IT department still haven't taken it, I might be found harvesting
useful
components from the monitor for homebrew projects! The wire in the field
deflection coils are useful for winding coils from. There must be other
useful stuff in there too!

IT department still haven't taken it, I might be found harvesting
useful components from the monitor for homebrew projects! The wire in
the field deflection coils are useful for winding coils from. There
must be other useful stuff in there too!

-----Original Message-----
From: Ron Brink [mailto:pa2rf@...]
Sent: 10 February 2005 07:14
To: BITX20@...
Subject: Re: [BITX20] RE: Recycling monitors

Nice picts Hans,

Sure it is possible to make a CW?tx with your retained monitor parts.

I saw voltage regualtors,?an IRF MOSFET, splendid for a several watts pa stage and some nice 74hct... ic's. Good enough to make a nice stable oscillator with an x-tal.

I wonder how many used fine working components are thrown away on daily basis, worldwide. This must be an enormous figure and what a waste of energy, material, effort,...

The average age of a PC these days is maybe 3 years, then it's thrown away...

bye

ron

pa2rf

Hans Summers <Hans.Summers@...> wrote:

Ok, last off topic post from me on this subject... I completed the
dismantling of the monitor and posted the pictures on my web page at
. Just look at
this long list of all the nice components I found inside! There's enough
here to build a very nice CW transceiver and other useful stuff!

73 Hans G0UPL



Integrated Circuits:

LM324 Quad Operational Amplifier (SMD)
KA358 Dual operational Amplifier
74HCF4011 Quad 2-input NAND gate (SMD)
74HCT02 Quad 2-input NOR gate (SMD)
74HC86 Quad 2-input XOR gate (SMD)
74HCT74 Dual D-type Flip Flop (SMD)
74HCF4053 Tripple 2-channel multiplexer (SMD)
UC3842 Current mode PWM controller
TDA9105 Deflection processor
LM1283 140MHz RGB Video Amplifier
MAS9181 Eight discrete 8-bit Digital-Analogue converters in one IC, I2C
programmed
CVA4401 Triple 400MHz buffer
CR6727 Triple hybrid video amplifier
LM2940 12V 1A Voltage Regulator
7805 12V 1A Voltage Regulator
Several other custom IC's which I couldn't find datasheets for on the
internet

Other semiconductors:

SLA5038 5-MOSFET array
Several LARGE rectifier diodes
Several zener diodes
Numerous small signal diodes, look like 1N4148, both SMD and normal
Numerous small transistors, both SMD and normal
Several IRF-series TO220 MOSFET's, e.g. IRF620
Several BD-series bipolar power transistors e.g. BD135
5mm green LED

Other components:

Numerous resistors, both SMD and normal, various power ratings
Numerous capacitors, both SMD and normal, including many useful
electrolytics
Notable LARGE 330uF 385V smoothing capacitor in ! the mains rectifier
Two small neon bulbs, used as spark gaps
8MHz quartz crystal, HC49 case
Numerous inductors and transformers, but no toroids
12V Relay, dual pole changeover
Numerous preset potentiometers
Five small push buttons
Approx 10 metres of shielded cable, i.e. 5 shielded conductors in the cable



-----Original Message-----
From: Hans Summers
Sent: 08 February 2005 17:57
To: 'BITX20@...'
Subject: RE: Recycling monitors



P.S. For those who don't get attached pictures, they're also in the group
photos under G0UPL/recycle

73 Hans




-----Original Message-----
From: Hans Summers
Sent: 08 February 2005 17:56
To: 'BITX20@...'
Subject: OT: Recycling monitors



Latest news, following Paolo's influence: I have commenced dismantling of
the previously mentioned 19-inch DELL monitor, which the IT department
failed to remove from the cupboard next to my desk here in the office!

Inside I found a secondary RF shielded box made from thin sheet metal. Very
difficult to remove. Attached are the pictures so far. You can see that I
managed to open 1 side of the RF shield box and see the back of the PCB.
Still haven't glimpsed the front of the PCB. I will make a page on my site
about this, following Paulo's example, and list the useful things I find
inside! Later, I will add links to that pages, to other projects on my
website, to show where I used the parts. Recycling is fun! I've been using
old recycled parts for all of my electronics hobby since I was 5 or 6 years
old. Now it's time to document this side of things!

