need a 100K-Megaohm resistor (100 Giga-Ohm)

[Alex [Temple Boatanchors]]

At 11:22 AM 8/10/2006, you wrote:
>>  Also a couple of days back on ebay I bought a 5-pack of NIB/NOS 
>> 5886 GE electrometer tubes for about $12, shipping included.
>
>     If you check those and they are fine you may have a fortune 
> there. There is a commonly used helium leak detector that are still 
> used with that tube in the mass spec. Helium detector. The rest of 
> the leak detector is fancy solid state stuff but that part still 
> uses a tube because of arc discharges that happen from time to time.

Bill, the 5886 tube does come up quite often on ebay, and that was 
one of the reasons I decided to go ahead with the project. Most of 
the time they are offered at similar prices too like the ones I 
bought, and sometimes a bit more (up to ~$15-30 per tube), but then 
again, like you say they are only worth something IF they are fine.

Since I'm getting a socket for them with the parts of the Radiation 
Tester, luckily I'll be able to test them individually.

-Alex

-----------------------------------------------------------
This list is a public service of the City of Tempe, Arizona
-----------------------------------------------------------

Subscription control - http://www.tempe.gov/lists/control.asp?list=BOATANCHORS
To post - BOATANCHORS at LISTSERV.TEMPE.GOV
Archives - http://listserv.tempe.gov/archives/BOATANCHORS.html