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Old 21st Apr 2024, 5:52 pm   #1
Julesomega
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Default Unidentified portable radio with IF module

I'm interested to identify this chassis, and to find out about the IF module which doesn't seem to be from Mullard.

The obvious place to start would be Radiomuseum.org, searching for 'modules' but that only finds the usual Mullard units, so I searched for the devices. The only ones easy to read are AC187K and AC188K, but oddly these are not to be found on the museum, so I guess this radio is not yet on there.

I'm sure someone will recognise the model
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Old 21st Apr 2024, 5:59 pm   #2
paulsherwin
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Default Re: Unidentified portable radio with IF module

The PCB has a vaguely Germanic look to it.
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Old 21st Apr 2024, 6:08 pm   #3
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Default Re: Unidentified portable radio with IF module

By Jove it does! The output transistors are Seimens, as are some electolytics. I've realised that the twin-gang tuning capacitor was fitted by me - must have been some kind of test bed.
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Old 21st Apr 2024, 6:08 pm   #4
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Default Re: Unidentified portable radio with IF module

Hi

For some reason I thought Grundig, being a major manufacturer that wouldn't buy in anything from arch-rival Philips.

See this old thread on the Elite Boy 600: https://www.vintage-radio.net/forum/...ad.php?t=50538

The Elire boy PCB photos in that thread show the same KPL-079.01 number etched on the PCB
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Old 21st Apr 2024, 6:36 pm   #5
dazzlevision
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Default Re: Unidentified portable radio with IF module

The circuit board with the standard Grundig part numbering system on it and a capital "G", makes me pretty sure it was made by Grundig. The sectionalised clear plastic former on the ferrite rod winding is also very Grundig.
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Old 21st Apr 2024, 6:40 pm   #6
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Default Re: Unidentified portable radio with IF module

Yes, that's quite similar. Mine's got even more tuned transformers in the module, 12 as against 7. The PCB marking must denote a production facility or drawing office; probably the number 19310-083.01 G is specific to the model.

The volume control is a slider on the top, just visible at the left on my image 2. The full complement of devices I now see is AC187K, AC188K, BC309A, BF241 (2-off), BC238A (2-off). Looks like I removed the MW coil from the ferrite loop.
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Old 21st Apr 2024, 6:55 pm   #7
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Default Re: Unidentified portable radio with IF module

See post#1 of this thread, which shows the IF box on my Grundig Elite-Boy 500. It has exactly the same appearance - even down to the paxolin tab from the pcb inside protruding through the can. Quite possible that the same module was used on the 600.

PS those cans are a right sod to get off!



https://www.vintage-radio.net/forum/...d.php?t=161590
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Old 21st Apr 2024, 6:55 pm   #8
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Default Re: Unidentified portable radio with IF module

Quote:
Originally Posted by Julesomega View Post
The PCB marking must denote a production facility or drawing office; probably the number 19310-083.01 G is specific to the model.
I think it will either be the part number of the unpopulated PCB or just the etch pattern.
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Old 21st Apr 2024, 7:23 pm   #9
Julesomega
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Default Re: Unidentified portable radio with IF module

With my substituted tuning cap out of the way, it's obvious this receiver began life as an AM/FM set. I now see the DC connector was fitted by me so I cannot even assume it was a portable. Shall I start the thread again?

The two Elite Boys have either a die-cast of a pressed steel Hopt tuner, and both look like they might be triple gang for AM, so clearly a very nice receiver. I've found what could be the missing candidate in my Hopt collection.

@DV, look again! The two PCBs are completely different.
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Old 22nd Apr 2024, 2:27 pm   #10
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Default Re: Unidentified portable radio with IF module

My full apologies to dazzlevision, I've just realised there were two linked threads about the Grundigs, the relevant one being about 'Desoldering large IF box screens'

Thanks to all, I can now safely identify my chassis as being from an Elite-Boy 500. Anyone fancy uploading the 500 and the 600 and the devices on Radiomuseum?
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Old 22nd Apr 2024, 3:53 pm   #11
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Default Re: Unidentified portable radio with IF module

I found a service manual for the Elite-Boy 500 (mainly in German) on the Electrotanya site (I think). Let me know if you can't find it, and I'll post my copy. I'm not sure whether it's available on Paul Stenning's service-sheet site. These are very good radios, and worth perservering with

Mike

PS - it's quite possible that the chassis's of the 500 and 600 look identical, and that the only differences are in the case-cosmetics. I also have a 600, but I've never had to go inside it.

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Old 22nd Apr 2024, 5:22 pm   #12
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Default Re: Unidentified portable radio with IF module

Quote:
Originally Posted by Julesomega View Post
My full apologies to dazzlevision, I've just realised there were two linked threads about the Grundigs, the relevant one being about 'Desoldering large IF box screens'
No worries!
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Old 23rd Apr 2024, 11:14 pm   #13
Julesomega
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Default Re: Unidentified portable radio with IF module

The manuals for both Elite Boy models are available for purchase on the service data pages, and the PCBs look quite different, but as I don't have any more than the PCB shown above I shan't be restoring anything. On the other hand, if anyone needs a chassis to go in their case they'd be most welcome
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Old 24th Apr 2024, 12:54 am   #14
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Default Re: Unidentified portable radio with IF module

Hi Julian
I have both an Elite-Boy 500 and 600, so that chassis may be useful - the chassis of the 500 is a bit battered, with bits of the plastic fittings broken off, and a dodgy volume pot. So, I'd be pleased to give it a home and a useful future (whether it's a 500 or 600) if you're happy to let it go, and unless someone else has a more pressing need.
Mike
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Old 26th Apr 2024, 12:37 am   #15
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Default Re: Unidentified portable radio with IF module

It's yours Mike! - I'll post it off shortly
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Old 26th Apr 2024, 1:02 am   #16
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Default Re: Unidentified portable radio with IF module

Thanks Julian. Have PM'd you.
Mike
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