Robert Ladden [EMAIL PROTECTED] made an utterance to the drakelist gang
--
Hello all,
I just got my C-Line out of the closet after 25+ years of storage. They
seem to work OK. I've been playing with them with a dummy load
Robert Ladden [EMAIL PROTECTED] made an utterance to the drakelist gang
--
I want to thank all of you for your advice. Even though I followed the
instructions to adjust C6 for no carrier, it is more complicated than that.
I
Robert Ladden [EMAIL PROTECTED] made an utterance to the drakelist gang
--
Hello again,
After more testing, I must be way off. Even though I have the carrier
completely suppressed now, I discovered that when I tune I have much
Robert Ladden [EMAIL PROTECTED] made an utterance to the drakelist gang
--
I recently purchased a match trio of 6JB6's. I wanted a matched pair for my
T-4XC, and now I have those too. I don't need a matched trio and I don't
Robert Ladden [EMAIL PROTECTED] made an utterance to the drakelist gang
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I am selling my FS-1500 serial number 396 crystal filter which I just
removed from my R-4C. It is working great and in excellent condition, it
just
Robert Ladden [EMAIL PROTECTED] made an utterance to the drakelist gang
--
Vincent,
I would guess that one or both of the carrier oscillators are off. I found
it does not take much. I recently had to adjust mine. I found
Robert Ladden <[EMAIL PROTECTED]> made an utterance to the drakelist gang
--
The 12AU7A is one of the tubes that audiophiles crave. But we don't need
to be as demanding in our gear. At tubedepot.com (where I go) the
Robert Ladden [EMAIL PROTECTED] made an utterance to the drakelist gang
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Steve,
I got the correct 30m xtal (20.8) new from International Crystal for
$20.00. All I could find on the used market was the incorrect crystal
Robert Ladden [EMAIL PROTECTED] made an utterance to the drakelist gang
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I had this status once when the email address was incorrect. My
PayPal payment to Joe when through right away. I would check it. If
wrong, you can
Robert Ladden <[EMAIL PROTECTED]> made an utterance to the drakelist gang
--
The wire colors vary so I cannot just say how to connect it by color. If
you remove the bottom, you should find a wiring diagram for that mic
Robert Ladden [EMAIL PROTECTED] made an utterance to the drakelist gang
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See eBay item 130130901159. These are homebrew (not Tubesters) and
sold for $25.00. I saw them but did not buy. Were there instructions
published
Robert Ladden [EMAIL PROTECTED] made an utterance to the drakelist gang
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The connections you seek are on the AC-4, not on the TR-4 (the last
place you would look). The XMIT AGC is the ALC line and the VOX RLY
keys the amp
Robert Ladden [EMAIL PROTECTED] made an utterance to the drakelist gang
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Did you know that if the cinch connector becomes loose on the back of
a T-4XC, the bias may become disconnected but the plate voltage can
remain? I
Robert Ladden [EMAIL PROTECTED] made an utterance to the drakelist gang
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I wanted to get a replacement spare set of Sylvania 6JB6's from RF
Parts. I placed the order online and the next day they called and
told me they were
Robert Ladden <[EMAIL PROTECTED]> made an utterance to the drakelist gang
--
When I ordered from RF Parts a couple of weeks ago, they were out of
Sylvanias and offered me RCAs (no mention of that on their web site). T
Robert Ladden [EMAIL PROTECTED] made an utterance to the drakelist gang
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The first set of caps lasted 30-40 years. Would the new caps last
less than that?
I think it is more likely that the cinch connector would become
Robert Ladden [EMAIL PROTECTED] made an utterance to the drakelist gang
--
Hello,
I'm fixing my new TR-3. The alignment instructions says to make an
alignment load with a .005 uuF disk ceramic capacitor (note that is
.005 pF
Robert Ladden [EMAIL PROTECTED] made an utterance to the drakelist gang
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The 'A' at the end of the tube number means that the filament will
heat up within 11 seconds. You can ignore the 'A'.
The Precision 612 is a basic
Robert Ladden [EMAIL PROTECTED] made an utterance to the drakelist gang
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Did you move things around when you switched rigs? I found (the hard
way) that it is possible for the cinch connector to get in an angle
where the bias
Robert Ladden [EMAIL PROTECTED] made an utterance to the drakelist gang
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Have you ever replaced the caps in the AC-4?
