Vintage Simmons Drums (UK) Users Group

Hi list,

I thought I should change the battery of my latest MTM today. But since 
I was stupid enough not to make notes or take pictures when last time 
doing this I dug out one of the other units to have a look.

No. 114 had it's battery changed by the former owner and as far as I 
remember I copied the work in my other MTM. Apart from the removal of 
the old battery and the insertion of a AA-sized Lithium dito I can only 
see one change: the lifting/removal of resistor 37. I did the same on my 
other MTM and both works well, both functions and memory.

Here's a shot of what can be seen inside no. 114.
http://www.electronic-obsession.se/studio/simmons/mtm_battery_mod.jpg

So techs, let me know if this is wrong. Should I lift diode 30 too? 
Anything else? The schematics aren't the best and I'm no master at 
reading it anyway. :)

Happy holidays,
-- 
electronically yours, jesper

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