Grundig, Simprop and Multiplex Conversions

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tiptipflyer
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Grundig, Simprop and Multiplex Conversions

Post by tiptipflyer »

It might be of interest for others, so I repost some of my conversions rom the last years maybe to give others some ideas and inspiration.
First is a Varioprop 10 in 35MHz.
Varioprop10a.JPG
Varioprop10d.JPG
followed ba a Varioprop 12 in black (2.4G) and yellow (35MHz).
varioprop12.JPG
Varioprop12gelb.JPG

Cheers
Frank
Last edited by tiptipflyer on 25 Feb 2018, 09:48, edited 1 time in total.
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tiptipflyer
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Re: Grundig, Simprop and Multiplex Conversions

Post by tiptipflyer »

Next is a Grundig TX 14, a very rare set converted to 35MHz.
TX14b.JPG
TX14e.JPG
Frank
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tiptipflyer
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Re: Grundig, Simprop and Multiplex Conversions

Post by tiptipflyer »

One of the first proportional radios on the German market was the Simprop Digi4.
Converted to both 2.4G and 35MHz choosable by just flicking the power switch in the proper direction.
Separate trim pots.
Digi4.jpg
Digi4b.JPG
Digi4d.JPG
Cheers
Frank
Last edited by tiptipflyer on 25 Feb 2018, 10:00, edited 1 time in total.
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tiptipflyer
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Re: Grundig, Simprop and Multiplex Conversions

Post by tiptipflyer »

Also very rare and one of the early proportional sets was the Multiplex Digitron, here converted to 35MHz.
It has separate trim pots, so I add a small picture how I solved this proplem on the easy way. It works great.
digitron7.JPG
digitron8.JPG
Trimpoti.jpg
Frank
Last edited by tiptipflyer on 25 Feb 2018, 09:58, edited 1 time in total.
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tiptipflyer
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Re: Grundig, Simprop and Multiplex Conversions

Post by tiptipflyer »

Varioprop 6 in 35MHz.
Varioprop6a.JPG
Varioprop6i.JPG
Frank
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tiptipflyer
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Re: Grundig, Simprop and Multiplex Conversions

Post by tiptipflyer »

A very rare set was the Minitron f3. My best friend at school used to have this one 45 years ago. He sadly past away a long time ago.
Minitron1.JPG
Minitron1d.JPG
Separate trim pots also.
Frank
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Wayne_H
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Re: Grundig, Simprop and Multiplex Conversions

Post by Wayne_H »

All very nice Frank ;)

I do have a soft spot for the European radios - the styling is so different to the American "utilitarian" box approach that many of us are used to 😀
Cheers,

Wayne
Once a Retrobate, always a Retrobate............ ;)
pikpak
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Re: Grundig, Simprop and Multiplex Conversions

Post by pikpak »

tiptipflyer wrote: 25 Feb 2018, 09:52A very rare set was the Minitron f3
Is the printed circuit board original? It could well be, because the manufacturers Schöning and Scheck had played around with it over and over again. Mine after remodeling:
Minitron_2G4_k.jpg

Remarkable about the transmitter is its small size, and - in contrast - the original antenna is quite long, longer than your Multiplex Digitron's one. (I'll have a look tomorrow ;-) Absolutely not handy! With this TX the rubber antenna pleases (me) really much better than the original asparagus ;-)

Mr. Scheck has passed away, but Mr. Schöning you can see the elderly gentleman with the cap sitting behind the fence: Image

Also here the second from the left: Image

LG
Patrick
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tiptipflyer
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Re: Grundig, Simprop and Multiplex Conversions

Post by tiptipflyer »

Hi Patrick,
the Veroboard is not original. I removed the original PCB and used this to have a platform for all the pots and the arduino. I still use the original long antenna on 35MHz to remind me of the good old times with my schoolmate Klaus-Dieter 45+ years ago.
Nice to see, that Mr. Schöning is still around, he would love to see, that some of his radios are still in use.

Frank
pikpak
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Re: Grundig, Simprop and Multiplex Conversions

Post by pikpak »

pikpak wrote: 17 Jul 2018, 23:06[..] the original antenna is quite long, longer than your Multiplex Digitron's one. I'll have a look tomorrow.
here:
Antennenlaenge_Minitron_k.jpg
(I know the wall is damaged...)

The Multiplex Digitron as handheld transmitter in use (well, that was only theater, even the corduroy hat ;-) Other things, too: http://www.rc-network.de/forum/showthre ... ost3787978

Patrick
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