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#1
August 19th 03, 04:33 PM
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Bill Janssen wrote: I vote for the Bristol answer. I think I have a couple here
but it would probably take a "crime scene" investigation to find them. I have a couple of BC221 and the newer version with a CRT. Bill K7NOM That CRT comment was about as wrong as can be. The "CRT" was a magnifier glass to read the film strip dial. Should have looked at the unit before commenting. Bill K7NOM |
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#2
August 19th 03, 12:30 AM
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Mike W wrote:
On Mon, 18 Aug 2003 17:00:04 +0100, Dick wrote: I'm trying to get a hold of a tool that will undo grub screws securing the front panel knobs on my venerable BC221, can anyone suggest where I can get a hold of one, a modern equivalent and/or something that can be modified to do the job ?? Although all BC221s were provided with the tool (stored in a clip beside the spare valves) I've never seen one and can only guess that it must be something like a very small Phillips screwdriver head but with a parallel rather than tapered tip. It must also be less than 3/32" dia 'cos I've just tried to make one by hand out of 3/32" dia steel rod and that was too big, don't think my eyesight is up to hand filing the cruciform tip in any smaller dia rod, hence a request for help !! My BC221 is still furkling along after 63+ years (& only c/s - There, I've said it !!) out of calibration) but I think I should at least try & smarten up the case with a good clean and a bit of fresh paint. Who knows, it's probably got more chance of making the century than I have. Thanks Dick, I think they are "Allen Key" or "Hex Key" grub screws but I won't bet on it though. hth Mike W, G8NXD I vote for the Bristol answer. I think I have a couple here but it would probably take a "crime scene" investigation to find them. I have a couple of BC221 and the newer version with a CRT. Bill K7NOM |
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#3
August 18th 03, 05:22 PM
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On Mon, 18 Aug 2003 17:00:04 +0100, Dick
wrote: I'm trying to get a hold of a tool that will undo grub screws securing the front panel knobs on my venerable BC221, can anyone suggest where I can get a hold of one, a modern equivalent and/or something that can be modified to do the job ?? Although all BC221s were provided with the tool (stored in a clip beside the spare valves) I've never seen one and can only guess that it must be something like a very small Phillips screwdriver head but with a parallel rather than tapered tip. It must also be less than 3/32" dia 'cos I've just tried to make one by hand out of 3/32" dia steel rod and that was too big, don't think my eyesight is up to hand filing the cruciform tip in any smaller dia rod, hence a request for help !! My BC221 is still furkling along after 63+ years (& only c/s - There, I've said it !!) out of calibration) but I think I should at least try & smarten up the case with a good clean and a bit of fresh paint. Who knows, it's probably got more chance of making the century than I have. Thanks Dick, I think they are "Allen Key" or "Hex Key" grub screws but I won't bet on it though. hth Mike W, G8NXD |
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#4
August 18th 03, 11:04 PM
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#5
August 19th 03, 07:48 AM
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"Bibby" wrote in message news:z3c0b.183660$YN5.135802@sccrnsc01... Dick, as others have said, these probably need Bristol wrenches. I bought some a few months back from Good luck, Malcolm, W1/GW3NJY Some Bristol wrenches here http://cgi.ebay.com/ws/eBayISAPI.dll...ategory=46 73 |
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#6
August 19th 03, 07:48 AM
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"Bibby" wrote in message news:z3c0b.183660$YN5.135802@sccrnsc01... Dick, as others have said, these probably need Bristol wrenches. I bought some a few months back from Good luck, Malcolm, W1/GW3NJY Some Bristol wrenches here http://cgi.ebay.com/ws/eBayISAPI.dll...ategory=46 73 |
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#7
August 18th 03, 11:04 PM
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#8
August 18th 03, 11:06 PM
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Correction, that should have been WEINER not WIENER!
Malcolm "Dick" wrote in message ... I'm trying to get a hold of a tool that will undo grub screws securing the front panel knobs on my venerable BC221, can anyone suggest where I can get a hold of one, a modern equivalent and/or something that can be modified to do the job ?? Although all BC221s were provided with the tool (stored in a clip beside the spare valves) I've never seen one and can only guess that it must be something like a very small Phillips screwdriver head but with a parallel rather than tapered tip. It must also be less than 3/32" dia 'cos I've just tried to make one by hand out of 3/32" dia steel rod and that was too big, don't think my eyesight is up to hand filing the cruciform tip in any smaller dia rod, hence a request for help !! My BC221 is still furkling along after 63+ years (& only c/s - There, I've said it !!) out of calibration) but I think I should at least try & smarten up the case with a good clean and a bit of fresh paint. Who knows, it's probably got more chance of making the century than I have. Thanks -- Dick GM0MNL |
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#9
August 18th 03, 11:06 PM
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Correction, that should have been WEINER not WIENER!
Malcolm "Dick" wrote in message ... I'm trying to get a hold of a tool that will undo grub screws securing the front panel knobs on my venerable BC221, can anyone suggest where I can get a hold of one, a modern equivalent and/or something that can be modified to do the job ?? Although all BC221s were provided with the tool (stored in a clip beside the spare valves) I've never seen one and can only guess that it must be something like a very small Phillips screwdriver head but with a parallel rather than tapered tip. It must also be less than 3/32" dia 'cos I've just tried to make one by hand out of 3/32" dia steel rod and that was too big, don't think my eyesight is up to hand filing the cruciform tip in any smaller dia rod, hence a request for help !! My BC221 is still furkling along after 63+ years (& only c/s - There, I've said it !!) out of calibration) but I think I should at least try & smarten up the case with a good clean and a bit of fresh paint. Who knows, it's probably got more chance of making the century than I have. Thanks -- Dick GM0MNL |
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#10
August 19th 03, 07:54 PM
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"Dick" wrote in message ... I'm trying to get a hold of a tool that will undo grub screws securing the front panel knobs on my venerable BC221, can anyone suggest where I can get a hold of one, a modern equivalent and/or something that can be modified to do the job ?? Although all BC221s were provided with the tool (stored in a clip beside the spare valves) I've never seen one and can only guess that it must be something like a very small Phillips screwdriver head but with a parallel rather than tapered tip. It must also be less than 3/32" dia 'cos I've just tried to make one by hand out of 3/32" dia steel rod and that was too big, don't think my eyesight is up to hand filing the cruciform tip in any smaller dia rod, hence a request for help !! My BC221 is still furkling along after 63+ years (& only c/s - There, I've said it !!) out of calibration) but I think I should at least try & smarten up the case with a good clean and a bit of fresh paint. Who knows, it's probably got more chance of making the century than I have. Thanks -- Dick GM0MNL You need Bristol wrenches or Bristol keys or whatever Bristol calls them. They come in 4 or 6 point form. The 6 point ones look very much like Torx head screws. You need the 4 point type. I got mine from McMaster Carr: mcmaster.com I don't know if Bristol wrenches are easily available in the UK. McMaster's website seems to be down right now, but I have to figure they do international orders. Frank Dresser |
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