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#1
December 4th 06, 10:40 AM
posted to aus.radio.amateur.misc,aus.radio.cb,aus.radio.scanner,rec.radio.amateur.equipment
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Any Motorola techs in here?
Warren NoSpam- wrote:
"atec 77" "atec77 wrote in message ... Warren NoSpam- wrote: Hello Jasco , I'm going to do something I don't do very often and that is apologise for jumping to conclusions, I must admit when I read your original posting I thought, here we go again, some UHf CBer wanting info on a very high powered Amp, so he can stomp on every one else, for that I do apologise, in my role as an emergency monitor I get quite a few of the power heads deliberately interfering with the emergency repeaters which I monitor daily, I have even had dead set deliberate interference during actual emergency calls and whilst in contact with the Police Comms Centre, as in, microphone in one hand and the phone in the other, the Police couldn't believe what they heard, so I tend to get a bit touchy when it comes to very high power on UHf CB. now back to the Amp, I see on the circuit board there is JAS marked in several places, I'm wondering if this is the manufactures identification, if so you might get some info from this mob, Jas Commerical Printers Products : Printed circuit boards Address : 38, Bombay Talkies Compound,, Somwari Bazar, N. B. Road, Malad West,,Mumbai-400064.Maharashtra. Send : On-Line Trade Inquiry http://www.easy2source.com/directory..._id=0&Len t=3 I ran a search on the net and came up with that mob, with a bit of luck they may be the manufactures and should have the info you require, wether the buggers will give the info is another thing , once again sorry for ****ing you off, Cheers, Warren Jasco, Maybe here, more info on MSF5000 if you already haven't got this link , http://www.repeater-builder.com/moto.../msf-tour.html . The following info has nothing to do with Motorola , but I recently purchased a Philips 828 back end (25 Watt PA from 828 radio) which has been modded so as to run a hand held 2 Mtr , there was no info available with it regarding input power, and me being a silly bugger didn't think to ask the bloke I bought it from :-) ( Hamfest ), so at first I set the h/h to 5 W max, the amp output was 25W, then I set the radio to low power, 0.5 W , the output was then 20 W, so I came to the conclusion to run it at low power 0.5 W, as that would most probably be the safe input power, 5 W input only raised the output by around 5 W not worth potentially blowing the driver or something major, unless of course the driver had been changed to a more robust type ?, in your case, maybe try at 1W then say 3W and see what the output difference is , if it's only 5 or 10 W on higher input power of 3 W its probably safe to run it at 1 W input, Cheers, Warren You are correct , I have made the conversion on several 828 PA with a resistive network , latest is an 828 lowband vhf on 6 ,eters with 1 watt in give 24 watts out , actual drive is about .55 watts via the resisters . Hello atec77, thanks for the verification, much appreciated, I really should have thought to ask the fellow I bought it from at the Gold Coast Hamfest, but it didn't occur to me at the time, I really went down to buy some N-Connectors as they have had them before, mixed types secondhand in a plastic bag for around $15 , wouldn't you know it, there wasn't any there haha, ah well, ya get that :-) , Cheers, Warren N/p crimps are very cheap . and the pliers are now affordable |
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