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This is telling me as you work on it, the radio is akin to bad soldering - when USB and LSB start to line up low or high - near their limits - the alignment originally done and where you have to set it now will be different.

Each joint you reheat - understand that the resistor or capacitor or any part used, uses a tinned - or supposed to be tinned - lead with solder - but they don't tell you the type of solder they used to tin it - lead or silver or antimony alloy - so some solder reheating and rework is needed to re-tin the leads to accept the new "different alloy" solder. Else the joint will work as a highly resistive one until the wetting is good enough to make the joint look like a soldered joint as the proper connections

Since you're in a RF/IF area - this will be a problem for any type of soldering system, affects Discrete and SMD as well.

<blockquote data-quote="Handy Andy" data-source="post: 783275" data-attributes="member: 52309">This is telling me as you work on it, the radio is akin to bad soldering - when USB and LSB start to line up low or high - near their limits - the alignment originally done and where you have to set it now will be different. Each joint you reheat - understand that the resistor or capacitor or any part used, uses a tinned - or supposed to be tinned - lead with solder - but they don&#039;t tell you the type of solder they used to tin it - lead or silver or antimony alloy - so some solder reheating and rework is needed to re-tin the leads to accept the new &quot;different alloy&quot; solder. Else the joint will work as a highly resistive one until the wetting is good enough to make the joint look like a soldered joint as the proper connections Since you&#039;re in a RF/IF area - this will be a problem for any type of soldering system, affects Discrete and SMD as well.</blockquote>

[QUOTE="Handy Andy, post: 783275, member: 52309"] This is telling me as you work on it, the radio is akin to bad soldering - when USB and LSB start to line up low or high - near their limits - the alignment originally done and where you have to set it now will be different. Each joint you reheat - understand that the resistor or capacitor or any part used, uses a tinned - or supposed to be tinned - lead with solder - but they don't tell you the type of solder they used to tin it - lead or silver or antimony alloy - so some solder reheating and rework is needed to re-tin the leads to accept the new "different alloy" solder. Else the joint will work as a highly resistive one until the wetting is good enough to make the joint look like a soldered joint as the proper connections Since you're in a RF/IF area - this will be a problem for any type of soldering system, affects Discrete and SMD as well. [/QUOTE]

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