[sdiy] 1N4148 as replacements for Germaniumdiodes

[Nicholas Keller]

Please allow this 606-related question while it's somewhat on-topic: 

Recently I have noticed that when turning on my 606 and immediately raising the volume to a suitable level, the device does not power on.  I have to lower the volume back to the lowest point (just above the switch) in order for it to start working (LEDs illuminate/flash).  

Is this likely just a bad switched pot, or is there something else at play here?  I can't tell by the service manual how the switched pot controls the power. 

Thanks for any suggestions!

NK


> On May 19, 2016, at 8:09 AM, Florian Anwander <fanwander at mnet-online.de> wrote:
> 
> Hello,
> 
> a buddy of mine has a TR-606, which appearently has some shortcut diodes in the matrices arount the step programming and instrument selector. Originally Roland uses germanium diodes 1S188FM. 1N270 or NTE110A are recommended as replacement. If I look at the corresponding datasheets, I don't see anything that would speak agains 1N4148.
> 
> Do you think one could use simply 1N4148 as replacement? Or am I blind and overlook something completely important?
> 
> 
> Florian
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