Schaub Lorenz music centre 5005 - UK Vintage Radio Repair and Restoration Discussion Forum

Jimmyhaflinger · 12th Jun 2019, 3:14 pm

Hi

I just found my second schaub lorenz music center, this time it's a 5005, the console model, i got just the innards as the cabinet was rotten and smashed and the turntable was missing

The tuner works perfectly, the recorder instead was bodged and was missing its stabrelais, i fitted a NOS stabrelais i had but it still plays very quietly and has an extremely loud hiss, actually the hiss is louder than the music and the hiss is there even if i lift the head off the tape, could it be a bad transistor?

ricard · 12th Jun 2019, 5:18 pm

Out of curiosity, do these machines have capstan or rim drive?

Jimmyhaflinger · 12th Jun 2019, 8:41 pm

Quote:

Originally Posted by ricard

Out of curiosity, do these machines have capstan or rim drive?

Rim drive

andrewferguson · 12th Jun 2019, 9:09 pm

Ah, I just love the idea of these! The huge tape......

Would you by any chance be able to post a video of the tape player working? There are already some videos on YouTube, but yours is ideally suited to demonstrating the mechanism because it does not have a cabinet.

Jimmyhaflinger · 13th Jun 2019, 8:50 am

here's a video, as you can see it plays really quiet and with lots of hiss from the preamp

https://youtu.be/Jlvcsx76xeQ

Jimmyhaflinger · 14th Jun 2019, 8:34 am

Fixed! the AC161 transistor in the playback preamp's first stage tested fine on my component analyzer but had very little gain and lots of noise in practice

fitted a replacement transistor and plays fine now

Jimmyhaflinger · 29th Jun 2019, 3:34 pm

Now i have another problem: if i rewind at the beginning of the tape, the rewind motor starts too fast, jerks the tape violently and causes it to curl up in the reel, could the soft start NTC thermistor be shorted? Anyone knows its value?

By the way the new cabinet for it is nearly done

12th Jun 2019, 3:14 pm	#1
Jimmyhaflinger Heptode Join Date: Feb 2007 Location: La Spezia, Italy Posts: 834	Schaub Lorenz music centre 5005 Hi I just found my second schaub lorenz music center, this time it's a 5005, the console model, i got just the innards as the cabinet was rotten and smashed and the turntable was missing The tuner works perfectly, the recorder instead was bodged and was missing its stabrelais, i fitted a NOS stabrelais i had but it still plays very quietly and has an extremely loud hiss, actually the hiss is louder than the music and the hiss is there even if i lift the head off the tape, could it be a bad transistor? Attached Thumbnails

12th Jun 2019, 5:18 pm	#2
ricard Octode Join Date: Mar 2006 Location: Lund, Sweden Posts: 1,632	Re: Schaub Lorenz music centre 5005 Out of curiosity, do these machines have capstan or rim drive?

12th Jun 2019, 9:09 pm	#4
andrewferguson Hexode Join Date: Aug 2016 Location: Edinburgh, Scotland, UK. Posts: 262	Re: Schaub Lorenz music centre 5005 Ah, I just love the idea of these! The huge tape...... Would you by any chance be able to post a video of the tape player working? There are already some videos on YouTube, but yours is ideally suited to demonstrating the mechanism because it does not have a cabinet.

13th Jun 2019, 8:50 am	#5
Jimmyhaflinger Heptode Join Date: Feb 2007 Location: La Spezia, Italy Posts: 834	Re: Schaub Lorenz music centre 5005 here's a video, as you can see it plays really quiet and with lots of hiss from the preamp https://youtu.be/Jlvcsx76xeQ

14th Jun 2019, 8:34 am	#6
Jimmyhaflinger Heptode Join Date: Feb 2007 Location: La Spezia, Italy Posts: 834	Re: Schaub Lorenz music centre 5005 Fixed! the AC161 transistor in the playback preamp's first stage tested fine on my component analyzer but had very little gain and lots of noise in practice fitted a replacement transistor and plays fine now

29th Jun 2019, 3:34 pm	#7
Jimmyhaflinger Heptode Join Date: Feb 2007 Location: La Spezia, Italy Posts: 834	Re: Schaub Lorenz music centre 5005 Now i have another problem: if i rewind at the beginning of the tape, the rewind motor starts too fast, jerks the tape violently and causes it to curl up in the reel, could the soft start NTC thermistor be shorted? Anyone knows its value? By the way the new cabinet for it is nearly done