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This is the place where readers can post their thoughts and comments about the site. The message form can also be useed to ask questions. This guestbook was opened on the 1st of March 2004.
Lisa (Germany)
Hi, Great site. All the sort of things I would like to do if I had the time!
I wonder whether you have tried making Aluminised Zinc Oxide (AZO) conductive
glass? I guess it would be more difficult than tin oxide conductive glass. Keep
up the great work! Lisa.
Malcolm Burrell (UK)
28th May 2010
Dear Robert, I really enjoyed your website. It describes and illustrates your experiments
quite beautifully. I encountered it accidentally while looking at methods of joining
glass. My own interest relates vintage (405-Lines) TV, of course. Your Video Monitor
using an oscilloscope tube is very interesting in that it reminds me of the receivers
built by enthusiasts using ex-Government components. I might one day even try it myself.
I do recollect fitting a 12" radar tube to a TV with quite spectacular results (orange &
black picture with a long persistence). And in one workshop I did modulate the tube
cathode of our little Telequipment oscilloscope to produce a picture which intrigued
my colleague at the time. Your Virtual Museum is also interesting. I once also mistook
a Barretter for a lamp. Some GEC TV receivers in the early 1950s used the device to
assist in stabilising the series heater chain although most engineers simply replaced
them with high wattage wire-wound resistors. Your hologram experiments are interesting.
I'm reminded of the 'father' of Holography, Prof. Dennis Gabor. He, in fact, also
proposed a 'Flat CRT for Colour TV' during the mid-1950s. I spent many years as a TV
engineer but, like most, tended to take the replacement parts market for granted. Of
course, when dealing with a set 50 years beyond its 'sell by' date, it isn't possible
to pop along the road to buy a new line output transformer so devising methods of
reconstruction is necessary. I've collected several vintage TVs which I'm slowly
renovating. One of the major problems is the fact that some of the cathode ray tubes
have faults such as low emission or partially short-circuit heaters. 'Rejuvenation'
techniques can sometimes temporarily restore operation but the only permanent cure
is to rebuild the device. Of course, I realise the hazards of implosion but have been
thinking seriously about the possibility of trying to replace defective heater/cathode
assemblies in some tubes. Again, the numerous back street tube rebuilders vanished once
the TV rental market collapsed so the expertise seems to have been lost. I think just
one or two remain - in the USA and France! This suggests that rebuilding a given
monochrome tube would cost £300 or more. Of course a good vacuum pump is essential but
first I've been considering the problems of safely opening tubes without damaging the
fluoreseen material and concluded that the 'hot wire' method is probably the best. The
second problem I'm considering is that of dismantling the electron gun, obtaining the
correct 29mm, 35mm,or 38mm glass tubing then joining it to the remnants of the neck.
The third is to There are other factors such as obtaining Barium to coat cathodes or
the construction of new heater (filaments). Fitting new components would demand spot
welding with some precision while evacuation should be accomplished with the device
placed in an oven - all areas where I have no expertise! But I'm still thinking! I'd
be pleased to hear any comments you might have...? Best wishes and good luck, Malcolm
Garry Anderson (USA)
4 May 2010
I am the head engineer for CIT and have access to dumet for the last 30 years. For
some small quantities of dumet .015 to .040 I may be able to help someone on special
projects.
Geert (Netherlands)
30 April 2010
Great site! Amazing experiments! I just bumped into it searching for some Dumet info.
I have worked for Philips Lighting for 32 year, doing all the stuff you are doing at
home (great job btw). Now I'm self employed as hot glass handling consultant (glassist.com).
I haven't read all of your site yet, but certainly will once I am back home (currently
on a job in China for a couple of weeks). Best regards, Geert
John Rultedge (USA)
18 August 2009
This site was the only reliable source I found on the net that could answer some
questions I have for a glass project I'm involved with at work. Definitely will
come back to this site again for updates.
