Lotus Elan

PHILIPS TURNOLOCK RADIO PANEL NUTS

PostPost by: gearbox » Thu Dec 08, 2016 1:56 am

I'm trying to figure out the size of the jam nuts for a Philips Turnolock radio for my Elan. I tried 3/8-32 and a 10mm-1.0 nuts with no luck. Does anyone know what thread size I need? Thanks Allan
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PostPost by: elanfan1 » Thu Dec 08, 2016 11:35 am

Looks a bit specialist size wise. I reckon your best bet would be to google vintage car radio repairs and then call them - unlikely to cost you much and less hassle than running around trying to find the correct size.
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PostPost by: gearbox » Thu Dec 08, 2016 5:41 pm

I pretty much exhausted the usual repair guys here in the states, all they want you to do is to send them the radio so they could go through it for a minimum charge of $100 and a restored charge of $300. None of them were willing to divulge any knowledge of what the thread size could be without actually looking at the radio which again would cost $100 plus shipping. But these panel jam nuts are readily available in both SAE and Metric here, just need to know the thread size. I'm hoping someone may have gone down this road before. Thanks Allan
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PostPost by: el-saturn » Thu Dec 08, 2016 6:28 pm

if you were close i could lend you all of my gauges (bsp, whitworth, unc, unf, metrical from 1/16 to 15mm!) - i could also mail em- but any proper mechanic should have them! i'd imagine they're metrical and looks like metr. fine m10: thread gradient 1,25, which you can measure (ca.< 1/16 inch) sandy
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PostPost by: mbell » Thu Dec 08, 2016 7:24 pm

You should be able to pick up some thread gauges pretty cheaply to see if it matches and of the standard threads. Or you could take it to your local specialist bolt/nut shop and ask if they can help with identification and supply of the nut.
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PostPost by: Paul Chapman » Fri Dec 09, 2016 9:17 am

Is it worth trying to contact Philips for any info. that they still hold ?

http://www.philips.co.uk/c-w/support-ho ... ories.html
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PostPost by: bob_rich » Sat Dec 10, 2016 1:13 pm

HI

I have a number of service manuals for early philips stuff and I may be able to help but I need to know the type number of the set. Turn lock covered a wide range of sets It may be along the lines of 11AB222. i.e 2 numbers then 2 letters and 3 numbers.

with this info I will see what I can find for you

hope this may help

Bob
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PostPost by: gearbox » Sun Dec 11, 2016 4:00 pm

Thanks Bob, this is what I have found.

20161211_105127.jpg and


20161211_105013.jpg and


20161211_105102.jpg and


As you can see, the paper tag is a bit worn, but hopefully you can match it up. Since the radio is made by Philips which I believe is a Dutch manufacturer, I assume it was made in metric. The closest I have been able to determine is that it is 10mm but the standard fine thread of 1.0 does not fit. Thanks again, Allan PS BTW what goes between the front of the radio body and the back of the wood dash? I assume it was a simple 1" x 2" plate with a drilled hole for the tuning stalk that would hold the radio on the back while the front facia squeezes it from the front. A picture would be great, Thanks.
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PostPost by: bob_rich » Sun Dec 11, 2016 8:20 pm

Hi again

I don't have a data sheet for any of the numbers on your label

I posted an enquiry on a vintage radio repair site in the UK. I tinker with old radios as well and got a reply that it could be a 3/8 - 32UNEF 2A. I posted the picture of your radio on the site showing the required nut and see if any other posts pop up. Philips is Dutch and has (had) a big presence in the UK and many of the volume control, switches and sockets did use some of the less well known Unified series threads.

If you get really stuck I could mail you a couple to try. As I say I have some but never did know what thread they were. So you enquiry is quite interesting ! !

regards

Bob
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PostPost by: gearbox » Sun Dec 11, 2016 9:40 pm

Hi Bob;

Thanks for helping. I did try the 3/8"-32 nuts as they are the more common rheostat panels nuts in the US and they would just thread about a 1/4 turn before you know it wasn't the correct threads. The 10mm -1.0 fine did the same thing. The threads are definitely a fine thread and appears to be a smaller pitch than the 32 and and just a bit bigger than the 36 pitch gauge, so this eliminated the sae threads. But the metric threads only show 1.0 as the finest thread and that is way too coarse. So I am at a loss. Any help would be greatly appreciated. Thanks Allan

20161211_162614.jpg and
32 pitch gauge
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PostPost by: bob_rich » Mon Dec 12, 2016 7:37 am

Hi again

There are quite a few comments on the Vintage radio website to my post so I have attached a link and you can follow it yourself. One posted that it is probably M10 by 0.75 . This would give 33.8 tpi if expressed as in imperial terms. So perhaps it is the metric after all as this is between the 32 and 36 which is what you suspect.

hope this helps I have learnt a lot looking into this !!

Bob

http://www.vintage-radio.net/forum/show ... to=newpost
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PostPost by: gearbox » Sat Dec 17, 2016 1:33 am

Ok, it is now official. I bought a 10mm - 0.75 tap and threaded a 14mm hex rod and made nut, and it fits perfectly. Reason I made them was that no one had them in the US that I could find. Even the tap was a challenge, but found one on Amazon of all places. Issue solved, so happy.
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