Index-coupling gel or index-coupling glue optimize the transmission of light between optical elements. Otherwise you will have reflections at the interface...
5064
J. Marshall Reber
groschen1936
Oct 1, 2005 1:49 pm
In a pinch I have known people to to use silicone spray lubricant. By spraying into a cup and allowing the solvent to evaporate sufficient gummy residue may...
5065
Jim
jim7839
Oct 1, 2005 2:26 pm
The talk of the 111 b without the tube got me started thinking (yet again) of the history of the PRI company. I found a comment on the PRI record site on the...
5066
Geo
K0FF
Oct 1, 2005 2:49 pm
Ludlum sells the gel in a big tube. Enough to last a lifetime. Do NOT use the gel on the ZnS end. It will migrate to the powder and mess it up. This advice...
5067
Chuck Abraham
ckarraz
Oct 1, 2005 10:06 pm
Paul Frame has been very helpful to me in the history dept. You probably know of him. You can email him from the ORAU site. A very helpful and nice person ...
5068
Bill Beamon
kd4fnc
Oct 2, 2005 12:48 am
I'll vouch for Ival at Radiation Sensors. His small outfit is about 10 mi N of Huntsville, where I am. My only connection is as a satisfied customer. I have...
5069
Chris Cavanaugh
night427
Oct 2, 2005 1:10 am
Ival knows his stuff! He has replacement crystals for he 117b too, and is familiar with it. Unfortunately his prices are out of my budget (but still not...
5070
Chris Cavanaugh
night427
Oct 2, 2005 1:13 am
"Thanks though for the lead. I might be better off buying a junker PRI 111B." Has anyone purchased an unreastored 111b or 111b with a good crystal? Chris...
5071
Chuck Abraham
ckarraz
Oct 2, 2005 3:17 am
after many many old scint counters from ebay, the only one that was clear as crystal was in a Fisher Scintilliscope. possibly due to a well made aluminum ...
5072
brianweber4@...
brianweber4
Oct 2, 2005 4:24 am
Ivan called by by phone and sold me a 'hobby grade' 1x1" NaI crystal for $50.00. For some reason, the initial email quote was very high, about $200. He told me...
5073
countmandan
Oct 2, 2005 6:22 am
I removed the analyzer circuit board and connected direct to the voltage divider network at the base of the tube. I inserted a thin mylar window in the end of...
5074
DH
revtkatt
Oct 2, 2005 3:37 pm
... Radon is implicated in lung cancer, I think, not leukemia. Given her age at her death, it is almost ... That's like saying that being poisoned is merely...
5075
Robert Atkinson
robert8rpi
Oct 2, 2005 4:21 pm
I'm sure this has come up before, but here goes anyway, The compound Ludlum's sell (and most others use) is Dow Corning DC4 silicon grease (formally Midland...
5076
prutchi
Oct 2, 2005 7:47 pm
Hi! Off topic, but we can hardly contain our enthusiasm! Our home radiotelescope saw "first light" today. My oldest daughter and I observed a solar pass at...
5077
Chuck Abraham
ckarraz
Oct 2, 2005 7:54 pm
I thought the refractive index of the compound was important to make that seamless transition from the xtal to the pmt ... Best Regards, Chuck Abraham...
5078
GEOelectronics
K0FF
Oct 2, 2005 8:46 pm
Cool! Geo SETI Honor Roll #1 ... From: prutchi To: GeigerCounterEnthusiasts@yahoogroups.com Sent: Sunday, October 02, 2005 2:46 PM Subject:...
5079
brianweber4@...
brianweber4
Oct 3, 2005 4:38 am
I have several PRI radium calibration discs, they are now about 50 years old. Will they still be reliably accurate (or at least close enough), considering...
5080
chernobyl_87
Oct 3, 2005 7:20 am
There is a lead isotope pig on ebay for sale http://cgi.ebay.com/RADIOACTIVE-ISOTOPE- CONTAINER_W0QQitemZ7550426426QQcategoryZ26228QQrdZ1QQcmdZViewItem I would...
5081
tychounder
Oct 3, 2005 10:07 am
... years old. ... considering their age? ... Well, I just did a Google on Radium Half Life, and came up with a figure of 1622 years, by one of the guys who...
5082
GEOelectronics
K0FF
Oct 3, 2005 1:53 pm
According to the Universal Decay Calculator, there will be 97.86% left after 50 years. A handy online tool: http://www.wise-uranium.org/rcc.html Geo ... From:...
5083
DH
revtkatt
Oct 3, 2005 3:12 pm
... I particularly like how this is set up in the front yard in your nice neighborhood :-)...
5084
DH
revtkatt
Oct 3, 2005 3:30 pm
... Does he have to figure in the decay products' activity if he's using the activity of the original Ra source?...
5085
GEOelectronics
K0FF
Oct 3, 2005 3:35 pm
not really, it will be in equilibrium and also down by about the same amount. Geo ... From: DH To: GeigerCounterEnthusiasts@yahoogroups.com Sent: Monday,...
5086
kwcclark
Oct 3, 2005 4:12 pm
I just got a deal on a scintillator, Harshaw NaI(Tl) 2" end well detector. The label says Integral Line, Type 8SF8. Serial JL4. This is a complete assembly,...
5087
GEOelectronics
K0FF
Oct 3, 2005 4:33 pm
You did good! Just use the schematic in FILES for a 14 pin base and it will work fine. I have never found a Harshaw or Bicron to leak, therefore no yellowing...
5088
prutchi
Oct 3, 2005 6:34 pm
My next door neighbor did come up to ask what I was up to THIS time. I told him with a very serious face that there was a CIA satellite there looking through...
5089
troglodite@...
clicker238
Oct 3, 2005 7:57 pm
In a message dated 10/3/05 1:36:28 PM Central Daylight Time, url@... writes: Once I get this week's scans, I'll leave the antenna in "birdbath"; ...
5090
Ronald Fleshman
ronfleshman
Oct 3, 2005 8:18 pm
I believe the telecommunications act of 1996 exempts dishes of 18 inches in diameter and less from any restrictions. check with a Radio Shack or other seller ...
5092
prutchi
Oct 3, 2005 10:06 pm
Hi Ron! DBS dishes are OK. Everyone around has one (we do too). However, I would like a 12 foot+ dish for the radiotelescope. On the matter of being able to...
5093
docico325@...
docusn1
Oct 3, 2005 11:02 pm
Hi every one I was wondering if anyone had a Manual for a Bicron Surveyor M with scaler option that I could get a copy of or down load from. Thanyou Mark....