Mark Lawton (UK)
14 May 2009
Hi there, I like your site in general, but especially about making your own low voltage
filament lamps. I also like the museum of old lamps and thermionic valves too. My Name
is Mark, and I am an electronics engineer working in Aldridge, Walsall
at www.lektronix.net. We repair drives and controls there for industrial use. I read
your history, and I have always made projects and tinkered about with things too. My
parents had a "G8" too, and I kept on repairing it a lot! I used to visit "Thackers"
in Cheslyn Hay to pick up old radio bits, I am a radio amateur, and a hobbyist, as well
as working in electronics. One big project I did was to convert my Skoda Favorit to run
on LPG. It was a success, and I sold the car with it fitted some years later. I like your
filament lamps because they are nostalgic to look at, and the light is nice from them.
I don't like the CF lamps we use today, and I have been looking for some 240V squirrel
cage bulbs for my floor lamp in the lounge, as well as for my ceiling fan lamps as well.
I'm not sure how they stand vibration in a fan lamp, but they sure do look pretty.
I am looking for some way to start an online business, so I am always searching the
net looking for "bespoke" items, hence how I fell upon your website. I would love to
work for myself doing something, it does not have to be electronic either. I did a
search on "glass blowing lamps" and I found you from this search on Google. Thanks for
a great site.
Kamal Baid (India)
19 December 2008
Hi, I carefully read the amazing work done by you. I also noticed that you
acknowledge JLC Electromet as a Dumet supplier. Yes I developed production
of dumet wire from basic stage by reading and understanding the fundamentals
of glass to metal seals and properties of materials. I am a mechanical engineer
who has developed many many technologies, materials and very special purpose
machines including dumetplant for mass commercial production. Any body in
world and in any country if want to do any scientific work with Dumet of
any kind,(Bare,Borated,Oxidised or Nickel plated) I offer him free Dumet
for his Scientific work, Ex factory , Jaipur, India.
Any body want to share knowledge on Glass Sealing and material can contact me at
ksbaid@jlcelectromet.com
Once again I congratulate to you for doing wonderfull work by hand and assure you
of all of my Technical Support for the enhencement of this knowledge for the
betterment of all living being.
Kamal Baid
Galang Hakim (Indonesia)
8 December 2008
Hi Mr. hunt
its good to know that there are a great people that always share their experimental to the world
and thanks to you I can go on with my own research again
its a nice, great, and its fun to see this site after a long... long... tiredness searching.
by the way i would like to ask question how about we combine tesla coil and electron gun you had made, so we can transfer energi wirelessly Via electron modulate with specific frequency by tesla coil.
it seems fun but sounds crazy isnt it???
last words.... thanks for all of your experiments and keep the good job all the time
Cheer Hakim Galang
Reply from Teralab:
I think you may have invented the magnetron.
Tom K (USA)
23 September 2008
Dear Mr. Hunt, I found your website while searching for information on power
supplies for a metal evaporator. I didn't expect to find a hobbyist doing
these kinds of experiments, but I'm glad I did. So much fun, and an inspiration
to me, as I've been wondering if I could put an evaporator together to show to
my daughter's Kindergarten-1st grade (ages 5-7) class. Your work is an existence
proof that it can be done. Well done! Have you tried pumping down your vacuum
system with a glass of water inside the chamber? Maybe not so good for the
system, but it is fun to see water boil at room temperature!
Reply from Teralab:
Yes I have tried it. When you see it it's hard to believe it's at room temperature.
It is bad for the pumps but one can get away with it for a while with the gas
ballast fully open on the rotary pump. Better still use somebody else's pump.
Tim (New Zealand)
2 March 2008
Hi, normally I flick through various internet sites and look (at the 1 in 100 that
don't seem to be trying to sell you something) for a few mins..Ive been on yours
for hours..I love the kinds of things you're into myself...I pulled things to bits
when I was very young and have electrocuted,burnt and poisoned myself many
times...Now that im older I am a bit more careful and of course a lot wiser
from my mistakes and experiments...I was wrapt to see the tesla coil and I read
everything you have on the glass bulb type stuff...Im gonna give that a go..Its
hard to buy glass tube in this country as they think you're making drugs !!!In fact
I think I have read everything in your site and some of the link sites as well.
I think you did a great job with this site...Thanks for sharing it all...Cheers
Tim
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