Lane,
His call sign is WA8SAJ.
73,
Bob AD3K
From: drakelist-boun...@zerobeat.net [mailto:drakelist-boun...@zerobeat.net]
On Behalf Of lane denune
Sent: Monday, December 17, 2012 12:46 PM
To: drakelist@zerobeat.net
Subject: [Drakelist] Call Sign.
What's Jeff Covelli's call sign
Bill,
Are the levels what they ought to be through the signal chain? A poor solder
joint that reduced normal signal levels could cause the relative strength of
leakage to rise.
Another possibility is that someone fixed something and the receiver is
now miswired.
73,
AD3K
From:
Mark,
Yes. It is vitally important that the fuse be in the hot lead of the cord
which should be connected to the _inside_ end of the fuse holder so that
when the fuse is pulled part way out with the outside end exposed, the fuse
is not hot.
73,
Bob AD3K
From:
Ron,
Vintage radios were made with regular leaded solder so they don't have that
problem (unless you repair them with lead free solder.) It's the new rigs
that I'm concerned about. Tin whisker growth under surface mount components
would be very difficult to detect and remove. So keep your vintage
very well. I'm inclined to stay with Kester 44 60/40 solder
from this point forward.
Paul, W9AC
- Original Message -
From: Bob Spooner rl...@psu.edu
To: 'Ron' wd8...@yahoo.com; drakelist@zerobeat.net
Sent: Tuesday, November 01, 2011 8:47 AM
Subject: Re: [Drakelist] OT a failure mode
Paul,
If the OA2 is going dark on transmit it means the circuit is going out of
regulation, so there's probably lots of ripple on what is supposed to be a
regulated DC voltage. That could be the source of your bad audio reports.
The OA2 is a shunt regulator and will dim with increased current
The requirement for removing filter cap cans is to move a lot of heat energy
into the solder joint in a short period of time, so that the joint
temperature get's high enough fast enough to not heat up everything else
around it as well. (Think PL-259 braid soldering.) This can be done one of
two
Bob,
I would be concerned that the heat would clear the fuse element, or at least
make it more prone to clearing at reduced current.
73,
Bob AD3K
From: drakelist-boun...@zerobeat.net [mailto:drakelist-boun...@zerobeat.net]
On Behalf Of Robert Fish
Sent: Thursday, October 13, 2011 2:01
Bob,
Use a filament transformer with a secondary current rating equal to the full
load current of the TR-4C as an autotransformer to raise the voltage. If you
can find a single transformer with two five volt windings, you can use them
in series to get 10 volts, or you could use two five volt
Eddy,
I don't think aluminum foil makes good gasketing material for two reasons.
At least in this country, the shiny side of the foil is coated with Mylar
which is nonconducting. In addition, aluminum oxide is an insulator as well.
73,
Bob AD3K
-Original Message-
From:
Darrell and all,
My Collins 310B, which qualifies as a vintage transmitter (c. 1947) has a
phase shift sidetone oscillator. However, when I've used it, I've use a
Johnson TR switch so I can hear my transmitted signal. It makes for great
QSK operation if you're not working split. My TR7A of course
-Original Message-
From: drakelist-boun...@zerobeat.net [mailto:drakelist-boun...@zerobeat.net]
On Behalf Of kc9...@aol.com
Sent: Saturday, June 18, 2011 8:36 AM
To: john.hud...@calema.ca.gov; drbellerive.va...@gmail.com;
drakelist@zerobeat.net
Subject: Re: [Drakelist] First Rigs - If
Duane and all,
I purchased a Ten-Tec Triton IV new back in the mid '70s and used it until
2000 as my only HF rig. The only problem I had with it was with the contacts
of the reed relay for transmit/receive getting dirty because of lack of
current, and that was fixed with a company-developed
Jerry,
If it wasn't close to the flames, the next question is whether it was close
to the water that was used to put the fire out. Check things such as meters,
IF transformers, etc. carefully. You may want to put it in the oven on very
low heat for a while after you get it cleaned up before
The information I found on the TR-M says that it has transmitting gain
control. It may be possible to apply a DC voltage to that to keep the output
power down to 50 Watts for 60 Meters.
73,
Bob AD3K
From: drakelist-boun...@zerobeat.net [mailto:drakelist-boun...@zerobeat.net]
On Behalf Of
I qualified for my Novice ticket in the 70s after VFOs were allowed. When I
subsequently passed my Advanced Class exam, I was amazed - all that space!
73, Bob AD3K
-Original Message-
From: drakelist-boun...@zerobeat.net [mailto:drakelist-boun...@zerobeat.net]
On Behalf Of GALE STEWARD
Michael,
If you want the most versatility, my suggestion would be to look at the
SteppIR vertical antennas. They are continuously tunable and will work all
the way to 6 Meters. The big one covers 40 meters, and there is a loading
coil that can be used for 80.
73,
Bob AD3K
From:
Eddy,
The first thing I would try is substituting another tube. Some tubes seem to
be more sensitive to changes in voltage than others. I was able to cure a
drift problem in a Collins 310B transmitter by changing the master
oscillator tube. Barring that, you could try regulating the filament
You might want to check the impedance of your Heathkit Cantenna. Early
models did not have a coating on the resistive element and tend to
change characteristics over time. I had one that doubled in resistance.
Much more than that and you may be beyond the L7's ability to tune.
73,
Bob AD3K
Garey and all,
Is it possible to get the power supply connectors for the TR-7? I'm
planning to use mine for emergency communications and would like to be
able to run it off a battery. Where are the connectors available?
73,
Bob AD3K
-Original Message-
From:
Would the trick be to tune to the image frequency and use the preselector
to peak the WWV signal?
73,
Bob AD3K
-Original Message-
From: drakelist-boun...@zerobeat.net [mailto:drakelist-boun...@zerobeat.net]
On Behalf Of Dino Papas
Sent: Thursday, February 25, 2010 1:15 PM
To: Mail List -
Bob,
It sounds like rf from your L7 is getting into your Icom. You might try some
clip-on ferrites for the power cord, microphone cord, coax, and any other
wires going in to it.
73,
Bob AD3K
From: drakelist-boun...@zerobeat.net [mailto:drakelist-boun...@zerobeat.net]
On Behalf Of Bob
Gary,
I'm not familiar with the VF-1 but I have an Eico model 722 VFO in which
I've replaced the electrolytic capacitors. It has its own AC supply. I
haven't tried to use it on the air yet so I can't say anything about how
much it drifts. It should be possible to correct drifting by using
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