I found my Acoms Techniplus 4 (which came second hand with a boat I bought) very unreliable and the range very poor so I sold it to a clubmember very cheaply, he said he wanted it for spare parts. Some time later I saw him using it and he said it worked fine once he changed it back to original crystals. I am sure he suspected that was the problem and got a cheap radio set but good on him for being smarter than me! I would be cautious after this experience with using crystals of other brands. I have read another post about the way different makes of crystals are "cut", whatever that means. Cheers, Ian.
