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Author Topic: Conrad Retro Radio Kits  (Read 1389 times)
OTTAVIO
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Posts: 33




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« on: July 29, 2014, 04:26:09 AM »

I was googling for a local (West Europe) reseller or producer of receiver kits and I stumbled on Conrad, a German based kind of equivalent of Radio Shack. They offer three ultra-cheap regenerative receivers, all in a kit and with a stylish retro case.

The reviews seem enthusiastic on their own website, why shouldn't they? I see a review on Eham:
http://www.eham.net/reviews/detail/8197

but the picture doesn't match the ones on the website.

The cheapest kit is a transistor 3.5-9 Mhz regen receiver for only 10 euros. Then a similar receiver for €20 branded "Franzis Verlag 4660", then top of the range is a 3.5-12 Mhz valve tube receiver for €25.

I am really tempted by the valve tube one.

I hope somebody has a direct experience to share.
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KA4POL
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Posts: 1967




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« Reply #1 on: July 29, 2014, 08:52:46 AM »

A friend of mine got a tube radio kit. He was not happy with it. The AF was plain much to weak. Yes, it is a battery powered unit but they use the LM386 as audio amp. You can download the manual including the schematic.
On the other hand you don't burn much money.
You might take http://www.vcomp.co.uk/radiokits/radiokit.htm into consideration.
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KA4POL
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Posts: 1967




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« Reply #2 on: July 29, 2014, 09:07:48 AM »

You may search for 0V3 MINIATUR RÖHREN AUDION BAUSATZ EMPFÄNGER RADIO and you'll find a similar priced kit that looks more trustworthy.
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KK4MRN
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Posts: 90




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« Reply #3 on: July 30, 2014, 08:57:47 AM »

I found the radio kit on ebay.de German web site, but I do not speak German unfortunately.  Anyone?

I would enjoy building a radio kit that uses tubes.  My main issue is what would be needed to power these tubes?   Plus, I am scared of high voltage.

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OTTAVIO
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Posts: 33




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« Reply #4 on: July 30, 2014, 09:29:16 AM »

I found the radio kit on ebay.de German web site, but I do not speak German unfortunately.  Anyone?

I would enjoy building a radio kit that uses tubes.  My main issue is what would be needed to power these tubes?   Plus, I am scared of high voltage.


Which one have you found? For some of the Conrad radios there's also a manual in English. This is for the tube powered:
http://www.produktinfo.conrad.com/datenblaetter/175000-199999/192231-an-01-en-CONRAD_RETRO_ROEHRENRADIO.pdf

The one for the transistor radio:
http://www.produktinfo.conrad.com/datenblaetter/175000-199999/192214-an-01-ml-Kurzwellen_Retroradio_de_en_fr_nl.pdf

To power the tube retro radio you need a 9V battery plus 4 AA batteries.
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KA4POL
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Posts: 1967




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« Reply #5 on: July 30, 2014, 10:41:42 AM »

I found the radio kit on ebay.de German web site, but I do not speak German unfortunately.  Anyone?

I would enjoy building a radio kit that uses tubes.  My main issue is what would be needed to power these tubes?   Plus, I am scared of high voltage.
No need to be scared. Those tubes are battery powered and run a voltage between 45 and 65 V (just six 9 V batteries in series). The heating is 1.2 V.

Let Google translate for you. It's not perfect but sufficient for understanding.

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OTTAVIO
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Posts: 33




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« Reply #6 on: July 30, 2014, 10:44:29 AM »

The question is now: would the tube radio offer a better reception or sound quality?
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KA4POL
Member

Posts: 1967




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« Reply #7 on: July 30, 2014, 10:54:54 AM »

What would you compare it to?
Building tube radios these days is rather some nostalgic fun.
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OTTAVIO
Member

Posts: 33




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« Reply #8 on: July 30, 2014, 10:56:20 AM »

What would you compare it to?
I'd compare it to the other Conrad transistor radio. I wonder if the tube is necessary or it's just there to give a retro look.
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KA4POL
Member

Posts: 1967




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« Reply #9 on: July 30, 2014, 11:11:57 AM »

As I mentioned the audio signal is a bit weak on the Conrad circuit. Of course these days you find complete radios in just one IC like http://www.brighthubengineering.com/diy-electronics-devices/116645-making-a-radio-within-minutes-using-ic-zn415/

You still could put this in a suitable vintage box.
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