AHAI knew I wasn't just another crazy As* contester!!
BTW, FlDigi or Writelog (not free) with MMSTTY are both potent RTTY
contest logging RTTY tools.
:) Curt
KU8L
On 1/4/2012 10:53 PM, Garey Barrell wrote:
Bob -
The C-Line does fine for RTTY. The transmitter has a jack on the
back
I am downsizing and selling some of my drake collection. I have the
following FS:
R-4B receiver. working and recently re-aligned. Cabinet has been repainted
and looks good.
Price... $225.00 plus shipping
T-4XB transmitter. working and puts out 120 watts on
After replacing the AC-4R resistors and T-4X 6HS6 and weak driver tube,
everything is working again for now. I never found a definitive cause for
the B+ short, but had been using the rig for AM for awhile, and noticed
behavior in this mode was different from that of a T-4XB owned. Guess will
Has the transmitter been modified to present a normal AM carrier or original?
From: w8...@aol.com [mailto:w8...@aol.com]
Sent: Thursday, January 05, 2012 05:12 AM
To: drakelist@zerobeat.net drakelist@zerobeat.net
Subject: [Drakelist] FS: R-4B and a T-4XB
I am downsizing and selling some of my
The Drake bulletin for RTTY recommended using the carrier shift even when using
narrow shift RTTY:
Even when using narrow shift, this shift circuit provides additional carrier
and opposite sideband rejection.
I've been using it. Should I not bother?
73,
Bob WW3QB
An interesting thing I've found in the S-meter circuit is that the sensitivity
adjustment (the one on the board) is listed as being 1k and I'm measuring about
600 ohms. A wee bit out of tolerance, methinks, or - the PO changed it. I
can't see any markings on it to ascertain its intended
Bob -
The 'normal' audio passband for the transmitter is 325 - 2725 Hz. The RTTY jack shifts this to ~
825 - 3225 Hz to pass the 2975 Hz tone of 850 shift. It ALSO moves the carrier further down the
skirt of the LSB filter, which would improve the carrier suppression by ~ 10 dB. I will say
There is a copy
at http://www.wb4hfn.com/DRAKE/DrakeArticles/RTTYops/Manual_RTTY.htm
I covers all the Drakes.
I would think Ron would allow you to make a copy for your CD (if permission is
really needed).
73,
Bob WW3QB
Bob -
The 'normal' audio passband
Steve -
I don't recall ever seeing one of those pots changing that much, but I guess it's possible. It may
have been fried and the 600 ohm is what he could find. Not a major problem as the two resistors can
be changed to center up the pot.
I don't know about the linearity with the shield
Bob -
OK. That's where I have seen it before. It's too bad those are such lousy scans. it's not that
hard to get a 'good' scan. I'll see what I can do with it.
73, Garey - K4OAH
Glen Allen, VA
Drake 2-B, 2-C/2-NT, 4-A, 4-B, C-Line
and TR-4/C Service Supplement CDs
www.k4oah.com
Robert
Hi Gary:
Let me do a brain verification on this linearity issue. My thought is
that the linearity is nearly 100% dependant upon the coil, core
consistency, and screw thread linearity.. THe only contribution the
caps can make to non-linearity is if they are capacity dependant upon
frequency
Alright I'm back, real life intervened for 12 or 15 hours since I asked
the RTTY question.
Thanks for the help guys. The first thing I thought of when I decided to
do this was Garey's stories about running 4 line gear on RTTY 24/7 and
it lasted for years. So I figured I had some margin for
Hi Bob:
I think I started the Silenx fan stuff...they are amazingly quiet and
the difference in heat is outstanding.
On the RTTY tune up, I just tune it up as per a CW or full SSB setup,
then set the soundcard to Tx RYRYRY...run the TX gain up until it stops
increasing the Ip, then back off
It will be interesting to closely examine it once I get it back out of the
receiver.
I didn't measure end-to-end, but did find that it is off by 6 kHz over a 100
kHz (indicated) transition - such that an indicated 100 kHz has actually moved
the frequency only 96 kHz. That difference implies
Curt -
Yes, that covers it. I believe the core is precise, and determines the linearity between the end
points. The df/ds 'centers' the span in the 'right' portion of the coil. There is a t/c cap in
most of the PTOs, but not related to the coil cap combo. The only other 'failure' would be
I'm afraid to advise on RTTY anymore since I learned I am the village idiot on
RTTY. Only ran in since 1968, so I'm still learning, but FSK is better, even
if I'm wrong again!!
73,
Don, WB5HAK___
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Drakelist@zerobeat.net
John,
Normal AM carrier can only be had with a true, plate modulated rig. The
Drakes don't have enough iron or a heavy enough modulator to do much more than
controlled carrier. I've seen mods, but. I sure wouldn't do it to
my Drakes.
73,
Don,
Now, you know that is not true...you are just more DISCRIMINATING than
the norm(FM anyone?)
How could anyone possibly tell the difference between FSK and the
SSB/AFSK equal? Oh...Oh...I can tell!!
FSK is the one that isn't QUITE on the proper offset!! :)
Curt
KU8L
On 1/5/2012 1:17
How could anyone possibly tell the difference between FSK and the SSB/AFSK
equal?
