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Well, you might have been happy, Pete.
I discovered that the family cat's whiskers wouldn't work with a
bit of coke and we had to go back to a pair of baked bean cans and
string!
On 11/04/13 16:20, M0FMT wrote:
And we all live in a hole in the road but we were
happy!!.....:0)
73 es GL Pete M0FMT IO91UX
And
Wireless Set No.17 for £2:19:6 (2Volt
accumulator and HT Battery 10/- extra)
And we're all getting older!
73
On 11/04/13 12:18, M0FMT wrote:
Hi Graham
How young you are my introduction
to Tottenham Court Road (Proops?) , Lisles
Street (GW Smiths), Charring Cross and
The Edgeware Road about 1956. Aaaaah
those were the days. learnt
a lot about Radio, Life, the Universe and
everything there...... hee!
Got my R107 from Lisle Street with
money save from my apprentices pay.
Carried it (abt 1 CWT) via bus to Kings
Cross in the days when the conductor would
jump off the bus and give you had to get
it on board........ imagine that on a
"Bendy Bus" today. See http://www.retinascope.co.uk/lislestreet.html for
the full story.
OK on the stick info yes but I am
CW only really can't get too excited about
sterile data although as you know I do
partake occasionally.
73 es GL Pete M0FMT IO91UX
R Pete
Well , its possible to use
the emergency vfo , but
that results in a very
unstable signal , I
remember down the Tottenham
court road , there where tea
chests of crystals , but
that was 1970 .. seems a
lot of the traditional
firms have closed ,
One of the £5 dds with
a driver would work , but
they want to keep it
standard
DS - That's really the
'correct' situation , that
-33 db decode, -3 db lower
than normal was a good
indication that the
system is working , over
ranging the a/d is the
only problem . I think
dynamic range is 60 d b
after processing , is it 3
db per bit ? 8 bits , 24
db + 3 that's 27 dB ?
500:1 ? , but by
removing qty 2 mixers
and 2 oscillators , [ may
be 3 oscillators 1 ,
hf-up-conv 2 , pll conv osc
3 ref osc ) that is a lot
of noise + jitter removed
from the signal path as
well as imd from 2
mixers , I found a
attenuator helped for mw
and I have a mw-filter ,
which cleaned up sw bands
...... nice to have a
panoramic display , 2 mhz
this time , the ra17 was 1
mhz and 28 valves + 20 ish
> in the radio
73-G.
Sent: Thursday,
April 11, 2013 10:47 AM
Subject: Re: LF:
Wanted 10XJ or FT243 XTALS
Range 236.25 236.75 KHz
OK Graham
Thought it was home
brew retro.......... I am
in that mode and think
everbody else is! What do
you do at the moment
inject a Sig Genny?
Have you checked
the net or checked out
Vincent - QuartzLab etc?
Anyway what's that
master osc circuit. I
build from old RADCOM (pre
1975 when they published
real amateur radio) and
PW,QST etal. I use modern
xtals with no known
issues. Well trying to get
third overtone for 10m not
to chirp is an issue with
me at the moment.
OK yes got a stick
on its way didn't want to
tear up my existing
upconverter design. But
not sure there is much
wrong with the UC approach
it works for me. But want
to try the direct
approach. Do you get much
Cross mod and IM products?
73 es GL Pete M0FMT
IO91UX
Ok Pete
Q where to
have them
made ?
The set ,
Marconi Ocean
span 1950's
valve tx
needs the
big rock's
as the
oscillator
pass's quite
a lot of
power via
them ...hc6u
are no good
, drive level
is very low -
the ones
fitted are
the wired-
gold flashed
ones , so
cannot etch
into the band
...
the gang
want to
keep it
standard
73 -G.
Ps
waiting for
qty-3 £6
dongles : )
Sent:
Wednesday,
April 10, 2013
11:43 PM
Subject:
Re: LF: Wanted
10XJ or FT243
XTALS Range
236.25 236.75
KHz
Hi
If
you want to
spend a small
fortune get
them cut.
However build
a Mixer VXO
from El cheapo
standard xtals
and or old PMR
rocks. Then at
your next
rally buy a
couple of
Screw together
10xj or FT243
rocks of any
frequency and
put the
El-cheapo
xtals inside.
And Hey Presto
you have Retro
rocks.
I
have a small
all valve 472
tx that uses
6.00
-6.472=0.472
vxo-able a
couple of kc/s
12ax7-6am6-6cl6=
4wattso/p.
Local QRP rig.
Hope
this helps
73 es GL
Pete M0FMT
IO91UX
Wanted
10XJ or
FT243 XTALS
Range
236.25
236.75 KHz
Q Is
there any
manufacture
of crystals
in this
range ?
Or
Surplus
items
available
QTY 1
or 2 off
TNX-
Graham
G0NBD
--
73 de pat g4gvw
es gd dx
qth nr Felixstowe
East Coast UK
--
73 de pat g4gvw
es gd dx
qth nr Felixstowe
East Coast UK
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