[Milsurplus] Fw: Pre-WWII Aircraft Radio Transmitters & Frequency Meters

[jcoward5452 at aol.com]

Thanks DeWitt.
 That is very interesting.Anyone actually have an LJ?
 Jay KE6PPF






-----Original Message-----
From: DeWitt Clay <n4qnx at yahoo.com>
To: milsurplus <milsurplus at mailman.qth.net>
Sent: Sun, Jun 12, 2011 8:09 pm
Subject: [Milsurplus] Fw: Pre-WWII Aircraft Radio Transmitters & Frequency Meters


 
 got out the chapter on Frequency meters from the 1936 Aircraft Radio pamphlet 
nd have started to look it over. It states that the LJ and LJ-1 were the the 
eters availible for use to set up transmitters and receivers at the time of 
riting the pamphlet. The LJ was used with  the GO transmitter. It states that 
he LM was coming out at about that time, said to be very promising with its 
ingle, low drift AT cut xtal and likely superior to the LJ. The LJ meter 
omewhat resembles the LM in appearence, size, and power requirements. The LJ is 
a 3 tube set employing a 75, 6A7, and 37. Frequency coverage given as 200-1500 
C and 2000-13600 KC. The LJ is a Xtal Oscillator-Heterodyne type like the LM 
ut had 10 Xtals ground to Navy frequencies (X or Y cut) for direct checks also 
or calibrating the heterodyne oscillator as in the LM we are familiar with. The 
LJ-1 is a 4 tube affair (37, 6A7, 37,37) employing an extra audio stage to drive 
high or low impedance headphones. It is also a Xtal-Heterodyne type also 
mploying 10 xtals for check points but these are mainly ground for harmonic 
peration except for a few direct frequencies on the low range. Range 200 to 
500 KC and 3000 to 13575 KC. Got to get this out, hi! More next time.
3, DeWitt  N4QNX


_______________________________
rom: "jcoward5452 at aol.com" <jcoward5452 at aol.com>
o: n4qnx at yahoo.com; milsurplus at mailman.qth.net; arc5 at mailman.qth.net
ent: Sun, June 12, 2011 5:29:57 PM
ubject: Re: [Milsurplus] Pre-WWII Aircraft Radio Transmitters
Hello DeWitt,
First I've heard of a LJ frequency meter. Can you descibe and elaborate? Do any 
exist today? What time frame was it used? WW I or between the wars? I am 
ntrigued!
Thanks,
            73 Jay Ke6PPF


----Original Message-----
rom: DeWitt Clay <n4qnx at yahoo.com>
o: milsurplus <milsurplus at mailman.qth.net>
ent: Sun, Jun 12, 2011 1:00 pm
ubject: Re: [Milsurplus] Pre-WWII Aircraft Radio Transmitters

ay,  The Navy had the LJ and LM frequency meters to set up the GO, GP, GF on  
requency. The specs for the GO (1933) called for the rig to  maintain a given 
requency setting to +- .05% of F. The GO-3, GO-7, GO-8, and  GO-9 Westinghouse 
igs are most likely similar in design and  appearence. The data for the GO-3 
1933) and GO-9 (1940) shows that quite  clearly. I have no data on the tube 
ineup for the GO-1, GO-2, GO-4, GO-5, GO-6  so I can't comment. I'm making a 
uess that the Westinghouse GO-7, and   GO-8 closely follow the GO-3 and GO-9 in 
appearence and design.   73, DeWitt N4QNX  
_____________________________________________________________
ilsurplus mailing list
ome: http://mailman.qth.net/mailman/listinfo/milsurplus
elp: http://mailman.qth.net/mmfaq.htm
ost: mailto:Milsurplus at mailman.qth.net
This list hosted by: http://www.qsl.net
lease help support this email list: http://www.qsl.net/donate.html