73 for now

Hans G0UPL


-----Original Message-----
From: Paolo Cravero as2594 [mailto:pcravero@...]
Sent: 03 February 2005 17:52
To: BITX20@...
Subject: Re: [BITX20] Stability?



Hans Summers wrote:

> IT department still haven't taken it, I might be found harvesting
> useful components from the monitor for homebrew projects! The wire in
> the field deflection coils are useful for winding coils from. There
> must be other useful stuff in there too!

Been there! :-) And written about it. See


Also featured: VCR, CD-ROM and laptop. One day I will add TV and
floppy-disk drives as well.

Paolo IK1ZYW

PS: when I dismantled that monitor I was not yet into winding coils, so
I just kept the inductors, which I am now using as wire source.

PPS: hot-air guns are a great tool for part scrounging! (but you MUST do
it in open-air and dry ! WX ;-) )



Yahoo! Groups Links

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Ron

I think it is possible to make a CW transceiver, not just

are op-amps which make audio amplification and filtering easy.

transistors for an audio amp. But the oscillator would have to be a

crystal, since the only crystal in the monitor is 8MHz which is not

for an amateur band. I guess you could pull it down a little and

(with the 74HCT74) and put it at the top of top band. The only

is any toroids, this monitor contained NO toroids at all! Plenty of

airwounds, and many inductors and small transformers which might

You're right about the waste! I also have here an "old" IBM

borrowed from my office. This thing must've cost over ?2,000 when

XYL used it for accessing the internet. But something became

when starting, it refuses to start Windows 98 in the proper mode

in "safe" mode) and complains that the file user.exe is missing. So

brought it back to the IT department. The internal CD drive is not

The external plug-in floppy drive is missing. And apparently, this

so old that any other employee is no longer using this model, so it

possible to borrow a floppy drive. They said it would take much too

take out the harddrive, plug it into something else, and try to

file. The computer is so ancient that it isn't worth spending time

they say. So they lent me a more modern laptop (but still one which

consider quite old). So this IBM Thinkpad laptop is now mine for
dismantling. Just out of interest, I was curious about what was

"ancient" so I asked the IT boys how old the Thinkpad is; the

years old"...

73 Hans G0UPL


2-input NAND gate (SMD)
74HCT02 Quad 2-input NOR gate (SMD)
74HC86 Quad 2-input XOR gate (SMD)

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-----Original Message-----
From: Ron Brink [mailto:pa2rf@...]
Sent: 10 February 2005 10:39
To: BITX20@...
Subject: RE: [BITX20] Re: Recycling monitors

okidoki Hans,

i'll keep you entertained while your collegues enjoy themselves at the party...

Thanks for info on the mozilla browser. i was not aware of any viewing programs.

now i am? Saw that about 15% of my visitor use mozilla, so there is something to?improve.

you're far ahead of me with the polyphase rx !?i read about it but never attempted to build something like that.

Fully agree with you about the overrated power of our office pc's; here we do something microsoft office stuff like excel, word, some mailing, surfing and so on. A 300 MHz PC would be good enough, but all of us have 2.4 GHz pentium4 machines....And inspite of this we get network failures all the time...

About the zx81, i did attach a real keyboard with big keys at the time too (i remember it was orange and i put lots of extra codes on it and there was something with a matrix). All this typing of the BASIC codes...pfff.

Later i got the spectrum as well (48K !!) with the rubber keys and 4 functions for each key :-)). That was great fun.

I have put the panorma rx into an old vcr housing and it still works grand.

Ok i have to leave the office for some moments, go down into the hangar to witness a modification on one of the boeing767 aircraft ( i am working for a dutch airliner).

ron

pa2rf

?

Hans Summers wrote:

Ron

I was thinking of a polyphase direct conversion receiver, for single signal
reception! The monitor contains a 74HC4053 tripple 2-1 Multiplexer. I feel
that can be made into a Tayloe detector! The 74HC74 can generate the
necessary quadrature oscillator switching signals. Enough R's and C's for a
simple passive polyphase network. It even has a nice 12V 2-pole changeover
relay, perfect for transmit/receive switching! Since switches are lacking,
there can be no transmit switch and so the rig must be semi-QSK. Plenty of
MOSFET's are available for a PA.

