... Bob Pease from National Semi talks about Teflon a lot. It causes problems by storing charge internally. It's actually TOO good. Glass and Air are your...
3396
David VanHorn
dvanhorn2001
Mar 1, 2004 2:54 pm
... You can make large resistors with india ink on glass. Controlling the value is literally an art form, but with a few trials, I think you could get there....
3397
DL4YHF@...
dl4yhf
Mar 1, 2004 6:05 pm
Hello group, Thanks for the feedback regarding neon bulbs as GOhm-resistor. Especially the link to ion chambers looks very interesting, though I don't think...
3398
pseudospark
Mar 1, 2004 6:42 pm
Great investigative work. Yes, there could be some sputtered electrode material on the inside. It'd be interesting to compare a well used bulb with one that is...
3399
INSPIRE Team I-1
vlfkorgan1
Mar 1, 2004 7:03 pm
Greetings, From experiments I did several years ago, I found that the little 1/4" neon bulbs had the highest resistance and the longer 1" or greater in length...
3400
Eric Vogel
evogel99
Mar 1, 2004 7:52 pm
That sounds really interesting - cheap gigaohm resistors to specific values. Let us know how it works! Eric I am tempted to "adjust" the resistance by frying ...
3401
David VanHorn
dvanhorn2001
Mar 1, 2004 7:53 pm
... Sounds like a winner, metal film resistors, the hard way :) Also, seems like something you could automate with a microcontroller. Measure resistance, blast...
3402
Mark
marky26_uk
Mar 1, 2004 10:40 pm
Hi all Vlf'ers, Just found this document about a whistler detector. http://www.cosis.net/abstracts/EGU04/01390/EGU04-A-01390-1.pdf How hard would it be to make...
3403
ian@...
iflya
Mar 2, 2004 12:47 am
Tom There are a few of us here in the UK that have made VLF receivers ... i built mine with almost no knowledge about making electroics and it works!!! ...
3404
INSPIRE Team I-1
vlfkorgan1
Mar 2, 2004 4:32 am
There are S2 strength whistlers occurring occasionally (about one every five minutes) here in Colorado. The neat thing about these whistlers is they are...
3405
Robert Bennett
rbennett@...
Mar 2, 2004 5:35 am
I am looking for information on the storage of magnetic cassette tapes. I record natural radio monitoring sessions in stereo on cassettes. I use 60 Minute...
3406
Mark Karney
mkarney19
Mar 2, 2004 6:48 am
... Hi Robert, Here's what I've found after 30 years in the studio business. Cassettes can be quite stable over the long term. I have cassettes that are almost...
3407
Johan Bodin
junkodyn
Mar 2, 2004 7:54 am
Hello Wolf and the group, somewhat off-topic but hopefully interesting: Your neon bulb experiment reminds me of a strange phenomenon I saw in xenon flash...
3408
mdrdg@...
ka0mr
Mar 2, 2004 2:41 pm
Why on earth haven't you digitized them and put them on CD??? ... From: Mark Karney Sent: 3/2/2004 12:47:36 AM To: VLF_Group@yahoogroups.com Subject: Re:...
3409
Rich Oliver
Rich.Oliver@...
Mar 2, 2004 3:14 pm
This reminds me of a curious thing I saw when I was a student at Purdue c. 1970. A couple of the electronics tech guys had built a relaxation oscillator with...
3410
john nelson
jnelson123_us
Mar 2, 2004 4:41 pm
I used to spend a lot of time around electronic equipment that had neon indicator lights. It was very common to have devices that would not come on or would ...
3411
thierry alves
f6keo
Mar 2, 2004 4:54 pm
... Maybe, because he can't !!! I had the same problem. I used K7 during 2 years and still use that in 80 % of my records, but after I put it on my computer. ...
3412
DL4YHF@...
dl4yhf
Mar 3, 2004 6:25 pm
Hello group, I tried to adjust the resistance of a small neon bulb (new) by driving it with excessive current for a few hours - without success. It got quite...
3413
Percy Jones
vze3t6ka@...
Mar 3, 2004 7:13 pm
I was just looking in an old book by JJ Thompson and his son GP called "Conduction of Electricity through Gases" Vol 1. Apparantly Elster and Geitel did a lot...
3414
David VanHorn
dvanhorn2001
Mar 3, 2004 7:34 pm
... 1/4 inch tape is still a viable media, some 50-60 years after it's introduction. CD-ROM has a ways to go....
3415
J Oliver
trufflehunter50
Mar 4, 2004 2:48 pm
Hi! I've been lurking on this Newsgroup quite a while (and known via e-mail to one or two correspondents). I don't make my own recordings - yet, but I have an...
3416
Gallagher, Dennis
galladl
Mar 4, 2004 3:44 pm
Jenny, Whistlers are formed by what is called frequency dispersion. Lightening contains a broad range of frequency components. In a plasma the higher ...
3417
trufflehunter50
Mar 4, 2004 4:15 pm
Thanks, Dennis. I did not realise there was such a wide variation of refractive index (or equivalent) for the different wavelengths/frequencies in a plasma....
3418
Gallagher, Dennis
galladl
Mar 4, 2004 4:46 pm
Jenny, Check out the Stanford STAR labs web site for VLF wave work: http://www-star.stanford.edu/~vlf/Welcome.html Under general information toward the bottom...
3419
Charles R. Patton
charles.r.patton@...
Mar 4, 2004 7:58 pm
A while back I was playing with xeon trigger tubes. These were small units normally used as transient voltage protectors in electronic equipment and just...
3420
thierry alves
f6keo
Mar 5, 2004 1:07 pm
Hi Group, some months ago I had the chance to exchange some e-mails with Owen Storey, he writes really well French and as I understood he done some research in...
3421
Percy Jones
vze3t6ka@...
Mar 5, 2004 8:50 pm
Does anyone know if MR (Magnetospherically reflected) whistlers can ever be heard on the ground? They are commonly heard by satellites but I wondered if...
3422
Gallagher, Dennis
galladl
Mar 5, 2004 9:13 pm
Percy, All whistlers have traveled out into space along magnetic field lines. Only the one hop whistlers have not already been reflected by an ionosphere, but...
3423
INSPIRE Team I-1
vlfkorgan1
Mar 6, 2004 12:54 am
Greetings, Percy has been trying to help me with a little whistler mystery I have here in Colorado. I often record high frequency (high pitched) whistlers...
3424
Mark
marky26_uk
Mar 6, 2004 11:56 am
Hi all, Can anybody tell me if there is a lower noise FET than the BF244 ? If there is will you still get the same gain as the BF244 or do you sacrifice gain...
