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Valve/tube heater wiring

N

N Cook

Jan 1, 1970
0
Red and black wires to preamp and power amp tubes so presumably some
significance although ac straight off the mains transformer.
I marked the red lead but forgot to mark which post it was from before
de-soldering. I cannot find any www pics of the power supply section of Vox
AC30 CC1 recent variant, pointless hundreds of full frontal views though.
The ECC83s are commoned heater to centre-tap , what if I chose the wrong
"polarisation" , extra hum, nothing noticable, premature internal chemical
effects or what ?
 
N

N Cook

Jan 1, 1970
0
N Cook said:
Red and black wires to preamp and power amp tubes so presumably some
significance although ac straight off the mains transformer.
I marked the red lead but forgot to mark which post it was from before
de-soldering. I cannot find any www pics of the power supply section of Vox
AC30 CC1 recent variant, pointless hundreds of full frontal views though.
The ECC83s are commoned heater to centre-tap , what if I chose the wrong
"polarisation" , extra hum, nothing noticable, premature internal chemical
effects or what ?

I can be pretty sure which way I've put it back because of the set in the
thick wiring, almost as a loom.
More intrigued what the significance , if any, if it was put back the
"wrong" way.
 
M

Meat Plow

Jan 1, 1970
0
Red and black wires to preamp and power amp tubes so presumably some
significance although ac straight off the mains transformer.
I marked the red lead but forgot to mark which post it was from before
de-soldering. I cannot find any www pics of the power supply section of Vox
AC30 CC1 recent variant, pointless hundreds of full frontal views though.
The ECC83s are commoned heater to centre-tap , what if I chose the wrong
"polarisation" , extra hum, nothing noticable, premature internal chemical
effects or what ?

My educated guess would be that nothing noticeable will occur especially
if the sources is right off the mains transformer.
 
A

AJ

Jan 1, 1970
0
Agreed, probably a very low level hum noticable without any drive meduim
present.
 
D

Don Bowey

Jan 1, 1970
0
Hmm don't know how ever, I would like to know where at what point in
history did tube amps become named as valves ?

I've been around this circus for quite some time and the only names of
electronics i've ever heard of that were slurred slang, came from those
backyard mechanics, the midnight screw in buss fuse replacer with a
penny etc..

Back when CB was popular, I took a trip once to visit my relatives in
another state. when I got there, I was asked if I could remove the tooth
from their radio!. Now it took me a while to understand exactly what
they were talking about but after listening in on some local traffic, I
then understood the request.
I guess the clipper circuit was what, they were referring too.

Back then, little jobs like that were quickly done via a set of needle
clippers and a large bill presented to them afterwards. They generally
were happy if they could be heard generating harmonics in both
directions many KChz away.
Ok, good day.
The full, and original, name is Thermionic Valve; the name is in very early
writings regarding radio and thermionic current.

I think a Brit shortened it to Valve, and someone in the colonies started
calling it a Tube.

Don
 
J

Jamie

Jan 1, 1970
0
N said:
Red and black wires to preamp and power amp tubes so presumably some
significance although ac straight off the mains transformer.
I marked the red lead but forgot to mark which post it was from before
de-soldering. I cannot find any www pics of the power supply section of Vox
AC30 CC1 recent variant, pointless hundreds of full frontal views though.
The ECC83s are commoned heater to centre-tap , what if I chose the wrong
"polarisation" , extra hum, nothing noticable, premature internal chemical
effects or what ?
Hmm don't know how ever, I would like to know where at what point in
history did tube amps become named as valves ?

I've been around this circus for quite some time and the only names of
electronics i've ever heard of that were slurred slang, came from those
backyard mechanics, the midnight screw in buss fuse replacer with a
penny etc..

Back when CB was popular, I took a trip once to visit my relatives in
another state. when I got there, I was asked if I could remove the tooth
from their radio!. Now it took me a while to understand exactly what
they were talking about but after listening in on some local traffic, I
then understood the request.
I guess the clipper circuit was what, they were referring too.

Back then, little jobs like that were quickly done via a set of needle
clippers and a large bill presented to them afterwards. They generally
were happy if they could be heard generating harmonics in both
directions many KChz away.
Ok, good day.
 
E

Eeyore

Jan 1, 1970
0
N said:
Red and black wires to preamp and power amp tubes so presumably some
significance although ac straight off the mains transformer.

What significance did you have in mind ?

I marked the red lead but forgot to mark which post it was from before
de-soldering. I cannot find any www pics of the power supply section of Vox
AC30 CC1 recent variant, pointless hundreds of full frontal views though.
The ECC83s are commoned heater to centre-tap , what if I chose the wrong
"polarisation" , extra hum, nothing noticable, premature internal chemical
effects or what ?

That'll teach you not to make notes !


Graham
 
E

Eeyore

Jan 1, 1970
0
N said:
More intrigued what the significance , if any, if it was put back the
"wrong" way.