At home I used a 100MHz Pentium for 9 years. It was fine. If all you want is
Internet, email and perhaps a spreadsheet or word document, it does the job!
My XYL forced me to get rid of it because she said it was too old. Well, I
said yes it's old but look, it works fine and it does everything we need it
to. But no, she still insisted it was "too old" so it had to go. She wanted
to buy a new one, but she hasn't got around to it and that's why she has to
use the borrowed office laptop!

Around me here in the office everyone has 2.8GHz machines. But what do they
use them for? Most of them are just watching prices, graphs, writing emails,
documents or spreadsheets, looking at the internet. Nothing that my old
100MHz Pentium couldn't have done! My PC is 3.2GHz but that's because I run
some heavy calculations and simulations on it so I need the CPU power.

I did take apart plenty of colour TV's years ago, but not for some years.
Video players are a good source of RF parts too. I have visited your website
several times before and I saw your panoramic receiver, very nice! By the
way, your website doesn't work properly in the Mozilla Firefox browser. The
background and images don't show. But I still have Internet Explorer
installed here so I could view it fine.

I had a ZX81 too. It was given to me by my late Grandfather: the old fellow
in his late 70's had embraced the exciting new world of computing with open
arms and before long, was programming in BASIC and machine code. He had been
a lifelong electrician on the British Railways. He gave me his ZX81 when he
upgraded to a ZX Spectrum the following year (1982?). The ZX81 had 1K of
memory and a 16K expansion pack. But I modified my ZX81. I added a real
keyboard, ???5 from a surplus store. Also a 32K memory board (16 2K RAM
chips!), ???2 from the same store! The keyboard had hall-effect magnetic
proximity switches not real contacts. I had to build an interface consisting
of 16 transistors (from old circuit boards), to connect it in place of the
ZX81's matrix keyboard. See a picture:
. The wooden board at
the back held the ZX81 board on one side, and the modified memory PCB on the
reverse. So my ZX81 actually had 32K of memory! If I remember right, it
would perform its own check on switch on, and recognise how much memory was
connected. Happy times!

I should continue with my work too... But most of my colleagues went to
MIAMI this week on a company conference (sounds like a feeble excuse for a
big party) and left me and a handful of others behind to "hold the fort". I
am not happy. That's why I wasted time yesterday on important matters such
as monitor dismantling? ;-)

73 Hans G0UPL



-----Original Message-----
From: Ron [mailto:pa2rf@...]
Sent: 10 February 2005 09:20
To: BITX20@...
Subject: [BITX20] Re: Recycling monitors




Ha!! 3 years. that is also what our IT dept in my office
considers 'old ' (obsolete they say). Yes you are right, opamps make
life easy and a simple dc receiver should not be a problem. My hands
are itching to demolish my DELL 15" monitor in front of me now and
convert it into a QRP transceiver:-))
What's old? At home i use a 5 year old Celeron 266MHz and it runs
MixW.2, CWget, CWtype and more ham programms very smoothly. And it
has an extensive 128 Meg RAM. I remember the days I bought my first
computer, a sinclair ZX81 for almost 400 guilders (200 euro) at that
time (earlie 80's ??) a huge amount. Everybody was so happy with 16k
ram....!! So we are really spoilt these days with all kinds of fancy
2nd hand equipment and all the free ( :-)? ) software from Bill G. In
spite of all the complaining about windows he is one of the few
persons who's been able to standardize specs worldwide (apart from
some Mac & linux machines). Great job! Nobody has been able yet to
launch a worldwide standardized AC MAINS voltage.....
And about demolishing equipment. Try a color TV set! I did a couple
of times. A real goldmine. For example I made a panorama receiver
(low budget spectrum analyser) using a Philips UV6.. tuner derived
from a TVset. It works great in the 47-860 MHz range. If you like,
see my description on my website: --> meten
---> vhf..panorama ontvanger

I'll guess i will continue with my work now... that's what i am paid for...
By the way, nice chatting with you Hans
73
ron
pa2rf

