My Paraset No 2
Is it possibly to build an exact copy of a Paraset today??
The No 10448 original Paraset
Photo from Alan Oatey M0AVN
This is an original Paraset No 10448 that Alan, M0AVN borrowed from a collector.
Component side. This must be an unused rig.
Original Case
Photo of a original case from Alan, M0AVN
Paper Paraset
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Testing the case parts with paper art....
New case
My new case
Joggling
First one small bending
Then one from the other side.... thats all.
My new panel
This is a waterjet cut panel made from 1mm stainless steel. In the original it was about 1.6mm nickel plated steel. All small holes are here just pierced and have to be drilled and countersinked. The secret to drill in stainless is to use low speed, 100 - 200 rpm push hard and use grease.
Drilled and countersum. The sandblasted surface will look like an old chassis.
Bending the edges with help of a big bending press.
Screenprinted panel. Unfortunately did I get Alan's photos until later so some holes are missing and some are in wrong position.
Tuning condenser
These are cheap ones purchased from a junk sale. They are useless wihout shafts...
With a 5.5mm short hole drilled in an 8mm brass rod turned down to 1/4" (6.3mm), and a little Loctite, we can use the condenser in a Paraset
If we want to use 3mm screws, use a tap...
36H Choke
The original 36H choke is hard to find today. I think the 36H and the Brown's headset are tuned together.
Its hard to find 36H chokes today. This have the right size but only 10H, I will try. With a little piece of Paxolin, little brass I will make a try to get a look-alike.
With little force the tabs are bent around...
Lot of swimm in Shellac...
Tuning lamps
The tuning lamps are made from modified scale lamp holders. Spacers are made of Paxolin.
Tuning lamps.
KEY
Photo of an original key. On backside you can see a solder tag mounted on the key. The big 0.1uF condenser are solded direct on the key' solder tag.
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Pictures from LA1KHA, Kjell Erikssen who has an original key. He helped me with the measurements.
By measuring different photos I made this key. The extra solder tag is showing here.
Drawing edited after help from LA1KHA, Kjell
COILS
From F6EJU
It is still possible to buy 38mm Paxolin rod in Sweden. Drilled out and wound with silk covered wire.
The receiver coil.
BOLTS
Bolts with rounded head are not made today. I need some for the key and tuning lamps. They are easy to make from woodscreews.
RESISTORS
To find power resistors in the right value is impossible today...
Modified resistors with right size and with help of coloured model enamel...
They will be look original...
VARIOUS
Original Bulgin head-phone jack socket and switch.
Tube sockets in original...
Little tool on a "poprivet"
The status today!
With new valve sockets
Mechanical ready.
Case ready 20090921
Box ready.... 22 sept 2009
Nuts
Original 6BA full nuts on this photo from Alan. M0AVN
6BA screws is about 2.8mm. I will use M3. And nobody makes "fullnuts" for M3 so I made them from 6mm hex brass rods.
Circuit diagram
by studying the fine photos from Alan hard, I found this is the circuit diagram for Paraset No 10448
Components layout
A likely hole layout after studying Alan's picture.
The probable components connections?
Main Power Supply
Original main power supply for Paraset. Picture from ON5LJ
Jean Claude have made drawings on the power supply on this link
First test in paper work to see if all parts fit.
Metal work ready
Main Power Supply ready...
Spotwelding
For making this chassies I needed a spotwelder...soo I made one. Read more (only in swedish)
12V Vibrator Power supply
Original power supply, Picture from Alan M0AVN
Paperwork first!
Then metal work...
Link to theorie of vibratorsystems. Another link
One more link to vibrator theorie 13mb
Download my drawings
You can download all my drawings in sPlan 7.0 here and a sPlan viewer here , now you can print all in scale 1:1 Right click and save. Or buy (€40) the program, sPlan 7.0 from ABACOM
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Now the hunting for old components starts...
More follows...
Links to others builders:
Henk van Zwam Paraset in Netherlands
VE7SL Paraset in Canada
SM7EQL Bengt Falkenberg
AE4IC Bob Kellogg
I0BR/Roberto, IK0MOZ/Mario, IK5FUZ/Alberto Paraset in Italy
Asbjørn Ursin Paraset in Norway
The Paraset Club only for members! and why??
France link and one more F6EJU France links