There's a 50:50 chance it'll hum less if that helps.

Graham
 
E

Eeyore

Jan 1, 1970
0
Jamie said:
Hmm don't know how ever, I would like to know where at what point in
history did tube amps become named as valves ?

At what point in history were they named by their shape instead of their function
? Typical Yanks.


Graham
 
J

Jamie

Jan 1, 1970
0
Don said:
The full, and original, name is Thermionic Valve; the name is in very early
writings regarding radio and thermionic current.

I think a Brit shortened it to Valve, and someone in the colonies started
calling it a Tube.

Don
Well, that's very educational.. Leave it up the brits to twist things
around.
Now I can understand thermionic valve description. We took that up in
school years ago in science class where we made a tube via a mayonnaise
lid with all the components on it and evacuated the jar. It was a very
impressive project. Used material from various sources to make the
heater, cathode, grid and plate that mounted on the lid.
Of course, it didn't perform like a properly made tube but it did
demonstrate activity of a triode when I was able to show that I
could control current via the control grid.

I do have an antique radio tech reference that is worth some money.
Maybe i'll brush through that book and see what else has been twisted
from the original electronic pioneers..

Btw, if my education isn't failing me, I seem to remember that Edison
was actually the first to discover the tube and didn't know it. His use
of a plate to collect the shoot was in theory the plate in a tube.
 
J

Jamie

Jan 1, 1970
0
Eeyore said:
Jamie wrote:




At what point in history were they named by their shape instead of their function
? Typical Yanks.


Graham
Go eat your crumpets you fringing tea sucker..
 
E

Eeyore

Jan 1, 1970
0
Jamie said:
Go eat your crumpets you fringing tea sucker..

I don't go anywhere near tea. It tastes of dead leaves.Yuk.

The Chinese stuff made from flowers however is very nice.

Graham
 
J

Jamie

Jan 1, 1970
0
Eeyore said:
Jamie wrote:




I don't go anywhere near tea. It tastes of dead leaves.Yuk.

The Chinese stuff made from flowers however is very nice.

Graham
if you like ingesting products grown in contaminated land
fills. go ahead.

We're getting our share of contaminated products here
in the states.
 
E

Eeyore

Jan 1, 1970
0
Jamie said:
if you like ingesting products grown in contaminated land
fills. go ahead.

I rather doubt they grow flowers for tea in contaminated landfill.

We're getting our share of contaminated products here
in the states.

Well ... 'you pays your money and takes your choice' as they say.

Btw, the food / cuisine in China was *EXCELLENT* bar a steak I had. They need
to work on beef. It was tough. If you ever find yourself in the Hong Kong /
Shenzhen area you must try the seafood too. It's totally awesome. Possibly the
best fish I've ever eaten.

Graham
 
M

Meat Plow

Jan 1, 1970
0
At what point in history were they named by their shape instead of their function
? Typical Yanks.

Hey we call plenty of things valves her in Yank land. What do you Brits
call a picture tube besides a CRT? A Picture Valve?
 
E

Eeyore

Jan 1, 1970
0
Meat said:
Hey we call plenty of things valves her in Yank land.

Go on ...... :)

Seriously, the British name 'valve' described very well the action of a 'vacuum tube'.
If you wanted to control the flow of something (electrons in this case) you'd use a
'valve' to control it. For example the 'tap' on a hand basin is a water valve.

As for the word 'tube', it describes the appearance quite well but little else.

Graham
 
M

Meat Plow

Jan 1, 1970
0
Go on ...... :)

Seriously, the British name 'valve' described very well the action of a 'vacuum tube'.
If you wanted to control the flow of something (electrons in this case) you'd use a
'valve' to control it. For example the 'tap' on a hand basin is a water valve.

As for the word 'tube', it describes the appearance quite well but little else.

I understand the valve terminology perfectly being a child of that
technology. Now I'll have to go research if "toobs" were ever called
"valves" here in yankland and if so just when and why did the split occur.
 
M

msg

Jan 1, 1970
0
Meat Plow wrote:

I understand the valve terminology perfectly being a child of that
technology. Now I'll have to go research if "toobs" were ever called
"valves" here in yankland and if so just when and why did the split occur.

Please post your findings ;) From my fifteen minutes of web and usenet
archive searching, I find nothing very helpful in this regard. If anyone
has access to Proceedings of the IRE (or its predecessors?) from the
early 1900s the references to thermionic devices may provide the U.S.
nomenclature.

Regards,

Michael
 
M

msg

Jan 1, 1970
0
Don said:
A good overview of tube history, however the article takes pains to
intermix the use of the terms 'tube' and 'valve' but does not
explain the history of usage of these terms vis-a-vis the U.S. and
elsewhere.

IMO, this would make a very interesting thread if started afresh with
a new subject heading and posted to appropriate NGs ;)

Regards,

Michael
 
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