开云体育

Dennis the 26 cm Spectral tubes are the most popular, used in physics labs These use 5 kV open ckt current limited transformers and run at 5 - 20 mA. The optical spectrum is dependent on gas mix, and

The mesh is an electrostatic lens that magnifies the limited vertical and horizontal deflection to fill the viewing screen area. This is done to allow a lower deflection plate voltage on a fairly

Hi all, and Happy New Year 2021, Is a 564B a good grab, is it desirable at all? It’s not considered a 500 series, right? 56x family I suppose... Thanks ?

Hello perhaps you are confusing Helipot a multiturn precison 3,5,10,15 turn potentiometer with internal 1 turn pcb mounted trimpots or single turn controls? If you can précis your questions with

I'm sorry I arrive pretty late in the conversation. There are online tools to identify fonts, with easy yes/no questions. I used one once to find which font was used on Philips instruments (for a

Dear Dennis: We worked on arc and gas lamp ballasts since 1970s. Then designed and manufactured 12 kV HV modules, in 1980s..1990s. The encapsulant is a very high solids epoxy, specially cured. We used

HI Please,Larry,add me to the list.I am located at Spain. Regards.

I would also be interested in a set of the boards, please add my name to the list. I am in Dublin, Ireland so I am aware that shipping will be somewhat more than the nominal amount suggested. I am

Thank you to everybody! I have enough information to attempt a transplant. I'll post here the outcome Giovanni

Hi Dennis, I believe it's not worth the effort, I'd personally build a new one using instructions from Sam's Laser FAQ: https://www.repairfaq.org/sam/laserhps.htm#hpstoc You'll find wealth of

Supposedly a 50/50 mix of formic and acetic acids will do the trick but I've never tried it. DaveB, NZ

My approach to this sort of problem (I’ve done it twice in the past thirty or so years) has been to use an Xacto knife to cut the potting compound away. I never did find a solvent that seemed to

Just a thought: I wonder if there are TM500 modules which are particularly picky on correct functioning of the mainframe. Such a module would - use all or most of the interface - show malfunction

I guess the point I was getting at but missed, was that it was labeled as containing acetone, but nothing else.? I try to stay away from beauty products (they wouldn't help me- hahaha!), but when it

Also xylene. Be careful of MEK, it will dissolve rubber gloves. -- Richard Knoppow dickburk@... WB6KBL

Dennis, A chemist friend once told me to try Dichloromethane. I have successfully unpotted two assemblies using this. First, it is nasty stuff, I put the part and the Dichloromethane in a glass jar

Yup. Some nail polish removers use acetone. Some removers use ethyl acetate or MEK or both. Remember MEK is used in the "glue" that plumbers use to solvent weld together plastic pipe.... in other

Hi Dennis: I couldn't remember... but finally did. There is the defacto go to FAQ... for "gas laser tube nuts" called "Sam's Laser FAQ" ... there is good bit of information about He-Ne laser power

I've found that nail polish remover can have weird stuff in it (besides the obvious dyes and fragrances) that pure acetone doesn't.? Last summer I poured half a bottle into the plastic tub of a

To wrap up my PS cap replacement: I replaced all 5 power supply filter caps. See thread above for details on replacements. I spent a couple of afternoons carefully pulling old supply caps. With all