73,
Bob WW3QB
At 07:18 PM 2/26/2008, you wrote:
Howard Traxler [EMAIL PROTECTED] made an utterance
Robert Ladden [EMAIL PROTECTED] made an utterance to the drakelist gang
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In International Crystal terms, FC is the channel frequency. That is
the frequency that the operator sees (such as 14.0 MHz). FX is the
crystal
Robert Ladden [EMAIL PROTECTED] made an utterance to the drakelist gang
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I use RTTY on my T-4XC/R-4C. I use a old Timewave DSP 9+ box between
the R-4C and the MS-4. It has an output for a TU and another one for
a speaker
Robert Ladden [EMAIL PROTECTED] made an utterance to the drakelist gang
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55-110W is a part number (not the wattage). I found them online. They
are 6V 20mA. About $9.00 each. I have not used them. I have the
replacement blue
Robert Ladden [EMAIL PROTECTED] made an utterance to the drakelist gang
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International Crystal Manufacturing (ICM) has been an excellent
source for crystals for my C-Line. I don't know if their web site is
that informative
Robert Ladden [EMAIL PROTECTED] made an utterance to the drakelist gang
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I have one and have opened it. I still use it. It opens easily by
removing the screws you can remove (the bolts are not removable) and
sliding it apart
Robert Ladden [EMAIL PROTECTED] made an utterance to the drakelist gang
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I saw it and considered bidding. A manual can be found on BAMA at
http://bama.edebris.com/manuals/magnum6/drake
73,
Bob WW3QB
At 08:56 AM 6/2/2008
Robert Ladden [EMAIL PROTECTED] made an utterance to the drakelist gang
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I just picked up a TR-4 sn 23176. It's dirty and needs work. It does
receive on both sidebands which is very good news. It also has a
noise blanker
Robert Ladden [EMAIL PROTECTED] made an utterance to the drakelist gang
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See the 7 and 9 pin miniature socket saver plugs on this page:
http://www.vacuumtubesinc.com/socketsparts.html
73,
Bob WW3QB
At 12:01 AM 7/18/2008
I use GE's in my T-4XC and they neutralized easily without modification,
with the variable cap near half meshed (pretty good). Oddly, I had RCA's
that I could not neutralize. But by the 1970s it was hard to tell who
really made what tube. Look for a series of dots by the tube number
stamp. Tubes
The S-meter is tied to the AGC, so no AGC means no S-meter. The
S-meter sensitivity can be adjusted on the R-4. I don't know about the
2B. You probably can adjust either of them to get similar readings (I
doubt a match through all readings). S-meters are notoriously
inaccurate.
73,
Bob WW3QB
At
Garey was kind enough to send me a write-up from someone (no name on
it) who did an excellent job documenting it (with pictures). Too bad
I cannot find it on the web.
He had to notch the PCB with a Dremmel tool to get it to fit. I did
that as much as it would allow and it still would not
After getting my TR-3 to partially work and having a QSO on 80M last
night, this morning the TR-3 will not receive. It just hears the
calibrator when the sideband switch is in the X position. The VFO has
no effect. There is no voltage at the V1 test point, so I lost the
oscillator. I did not
Call me an idiot!
Everybody: You're an idiot!
When I took off the covers, I also removed the remote VFO plug. I
forgot to put it back. The TR-3 needs it jumpered.
I finally figured this out when taking resistance measurements and
pin 7 of V2 should be 7 Ohms. It measured open. Imagine how
Now that I'm back on track I performed the alignment procedure,
including T-8 and T-10. No joy. Weak receive and no transmit on 40M
and 15M. Surprisingly, 10M does transmit well.
The crystal oscillator is not good. The test point is +3.9V and won't
change. Swapping crystals from a TR-4 did
I'll add that adjusting L1 has no effect.
At 08:02 PM 1/3/2009, you wrote:
Now that I'm back on track I performed the alignment procedure,
including T-8 and T-10. No joy. Weak receive and no transmit on 40M
and 15M. Surprisingly, 10M does transmit well.
The crystal oscillator is not good.
SUCCESS!
For the very few that are following my trials (from e-mail encouragments).
It did not make sense that the rcvr was receiving at all on 40M. My
signal source was the xtal calibrator. So I used my C-Line into a
dummy load, and viola, the TR-3 is receiving nothing at 40M. It was
Yes, I want a female. I want to be able to connect my amplifier to my
T-4XC and my TR-3. The AC-3 does not have a VOX connector. I do have
male VOX plugs. I would hang the female VOX connector off the cinch
plug like the speaker plug is.
Anyone keep them when they changed plugs on the AC-4?
I may remember someone in Europe using them in Drakes. It would either take a
separate power supply (not hard to do) or some voltage multiplier/resistor
combination (not that hard either). Some day we may be grateful to get
(any)JB6's. With a lot of 12, I would not throw them away. I would
The meters in my TR-3 are very bouncy. They are also magnetically coupled
together, so one will drag the other a bit and cause more bouncing. I was told
the early meters did this. This may be different than your problem.