--- In BITX20@..., Hans Summers wrote:
>?
> Ron
>?
> I think it is possible to make a CW transceiver, not just
transmitter! There
> are op-amps which make audio amplification and filtering easy.
Plenty of
> transistors for an audio amp. But the oscillator would have to be a
VFO not
> crystal, since the only crystal in the monitor is 8MHz which is not
suitable
> for an amateur band. I guess you could pull it down a little and
divide by 4
> (with the 74HCT74) and put it at the top of top band. The only
lacking thing
> is any toroids, this monitor contained NO toroids at all! Plenty of
wire for
> airwounds, and many inductors and small transformers which might
assist.
>?
> You're right about the waste! I also have here an "old" IBM
Thinkpad laptop
> borrowed from my office. This thing must've cost over ???2,000 when
new. My
> XYL used it for accessing the internet. But something became
corrupted and
> when starting, it refuses to start Windows 98 in the proper mode
(it starts
> in "safe" mode) and complains that the file user.exe is missing. So
I
> brought it back to the IT department. The internal CD drive is not
working.
> The external plug-in floppy drive is missing. And apparently, this
laptop is
> so old that any other employee is no longer using this model, so it
isn't
> possible to borrow a floppy drive. They said it would take much too
long to
> take out the harddrive, plug it into something else, and try to
repair the
> file. The computer is so ancient that it isn't worth spending time
fixing,
> they say. So they lent me a more modern laptop (but still one which
they
> consider quite old). So this IBM Thinkpad laptop is now mine for
> dismantling. Just out of interest, I was curious about what was
considered
> "ancient" so I asked the IT boys how old the Thinkpad is; the
answer: "3
> years old"...
>?
> 73 Hans G0UPL
>?
>
> 2-input NAND gate (SMD)
> 74HCT02 Quad 2-input NOR gate (SMD)
> 74HC86 Quad 2-input XOR gate (SMD)
> > >
> *????? Your use of Yahoo! Groups is subject to the Yahoo! Terms of
Service
> <> .
>
>
>
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-----Original Message-----
From: Ron Brink [mailto:pa2rf@...]
Sent: 10 February 2005 12:03
To: BITX20@...
Subject: RE: [BITX20] Re: Recycling monitors

Hi agn Hans,

Yes dear forum members, tell me if i am boring...

ZX spectrum, now i think of it i get visions of programms like FROGGER and TETRIS. Very funny. I did some Mandelbrot things as well on a Sharp MZ800. The program ran for 2 days end ended with a nice colour pict. on the TV screen. My used-to-be girlfriend (now wife) switched off the mz800 after 75% of the pict was finished. Made me angry, but she said it was my own fault (i had the tv set switched off of course). Now the MZ800 is in a corner and i retained the 17 MHz VXO and lm386 1 watt audio amp in it HI.

Just visited the homebrew zx spectum site you showed, this man is uh... let's call it 'amazing'. On ebay you get zx spectrums almost for free now ( ? ).

Work here can be boring as well. Ever made a reliability report with comlaints, delays and so on? But yes, sometimes there are nice things going on (also in the field of radio comms). And sometimes real bloodpressure increasing problems (AOGs=aircraft on ground) pop up. Tomorrow my hufandpuf components will arrive i saw in the mailbox. I will do some soldering during the weekend i guess. Altough there is a PACC contest on shortwave and the children want to play soccer, basketball and watch spoungeBOB (Are you ready ??)

Showed my collegues your homebrewed capacitors with the aluminiumfoil. They think its great !! And i think your QRPP experiment (beacon) is fantastic. Any new ideas in that direction?? Like your 1 chip freq counter as well....
ron
Hans Summers wrote:

?

Ok Ron

?

Hope the rest of the BITX20 group are not bored by all this off-topic chat. Perhaps it is interesting to learn and be inspired by the contents of my old monitor and what can be done with it! Anyway this group is somewhat quiet normally... so excuse us ;-)?? You could always complain to the moderator. Ooops. That's me. Well make that complaint to Farhan then, the other moderator!

?

In London it is cold, windy and a little wet. I bet in Miami they have sunshine and are enjoying the beach, in between their "conference" Pahhh

?

I had a ZX Spectrum too! I wrote many things for it, including an Assembler/Disassmbler which was written in BASIC but allowed me to easily write machine code (assembler), after that. I used to love playing with the Mandelbrot set. I have a web page about it: ?where you can see (and run)?a ZX81 version. One of the things I did with that ZX81 was print a 1024?x 1024 pixel mandelbrot set on the small thermal printer, just 4-inch wide (10cm) paper strips with 256 pixel horizontal resolution, so I glued 4 long strips together. It was great! The printing part was in machine code (since the ZX81 did not have pixel graphics, only text and some symbols, so had to be "persuaded"), the rest was in BASIC. The program took about 1 week running continously, to print my mand! elbrot set! Later I wrote a version on the ZX Spectrum which ran in 10 hours in BASIC. Then I wrote the maths in Z80 machine code and had it going in less than 7 minutes runtime (for the same image). All that is still awaiting me finding the time to put it on my website.

