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43102

Headphone repair One of mine went bad and it was not possible to cleanly remove the coil and rebuild it, so I went to Radio Shack and bought a small piezo disk and fitted it.

David Nix
3:21 PM
#43102
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43101

Passive piezo speaker Doesn't make much noise, but no passive speaker will. My instructable. GPL so you can copy it and pass it around. The other assembly is with an LED instead of

David Nix
Feb 28
#43101
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43100

Re: Vacuum Tube Check Source Kits Shipped to Members! [1 Attachment] Dear David, Just remember one thing: "shake it, but DON'T break it!" Thanks. ~ Cliff ************* On Fri, Feb 27, 2015 at 7:18 PM, David Nix

Defender
Feb 28
#43100
 

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43099

Allnilo - Allyn Remembered IIRC, from Doug's report last year (Apr.?) that our friend Allyn passed away a year ago today - 02-27-14. He was a very mindful, and caring individual, who had

n5tsx
Feb 27
#43099
 

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43098

Re: Vacuum Tube Check Source Kits Shipped to Members! That big tube is the only thing in my collection that will light up a Vic 05-571 MiniMonitor [other than direct contact with a smoke detector pit.] It makes me

David Nix
Feb 27
#43098
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43097

Re: 6a's HV diode failures ? I was also thinking about noise...not TOO tough to filter, and a shielded housing is not too tough to make, in case radiated noise is an issue. On Fri, Feb 27,

M K
Feb 27
#43097
 

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43096

Re: 6a's HV diode failures ? ... Seems to depend both on the tube, and on the specific scintillation material used. Some materials produce a pulse of photons (and hence electrons from the

Dave Platt
Feb 27
#43096
 

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43095

Re: 6a's HV diode failures ? Those bricks put out lethal current, no sag. They require respect. I've used one on 2 different scints and the battery current requirements are modest. I

David Nix
Feb 27
#43095
 

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43094

Re: 6a's HV diode failures ? I haven't bought a nixie tube HV supply myself, but I've built very similar invertors and they can provide about 1000V into 50Mohms or higher So as long as the

peter
Feb 27
#43094
 

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43093

Re: 6a's HV diode failures ? That should work fine for a GM tube, but might require a bit of further rework to work for a Scintillator. On Fri, Feb 27, 2015 at 12:21 PM, peter

M K
Feb 27
#43093
 

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43092

Re: 6a's HV diode failures ? Other cheapo alternative. There are flyback power supplies for nixie and magic eye tube projects. They output 100~ +200V under a heavy load( driving nixie

peter
Feb 27
#43092
 

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43091

Re: 6a's HV diode failures ? Hi David, Regarding that EMCO brick, can you tell me how many milliamps on the (4.5V ?) supply are required for 900V using a G/M tube? Is the high voltage

m1i8k3e6
Feb 27
#43091
 

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43090

Re: Hot package found... a good thing! -- /// -- The kits are descri Hi Cliff, I did receive the kit #2 as you described it. I don't have a spectrometry set up so was guessing/reading the packaging for what was in each tube.

Clare Owens
Feb 27
#43090
 

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43089

Re: 6a's HV diode failures ? You can buy tiny EMCO bricks that take regulated low voltage dc and make well above 1KV. They will easily fit on a CDV-700

David Nix
Feb 27
#43089
 

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43088

Re: Hot package found... a good thing! -- /// -- The kits are desc Alphas only, but the alphas have enough energy to generate secondary gammas.The 4.871MeV value is fortunately just below what would generate pair production

David Nix
Feb 27
#43088
 
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