Well, let's start with being off frequency all the time because the default on
MMTTY and other programs is that #$* crap they call ATC I think. Whenever
anyone answers me so far off I have to use RIT, that's
- Original Message -
From: Don Cunningham d...@martineer.net
To: John Hudson john.hud...@calema.ca.gov;
w8...@aol.com; drakelist@zerobeat.net
Sent: Thursday, January 05, 2012 10:24 AM
Subject: Re: [Drakelist] FS: R-4B and a T-4XB
John,
Normal AM carrier can only be had with a true,
Hi Don:
Well..OKyes...but that isn't the fault of the software OR the
mode...just a dumbass operator that can't figure it out!! Ya gotta be
smarter than the hammer if you know what I mean.
Same guys that crank the snot out of the system using PSK and end up
being a KHz wide.
You
As to AM plate modulated TX...
What transmitters are preferred??
And how much power is reasonable to use on AM...that is effective for
communications.
I see some of the TX's (DX-60, Ranger etc) are only 50-70 watts out.
73,
Lee
-Original Message-
From: Richard Knoppow
Oh, good grief. I'm outa here. You all have a nice year and CU some other
time.
Opinions are worth about what you pay for them.
Later,
Don, WB5HAK
___
Drakelist mailing list
Drakelist@zerobeat.net
That's why I own a Viking II, but I've seen guys modify the Drakes..
From: Don Cunningham [mailto:d...@martineer.net]
Sent: Thursday, January 05, 2012 10:24 AM
To: John Hudson; w8...@aol.com w8...@aol.com; drakelist@zerobeat.net
drakelist@zerobeat.net
Subject: Re: [Drakelist] FS: R-4B and a
Don -
Welcome to the club!! :-)
I don't know if FSK is 'better' or not. FSK IS stable and there are no 'phantom' signals (carrier,
unwanted sideband, distorted AFSK tones) that are all quite possible with AFSK. Best thing about
AFSK is that there are no mods required to the transmitter.
Lee -
First thing to remember is that AM 'PEP' is four times the carrier power. So a Viking II at 100 W
AM output has a peak power equivalent to a 400W SSB signal. Likewise, the Ranger, etc. are
equivalent to a 200W SSB transmitter. The Ranger is a particularly nice transmitter, capable of
Larry -
That is interesting I've never experienced it, as my shack has always been air conditioned.
The PTO coil is pretty well sealed, and I wouldn't expect it to be susceptible to humidity. The
only other sources would be the BAND oscillator, crystal controlled with a lacquered
i agree re BFO..any thoughts on how to confirm which one is the culprit? was
thinking a heat source ..ie hair dryer ...or small light bulb,directed
independently at each might reveal some interesting results..
Larry WA0QHF
Sent from my iPhone
On Jan 5, 2012, at 2:59 PM, Garey Barrell
FWIW, I've been having lot of fun with a Globe Scout 40A (Heising plate
modulation) at about 20W out on 40M. Use the T-4X (controlled carrier)
also, believe it puts out about 25W and has worked fine for me. Would love
to own a Ranger but they've become too expensive lately.
Routinely have
Larry -
First, confirm that the counter is fully warmed up and stable, preferably with a TCXO or other
better quality standard.
The hair dryer or bulb heat source is undesirable for just that reason. We don't want a HEAT
difference, just humidity with continuous temperature.
Then, turn on
Icom 765 Just back from Service from Burghardts trimmers updated and relays
replaced fresh alignment PS built in Fully loaded with Filters.Also has
In-Rad roofing filter mod ,also matching SP-20 speaker and CV-17 computer
interface .This is NOT your trapped out 765 hamfest rig, Just spent
I once fed my R-4A (the 11 tube version) a premix signal from a stable modern
signal source to see exactly that. I don't know which, but the BFO and/or the
5995 Kc LO was drifting at least couple of hundred Hz over the testing period.
I personally do not care too much about the PTO drifting as
Hey guys/gals, how about changing the subject line to fit the topic?
Kris KM2KM
___
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I had a Ranger and it was nice. Sold it last fall, though, as I hadn't used
it in quite some time. It and my SX-101 were taking up too much precious
space, so I sold them and used part of the money towards some of my current
Drake stuff.
The Rangers sound great on AM and mine was hi-fi'ed
Kris -
Yeah, good point! You mean AM is not related to a FS: R-4B and T-XB?? :-)
73, Garey - K4OAH
Glen Allen, VA
Drake 2-B, 2-C/2-NT, 4-A, 4-B, C-Line
and TR-4/C Service Supplement CDs
www.k4oah.com
Kris Merschrod wrote:
Hey guys/gals, how about changing the subject line to fit the
Lee -
Could be an issue specific to your rig. Either that or my set is an
anomaly: I have no trouble being on-freq on SSB with my B's and I haven't
touched C61 in several months.
On CW, I still have trouble getting stations to hear me calling, and I'm
starting to wonder if it's more than
I set the zero point at 0 on the dial scale. My calibrator is spot-on, but I
did rely on also spotting it with my K3 at the upper end, due to the
discrepancy and the calibrator's 25 kHz spacing.
Actual Indicated
0 0
100k 105.5k
200k 210k
300k
Steve -
I'm not sure, and it's too late tonight to think about it cogently, but keep in mind that you are
NOT trying to change the resonance, merely 'slide' the range along the length of the coil. Sorta
like passband tuning. You may indeed need a little more capacitance to 'move' the range
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