I don't think I ever tuned a hi band LLT. I know the alignment procedure for the low band LLT tells you to drop the power supply voltage to something like 11 volts (when tuning the transmitter) and then back to normal power supply voltage for final transmitter alignment.
------ Original Message ------ Received: Mon, 28 Sep 2009 07:41:53 PM PDT From: "wb6dgn" <[email protected]> To: [email protected] Subject: [Repeater-Builder] Re: F M Schematic Digest, a collection of Motorola schematics. > Mike, > The 150 Mc. has exactly the same 50 Mc. "driver" which, instead of going to an output filter, goes to the varactor tripler. So the VHF hi radio has the worst of both worlds; the germanium "drivers" AND the varactor. That's precisely why I'm afraid to touch mine until I can find the proper alignment procedure. I'm sure there's precious little leeway in tuning that thing before the smoke escapes. Also, I can't find a TUNE/OPERATE switch or contact on the thing either. I hate to think you have to tune that thing with full input; especially moving it as far as I want to! Good Luck! > Tom DGN > > > --- In [email protected], Mike Morris WA6ILQ <wa6...@...> wrote: > > > > While you have the high band version, the low band version > > has matched quad germanium finals that are / were very fragile. > > > > When the California Highway Patrol surplused the 51LLT Motran > > fleet (they went to special production 71RTA Micors) I sent > > a Motran in a custom fitted wooden box, and both a cable and a > > head in a cardboard box to a ham at Siliconix. He was going > > to come up with a replacement VMOS power FET, but it and > > he evaporated. > > > > Mike WA6ILQ > > > > At 04:58 PM 09/27/09, you wrote: > > >Hi Guys, > > >If anyone has an edition of the Schematic Digest that covers the > > >ORIGINAL Motran VHF mobile (U43LLT) I would dearly love to get a > > >copy of the transmit alignment instructions. I've got one of those > > >radios and I hesitate to do anything with it until I know the proper > > >tuning sequence and readings because of the fragility of the output > > >(multiplier) varactor in the thing. I would be very happy to pay > > >for a readable photocopy of the transmit alignment so I can get my > > >radio on the air. I've got all of the other information I need, so > > >just those one or two pages will allow me to get the thing > > >going. Also would be happy to assist in scanning this, or any > > >other, material for submission to RB if needed. > > >Thanks, > > >Tom DGN > > > > > > > > >--- In [email protected], "Wayne" <wa5luy@> wrote: > > > > > > > > Thanks to all for the interest. If Eric wants it for > > > Repeater-Builder I will donate it to the cause. > > > > > > > > 73 > > > > Wayne > > > > > > > > --- In [email protected], "Eric Lemmon" <wb6fly@> wrote: > > > > > > > > > > Before giving away such an interesting and informative document, please > > > > > consider lending it to the Repeater-Builder scanning team for conversion > > > > > into a full-size PDF for others to use and enjoy. Contact me off-list at > > > > > mycall at verizon dot net for more information about > > > large-format scanning. > > > > > > > > > > 73, Eric Lemmon WB6FLY > > > > > > > > > > > > > > > -----Original Message----- > > > > > From: [email protected] > > > > > [mailto:[email protected]] On Behalf Of Tony Faiola > > > > > Sent: Saturday, September 26, 2009 12:36 PM > > > > > To: [email protected] > > > > > Subject: Re: [Repeater-Builder] F M Schematic Digest, a collection of > > > > > Motorola schematics. > > > > > > > > > > > > > > > > > > > > Hello Wayne: > > > > > > > > > > I came across one also. Would you like another one?? > > > > > > > > > > Tony, K3WX > > > > > > > > > > On Sep 26, 2009, at 12:49 PM, Wayne wrote: > > > > > > > > > > > Motorola collectors. I came across a copy of F M Schematic Digest > > > > > > by Sherman M Wolf. Publishing date unknown. > > > > > > This is an 11 x 17 inch booklet containing 136 pages of schematic > > > > > > diagrams representing much of the equipment manufactured by > > > > > > Motorola in the 1950 era. Included are alignment charts, crystal > > > > > > information, and even dynamotor information. Models covered are > > > > > > Motrac, Motran, Dispatcher, T-Power, Twin-V, Sensicon, Micro- > > > > > > Talkie, and much more. > > > > > > Looking at the pictures brings back a lot of memories. If anyone is > > > > > > interested in this book please contact me by reply to sender. > > > > > > > > > > > > Wayne , WA5LUY > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > ------------------------------------ > > > > > > > > > > > > > > > > > > > > > > > > Yahoo! Groups Links > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > >------------------------------------ > > > > > > > > > > > >Yahoo! Groups Links > > > > > > > > > > > > > >
