Re: Transporting a 500-Series Scope without Breaking the CRT
It should be fine as long as you don't pretend you work for UPS and toss it onto your porch or over a fence! -Dave -------------------- Short of removing the CRT, and transporting it separately, I'm
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Dave Seiter
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#182143
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Re: OT! OT! --- E-bay fee change -- OT! OT! Cross posted with HP group.
The only swap meet I've ever been to was the Foothill/DeAnza/Fry's monthly meet.? It used to be huge, but got so small that I've only been a few times in the past 5 years.? For a long time it was
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Dave Seiter
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#182142
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Re: Chaining power supplies together.
Be worth obtaining an adjustable power supply if you plan on doing many board repairs. Why risk damaging boards? Bill
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Bill
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#182141
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Re: Transporting a 500-Series Scope without Breaking the CRT
The rotator ring mechanism in the 575, and perhaps other scopes of that era was made of nylon. The nylon splits, and the back end of the tube can flop around a bit. Not alot mind you, it's still in a
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David Holland
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#182140
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Re: Transporting a 500-Series Scope without Breaking the CRT
I'd be more worried abut my dashboard if the item weren't strapped in the seat. As for hauling it in your seat, if you have a nice vehicle grab a couple of fluffy bath towels and throw them on the
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Greg Muir
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#182139
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Re: Transporting a 500-Series Scope without Breaking the CRT
Paul, I used to haul large CRTs (21" computer displays) this way, which are admittedly less finicky than an old tek scope, at least they never seemed to care about orientation, and I would seatbelt
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Jeff Dutky
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#182138
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Re: OT! OT! --- E-bay fee change -- OT! OT! Cross posted with HP group.
I am not sure if you will agree, but I think eBay had a major impact on hamfests. For me, they were always a great place to buy and sell electronics. I did sell a couple of Tek scopes at the
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stevenhorii
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#182137
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Re: 465M
Bill and Dave, Thanks for the replies. I have an HV probe (Kaise SK-9000: http://www.electronicrepairguide.com/high-voltage-meter.html) and that is how I checked the 10kV at the end of the tripler. It
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Ananda
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#182136
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Re: Transporting a 500-Series Scope without Breaking the CRT
As long as it's strapped in so it doesn't shift on a panic stop you should be fine. Paul -- Paul Amaranth, GCIH | Manchester MI, USA Aurora Group of Michigan, LLC | Security, Systems & Software
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Paul Amaranth
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#182135
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Re: 465M
I have one of the Pomona HV? metered probe that I will lend if someone needs to make a measurement. 73, Bill , WA2DVUCape May
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Bill Riches
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#182134
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Re: Transporting a 500-Series Scope without Breaking the CRT
Cool. Thanks Ed. So I'll strap it right-side-up in the front seat, next to me. That should provide enough cushioning for the drive home. I think there's a scope-mobile cart, as well, but that will fit
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Jeff Dutky
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#182133
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Re: Transporting a 500-Series Scope without Breaking the CRT
If carrying it yourself, it should be just fine if not banged around or dropped. Keep it upright in its normal operating position - never haul with the face down. Ed
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Ed Breya
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#182132
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Transporting a 500-Series Scope without Breaking the CRT
Any advice on what to check before transporting a 500-series scope? I know that there's some kind of clamp or brace for the CRT on these old scopes that can deteriorate with time. I'm planning to
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Jeff Dutky
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#182131
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Re: Chaining power supplies together.
Say you have two or more supplies stacked to get the sum of output voltages. Fine and good. Now short the total output and think about what will happen if you have no reverse clamp protection on the
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Ed Breya
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#182130
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Re: Chaining power supplies together.
So by protection diode, you're not talking about over-voltage, you're talking about accidentally driving another source. So a forward biased diode that would prevent current into the power supply.
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Dave Peterson
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#182129
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Pile of HP marked ICS for Free
I have several stock boxes full of these new bagged parts from HP. needless to say, the packaging is most of the bulk. I can remove that to save on shipping. are these any use to anyone for projects
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walter shawlee <walter2@...>
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#182128
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Re: Chaining power supplies together.
Here's a specific example of what I'm thinking of doing with such a scenario: I'd like to be able to run 465 boards on the bench to test them before reassembling on the chassis. I have a variety of
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Dave Peterson
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#182127
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Re: Chaining power supplies together.
Definitely.? Most power supplies take a very dim (as in permanently off) view of reverse voltage applied to their terminals.? Most also don't like to be tied to another power supply in parallel
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Harvey White
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#182126
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Re: Chaining power supplies together.
Could you elaborate Ed? Seems such diodes might need to be robust. Any particular type that's appropriate? I take it these need to have a reverse breakdown?voltage above the supply? But are there
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Dave Peterson
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#182125
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Re: Chaining power supplies together.
Be sure to add an external reverse protection diode across each output, in case there isn't one built in. Ed
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Ed Breya
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#182124
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