r-390-digest Tuesday, October 28 1997 Volume 01 : Number 009 [R-390] Bristol Wrench Problem [R-390] Re: Bristol Wrench Problem [R-390] R390A...
r-390-digest
owner-r-390-digest@...
Oct 28, 1997 3:35 pm
5
r-390-digest Monday, November 3 1997 Volume 01 : Number 010 [R-390] Re: Why filters go bad - viz. bad caps Re: [R-390] (R-390) Why filters go...
r-390-digest
owner-r-390-digest@...
Nov 4, 1997 2:29 am
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r-390-digest Wednesday, November 12 1997 Volume 01 : Number 014 [R-390] Re: More on Electronic Assistance Corp./Hammarlund Re: [R-390] Oven...
r-390-digest
owner-r-390-digest@...
Nov 13, 1997 2:25 am
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David Medley
davemed@...
Nov 16, 1997 5:49 pm
8
There's another site now carrying the R-390 List! It is accessible from the Web. Point your browser to: http://www.findmail.com/listsaver/r-390/ Its really...
Michael Crestohl
mc@...
Nov 18, 1997 2:25 am
9
... Hello Joe, The 6189 is a direct mil-spec sub for the 12AU7. There are also a number of subs, which are ECC-82, 6067,6680, and 7730. The 5814 can only be...
glen galati
eldim@...
Nov 18, 1997 10:11 am
10
Good Morning all since i dont have a arrl handbook can a 5814 used in place of the 5814a which i dont have any, but plenty of the 5814>Thanks to all for your...
clarence thompson
clarence@...
Nov 18, 1997 4:32 pm
11
David Medley
davemed@...
Nov 18, 1997 5:33 pm
12
David Medley
davemed@...
Nov 18, 1997 6:09 pm
13
Hi Clarence, Regarding the audio, I was advised to use the diode load with a 620k resistor and a 10 uf cap in series. This requires and external amplifier...
Colin Thompson
burkec@...
Nov 19, 1997 5:52 pm
14
Thanks again to everyone who had encouragement and words of wisdom for me and the screw. Everyone had good suggestions except the fellow who suggested I sell...
Rick Robinson
rerobins@...
Nov 18, 1997 11:23 pm
15
My radio weekend was nearly ruined by sunny skies and temps in the high '50s. Fortunately the "honey do" list was very short so there was plenty of R-390A...
Rick Robinson
rerobins@...
Nov 19, 1997 12:18 am
16
I got this from Floyd, W8RO. I felt that it was good enough to share here and speaks volumes. - - - - - "Full Circle", a BA Poem Joe got his ticket a long...
crippel@...
Nov 19, 1997 6:11 pm
17
I have a very excellent R-392....except for the crystal calibrator function. I have a cal signal but it is not every 100 kHz, nor 200 kHz. The cal signal...
Ben Wallace
bwallace@...
Nov 20, 1997 1:48 am
18
After stepping back and thinking about my problem with the calibrator circuit......eventually found that the V702 was bad. It tested good on my TV-7 but close...
Ben Wallace
bwallace@...
Nov 20, 1997 4:17 am
19
... The R-392 uses a multivibrator running at 100 kHz. A xtal oscillator at 200 kHz is fed into the MV to keep it on freq. Sounds as if either the MV is so far...
John Kolb
jlkolb@...
Nov 20, 1997 6:15 am
20
[ The plus sign gotcha, or "When 7 Mhz is REALLY 8" ] A reminder to those who may have had an alignment planned, or had done an aligment in the past that went...
Tom Norris
badger@...
Nov 20, 1997 3:51 pm
21
... It really is "neat". Thanks! Al ... al dudley .. ajd@... ... east coast , usa | 535-d , collins 390a , hallicrafters s-76 / sx-110 ...
AjD
ajd@...
Nov 20, 1997 9:23 pm
22
Good Afternoon all, I have had my 390 since 94 this is the first winter i have used it to any great amount,what i am concerned about is the inrush of current...
clarence thompson
clarence@...
Nov 20, 1997 10:35 pm
23
... You worry about filament inrush in big power tubes but in receiving tubes, there is not much worry. You could put in inrush supressor on the radio but I...
Chuck Rippel
crippel@...
Nov 21, 1997 6:44 am
24
Clarence: One of the solutions that I have found, and I use it on all my Collins equipment, is the inrush current limiter (ICL). These are available from...
Cory Hine
hinec@...
Nov 21, 1997 2:22 pm
25
Clarence, Your note with your concerns about inrush current also suggests the possibility that you are turning your radio on and off a few times a day. If your...
An Unsigned Note
paul.courson@...
Nov 21, 1997 4:01 pm
26
Paul is right about using "standby" on the R390A or R390. One problem is that the B+ becomes unloaded and is allowed to "drift" upwards in value. The problem...
crippel@...
Nov 21, 1997 6:55 pm
27
Clarence, You are correct that it is theoretically better to turn filaments up slowly. But in practice it doesn't seem necessary. I've replaced thousands of...
Don Stepka
dts4@...
Nov 21, 1997 7:52 pm
28
... How can this occur in the R-390 since the B+ is regulated? Ken W7EKB ... Submissions r-390@......
Ken Gordon
keng@...
Nov 21, 1997 5:48 pm
29
... If you do modify the power supply; don't overspec the diodes, and add a B+ fuse. Otherwise a internal short in a tube may cause a catastrophic failure of...
Dave Rickmers
rickets@...
Nov 21, 1997 5:43 pm
30
... It's been a few years since I've done any work on an R390A, but I seem to remember that only part of the B+ was regulated. Like I said, it's been a while...
Nolan Lee
nlee@...
Nov 21, 1997 8:32 pm
31
The B+ is not regulated. The regulated voltage is screen voltage for the oscillators, I think. (Don't have the manual in front of me.) dr ... Submissions...
Dave Rickmers
rickets@...
Nov 21, 1997 6:57 pm
32
Clarence Thompson writes: snip... ... snip... This is a good point you've brought up. Last week someone posted a tube price list on boatanchors that showed...
Rick Robinson
rerobins@...
Nov 21, 1997 11:17 pm
33
... I said in the "R-390" NOT the R-390 "A". There IS a difference you know...:-) Ken ... Submissions r-390@......
