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<blockquote data-quote="Trust" data-source="post: 991497" data-attributes="member: 181524">John , if you have enough tubes , you can do that , but ......Cardiff did send me a raw AV-COMM barrel to machine it in the proper way , did that yesterday at my employers lathe .This morning I tested it at a 1.2 m Echostar Offset dish pointed at 5 west TP 4115 .With the AV barrel managed to get 10.7 dB .My barrel 60 mm inside with 48 mm between the second steps&nbsp; ( D2 ), showed 10.1 dBPut some 0.5 mm thin plates between step 1 and 2 to become a D2 of 47 mm , showed 10.4 dB , some increase ! Fitting the step plates with screws allow you to tune the barrel .So I decided to make new steps for a D2&nbsp; of 46 mm , no good idea , signal drops .Than I machined my second tube to a inner size of 63 mm and made new step plates for a D2 of 48 mm , about the same dimentions as from the AV barrel .The test will be made when I'm back from the dentist[ATTACH=full]99461[/ATTACH]&nbsp; [ATTACH=full]99460[/ATTACH]</blockquote>

[QUOTE="Trust, post: 991497, member: 181524"] John , if you have enough tubes , you can do that , but ...... Cardiff did send me a raw AV-COMM barrel to machine it in the proper way , did that yesterday at my employers lathe . This morning I tested it at a 1.2 m Echostar Offset dish pointed at 5 west TP 4115 . With the AV barrel managed to get 10.7 dB . My barrel 60 mm inside with 48 mm between the second steps ( D2 ), showed 10.1 dB Put some 0.5 mm thin plates between step 1 and 2 to become a D2 of 47 mm , showed 10.4 dB , some increase ! Fitting the step plates with screws allow you to tune the barrel . So I decided to make new steps for a D2 of 46 mm , no good idea , signal drops . Than I machined my second tube to a inner size of 63 mm and made new step plates for a D2 of 48 mm , about the same dimentions as from the AV barrel . The test will be made when I'm back from the dentist [ATTACH=full]99461[/ATTACH] [ATTACH=full]99460[/ATTACH] [/QUOTE]

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