Re: Tek 2215

 

Not forgetting the Vertical amp in the 7904 which has two *very* marginally
specified 1W resistors snugged right up the to the PCB, and which are almost
always out of specification.

Dave

-----Original Message-----
From: TekScopes@... [mailto:TekScopes@...]
Sent: 26 January 2016 12:41
To: TekScopes@...
Subject: RE: [TekScopes] Tek 2215

Maybe mounting such resistors directly to the board was part of the
new low-cost process Tektronix was using for the 2213/2215 scopes? All
of the boards apart from the preregulator add-on board
were
made from a single panel which was snapped apart after soldering and
all of the components had
their
leads clenched to hold them into the boards during the wave soldering
process.

Nope - the 7000 series is exactly the same. Main culprits are the x
amplifier in most, and HT resistor stack on the 7704A (Tek changed the
design of that many times - earlier versions carbonised the PCB).

Craig

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