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Old 10th Nov 2019, 9:06 pm   #1
Lloyd 1985
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Default Ekco AD38, basket case revival!

Thought it was about time I posted something on here! So whilst waiting for inspiration on the restoration of an Ekco A22 I thought Iíd have a quick look at this old AD38 that I got from the NVCF a few years back. Looking at it I did wonder whatever possessed me to buy the thing, for starters there is no back, the knobs are wrong, the dial is flaking, and the speaker is missing, and thatís just what was clearly visible! It does however have a full set of valves, and all the RF coils and their screening cans are in place.

Another problem is the dropper has started falling apart, the brass strips that wrap around and make up the terminals have gone brittle and broken, luckily the resistance wire itself is still ok! Iíve wrapped the wire back into place and stuck some tape on it for now just to secure it, now I need to find some suitable material to make new terminal strips from.

With the chassis out itís clear someoneís been here before, there are parts of the power circuit missing, most obvious is the smoothing block, which was a cardboard box type (C8 and C16), the air cores chokes L11 and L12 have also gone awol, and the scale lamp and itís carrier have also gone.

So why bother trying to restore this?!? Because I like a challenge! And after searching the net for info I could only find mention of 2 of these on here! So itís a bit rarer than the A22!

So before I do anything I wanted to see if I could get some results from it, even in itís well knackered state. I traced out the power circuit and got continuity through the valve heaters and the dropper, and connected it up to a home made inverter, which isnít very powerful! The valves lit up but that was about it, there was HT, about 120V of it, but nothing from the test speaker. A few voltage checks around the output valve found the cathode was sitting at near HT, R12 was open circuit, so a 100 ohm resistor was quickly tacked in and then there was noises from the speaker! More checks revealed the grid coupling cap was leaking badly too, so that was snipped and another tacked in, after a bit of fiddling I was able to tune in Talk sport and Absolute radio! Itís not very loud, but there are a lot of leaky old caps in there still.

So it looks like a viable project! Now I need to ask someone a favour, has anyone else got one of these sets? And if so do they have any clear photos of the speaker baffle board? Iím sure mine is totally wrong, as it doesnít hold the speaker cloth in properly! Also could someone provide some nice clear shots of the scale lamp carrier? Iíd like to make a new one for this set!

Regards
Lloyd
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Old 10th Nov 2019, 9:34 pm   #2
bluepilot
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Default Re: Ekco AD38, basket case revival!

We had one of these when I was a boy. Sadly I wrecked it completely. I sawed the cabinet in half and the rest ended up in my sandpit. I always said I would try to get another one. When one turned up I bought it but due to bad packing it arrived as a kit of parts It's out in the barn somewhere. I'll have a look in the morning and see if I can take some photos of the bits you're interested in.
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Old 10th Nov 2019, 10:14 pm   #3
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Default Re: Ekco AD38, basket case revival!

OK, well SWMBO was watching some rubbish on the TV so I went and took some photos. Didn't realise until afterwards that the flash wasn't working properly. I'll do them again if you need me to. Size about 20.5 x 29 cm
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Old 10th Nov 2019, 10:15 pm   #4
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Default Re: Ekco AD38, basket case revival!

And here's the lamp
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Old 10th Nov 2019, 10:31 pm   #5
Lloyd 1985
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Default Re: Ekco AD38, basket case revival!

Hi Stuart,

Sorry to hear about yours! Those photos are fantastic, many thanks! Hopefully I can recreate the parts!

Regards
Lloyd
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Old 10th Nov 2019, 11:28 pm   #6
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Default Re: Ekco AD38, basket case revival!

Hi Lloyd,

The AD38 is virtually identical to my [even rarer] Radio Rentals RR484 albeit that the case is somewhat different. The tuning scales on the RR484 are intended to be easily removable - so if you want a scan of mine and photos etc. of the back, just let me know.

Cheers,

Dave
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Old 11th Nov 2019, 9:22 am   #7
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P.S. Excuse the dust [patina?] - I restored this particular set thirty-odd years ago! It's definitely rare .... The Radio Museum have no pictures - and describe it as a superhet!

(If you need pics of the smoother block etc. I can probably heave some out. All the cap [cases] are original too .... cos' I re-stuffed 'em!)
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Old 11th Nov 2019, 12:18 pm   #8
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Default Re: Ekco AD38, basket case revival!

Very good Lloyd. I had to rewind one of those droppers a few years back, It had gone into "Slinky" mode. It's important to use High Melting Point Solder when terminating the wires on the brass rings.

Suitable brass is available from model engineering suppliers, but you'll have to cut it into strips. What thickness is it? I may have some suitable scrap pieces you could have.
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Old Yesterday, 11:11 am   #9
Lloyd 1985
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Default Re: Ekco AD38, basket case revival!

Hi Dave,

That is a nice radio, and certainly not one I’ve seen before, the chassis is identical, not sure why Radiomuseum calls it a superhet! Cheers for the photo’s!

Hi Graham,

Not sure what thickness it is, I’ll get the verniers on it, cheers for the offer of some bits of brass, I think I’ve got some tucked away!

Regards
Lloyd
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