?

Did you know you can build your own ZX Spectrum, using all 74HC-series logic etc no special "custom" chip? See ?. Someone did a similar ZX80 ?and I think there is a homebrewed ZX81 somewhere too! Homebrewing a ZX Spectrum is another thing I want to do someday.

?

It was Heinz OE5EEP who got me on this Mozilla thing. My own website didn't work quite right either, despite it being just simple plain HTML! There was a simple 1-line error in the HTML. It seems that Microsoft Internet Explorer is somewhat tolerant of HTML faults, which other browsers are not. Since IE is so prevalent, many website writers only test on IE, and since it tolerates many errors, they don't know there is a problem.?The sceptical could consider it?slightly sneaky way for MS to gain market share, but perhaps it is unintentional. Mozilla Firefox is a nice browser, fast and with useful extra features.

?

I used to like visiting the pilots when taking commercial flights. But since the World Trade Centre that seems no longer possible. Sounds fun watching the aircraft modification! I just sit here running simulations, watching stupid markets move in unexplained directions, and wishing I was on a Miami beach :-/? But I can dream anyway about polyphase direct conversion CW transceivers made from old monitor parts!

?

73 de Hans G0UPL

?

?
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-----Original Message-----
From: Ron Brink [mailto:pa2rf@...]
Sent: 10 February 2005 13:58
To: BITX20@...
Subject: RE: [BITX20] Re: Recycling monitors

Hello Hans,

?

Tnx very much for your message with all the good information. I enjoyed your dedicated ECL82 experiments. 30 m is a special band. I made this 30m-CW rig working on 10.106 and 10.116 MHz Xtals and irf510 in the PA. I like the clicking of the tx relay when the thing is transmitting. And yes I can give cq cq while soldering :-)) Made about 50 qso's with it now (SP, D, I, OM, OK). Since i do not speak morse, i use cwget and cwtype on my 266 MHz celeron, and it works great. I am surprised the dc receiver with so41p works great with my 14m attic antenna.

AM broadcast break-through is minimal.

Have a look at ?. Only Dutch i am afraid. Translation to follow.

The 30m beacon results on the hidden page are very original. Nice graphics and diagrams. This really starts to look like science. Must have taken you a couple of days to collect all data.

Sure I know Tinky-winky, Dipsy and LaLa !! Tweenies are new for me. I'll ask my son, he is 9 and probably knows...

73 tnx fer fb chat

Ron

PA2RF

?

?

Hans Summers wrote:

?

Hello Ron om

?

My 2-year old daughter isn't ready for Squarepants yet. She still likes "The Tweenies" and "Teletubbies". These are probably very UK specific and you don't know what they are... please don't ask! Sometimes I make her watch Tom & Jerry instead, so that I can enjoy it too ;-)

?

Someday I would like to make an entire transmitter (and maybe receiver) using homemade components, including homemade valves. More dreams for the future.

?

You asked about my beacon - there is another "hidden" page ?which contains more recent experiments and results. Recently I built a DDS generator to obtain a rock solid, predictable frequency source for the QRSS beacon. See ?. Again, no microcontroller. My 30m QRSS beacon is currently QRV to an attic dipole, on frequency 10,140,050 +/- 2Hz. The message is my callsign in QRSS3, followed by slow-Hellschreiber (14Hz "height", 1 second half-pixels, i.e. 98 seconds per character), followed by my "crown" signature trademark repeated 6 times and of course a quick 12wpm CW ident. Power is 250mW estimated. You need spectrum ! software running on a computer to be able to decode this weak signal. But it's there 24 x 7, European listeners should have no trouble finding it.

?

