childhood inventions
 

Y Dangle wrote:
"Brian Gaff" wrote in message
...
I recall the problems actually attempting to make a radio
transmitter from early transistors. Of course you could just build
an oscillator and modulate its amplitude, but that was not very
successful as no matter what you did, it had some FM tendencies
resulting in the middle of the carrier having an almost dead spot.
The only successful one was three transistors, a buffer and an
output stage which was tuned and then it worked quite well.
Brian

I made a radio transmitter with only one transistor, a point contact
one (it was a good job it only needed one, with the price then I
could barely afford one!). But it was a Morse TX, so the modulation
was from a on/off switch (key). I contacted quite a few fellow
Amateurs with it.
My first MW TX was one transistor with a telephone carbon mic
in the emitter giving it downward AM Mod

Steve Terry
--
Get a free GiffGaff PAYG Sim and £5 bonus after activation at:
http://giffgaff.com/orders/affiliate/gfourwwk

childhood inventions
 

In article ,
Martin wrote:
On Sun, 13 Jan 2013 23:43:36 +0000 (GMT), "Dave Plowman (News)"
wrote:

In article ,
Martin wrote:
Was it really a *steam* roller? You must be old!

I'm old enough to remember real steam rollers.

I can just remember steam trucks still in commercial use. Owned by a coal
delivery company, which might explain why.

I can remember the milkman delivering with a horse and cart. His name
wasn't Ernie.

I can remember the fishwife with a creel on her back. No idea what her name
was though, but I do remember Mr Cadona - the one man band.

--
From KT24

Using a RISC OS computer running v5.18

childhood inventions
 

In message , R. Mark Clayton
writes

"Graham." wrote in message
.. .
On Sun, 13 Jan 2013 15:14:30 -0000, "R. Mark Clayton"
wrote:

When I was 12 or 13 I D'xed Radio Peking on medium wave, but that is
another
story

In 1968 I could receive loads of American high school kids on 27 mc/s
on a Regonda stereogram, with just a few feet of wire as an aerial.
They seemed unaware that they could be heard on this side of the pond.

Foul language that I had never heard from a radio set before, so I had
to keep the volume down.

The odd thing about this was the frequency.

Not 'odd' at all. When the 27MHz CB band and the 28MHz amateur bands are
open, many long distance contacts are made - even with really low power.

Getting radio Peking (and much
else) on SW was easy

In fact the program ("and now we do our morning excercises") was beamed from
China to western USA.

Due to the time of day and year it was dark from UK across USA to eastern
China so I was getting twice bounced sky wave...

The signal may not have come as far as you think. Radio Peking was
relayed from Tirana, Albania - one of the frequencies being illegally in
the 7Mhz amateur band.

Actual equipment - bodged aerial and Wien receiver (that I still have
although it was thrown against a wall by burglars in 1976).



--
Ian

childhood inventions
 

"R. Mark Clayton" wrote in message
...


Radio Piccadilly ~1980

phone in guest: - Keith Joseph - he's an ****hole
James Standege - there is not need for that kind of language; have you got
something sensible to say.
phone in guest: - I am sorry I just got carried away there.
James Stanegge - go ahead then
phone in guest: - Margaret Thatcher; she is just a ****ing ****.
James Stanedge - that's enough of that then...
engineers - station jingle, adverts, call sign etc.


And did they ever manage to trace your phone number :-)

childhood inventions
 

In article , Martin wrote:
Was it really a *steam* roller? You must be old!

I'm old enough to remember real steam rollers.

I can just remember steam trucks still in commercial use. Owned by a coal
delivery company, which might explain why.

I can remember the milkman delivering with a horse and cart. His name
wasn't Ernie.

I can remember gas street lighting. There was one just next to the foot of
our front drive, so I often watched the guy who would come round regularly
to clean it. He'd arrive on a bicycle, which he had to steer with one hand
because he had his ladder over the other shoulder. Health and Safety cannot
at that time have been more than a gleam in some bureacrat's eye.

Rod.
--

childhood inventions
 

In article ,
Martin wrote:
I can remember gas street lighting.

Me too!

Remember a terrace of rented houses still with gas lighting when I were a
lad. Saw it from the tram on the way to school.

--
*IF ONE SYNCHRONIZED SWIMMER DROWNS, DO THE REST DROWN TOO?

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

childhood inventions
 

My first MW TX was one transistor with a telephone carbon mic

in the emitter giving it downward AM Mod

Oh, it was you went round robbing bits out of all the phone boxes was it?

Bill

childhood inventions
 

called a junk shop and hey presto ,free light and a bit of heat which

meant more 5p coins for important things like beer.

Post-decimalisation? I remember that in the 1960s our gas meter took shillings, as did everyone else's, so the coins were always in short supply.

Bill

childhood inventions
 

In article , Steve Terry
wrote:


I remember Steam Lorries, i'll get my zimmer frame

The current issue of 'Hi Fi World' features a steam-driven turntable for
playing ye olde-fasioned LPs.

No doubt a steam-powered NAS music server will be along soon...

Slainte,

Jim

--
Please use the address on the audiomisc page if you wish to email me.
Electronics http://www.st-and.ac.uk/~www_pa/Scot...o/electron.htm
Armstrong Audio http://www.audiomisc.co.uk/Armstrong/armstrong.html
Audio Misc http://www.audiomisc.co.uk/index.html

childhood inventions
 

In article ,
wrote:
Being a private meter I expect the landlady had put off replacing it
for as long as possible rather than fork out for a new one. No idea if
she could adjust amount you got for 5p but it didn't last long.

The actual coin part usually lifted out (after unlocking the coin box) and
could be inserted to give many different amounts of gas for your shilling.
And usually set for a high profit. Think it may be illegal now.

--
*I went to school to become a wit, only got halfway through.

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