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 420G Clock

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jag420g
Resident Mk10\420G Guru
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Posts : 443
Join date : 2010-01-19
Age : 60
Location : Melbourne, Australia

PostSubject: 420G Clock   Sun Apr 11, 2010 5:20 pm

Hi All,
A few days ago I reported to another forum that I purchased a replacement battery from SNG barrats for my car clock. I received an alkaline cell LR50 with an output of 1.5 volts. Upon insertion I realised that my clock went into overdrive and no amount of adjustment would slow it down, it was gaining 2-3 hours daily and became supercharged. Most distressing.
I then asked why this was so.--Apparently the 420G smiths clock relies on a constant 1.35 volt power supply and all these alkaline batteries which replaced the old mercury cells output 1.5 volts variable hence giving this irregularity.
I became very frustrated because some of the solutions involved surgical intervention of the clock and its umbilical, anyhow thanks to fellow Listers who showed me that I was not the only one who would love all their instruments functioning correctly I went out on a quest to find a constant 1.35 volt charge for our clocks and after much frustration and despair this is what I discovered in the UK
[You must be registered and logged in to see this link.]

I took delivery of this adapter and small silver oxide button cell a few days ago and eagerly inserted same into my clocks battery holder, I knew immediately Things were fine, the ticking had slowed down.
The clock is now functioning correctly and has been keeping perfect time ever since. What a relief!
This gentlemen is the perfect solution for powering up your presumably working clock, the adapter which ensures that the clock is getting a CONSTANT and I repeat a CONSTANT 1.35 volt charge is a once off purchase and the 1.35 volt small button cell is only cheap at a couple of dollars (I bought two), well worth it just to see the hands move.
Anyhow I do not know yet how long the small cell will last but for the price I am quite happy to replace it every few months or so, I hope to be surprised at it's longevity.

However in the meantime I feel that the power problem for the 420/420G battery powered clock has been solved.

Best Regards to all
Charles
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PostSubject: Re: 420G Clock   Fri Aug 20, 2010 10:47 pm

Strange , my clock dosn't run off a battery but works perfectly , my car is a 69/70

Alan S.S.O.C
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jag420g
Resident Mk10\420G Guru
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Posts : 443
Join date : 2010-01-19
Age : 60
Location : Melbourne, Australia

PostSubject: Re: 420G Clock   Sat Aug 21, 2010 12:15 am

Alan,
Yes, you are correct. in late 69-70 jaguar dispensed with the battery operated clock and dealerships were given the task of retrofitting it to direct power as yours must be. lucky fellow,
for having one of the late ones.

Best regards
Charles
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PostSubject: Re: 420G Clock   Mon Aug 23, 2010 12:11 am

jag420g wrote:
Alan,
Yes, you are correct. in late 69-70 jaguar dispensed with the battery operated clock and dealerships were given the task of retrofitting it to direct power as yours must be. lucky fellow,
for having one of the late ones.

Best regards
Charles


How strange , when they changed over to the 420g you would have thought that they all would have been direct power , i can remember looking for the battery holder as shown in the manual before finding the hidden wires , but had no idea this was for 69/70 models only .

Cheers Alan S.S.O.C
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