isn't that going to get it hot enough in time to crack the seals? had
some guys working up a linear in 1971 at NDSU that just had the
filaments on a pair of 4-400s without the fan on, and killed 'em with an
ugly, loud cracking noise.

orange LEDs would be more authentic, I think, than red ones to make a
glow in the firebottle.

Dick Carroll wrote:

W8CRZ wrote:

I have a 3-500z tube and just want to make a conversation piece out of it. I
am going to make a wood base for it and I would also like to feed some
current into it just to make it glow.I was told it was possible but he
wasn't sure how or which pins to do it with. Also I know it is a 5 volt tube
and 14.5 amp.do I really need that much to make it glow? Would 12 volt work?
Thanks
Rob W8CRZ

You sure don't want to put 12 volts on it unless you want to burn out the
filament. It needs 5 volts. The transformer will have to supply the 14.5 amps or
it will not hold up, either. There are 5 volt transformers out there which have
no center tap that can be bought pretty cheap since they won't work out easily
for use in an amplfier..

Dick

-- If it's a "new economy," why do they want my obsolete old money?

On Fri, 19 Sep 2003 02:03:12 -0500, Scott Schrader
wrote:

isn't that going to get it hot enough in time to crack the seals? had
some guys working up a linear in 1971 at NDSU that just had the
filaments on a pair of 4-400s without the fan on, and killed 'em with an
ugly, loud cracking noise.

orange LEDs would be more authentic, I think, than red ones to make a
glow in the firebottle.

I like the LED idea, you'd want some bright ones....

Harvey

Add a couple of blue ones for a "gas" effect!

Harvey White wrote:

On Fri, 19 Sep 2003 02:03:12 -0500, Scott Schrader
wrote:



isn't that going to get it hot enough in time to crack the seals? had
some guys working up a linear in 1971 at NDSU that just had the
filaments on a pair of 4-400s without the fan on, and killed 'em with an
ugly, loud cracking noise.

orange LEDs would be more authentic, I think, than red ones to make a
glow in the firebottle.



I like the LED idea, you'd want some bright ones....

Harvey








--
Joe Leikhim K4SAT


"Jazz is not dead. It just smells funny." -F.Z.

On Sat, 20 Sep 2003 00:59:36 -0400, **THE-RFI-EMI-GUY**
wrote:

Add a couple of blue ones for a "gas" effect!

Now if you add a few flashing white ones, you have the "intermittent
short" effect....

Harvey


Harvey White wrote:

On Fri, 19 Sep 2003 02:03:12 -0500, Scott Schrader
wrote:



isn't that going to get it hot enough in time to crack the seals? had
some guys working up a linear in 1971 at NDSU that just had the
filaments on a pair of 4-400s without the fan on, and killed 'em with an
ugly, loud cracking noise.

orange LEDs would be more authentic, I think, than red ones to make a
glow in the firebottle.



I like the LED idea, you'd want some bright ones....

Harvey

"Harvey White" wrote in message
...
On Sat, 20 Sep 2003 00:59:36 -0400, **THE-RFI-EMI-GUY**
wrote:

Add a couple of blue ones for a "gas" effect!

Now if you add a few flashing white ones, you have the "intermittent
short" effect....

Harvey


Harvey White wrote:

On Fri, 19 Sep 2003 02:03:12 -0500, Scott Schrader
wrote:



isn't that going to get it hot enough in time to crack the seals? had
some guys working up a linear in 1971 at NDSU that just had the
filaments on a pair of 4-400s without the fan on, and killed 'em with
an
ugly, loud cracking noise.

orange LEDs would be more authentic, I think, than red ones to make a
glow in the firebottle.



I like the LED idea, you'd want some bright ones....

Harvey








Or you could modulate the led's in sync with your voice when your on the
air. Sorta like a 250TH in AM mode.

Dan/W4NTI

On Sun, 21 Sep 2003 15:58:29 GMT, "Dan/W4NTI" w4nti@get rid of this
mindspring.com wrote:

Or you could modulate the led's in sync with your voice when your on the
air. Sorta like a 250TH in AM mode.

How about key down lights it up as well... Then you can explain how
you are putting out so much power.....

Harvey

Dan/W4NTI

On Sun, 21 Sep 2003 15:58:29 GMT, "Dan/W4NTI" w4nti@get rid of this
mindspring.com wrote:

Or you could modulate the led's in sync with your voice when your on the
air. Sorta like a 250TH in AM mode.

How about key down lights it up as well... Then you can explain how
you are putting out so much power.....

Harvey

Dan/W4NTI

"Harvey White" wrote in message
...
On Sat, 20 Sep 2003 00:59:36 -0400, **THE-RFI-EMI-GUY**
wrote:

Add a couple of blue ones for a "gas" effect!

Now if you add a few flashing white ones, you have the "intermittent
short" effect....

Harvey


Harvey White wrote:

On Fri, 19 Sep 2003 02:03:12 -0500, Scott Schrader
wrote:



isn't that going to get it hot enough in time to crack the seals? had
some guys working up a linear in 1971 at NDSU that just had the
filaments on a pair of 4-400s without the fan on, and killed 'em with
an
ugly, loud cracking noise.

orange LEDs would be more authentic, I think, than red ones to make a
glow in the firebottle.



I like the LED idea, you'd want some bright ones....

Harvey








Or you could modulate the led's in sync with your voice when your on the
air. Sorta like a 250TH in AM mode.

Dan/W4NTI

On Sat, 20 Sep 2003 00:59:36 -0400, **THE-RFI-EMI-GUY**
wrote:

Add a couple of blue ones for a "gas" effect!

Now if you add a few flashing white ones, you have the "intermittent
short" effect....

Harvey


Harvey White wrote:

On Fri, 19 Sep 2003 02:03:12 -0500, Scott Schrader
wrote:



isn't that going to get it hot enough in time to crack the seals? had
some guys working up a linear in 1971 at NDSU that just had the
filaments on a pair of 4-400s without the fan on, and killed 'em with an
ugly, loud cracking noise.

orange LEDs would be more authentic, I think, than red ones to make a
glow in the firebottle.



I like the LED idea, you'd want some bright ones....

Harvey

Add a couple of blue ones for a "gas" effect!

Harvey White wrote:

On Fri, 19 Sep 2003 02:03:12 -0500, Scott Schrader
wrote:



isn't that going to get it hot enough in time to crack the seals? had
some guys working up a linear in 1971 at NDSU that just had the
filaments on a pair of 4-400s without the fan on, and killed 'em with an
ugly, loud cracking noise.

orange LEDs would be more authentic, I think, than red ones to make a
glow in the firebottle.



I like the LED idea, you'd want some bright ones....

Harvey








--
Joe Leikhim K4SAT


"Jazz is not dead. It just smells funny." -F.Z.