I must admit that I am not entirely convinced that some of the attenuators that have i/p and o/p shown on the pictures are actually uni-directional, particularly the low power ones. I suspect that it has just become some sort of convention to have to show i/p and o/p in the pictures.
I find it hard to believe that any manufacturer (even Chinese) would fail to indicate the i/p end if there was a danger of destroying the item.
73
Jeff G8HUL
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-----Original Message-----
From:
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[email protected]> On Behalf Of Bruce Akhurst
Sent: 19 June 2024 09:57
To:
[email protected]Subject: Re: [tinysa] Attenuators
Jeff
Yes it¡¯s often a case of you only know if you know..
Unless marked differently the male plug = input rule seems safe yet little publicity for this has seeped through to amateur experimenters it seems
Putting an attenuator chain together it¡¯s easy to forget and get the input one reversed (I often red paint or tape the inputs to help my ¡®late night head¡¯ remember)
It doesn¡¯t help that professionally we paid high prices for reversible ones just for safety (and a slightly better spec ?) but that puts another zero on the cost prices
