Hello, After much thought, I did remember that the Master II was the 11.2 MHz IF, it was the GE PE and MVP series handie talkies that were 20 something MHz IF. Sorry, I made the goof.
Paul -----Original Message----- From: Jim [mailto:[EMAIL PROTECTED] Sent: Wednesday, December 03, 2003 4:12 PM To: [email protected] Subject: Re: [Repeater-Builder] GE Stuff..... Paul Finch wrote: > OK, > Here goes. There is always going to be some similarities in radio equipment > because of the current existing technology. Look at the similarity between > the cell phones out today that are built by different companies, are they > all stealing each other's designs? I don't think so! > > Read my response> below. > > -----Original Message----- > From: Kevin Custer [mailto:[EMAIL PROTECTED] > Sent: Monday, December 01, 2003 1:10 AM > To: [email protected] > Subject: Re: [Repeater-Builder] GE Stuff..... > > > Paul Finch wrote: > > >>Kevin, >> >>Explain please! The only thing I see is the TCXO's that are even anywhere >>close. >> > > > Similarities in Mobiles: > Control Head. > > Response> Motorola white and grey and squared corners, GE Beige and tan and > rounded corners. Everybody had gone plastic at that time due to cost. Real > close! > Look at the knobs, and how they are recessed. Not to mention the 'break-away' bracket! <snip> > Channelized Crystal Elements. > > Response> Like I said, this is the only real thing I can see that is similar > but still not really the same circuit! > Mighty, mighty close! > > 5 Pole HR in a casting that is not soldered to the PC board. > Response> This style of helical resonator is the best for selectivity, I > think the noisy cities we live in drove this design. Johnson, RCA 1000 and > other serious manufactures also used this number of helical resonators, did > they copy Motorola? (RCA did copy the Master II and paid big time!) > Basically, yes. > > Dual Hysteresis Squelch. > > Response> May have gotten the idea from Motorola but did not copy the > circuit. Yes they did. Look at the schematic. > > > Single Conversion Receiver, with 11 meg I-F frequency. > > Response> GE's was 21.4 I believe and this was driven by cost as must as > anything else, it's just cheaper and some people think it keeps down > intermod. > Nope-Micor VHF was 11.7, MII VHF was 11.2 > > Same number of I-F poles. > > Response> Physics, that's just what it takes to have the required > selectivity. > > > Stable RF/AF circuitry operates on 10 volts (9.6 on the Micor) > > Response> GE's Master Pro ran their circuits on regulated 10 volts long > before Micor came out! > > > PA Protection (VSWR). > > Response> Yeah, they copied Motorola's protection circuit that only caused > more problems in the radio, I don't think GE had a SWR protection circuit, > at least I never had to work on one, I worked on a lot of Motorola > protection circuits. GE did have power control. > > > Receiver Sensitivity. > > Response> How can that be copied???? Technology improved letting everyone > improve receiver sensitivity! > > > Preamp is an option. > > Response> Everybody had that option! Guess they all copied it! > > > Frequency Ranges (Like 150.8 mc.) > > Response> I have no idea what you are getting at here, the frequency ranges > were/are set by the FCC, not Motorola! If you mean the frequency bands the > radios covered, again physics have more to do with it than Motorola or GE > and those bands go back in some form for as long as radios have been around. > Actually, it's more band allocations than anything else... The big thing about much of the above is trying to copy the specs so that they could say that they meet the spec written by a Mot engineer. > > Size. > > Response> Right, while the overall footprint is close (but no cigar) the > height of the GE radio is a 1/2 inch less than the height of the Micor, > where is the similarity? Motorola-Charcoal grey, GE-Beige. > GE Length 19.0 Width 11.75 Height 2.5 Total 558.125 > cubic inches > Micor Length 17.625 Width 13.0 Height 3.0 Total 687.375 > cubic inches > You do the math.... > > > Weight. > > Response> GE 25 pounds. Micor 26 pounds. This is with mounting plates. > GE's is very heavy metal plate and the Micor is a thin stamped plate. It's > obvious that the actual GE radio weighs less than the Micor since the plates > are so different. Thin stamped plate??? What Micor are you looking at? Every Micor bracket I've seen uses the same thickness metal as MII's. > > Gee, there are hardly any similarities now that I look at it..... > Get real...... > > Kevin Custer > > Response> Gee, lets keep this up, I am having a lot of fun while bringing > back some great memories! What this comes down to is you think Motorola > developed all the good radio technology, simply not true! I have worked on > both, I like both but prefer the GE radios. Show me an actual circuit that > is similar, that's what counts! Again, look at the schematics. Some things like PA's and oscillators are > so generic there is only one way to design them but there is a lot of > differences between the Master II and Micor radios. If Motorola truly > thought GE copied their design Motorola would have been all over GE, just > like GE got all over RCA! GE changed it JUST enough to prevent that. -- Jim -------- "The higher you are, the harder it is to pump." -Cleveland Mayor Jane Cambell, after the big black-out of 2003 Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/ Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
