looks identical to the Robyn T-123b. Night Ranger My beam is normally pointed ESE, unless I need to null out a particular direction of interference. ESE covers pretty much 98% of the locals I normally talk too. It also has the additional benefit of lowering the skip levels from the west and SW areas. When the omni guys are getting hammered with S9 heterodyne, my skip levels are usually less than S7. At that point I can run the squelch and still hear most of the locals. The Comstat 25a is pretty much the same chassis as the Robyn. They are both Panasonic-made chassis, along with tube models offered by several other manufacturers such as Gemtronics, Teaberry, Cardin, Shakespeare and others. Some user features may change on different models, but the basic schematic is virtually identical. |
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Post by Night Ranger on Jul 7, 2014 10:23:26 GMT -5
Was your beam aimed out over the ocean to limit the skip? I never managed more than an S8+. The skip was never super strong, but I did have conditions on and off to PA even in to Sunday morning. I talked to "Monkey Man" in your area on Sunday morning. I also talked to "457" or "357" Saturday. I may have his number wrong, but I think he said he was in Valley Forge, PA. I was looking at a picture of the Lafayette Comstat 25a top inside electronics on Ebay, and it looks identical to the Robyn T-123b. Night Ranger My beam is normally pointed ESE, unless I need to null out a particular direction of interference. ESE covers pretty much 98% of the locals I normally talk too. It also has the additional benefit of lowering the skip levels from the west and SW areas. When the omni guys are getting hammered with S9 heterodyne, my skip levels are usually less than S7. At that point I can run the squelch and still hear most of the locals. The Comstat 25a is pretty much the same chassis as the Robyn. They are both Panasonic-made chassis, along with tube models offered by several other manufacturers such as Gemtronics, Teaberry, Cardin, Shakespeare and others. Some user features may change on different models, but the basic schematic is virtually identical. Well then that makes my previous statement of calling my Robyn T-123a my "Sandbagger radio" even more appropriate since the Comstat 25/25a was one of your first base radios. I have a self oscillation I have to track down in mine. When I unkey there is occasionally a "braaappp" sound in the receive audio and the S meter jumps over. It occasionally does it when changing channels. I purchased the Sams CB-20 Photofact off Ebay since it covers the Comstat 25a. There is not a Sams Photofact for the Robyn T-123b. Night Ranger |
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Sandbagger
Administrator/The Boss
Posts: 6,247
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Post by Sandbagger on Jul 7, 2014 15:44:23 GMT -5
My beam is normally pointed ESE, unless I need to null out a particular direction of interference. ESE covers pretty much 98% of the locals I normally talk too. It also has the additional benefit of lowering the skip levels from the west and SW areas. When the omni guys are getting hammered with S9 heterodyne, my skip levels are usually less than S7. At that point I can run the squelch and still hear most of the locals. The Comstat 25a is pretty much the same chassis as the Robyn. They are both Panasonic-made chassis, along with tube models offered by several other manufacturers such as Gemtronics, Teaberry, Cardin, Shakespeare and others. Some user features may change on different models, but the basic schematic is virtually identical. Well then that makes my previous statement of calling my Robyn T-123a my "Sandbagger radio" even more appropriate since the Comstat 25/25a was one of your first base radios. I have a self oscillation I have to track down in mine. When I unkey there is occasionally a "braaappp" sound in the receive audio and the S meter jumps over. It occasionally does it when changing channels. I purchased the Sams CB-20 Photofact off Ebay since it covers the Comstat 25a. There is not a Sams Photofact for the Robyn T-123b. Night Ranger My Comstat 25 had a self oscillation problem some time back, which was caused by the absence of the -82V bias supply, which was the result of one of the .1uF caps opening up (usually they go POP!). It also affects the squelch circuit when that voltage is missing. CB Tricks has the 123B schematic www.cbtricks.com/radios/robyn/t_123b/index.htm |
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Post by BBB on Jul 7, 2014 15:56:28 GMT -5
I think I see D & A Hammer-tone Gray next to that rig  |
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Post by Night Ranger on Jul 7, 2014 16:50:29 GMT -5
I think I see D & A Hammer-tone Gray next to that rig Yep. That is a D&A Maverick 250. You can hear it on the videogate link at the top of this thread along with the Robyn. : ) -Night Ranger |
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Post by Night Ranger on Jul 7, 2014 16:52:00 GMT -5
Well then that makes my previous statement of calling my Robyn T-123a my "Sandbagger radio" even more appropriate since the Comstat 25/25a was one of your first base radios. I have a self oscillation I have to track down in mine. When I unkey there is occasionally a "braaappp" sound in the receive audio and the S meter jumps over. It occasionally does it when changing channels. I purchased the Sams CB-20 Photofact off Ebay since it covers the Comstat 25a. There is not a Sams Photofact for the Robyn T-123b. Night Ranger My Comstat 25 had a self oscillation problem some time back, which was caused by the absence of the -82V bias supply, which was the result of one of the .1uF caps opening up (usually they go POP!). It also affects the squelch circuit when that voltage is missing. CB Tricks has the 123B schematic www.cbtricks.com/radios/robyn/t_123b/index.htmI already have the schematic, but I was looking for the voltage chart. Now I see cbtricks.com has the owners manual too, and it includes the voltage chart. Oh well. Night Ranger |
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