73,
Bob WW3QB
--- On Sat, 3/14/09, STEVE SCOGGINS ke...@yahoo.com
I had an unfortunate accident. I was using my T-4XC in CW. I finished but left
it in CW mode. I was doing something else in the basement (where the shack is)
when I heard a fizzle. I saw the T-4XC turn off. I ran to it and saw the 6JB6's
fade from orange. The keyer did something bad, and I was
To: Robert Ladden rmlad...@yahoo.com, drakelist@zerobeat.net
Date: Saturday, April 11, 2009, 10:55 PM
Most likely you did not head warnings
about rebuilding AC-4 power supplies. When the old bias
supply goes out, and it will, the final tubes will draw
unlimited current and you have melt down. Most
Drake 2-B, 4-B, C-Line TR-4/C Service Supplement CDs
www.k4oah.com
Robert Ladden wrote:
I had an unfortunate accident. I was using my T-4XC in
CW. I finished but left it in CW mode. I was doing something
else in the basement (where the shack is) when I heard a
fizzle. I saw the T-4XC
While my T-4XC was sick, I used my TR-3 with a RV-3 in near junk condition. I
has to re-solder several connections, so someone has been in there before. But
I got it working. One problem remains. The dial is showing the correct
frequency, but the stop lock engages about 5 kHz too high on the
That is what I do. I use a 24VDC computer fan and run it at 12VDC. Effective
and quiet. Be sure to have it blow upward.
73,
Bob WW3QB
--- On Fri, 5/29/09, Kris Merschrod k...@merschrod.net wrote:
From: Kris Merschrod k...@merschrod.net
Subject: Re: [Drakelist] (no subject) cooling fan for
The list has been indispensable to me. I could not keep my Drakes going without
it. I've been saved multiple times by the list.
73,
Bob WW3QB
--- On Sun, 6/14/09, Thom LaCosta k3...@zerobeat.net wrote:
From: Thom LaCosta k3...@zerobeat.net
Subject: Re: [Drakelist] List Downtime
To:
See Garey Barrell's suggestion in the Drakelist archive at
http://www.mail-archive.com/drakelist@zerobeat.net/msg09740.html
I have not needed to try this, but Garey is a true expert (and get well soon).
I would try replacing the tube first anyway (much cheaper).
73,
Bob WW3QB
--- On Fri,
There are at least eleven versions of the TR-4/C. They were made for about 14
years. Is your manual the original for your TR-4?
Garey K4AOH was collecting the versions of the schematics and including them on
his service CD (which I assume will be available after he recovers. I need the
CD
A correction. I mistyped Garey's call (sorry). It is K4OAH.
--- On Sat, 9/5/09, Robert Ladden rmlad...@yahoo.com wrote:
From: Robert Ladden rmlad...@yahoo.com
Subject: Re: [Drakelist] Which tubes are the right tubes
To: drakelist@zerobeat.net, Walker g...@worldnet.att.net
Date: Saturday
Yes, the 2A and 2B use 8BN8's. Garey (who else?) explained it on this list at
http://www.mail-archive.com/drakelist@zerobeat.net/msg06662.html
Garey, we really need you. Glad you're getting better. Please let us know when
you can take orders for your CDs.
73,
Bob WW3QB
--- On Sat, 9/5/09, Tom
See http://www.wb4hfn.com/DRAKE/DrakeManuals.htm
73,
Bob WW3QB
--- On Mon, 9/7/09, Jim Zellmer j...@ka0vsl.com wrote:
From: Jim Zellmer j...@ka0vsl.com
Subject: [Drakelist] Looking for info on MN-75
To: drakelist@zerobeat.net
Date: Monday, September 7, 2009, 2:22 PM
I am looking for
I heard them in Maryland, but I could not hear the net control so I did not
check in. They are a dependable group and I check in about once per month. But
40m is very flaky during that time of day.
73,
Bob WW3QB
--- On Sun, 9/20/09, Richard Bell richfb...@sbcglobal.net wrote:
From: Richard
Seems to be working.
--- On Mon, 10/19/09, AirRadio airra...@dsl.pipex.com wrote:
From: AirRadio airra...@dsl.pipex.com
Subject: [Drakelist] test
To: drakelist@zerobeat.net
Date: Monday, October 19, 2009, 4:27 PM
Test, this reflector does not seem to be working
again??
I am using the
Often asked. It is a Potter Brumfield R10-E1Y4-V2.5K. I get them from Mouser.