There are other non-linked up pages on my website too. The place needs some work. One of these, is the page about my modifications to my 1-valve ECL82 80/40m CW transmitter which is still the ONLY transmitter I have ever made QSO's with (550 in total, now). The BITX20 awaits debugging of the PA. I converted the TX to operate also on 30 and 20m. I added coil taps and crystals, so now have 8 installed: 3.558, 3.560, 7.010, 7.030, 10.106, 10.125, 14.060, 14.060. See ?. The reason I mention this, is that you will notice if you scroll down, that I modified the TX also adding a keying relay, then connecting everything up to my QRSS beacon controller... then I programmed (by hand, with the toggle switches) one of the 8 EEPROM channels of the beacon, to contain: "CQ CQ CQ DE G0U! PL G0UPL G0UPL CQ CQ CQ DE G0UPL G0UPL G0UPL K" wait a bit, then call again. This is hilarious! Lots of relay clicking. So I can call CQ without touching the key. Great so I can continue soldering the projects while I call CQ. I am now at the stage where my CW is good enough that if condx are good and the other op sends reasonable CW, I can just about copy him in my head without writing everything down. Which again, means I can continue my soldering even during a QSO!

?

73 Hans G0UPL

?

.

?

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Hi Ron

I like 30m too. One of my other projects is a miniature CW

30m. Nice job on the 30m rig, I hadn't seen that on your site

think it is newer than when I previously visited. I have a 30m

conversion receiver see

<> but it suffers

of broadcast breakthrough. Nevertheless I had some nice QSO's on it
including my first Italian station. Perhaps when I am next able to

station QRV again on 30m we can try a QSO! PA might be a little too

for 30m though, except under unusual band condx.

Hmm so you have teletubbies too. My daughter loves them. She's 2 on

April. Only problem is, she gets very angry when the programme

blames it on me. What does she want me to do? Telephone the BBC and

to play it again? Ah well, guess I shouldn't have dismantled the

recorder ;-)

73 Hans G0UPL

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Hello Ron

My VFO uses just a simple 74LS04 inverter, and it's surprisingly

at 10MHz, after some warm-up time. Perfectly adequate for a CW QSO.

problem with it is that I did not gear the tuning knob, so the

is very fast! By the way, speaking of recycling - that tuning

out of a 1970's radio tuner which I dismantled. I found it at the

dump a year ago. I had a car full of garden waste which I was

I saw this thing on the ground next to the door where you pour the

The strangest thing happened! All by itself, it just jumped off the

and into the boot of my car!

All I know about the Tweenies and Teletubbies is that in both

wear ridiculous suits in bright colours, have silly names, and

singing funny songs. My daughter is the expert ;-)

73 Hans G0UPL


-----Original Message-----
From: Ron [mailto:pa2rf@y...]
Sent: 11 February 2005 07:20
To: BITX20@...
Subject: [BITX20] Re: Recycling monitors




Good morning OM
Nice 30m rx Hans!
Similar to the dc rx i built, altough i used an old so41p (which

not produced anymore). And i have used to x-tals for the oscillator
instead of a free vfo. Ordered them from Funk Amateur a magazin in
Germany. The complete trscvr is in an old CD-player housing now.

a nice Aluminium plate on the front, it looks brand-new (Where did
you buy that ...)
Sometimes there is some broadcast breaktrough but not often. I
discovered that around 11 o-clock in the morning and 4 o-clock in

afternoon i get the best results. Stations seems to be around the
corner. I worked with 5 watt station from Poland which was awfully
loud. If condx are there it is a great band.
During evening the band seems dead last couple of weeks. I think G -

PA is too short distance for 30m but we can try if you like. I only
have 10,108 and 10,118 on cw available...OK, i asked my son about
Tweenies. He said they are similar to the Tubbies and further

to talk about it :-((
He is into Yu-kiyo, Spongebob Squarepants and The Karate Kid these
days...
bye
ron

--- In BITX20@..., Hans Summers <Hans.Summers@t...>

Hi Ron

I like 30m too. One of my other projects is a miniature CW

transceiver for

30m. Nice job on the 30m rig, I hadn't seen that on your site

before, I

think it is newer than when I previously visited. I have a 30m

direct

conversion receiver see

<> but it suffers

from plenty

of broadcast breakthrough. Nevertheless I had some nice QSO's on

including my first Italian station. Perhaps when I am next able to

get my

station QRV again on 30m we can try a QSO! PA might be a little

close

for 30m though, except under unusual band condx.

Hmm so you have teletubbies too. My daughter loves them. She's 2

1st

April. Only problem is, she gets very angry when the programme

finishes and

blames it on me. What does she want me to do? Telephone the BBC

ask them

to play it again? Ah well, guess I shouldn't have dismantled the

video

recorder ;-)

73 Hans G0UPL

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Hello Ron

Congrats on the Dutch contest. 70 QSO's is a lot (for me, anyway!).

are interested in low power QRSS beacons, there is a mailing list

not be aware of. The QRSS Knights webpage is
and if you want to subscribe to

list, send an email to on5ex@p... . Most activity is in Europe but
there are also some experimenters in VK with regular reception

VK on 30m.

