#14 Grundig Signal Tracer SV41 Repair and De-Noising

Beyond a small repair the most important topic is the de-noising of this signal tracer, which was - caused by the concept - very noisy.
Reason: High amplification in the wrong stages.

[@yannikpanic3233]

Thank you so much for this video!
I have the sv41, my father used while doing his "Radio & Fernsehtechniker" studies and we've used it recently while repairing an amplifier. Noticed the noise too. Ordered new vishay elcos and will replace the transistor too, with the added resistors. Basically I will repeat your video ;).

[@dl7majstefan753]

Please let me know your results. Thanks!

[@ryszard-j-k]

Thank you for interesting review and repair. SV41 is very good example of German electronics.I found one and I am going to restore and use it. Could you share the documentation, schematic and manual with me?

[@dl7majstefan753]

Yes! Please end me your email-address.

[@Justplast]

I love it I wona get one.

[@michaelumlauf494]

Hello Stefan,
great Video.
Regarding the wrong polarity from c115.
Can you explain why? I don't understand why.
All the best.

[@dl7majstefan753]

It is clearly explained from 19:00.

[@michaelumlauf494]

@@dl7majstefan753 Thank you for your kind advice. Now it's clear.

[@user-bv2wp5kw6e]

First time I see Grundig instrument like this , may be it is very rere and hard to find in the market now ,can any one suggest me where to find? Thanks in advance.

[@dl7majstefan753]

I got mine -and the other Grundig instruments - on a well known internet platform. Prices are in general high and their quality is sometimes poor and they need repair as you´ve seen. Search in the net for the instruments; e.g. "Grundig XYZ". Don´t pay too much!

[@user-bv2wp5kw6e]

@@dl7majstefan753 Thank you so much for your suggestion.