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Components and Circuits For discussions about component types, alternatives and availability, circuit configurations and modifications etc. Discussions here should be of a general nature and not about specific sets. |
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18th Feb 2020, 2:58 pm | #1 |
Octode
Join Date: Feb 2018
Location: Southampton, Hampshire, UK.
Posts: 1,051
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Question relating to resistor mounting in an AM radio circuit
While building an AM radio, is there any disadvantage if the resistors are not mounted vertically ? Some older sources seem to favour vertical mounting, but is there a scientific reason behind this, apart from possible space saving on the PCB ? Can someone please advise.
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18th Feb 2020, 10:55 pm | #2 |
Dekatron
Join Date: May 2010
Location: Greater Manchester, UK.
Posts: 18,676
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Re: Question relating to resistor mounting in an AM radio circuit
I's always good practice to keep track and lead length as short as practical, but at MW/LW frequencies a change in component orientation is unlikely to have any ill-effects, and even if it does, they will end up nullified during alignment.
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-- Graham. G3ZVT |
19th Feb 2020, 12:29 am | #3 |
Nonode
Join Date: Oct 2010
Location: Tintinara, South Australia, Australia
Posts: 2,324
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Re: Question relating to resistor mounting in an AM radio circuit
As Graham says, at MW/LW it will make no practical difference whether they are vertical or horizontal.
It will either be space considerations or designer bias as to how they are set out. One thing I have done at times is use vertically mounted resistors as convenient test point connections. |
20th Feb 2020, 12:54 am | #4 |
Octode
Join Date: Feb 2018
Location: Southampton, Hampshire, UK.
Posts: 1,051
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Re: Question relating to resistor mounting in an AM radio circuit
Thanks for the clarification. My preliminary tests using horizontal mounting are encouraging.
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