This weekend I looked at the monitor PCB some more and made a

of all the resistors and capacitors. You know, there are a huge

components there. But certain parts of a receiver require very

component values! That makes it a real challenge if one decides to

rig from ONLY parts in the monitor.

73 Hans G0UPL

-----Original Message-----
From: Ron [mailto:pa2rf@y...]
Sent: 14 February 2005 07:23
To: BITX20@...
Subject: [BITX20] Re: Recycling monitors




Hi there Hans,
Nice story about the tuning cap. Your vfo looks fine. If CW goes

drift should be less than 100 Hz or so. Congratulations.
My components for the huf&puf circuitry arrived but i did not touch
the soldering equipment this weekend. I decided to participate in

first HF contest the 50th Dutch PACC. This had nothing to do with

and homebrew equipment!. Made about 70 contacts with old Kenwood
transceiver from 1972 with tubes (plenty of pwr)...
The more I think of the beacon project, the more i like it.
How about a qrp 250mW TX on 18.0xy MHz calling CW using a PIC
generating the cw code...
Bye for now
ron

--- In BITX20@..., Hans Summers <Hans.Summers@t...>

Hello Ron

My VFO uses just a simple 74LS04 inverter, and it's surprisingly

stable even

at 10MHz, after some warm-up time. Perfectly adequate for a CW

The main

problem with it is that I did not gear the tuning knob, so the

tuning rate

is very fast! By the way, speaking of recycling - that tuning

capacitor came

out of a 1970's radio tuner which I dismantled. I found it at the

rubbish

dump a year ago. I had a car full of garden waste which I was

dumping there.

I saw this thing on the ground next to the door where you pour the

waste in.

The strangest thing happened! All by itself, it just jumped off

ground

and into the boot of my car!

All I know about the Tweenies and Teletubbies is that in both

cases, they

wear ridiculous suits in bright colours, have silly names, and

dance around

singing funny songs. My daughter is the expert ;-)

73 Hans G0UPL


-----Original Message-----
From: Ron [mailto:pa2rf@y...]
Sent: 11 February 2005 07:20
To: BITX20@...
Subject: [BITX20] Re: Recycling monitors




Good morning OM
Nice 30m rx Hans!
Similar to the dc rx i built, altough i used an old so41p (which

are

not produced anymore). And i have used to x-tals for the

instead of a free vfo. Ordered them from Funk Amateur a magazin

Germany. The complete trscvr is in an old CD-player housing now.

With

a nice Aluminium plate on the front, it looks brand-new (Where did
you buy that ...) Sometimes there is some broadcast breaktrough but
not often. I discovered that around 11 o-clock in the morning and 4
o-clock in

the

afternoon i get the best results. Stations seems to be around the
corner. I worked with 5 watt station from Poland which was

loud. If condx are there it is a great band.
During evening the band seems dead last couple of weeks. I think

PA is too short distance for 30m but we can try if you like. I

have 10,108 and 10,118 on cw available...OK, i asked my son about
Tweenies. He said they are similar to the Tubbies and further

refused

to talk about it :-((
He is into Yu-kiyo, Spongebob Squarepants and The Karate Kid these
days... bye
ron

--- In BITX20@..., Hans Summers <Hans.Summers@t...>

wrote:

Hi Ron

I like 30m too. One of my other projects is a miniature CW

transceiver for

30m. Nice job on the 30m rig, I hadn't seen that on your site

before, I

think it is newer than when I previously visited. I have a 30m

direct

conversion receiver see

<> but it suffers

from plenty

of broadcast breakthrough. Nevertheless I had some nice QSO's on

it

including my first Italian station. Perhaps when I am next able

get my

station QRV again on 30m we can try a QSO! PA might be a little

too

close

for 30m though, except under unusual band condx.

Hmm so you have teletubbies too. My daughter loves them. She's 2

on

1st

April. Only problem is, she gets very angry when the programme

finishes and

blames it on me. What does she want me to do? Telephone the BBC

and

ask them

to play it again? Ah well, guess I shouldn't have dismantled the

video

recorder ;-)

73 Hans G0UPL

> .

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ure/ji

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