EQUIPMENT BACKGROUND
After years of use and then storage once the analog Teletext television system was turned off yonks ago, I have finally gotten around to placing this professional, very well built equipment onto the workshop bench ... the "operation" has begun
This equipment was fully functioning but of no possible further use in our digital television (with no teletext broadcasts) era so now I have extracted components and modules "of interest" which can be used to restore another EH-1000 or possibly suit use in other "dated" equipment - parts that you will probably never find anywhere else!
Now it's time to take out the scalpel and start the op!
One the of the first things to note is that although this is branded Unaohm and manufactured in Italy, the components inside have been substantially sourced from European and English component manufacturers, the likes of Siemens and Philips.
THE DONOR EQUIPMENT
UNAOHM - Teletext Video RF Analyser
Model: EH-1000
Designed & manufactured in Milano, ITALY
Circa Late 1980's (based on advertisements placed in Wireless World at the time and the date stamp on the AC transformer core)
Technology: Analog video broadcast signal analysis - specifically for examining lines of Teletext information "riding along" with the video signal
Luggable (heavy at 15kg) due to the heavy duty Aluminium outer case but more importantly, the inside welded steel frame chassis inside.
Well engineered inside, logically laid out using a number of modules which are well interconnected.
Designed for 220V 50Hz operation (because of this, we used this equipment via an AC variac many years ago)
Green emitting rectangular CRT based front panel display
Interested in the technical nitty gritty? Here is an old copy of the spec sheet
Enough information about the "patient" now to the component(s) I have removed
COLLET KNOB
No name or codes on these knobs but I have a very strong suspicion they are from SIFAM (UK)
Material: Flexi-plastic body (almost like a psuedo rubber) and Brass collet assembly
The knob has a slight angle from the top downwards, ribbed sides for easy grip
There are THREE DIFFERENT styles of knobs, the differences being at the "skirt" and not the overall dimensions. I have provided a selection list so that those interested can select the type of knob they may want to use. I have also indicated the original front panel position of the knobs on the EH-1000
Knob #1
Height overall (including the push to fit top cap) and spacer 19mm
Top diameter 9.2mm
Lower main body diameter 10.2mm
Lower skirt (with a White pointer line) 15.5mm
The lower skirt is FIXED to the main body i.e a one part knob
Brass two piece collet assembly with small Philips head bolt to tighten/loosen the collet (under the top cap)
The collet is to be used with a circular 4mm diameter shaft
Supplied with two Black plastic bushes which were used with the EH-1000 for the control shaft, probably of no use elsewhere.
EH-1000 Control knobs for FOCUS & INTENSITY
CLEAN
NO damage, pieces missing or even scratching - just a matt Black with the White pointer line
Knob #2
Height overall (including the push to fit top cap) and spacer 19mm
Top diameter 9.2mm
Lower main body diameter 10.2mm
Lower skirt (with a White pointer line) 15.5mm
The lower skirt is REMOVEABLE and is secured to the main body using three small pins - in effect you can have this knob with the skirt and White pointer or just a simple knob with no point or skirt.
Brass two piece collet assembly with small Philips head bolt to tighten/loosen the collet (under the top cap)
The collet is to be used with a circular 4mm diameter shaft
Supplied with a White plastic circular spacer which were used with the EH-1000 for some of the shorter control shafts (some shafts are only 5mm in length), probably of no use elsewhere.
EH-1000 Control knobs for X POSITION, Y POSITION & Y AMP display controls
CLEAN
NO damage, pieces missing or even scratching - just a matt Black with the White pointer line
Knob #3
Practically identical to Knob #2 except there is NO spacer supplied
Height overall (including the push to fit top cap) and spacer 19mm
Top diameter 9.2mm
Lower main body diameter 10.2mm
Lower skirt (with a White pointer line) 15.5mm
The lower skirt is REMOVEABLE and is secured to the main body using three small pins - in effect you can have this knob with the skirt and White pointer or just a simple knob with no point or skirt.
Brass two piece collet assembly with small Philips head bolt to tighten/loosen the collet (under the top cap)
The collet is to be used with a circular 4mm diameter shaft
NO spacer was used or will be supplied with this knob assembly.
EH-1000 Control knobs for DELAY uS & PHASE display controls which have longer than 5mm length control shafts.
CLEAN
NO damage, pieces missing or even scratching - just a matt Black with the White pointer line
ALL knobs are offered individually or if wanting a few of them, automatic discounts occur
