[GreenKeys] M33 SMD Boards...

[Kenneth Gartland]

Hi all!

Resistor heating and circuit board charring is commonly
encountered on these SMD boards...

Teletype Corp'n was well aware of this problem, and later
versions of these boards had the resistors (The affected ones),
raised above the circuit board to allow a little airflow underneath...

When I was shop repairing these older boards, I would
always raise the resistors above surface...

They do run quite hot, and I recall seeing some of the very
early production boards with little strips of insulating
material underneath the resistor bodies...

I still think best bet is to raise the height of the affected
resistors, likely you will have to physically replace them
as the leads will now be too short!

Cheers!

Ken
VE3-HMQ
i-Telex 61663
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