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Old 5th Apr 2011, 5:38 pm   #49
mhennessy
Dekatron
 
Join Date: Jul 2007
Location: Evesham, Worcestershire, UK.
Posts: 4,241
Default Re: Hacker Speaker Survey

Hi Tony,

Many thanks for the information. According to the RP25 service manual, the silicon transistors came in around serial number 13001, so that fits. The speaker change happened slightly afterwards; I know of another set with the silicon tuner and bolted speaker - serial number 15301, so everything sounds in order.

Just out of interest, a minor detail of the scale changed sometime around here. Looking at the 3 wide slots through which you observe the pointer, the earlier sets had a white outline around them, whereas the later sets only had a white line at the top of the opening. Which does yours have? (If my description isn't clear, I could post a photo tomorrow.)

Mark
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