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  #41  
Old 16th April 2024, 10:06 AM
John Caswell John Caswell is offline
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Default Re: solder iron

I did write about this a long time ago, but I concur with Ali Stuart about thermal mass.
I have two Weller TCP2 48 watt irons for general use, one a 3mm bit, one a 1mm bit. Anything larger and either a Weller 60 Watt and/or a Henley Solon 125 Watt come into play. They generally sort the men from the boys
Copper PCB tracks are very good heatsinks especially if they are the plated through (PTH) type with a large mass of copper on the other side.
I consider a temperature controlled 50Watt to be the best so you get good fast heat transfer. Slow heat transfer is a disaster for PCB as it will lift tracks very quickly.
In my TV servicing days (1958) at the start of PCB construction we became very wary of "lifting tracks" and soon became pretty skilled and fast at component replacement.

John

Last edited by John Caswell; 16th April 2024 at 10:07 AM. Reason: Typo
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  #42  
Old 16th April 2024, 05:43 PM
bob orbell bob orbell is offline
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Join Date: Nov 2009
Location: kettering northants.
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Default Re: solder iron

Quote:
Originally Posted by Mark View Post
Bob,

Fair comment. Which make and model number do you have ?

Mark
Hi Mark, I have the 760 RWK, OK, I know it is expencive, but it works and the hot air gun is very uesfull for heat shrink tube, plus, if the iron burns out they supply a new element assy at a good price. I have had mine now for about 10 years and only last year did I need a replacment iron element.Bob
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  #43  
Old 25th May 2024, 02:08 PM
Mark Mark is offline
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Join Date: Feb 2007
Location: London
Posts: 153
Default Re: solder iron

Quote:
Originally Posted by John Caswell View Post
I did write about this a long time ago, but I concur with Ali Stuart about thermal mass.
I have two Weller TCP2 48 watt irons for general use, one a 3mm bit, one a 1mm bit. Anything larger and either a Weller 60 Watt and/or a Henley Solon 125 Watt come into play. They generally sort the men from the boys
Copper PCB tracks are very good heatsinks especially if they are the plated through (PTH) type with a large mass of copper on the other side.
I consider a temperature controlled 50Watt to be the best so you get good fast heat transfer. Slow heat transfer is a disaster for PCB as it will lift tracks very quickly.
In my TV servicing days (1958) at the start of PCB construction we became very wary of "lifting tracks" and soon became pretty skilled and fast at component replacement.

John
John,

Many thanks. My mate found a 125W Henley Solon and a 60W unnamed monster bit iron on that internet auction site and got the pair for £13.69 (see photos attached). The 60W one with the bent handle did the job. I had forgotten how long old school irons take to heat up - 5 to 15 minutes, and even worse to cool down, as I had forgotten to get a suitable rest !

Mark
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File Type: jpg Irons.jpg (42.5 KB, 15 views)
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  #44  
Old 26th June 2024, 07:08 PM
TimN TimN is offline
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Join Date: Sep 2021
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Default Re: solder iron

Quote:
Originally Posted by bob orbell View Post
Hi Mark, I have the 760 RWK, OK, I know it is expencive, but it works and the hot air gun is very uesfull for heat shrink tube, plus, if the iron burns out they supply a new element assy at a good price. I have had mine now for about 10 years and only last year did I need a replacment iron element.Bob
I bought one of these on Bob's recommendation after I saw one on Amazon as "used like new" for less than a ton. Got to say I'm very happy so far and the hot air gun comes in very handy (for heat shrink). All it had was slight damage to the lid of the box which had never been opened. Everything inside was still brand new and wrapped.

Just had a look and they have this if anybody is interested.

https://www.amazon.co.uk/gp/product/...7377F756P&th=1
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