I posted the other day that R-390As use #328 lamps in the frequency display. Someone else posted #387 lamps, but didn't say for which radio. My 390A has #328s...
Don Stepka
dts4@...
Dec 1, 1997 8:08 am
87
... Now, my 1960 EAC has DeJur meters, each with the 59.xxxx date code. My 1963 Imperial has "INTERNATIONAL" above the scales of each meter. No other markings....
Tom Norris
badger@...
Dec 1, 1997 6:46 am
88
You are correct. I misread the bulbs. Must get stronger glasses. dr ... Submissions r-390@......
Dave Rickmers
rickets@...
Dec 1, 1997 3:56 pm
89
Hello, name here is Scott and I have a problem, hope a small one, with my Motorola mfg R-390A. It was working fine then without warning all I get from the...
Scott Livingston
kc4swl@...
Dec 2, 1997 3:05 am
90
... Anyone else notice the Japanese Commercial Receiver also pictured? It's a dead ringer of an NC-173/183. I've heard that the Japanese copied HRO receivers...
Rick Robinson
rerobins@...
Dec 2, 1997 4:07 pm
91
I've added some color scans of this radio at my page: http://www.concentric.net/~R390a/r864.html Does anyone have information on a possible companion...
David Merrill
r390a@...
Dec 2, 1997 3:27 pm
92
Tom Marcotte dug up some interesting material on a Japanese variant of the R-392. Other than the outside case and shifting the IF from 500 to 384 Kc, it looks...
P. J. Rovero
provero@...
Dec 2, 1997 7:01 pm
93
... The RF deck is running away. You have a failed or loose in its socket C-227 located on the cathode of V-201. It screws into the chassis and can be seen...
crippel@...
Dec 2, 1997 8:03 pm
94
The flip down cover is not THAT unusual. I've had 2 r-390s over the years with them, both Collins issue. I suspect it was designed to keep non-secure personnel...
Radiomatt@...
Dec 2, 1997 9:59 pm
95
The flip down cover is not THAT unusual. I've had 2 r-390s over the years with them, both Collins issue. I suspect it was designed to keep non-secure personnel...
Radiomatt@...
Dec 2, 1997 9:59 pm
96
While working on my '67 EAC over the weekend, I noticed that the 4KC filter had been replaced. There are 3 round emblem Collins filters and 1 Freimuth Ind....
Rick Robinson
rerobins@...
Dec 2, 1997 9:53 pm
97
You're right, it DOES seem that the 4 KC filter is a common failure problem. I lost one too (a Collins marked unit). Come to think of it, I've never heard of...
Thomas A. Adams
103360.2133@...
Dec 3, 1997 3:21 am
98
... The only ones that I ever had fail were also the 4khz ones. Weird, huh? nolan If god had not intended us to have semi automatic rifles, We would have a...
Nolan Lee
nlee@...
Dec 3, 1997 3:32 am
99
Hello all, On my Caphart R390A, I have some really loud audio. I mean I can turn the local audio control down all the way and it still is loud. I am using an 8...
Keith Heitzmann
kk5fe@...
Dec 3, 1997 5:14 am
100
I wonder if it would be a good idea to exercise some preventative maintanence and replace the filter blocking cap with a new one, or perhaps a person could...
Jim Zellmer
zellmer@...
Dec 3, 1997 5:26 am
101
Tom Bowes has a nifty meter "kit" for the 390 and 390A. The kit includes two meters that are similar to the 390 meters, two sets of dial scales ( black and...
Tom Norris
badger@...
Dec 3, 1997 6:05 am
102
... It's a very good idea and has been recommended several times on the internet. Just one of the things I need to do when I get the workbench clean enough to...
John Kolb
jlkolb@...
Dec 3, 1997 6:56 am
103
Bob Nickels gave me a lead on someone who did meter 'kits' that converted surplus non-R390A meters to something relatively authentic and usable.. his name was...
DCrespy@...
Dec 3, 1997 1:45 pm
104
Maybe because most radios were operated at that bandwidth setting? The part might not be any better/worse than the others, it just gets worn out. It does,...
P. J. Rovero
provero@...
Dec 3, 1997 3:39 pm
105
heh A curmudgeon at Large can't be all bad! Dan ... ******************************************************* * Dan Ferguson...
Dan Ferguson
df@...
Dec 3, 1997 4:26 pm
106
Well, I've decided my wrists need a break...:-) I have for sale an R-390A "package" for $450.00 for local (New Hampshire) pickup. This "package" includes: o A...
L. Mark Pilant - MS:Z...
pilant@...
Dec 3, 1997 5:08 pm
107
... Sounds like you lost the ground on one end of your volume control ... Chuck Rippel crippel@... "You never get a second chance to make a first...
crippel@...
Dec 3, 1997 6:31 pm
108
... Simply replace C-553 with a 600V Orange Drop. Works very well. Don't waste you time wiht 2 caps in series. That is overkill to the point of no return and...
crippel@...
Dec 3, 1997 6:27 pm
109
I've got a model SPA-3/25a Panoramic Spectrum Analyzer made by the Singer Company, Panoramic Radio Products division in Mt. Vernon, N. Y. It's an R390A grey,...
Morton Denison
mdenison@...
Dec 3, 1997 4:26 pm
110
... This is an interesting point. Does anyone know if mechanical filters actually do wear out? The 4khz one in my R390A is faulty as well. 73 de Morris VK3DOC ...
Morris Odell
morriso@...
Dec 4, 1997 5:40 pm
111
... The Communications Electronics Inc. (now Watkins-Johnson) SM-8512 and SM-8513 were both made as companions for the R-390(A). They display 5, 20, or 50kHz...
Terry O'Laughlin
terryo@...
Dec 4, 1997 6:50 pm
112
The American Coil and Transformer Co of Richmond Hill, NY was an original maker of transformers and coils for many mil BA's. They have an online catalog with...
Tom Marcotte N5OFF
trinit69@...
Dec 5, 1997 1:26 am
113
Greetings, I have read several comments regarding the unpleasent audio generated by the ringing of the mechanical filters in the R-390A that is not present in...
Colin Thompson
burkec@...
Dec 7, 1997 7:06 am
114
Does anyone have the instructions or recommendations for how to set up two R-390-A's (or Non-A's) for diversity reception? Any experience or help would be...
James M. Toney, Jr.
tcltd@...
Dec 6, 1997 10:08 pm
115
Here's a question for the group: What causes tube failure and what can we do to prolong the life of receiving and transmitting tubes? So far, my searches on...
