- Bugs in the machine. - 1 Update
- Diffferent techniques in troubleshooting - 2 Updates
- Dumont 1062 scope - 5 Updates
| N_Cook <diverse@tcp.co.uk>: Jan 06 04:32PM Would a bit of napthalene mothball keep spiders and other small creepy crawlers out of the warmth of an always-on, so warm, bit of kit, or any better ideas to keep bugs out of there. Bose AWRC3G CD radio clock, started non playing of the odd CD then all CDs failed to play. Cleaning the lens, no difference, "Disc" in display, the same as with no disc in there. The whole unit was so full of fine spider web/cocoon silk? that you could not see the components of the PA/PS area. Odd bits of insect stuff around the optical unit. Removed the laser and lens unit from the sledgeway and air dusted under the lens area. Blew out the PA/PS area with 1kW blower. Now playing all CDs thrown at it, cured? I've twice previously come across bug cocoon/web actually inside the space under the lens of CD units ,in the laser firing line, as the fault cause. |
| "pfjw@aol.com" <pfjw@aol.com>: Jan 05 10:00AM -0800 On Sunday, January 3, 2016 at 8:24:33 PM UTC-5, Ron D. wrote: > The st120 is an interesting beast. I did repair one in the 80's AFTER someone made swiss cheese out of it. Yeah - "interesting" is a mild descriptive of a beast that can range from a purring kitten to a rabid wolverine in its behavior. I have three examples in my immediate possession - not one from the same lot or with matching boards... Peter Wieck Melrose Park, PA |
| "Mark Zacharias" <mark_zacharias@sbcglobal.net>: Jan 06 03:56AM -0600 <pfjw@aol.com> wrote in message news:b32070d3-a677-4290-a36c-97c09439d778@googlegroups.com... > matching boards... > Peter Wieck > Melrose Park, PA ST-120's. They're like Harley Davidson motorcycles. If you love them, if you can fix them, if you don't mind the smell of carburetor cleaner and the oil stains on your living room floor, go for it! Mark Z. |
| fordfanatic460@hotmail.com: Jan 05 07:29PM -0800 I recently picked up a Dumont scope type 2559a serial # 1252 Looks really cool and the thing weighs like 100 lbs. Anyway I was playing with it over the holidays and it seems to be reading vertically on the screen instead of horizontally like a normal scope. Anyone ever heard of or seen that before? Any ideas? |
| Kaz Kylheku <kaz@kylheku.com>: Jan 06 03:49AM > I recently picked up a Dumont scope type 2559a serial # 1252 > Looks really cool and the thing weighs like 100 lbs. That's good; so if you strap your ankle to it with a flexible linkage, you get protection in those situations where an electric arc would otherwise throw you across the room. |
| "Tom Miller" <tmiller11147@verizon.net>: Jan 05 11:33PM -0500 <fordfanatic460@hotmail.com> wrote in message news:2de819e8-abce-434b-ad1e-9c97b1ddb88d@googlegroups.com... > Anyway I was playing with it over the holidays and it seems to be reading > vertically on the screen instead of horizontally like a normal scope. > Anyone ever heard of or seen that before? Any ideas? There's a manual on ebay for pretty cheap. http://www.ebay.com/itm/Cathode-Ray-Oscilloscope-Du-Mont-Type-2559A-748-1047-Instruction-Book-1957-/161667404698?hash=item25a420d39a:g:HcoAAOSwBLlVJzTd This is a late 1950's scope so most that ever used one have forgotten about them. |
| Jon Elson <elson@pico-systems.com>: Jan 05 10:39PM -0600 > Anyway I was playing with it over the holidays and it seems to be reading > vertically on the screen instead of horizontally like a normal scope. > Anyone ever heard of or seen that before? Any ideas? Possibly somebody swapped the wires on the deflection plates. Usually there are 4 wires poking out through holes in the CRT magnetic shield, with wires to the deflection amps. You could try swapping the pairs of wires. Jon |
| Michael Black <et472@ncf.ca>: Jan 06 02:31AM -0500 |
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