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Old 8th May 2009, 5:57 pm   #123
stonehopper
Retired Dormant Member
 
Join Date: Apr 2009
Location: St Albans
Posts: 50
Default Re: Roberts RT7 - problem

Quote:
Originally Posted by Station X View Post
That all looks OK apart from the last test. I'm surprised that you didn't get a reading on the 20mA range. 0.01 amps is 10mA, so I would have expected to see a reading on the 20mA range. I assume the set was turned on? Are the normal sockets the ones to be used on the 10mA range?

I guess the next thing to do is fit the output transistors. Then switch on whilst monitoring the current drawn from the battery. If OK check the voltages on the output transistors.
Yes - set was switched on, then off, then on again. This was with both plugs in the lower two sockets and the dial at 20mA range.
I switched off and then tried the bottom and top sockets with the dial at 10ADC range = 0.01

I'll run another check, and if I find anything changed I'll post again. If not, I'll put the AC128's in and see what happens.

Derek

PS Picture of meter in Post 93 Page 5.
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