Yeah, I read that these transistors have known issues. This is why i initially thought it may have been this, so changed all of them on the pre-amp. Which diagrams show are connected to phono (if im correct).
The left channel does have some random crackling at times, But the right is fine. As it happens I do have quite a few compatible transistors, from a previous repair.
Quote:
Originally Posted by dave cox
Although ...
This does use use transistors KNOWN to sometimes go noisy / bad in the RIAA Eq stage. No problem if this is the case, it can be fixed for a few pennies 
I would think the 'phones output', with the volume turned down as low as it will go (on the walkman), should not overload the input. As already mentioned, the RIAA Eq will make it sound rather unusual, like you turned the treble to maximum and the bass to minimum. Having said that, some digital amplifiers (in the walkman) don't play nice if they don't have a low enough load impedance but the better brands work just fine ...
dc |