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Author: Subject: Radio cutting out in old car
Lightning

posted on 21/5/17 at 07:32 PM Reply With Quote
Radio cutting out in old car

I know that some clever person on here can help me
After selling the Spire i have been rebuilding an old Alvis after 30 years off the road. Its now finished except for a couple of small teething problems.
It is -ve earth with dynamo. I have fitted a Caliber radio/mp3 thingy. It works all tickerdy boo when engine not running but when she fires into life there is both clicking and momentary cutting out. The clicking presumably is because there are no surpressors yet.but why is it cutting out?.This is only momentarily then on then off.
Any ideas?

[Edited on 21/5/17 by Lightning]





Steve

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gremlin1234

posted on 21/5/17 at 07:52 PM Reply With Quote
if it is off while the starter motor is running then its probably designed to do that. (the acc position on the key-switch is often wired like that)
else it could be the drop of the battery voltage causes issues.

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ReMan

posted on 21/5/17 at 08:09 PM Reply With Quote
Much clicking in a dynamo, presume with a separate regulator box. I wonder if the "electrical noise" is too much for the sedative electronics and its going into some sort of protection mode?
I's suggest some suppressers first and see if you can improve it. Possibly even a big capacitor close to the radio too





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Lightning

posted on 21/5/17 at 08:18 PM Reply With Quote
Reman

That was on the lines that I was thinking. Now to sort out surpressors..

Its after the thing is running BTW





Steve

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ReMan

posted on 21/5/17 at 08:21 PM Reply With Quote
Yes:- without it running radio is off a battery so nice clean 12v, its the charging kicking in i recon





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r1_pete

posted on 21/5/17 at 08:37 PM Reply With Quote
Have you thought about fitting one of those alternators disguised as a dynamo?

Those electro mechanical regulators constantly switch and arc, you can leave it in place but inactive to preserve authenricity.

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ReMan

posted on 21/5/17 at 08:40 PM Reply With Quote
quote:
Originally posted by r1_pete
Have you thought about fitting one of those alternators disguised as a dynamo?

Those electro mechanical regulators constantly switch and arc, you can leave it in place but inactive to preserve authenricity.


Otherwise you can get a electronic regulator replacement.

Be nice to narrow the issue down with a bit of playing first though





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Lightning

posted on 21/5/17 at 09:27 PM Reply With Quote
Have you seen the prices of alternator/dynamo lookalikes?





Steve

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ReMan

posted on 21/5/17 at 09:57 PM Reply With Quote
Shizzle!

When do we get a pic of the alvis?






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r1_pete

posted on 21/5/17 at 10:17 PM Reply With Quote
quote:
Originally posted by ReMan
Shizzle!

When do we get a pic of the alvis?



Good point, no pics not real

As ReMan says the electronic reg might be a better bet, but, an alternator provides more current, so better charge.

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02GF74

posted on 22/5/17 at 06:44 AM Reply With Quote
interference could be conducted over the wires or radiated, for wire borne interference an in line choke or capacitor may reduce and/or fix it. radiated would require screening of dynamo and/or cables, less easy. a simple fix would be to relocate aerial as far from the source as possible, i.e. stick it at the rear of the car.

were the original cars fitted with radios, if yes, then there is hope a radio (not necessarily the one you fitted) may work.

alternative is to record radio programmes and play back using cassette or mp3 player. I have a couple of John Peel show episodes recoded that are now quite precious as there will never be any new ones only drawback is that the news will not be current.

i'm sure you've googled but this and others like it may be of use.
https://www.howacarworks.com/accessories/identifying-and-suppressing-radio-interference


[Edited on 22/5/17 by 02GF74]






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Lightning

posted on 22/5/17 at 07:54 PM Reply With Quote
Tried to upload some photos
But when uploading to locostbuilders gallery it says files should be alphanumeric . the file name is alvista21dhc. Whats wrong with that?





Steve

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Lightning

posted on 23/5/17 at 02:52 PM Reply With Quote






Steve

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Lightning

posted on 23/5/17 at 02:56 PM Reply With Quote






Steve

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Lightning

posted on 23/5/17 at 03:02 PM Reply With Quote






Steve

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r1_pete

posted on 23/5/17 at 04:07 PM Reply With Quote
Very nice...
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perksy

posted on 23/5/17 at 08:45 PM Reply With Quote
That's just lovely


Anymore info on the car please ?

[Edited on 23/5/17 by perksy]

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ReMan

posted on 23/5/17 at 09:30 PM Reply With Quote
fantastic!

How bad or good, was it before you started it?





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Lightning

posted on 24/5/17 at 06:11 AM Reply With Quote






Steve

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ReMan

posted on 24/5/17 at 06:25 AM Reply With Quote
I'm impressesed! Did the big bits come with it, wings bumpers etc?
I know who to come to now when I need some help with mine!
Wow!





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