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J D O Instrument Engrs
Classic Car Instrument Repairs ( Est 1963 )
Tele: (UK)  01535 672125    Mobile / SMS:  07831 886545
Fixed price repairs for most British & European Classic Instruments
48 hr service  available... Why pay more & wait longer ! no vat
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Good  luck with your project’...  Enjoy your classic motoring...
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
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press F11 again to revert to normal view  contact the webmaster
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Jaguar XK 120 ( 1948 / 54 )
508.1M
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Payment options
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Rev-counter upgrades ( Smiths / UK Jaeger*only )  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 can be upgraded to work with  Electronic ignition
Whilst retaining the ‘RETRO-LOOK’ i.e. 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 if fitting electronic ignition later )

The second popular upgrade is from Smiths type RV ( camshaft generator ) E-type series1 etc  to
either RVI v1 / RVI v2 if using points ignition or RVC for electronic ignition ( will also work with points ignition )

Smiths type RVI v1 to RVI v2... reduces / eliminates  loss of calibration / over-reading when hot !

Smiths type RN (cable driven) units can be upgraded to  RVC ( clockwise direction only ) eg. Triumph TR range

Smiths RVC units can be re-calibrated to suit ‘wasted spark ( DIS ) ignition systems’ ( e.g. no distributor )

Note: all upgrades to type RVC are for NEGATIVE EARTH systems only ( i.e. NEGATIVE  pulse )
( A connecting diagram will be included with all upgrades )         *UK Jaeger was made by Smiths
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Up Triumph TR6 over Triumph Stag
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Upgrade surcharge rates
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