gareth evans wrote:
On 20/12/2020 16:53, Max Demian wrote:
On 20/12/2020 14:42, williamwright wrote:
On 15/12/2020 15:42, Dave Plowman (News) wrote:

Think it's a very long time since I've had a radio that would run the
battery flat while stopped for half an hour or so?


Don't they have a row a little valves nowadays then, and an inverter?

An inverter would be rather posh. More likely a vibrator power supply.


AIUI there were valves developed to run off 12v HT specifically for
use in automobiles.

Yes, but they used transistor output stages with those, you couldn't
drive a loudspeaker with 12v HT valves.

So the evolution sort of went:-

'Ordinary' valves using 'high' voltage (i.e. 100 volts or more)
with a vibrator power supply stepping up the voltage from the 12v
car battery.

12v HT valves for the RF and IF stages followed by transistor
output stages, all running off 12v.

All semiconductor radios when RF transistors became available
economically.

--
Chris Green
·

On 20/12/2020 18:17, Chris Green wrote:

All semiconductor radios when RF transistors became available
economically.

Were they the Green Spot or the White Spot amongst those being sold
off to amateurs from otherwise manufacturer's rejects?

I remember in the late 1960s, I owned one, only, germanium transistor
which I did not dare solder for fear of causing further migration
of semiconductors into a resistor!

In article ,
gareth evans wrote:
I remember in the late 1960s, I owned one, only, germanium transistor
which I did not dare solder for fear of causing further migration
of semiconductors into a resistor!

I still have a soldering heatsink I made - a small crock clip with thick
copper wire soldered into the jaws

--
*When a clock is hungry it goes back four seconds*

Dave Plowman London SW
To e-mail, change noise into sound.

On 21/12/2020 00:58, Dave Plowman (News) wrote:
In article ,
gareth evans wrote:
I remember in the late 1960s, I owned one, only, germanium transistor
which I did not dare solder for fear of causing further migration
of semiconductors into a resistor!

I still have a soldering heatsink I made - a small crock clip with thick
copper wire soldered into the jaws


And at some time, Practical Wireless gave an aluminium tweezer-like
heatsink to clip onto leads whist soldering. I still have mine
somewhere

On 20/12/2020 16:53, Max Demian wrote:
On 20/12/2020 14:42, williamwright wrote:
On 15/12/2020 15:42, Dave Plowman (News) wrote:

Think it's a very long time since I've had a radio that would run the
battery flat while stopped for half an hour or so?


Don't they have a row a little valves nowadays then, and an inverter?

An inverter would be rather posh. More likely a vibrator power supply.

well that IS a sort of invertor...


--
"A point of view can be a dangerous luxury when substituted for insight
and understanding".

Marshall McLuhan

On 20/12/2020 16:53, Max Demian wrote:
On 20/12/2020 14:42, williamwright wrote:
On 15/12/2020 15:42, Dave Plowman (News) wrote:

Think it's a very long time since I've had a radio that would run the
battery flat while stopped for half an hour or so?


Don't they have a row a little valves nowadays then, and an inverter?

An inverter would be rather posh. More likely a vibrator power supply.

I didn't like to say vibrator in case there were ladies present.

Bill

On 21/12/2020 09:28, gareth evans wrote:
On 21/12/2020 00:58, Dave Plowman (News) wrote:
In article ,
** gareth evans wrote:
I remember in the late 1960s, I owned one, only, germanium transistor
which I did not dare solder for fear of causing further migration
of semiconductors into a resistor!

I still have a soldering heatsink I made - a small crock clip with thick
copper wire soldered into the jaws


And at some time, Practical Wireless gave an aluminium tweezer-like
heatsink to clip onto leads whist soldering. I still have mine
somewhere

I have always simply squashed the jaws of a small croc clips so they
resemble serrated scissors and used them. You can three or four in a row
as the squashed jaws are only about a mm wide.

Bill

On 20/12/2020 15:29, critcher wrote:



think if I had sex with an engine, I wouldnt care about the heater being
on.

Once when I was on some drug or other it made me randy as hell and I
remember sitting in a pub eyeing up the coin slot on the jukebox. And my
mate actually did put his knob up the silencer pipe of his Escort for a
laugh.

Bill

On 20/12/2020 15:32, critcher wrote:
On 20/12/2020 15:29, critcher wrote:
On 20/12/2020 14:38, williamwright wrote:
On 15/12/2020 10:59, T i m wrote:

I think it *is* a good idea if all engines are cut off if left idling
for say 5 mins or more (unless in 'engineering mode') to stop all
those who park up, leave their headlights on and sit there talking /
eating for 20 mins with the engine running. ;-(

There's a layby near my house and people often do this. They also
have sex with the engine and heater on. I wouldn't be able to
concentrate; I'd be worrying about the gear lever being knocked.

Bill


think if I had sex with an engine, I wouldnt care about the heater
being on.


not that there is much chance after prostate problems eh Bill ?

Not after what I had done.

Bill

williamwright wrote:
On 21/12/2020 09:28, gareth evans wrote:
On 21/12/2020 00:58, Dave Plowman (News) wrote:
In article ,
Â*Â* gareth evans wrote:
I remember in the late 1960s, I owned one, only, germanium transistor
which I did not dare solder for fear of causing further migration
of semiconductors into a resistor!

I still have a soldering heatsink I made - a small crock clip with thick
copper wire soldered into the jaws


And at some time, Practical Wireless gave an aluminium tweezer-like
heatsink to clip onto leads whist soldering. I still have mine
somewhere

I have always simply squashed the jaws of a small croc clips so they
resemble serrated scissors and used them. You can three or four in a row
as the squashed jaws are only about a mm wide.

I used to use the simple method of holding the wire in a pair of small
flat faced pliers while soldering, I don't think I ever destroyed a
transistor or diode by overheating it. Much more common (destruction)
in my case was the wire dropping off from fatigue after multiple
re-uses!

--
Chris Green
·

In article ,
Chris Green wrote:
I have always simply squashed the jaws of a small croc clips so they
resemble serrated scissors and used them. You can three or four in a
row as the squashed jaws are only about a mm wide.

I used to use the simple method of holding the wire in a pair of small
flat faced pliers while soldering, I don't think I ever destroyed a
transistor or diode by overheating it. Much more common (destruction)
in my case was the wire dropping off from fatigue after multiple
re-uses!

Solder to the work, not iron. ;-)

--
*Middle age is when it takes longer to rest than to get tired.

Dave Plowman London SW
To e-mail, change noise into sound.