Kevin, OK, I understand now. I have (in a past life) worked as a RF engineer but don't have any of the equipment available to me. This is a Johnson Fleetcom II 530 radio I am trying to modify. Everything so far has moved to 224 MHz OK except these micro strips, it like it hits a brick wall. I will read the part about the Japanese PA Module.
What can I say, I am a different kind of guy, I have plenty of these radios so I thought I would at least try one. Will keep the Builder informed on how it comes out. Paul -----Original Message----- From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] Behalf Of Kevin Custer Sent: Monday, February 06, 2006 6:36 PM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] Re: Micro Strips @ 220 MHz I think we are talking about Micro strips and not Micor strips, but I'll add to the confusion.... In the case of the Motorola Micor, the transistors in the PA will not operate on 220 MHz, so we pull the whole PA and use Japanese bricks.... <http://www.repeater-builder.com/pix/220micorpa.jpg> Kevin skipp025 wrote: >You should email Kevin first, hasn't he done some of the micor vhf to 220 band conversions? > >I know a lot of the conversion people don't use the original Micor PA sections. After the low level rf stages they jump onto/use a replacement power amplifier module. > Actually, the exciter drives a modified harmonic filter which in turn drives a Japanese power brick directly. We normally get between 250 and 400 mW of output from the Micor exciter on 222, which, after the filter, is just the right amount of drive for the 220 power amplifier bricks that require 200 mW. Kevin Yahoo! Groups Links Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
