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Fixed price repairs are based on the assumption that unit/s received
 are ‘original & complete’... a surcharge may be applied to cover
missing  parts etc...  If in doubt send in the unit for inspection
‘Good  luck with your project’...  Enjoy your classic motoring...
 If  you  found this web site via a ‘search engine’ please
 check that you are looking @ the latest version... click here
Mileage correction
Clocks
Other services
Post & packing
Contact details
Speedos
Rev counters
Jaguar XK 120 ( 1948 / 54 )
182.2M
Parts Order E-Mail Link
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JDO Instruments
Classic Car Instrument Repairs ( Est 1963 )
 Fixed price repairs for most British & European Classic Car Instruments
48hr service  available... Why pay more & wait longer ! No UK vat
 Tele:   01535 603570 / Mobile: 07872 071512
Please check the  FAQ’s page  BEFORE ringing / texting / emailing

Rev-counter upgrades ( Smiths / UK Jaeger* )  Surcharge applies...
Early electronic rev-counters were designed for use with either a ‘Camshaft generator’  ( type RV )
or ‘Points based ignition systems’ ( type RVI )  If you intend fitting Electronic ignition ( including 123 etc )
most early Smiths / Jaeger Rev-counters ( including ‘cable driven units ) can be upgraded to work with Points OR
Electronic ignition whilst retaining the ‘RETRO-LOOK’ ie. once re-fitted only you will know of the upgrade !
The most popular upgrade is from Smiths type RVI v1 /  RVI v2  current loop system ( points ignition )
to RVC earth pulse system which will work with electronic ignition ( or points ignition if fitting electronic ignition later )
The second popular upgrade is from Smiths type RV ( camshaft generator ) E-type Mk1 / XK150 /  early Aston Martin etc  
 to either RVI v1 / RVI v2 if using points ignition or RVC for electronic ignition ( which will also work with points ignition )

Smiths type RVI v1 to RVI v2... reduces / eliminates  loss of calibration  ( common fault with RVI v1 ) units
Smiths type RN ( cable driven ) units can be upgraded to  to either RVI OR  RVC e.g. Triumph TR range / Early XK etc
Smiths RVC units can be re-calibrated to suit ‘wasted spark ( DIS ) ignition systems’ ( e.g. no distributor )
Upgrades to type RVC can be  NEGATIVE OR POSITIVE EARTH ( please confirm polarity required on your order )
Many other makes ie. VDO / AC / VEGLIA / American etc can be ‘upgraded’ but please ring 1st before sending
Please specify number of CYLINDERS / TYPE OF IGNITION & EARTH POLARITY with your order
( A connecting diagram will be included with all upgrades )         *UK Jaeger was made by Smiths
Up Triumph TR6 over Triumph Stag
Connecting diagrams