How to make a stereo indicator for my Grundig 3397 and decoder IV ? - Page 2 - UK Vintage Radio Repair and Restoration Discussion Forum

KeithsTV · 22nd Dec 2008, 8:52 pm

The 220uF caps would be better. In view of your previous experience get the seller to try one out before you buy them

Have a good Christmas and let us all know how you get on with the indicator.

Keith

georgesgiralt · 29th Dec 2008, 7:07 pm

Hello !
You know what ? With good components, it works ;-)
I've wired the version with 100µF capacitors. And the 24V 30mA bulb. It's nice ! The bulb wire gets light red. So not so bright but enough to be seen. It has a smooth transition from off to lighted. so it serve also as a fine tuning indicator !
(there is a slight discrepancy between the EM87 and the stereo indicator. If the EM87 is at the strongest signal, the stereo indicator is not as bright as it could be. you've to alter the tuning a little to light the stereo indicator as bright as it would go. This was known because the shuffle was showing this to the ears, not to the eyes ...)
Thanks a lot to all of you !
And enjoy these ending year festivities !

KeithsTV · 29th Dec 2008, 8:38 pm

Hi George

That's excellent news. You don't want an excessively bright indicator but if it's not bright enough you could change to the 220u caps to give a little extra brightness.

Keith

22nd Dec 2008, 8:52 pm	#21
KeithsTV Nonode Join Date: Aug 2007 Location: South Bradford, West Yorkshire, UK. Posts: 2,574	Re: How to make a stereo indicator for my Grundig 3397 and decoder IV ? The 220uF caps would be better. In view of your previous experience get the seller to try one out before you buy them Have a good Christmas and let us all know how you get on with the indicator. Keith

29th Dec 2008, 7:07 pm	#22
georgesgiralt Hexode Join Date: Jul 2008 Location: Toulouse, France Posts: 406	Re: How to make a stereo indicator for my Grundig 3397 and decoder IV ? Hello ! You know what ? With good components, it works ;-) I've wired the version with 100µF capacitors. And the 24V 30mA bulb. It's nice ! The bulb wire gets light red. So not so bright but enough to be seen. It has a smooth transition from off to lighted. so it serve also as a fine tuning indicator ! (there is a slight discrepancy between the EM87 and the stereo indicator. If the EM87 is at the strongest signal, the stereo indicator is not as bright as it could be. you've to alter the tuning a little to light the stereo indicator as bright as it would go. This was known because the shuffle was showing this to the ears, not to the eyes ...) Thanks a lot to all of you ! And enjoy these ending year festivities !

29th Dec 2008, 8:38 pm	#23
KeithsTV Nonode Join Date: Aug 2007 Location: South Bradford, West Yorkshire, UK. Posts: 2,574	Re: How to make a stereo indicator for my Grundig 3397 and decoder IV ? Hi George That's excellent news. You don't want an excessively bright indicator but if it's not bright enough you could change to the 220u caps to give a little extra brightness. Keith