73,
Bob WW3QB
--- On Sun, 11/8/09, STANLEY WHITE stnlywh...@rogers.com wrote:
From: STANLEY WHITE stnlywh...@rogers.com
Subject: [Drakelist] relay
To: drakelist@zerobeat.net
Date: Sunday, November 8, 2009, 4:08 PM
In my twins I put 20.8 crystals in both units. Keeps it simple. The band just
starts at 9.7 in both.
I would complain that there is a nasty birdy from the VFO at 10.103. I have not
done the math, but I wonder if a different crystal frequency could move the
birdy below 10.1.
73,
Bob WW3QB
---
I use a D-104 with my TR-3 with good reports. Also a Shure 444 will do well.
The classics work.
73,
Bob WW3QB
--- On Mon, 11/16/09, AD5VJ Bob rt...@sbcglobal.net wrote:
From: AD5VJ Bob rt...@sbcglobal.net
Subject: [Drakelist] TR-3 MIC
To: drakelist@zerobeat.net
Date: Monday, November 16, 2009,
WW3QB
--- On Mon, 11/16/09, AD5VJ Bob rt...@sbcglobal.net wrote:
From: AD5VJ Bob rt...@sbcglobal.net
Subject: RE: [Drakelist] TR-3 MIC
To: 'Robert Ladden' rmlad...@yahoo.com
Date: Monday, November 16, 2009, 11:34 PM
Hi Bob
Thanks, do you like the D-104 or the Shure the
best?
Bob AD5VJ
My T-4XC has changed behavior in Tune mode. It was that as I
turned up the gain the plate current and output would increase gradually. Now
there is no increase until the 12:00 position, where it is almost full power.
Then I have to turn in down to decrease power. SSB and CW modes seem to work
I have a pair of Sylvania 6JB6A tubes, stamped Sylvania and made in USA in
yellow, that are a quarter-inch taller than any other 6JB6 that I have seen.
They are also stamped BR and AEW. They are too tall for the cage. Anyone know
the history?
73,
Bob WW3QB
start oscillating with the gain turned up.
It was still OK in SSB mode.
73,
Bob WW3QB
--- On Sun, 12/27/09, Robert Ladden rmlad...@yahoo.com wrote:
From: Robert Ladden rmlad...@yahoo.com
Subject: [Drakelist] Change in T-4XC Tune Mode
To: Drakelist drakelist@zerobeat.net
Date: Sunday, December
I have had good luck with a Jackson 648A tester. It is not an expensive Hickok
mutual conductance tester. It uses a Dynamic testing circuit and there is
much debate if that is really better than simple emission testing. But it does
have a test I have found useful. It has a “Life Line Indicator”
That got me wondering how much the life test drops the filament voltage. I put
a 6JB6A in my tester and measured the filament voltage. The tester's normal
6.3V was really 6.2V. The life test dropped it to 5.6V. On a 12AX7 it dropped
from 12.7V to 11.6V. So it only drops the voltage about 9%.
I run a 24VDC fan at 12V.
--- On Mon, 3/8/10, Ronald Erickson ronalderickson...@gmail.com wrote:
From: Ronald Erickson ronalderickson...@gmail.com
Subject: Re: [Drakelist] Question on Drake TR-3
To: Robert Ladden rmlad...@yahoo.com
Cc: drakelist@zerobeat.net, n9...@juno.com n9...@juno.com
I think there were at least three versions of the TR-3. I have an early version.
73,
Bob WW3QB
--- On Fri, 3/26/10, n9...@juno.com n9...@juno.com wrote:
From: n9...@juno.com n9...@juno.com
Subject: Re: [Drakelist] TR4 Versions Manuals Supplementary Instructions
To: k4...@mindspring.com
Cc:
The T-4XC is a transmitter so it would not use a noise blanker. If you meant
the R-4C receiver, no, it will not work. The R-4C could use the NB-4 noise
blanker, which is very different.
--- On Thu, 4/29/10, Michael Sue Trussell mtruss8...@comcast.net wrote:
From: Michael Sue Trussell
I had this problem when a crystal filter on the back was not making a good
connection with one of the pins. Wiggle each filter. The static crashes would
occur out of nowhere and last a few seconds. Took me weeks to find it.
73,
Bob WW3QB
--- On Sat, 7/31/10, K4GM- George k...@verizon.net
There is a 2-B crystal chart online at
http://www.wb4hfn.com/DRAKE/DrakeArticles/Drake2B_Crystal_Sheet.htm
73,
Bob WW3QB
--- On Mon, 8/9/10, Paul Barnes cribb...@clearwire.net wrote:
From: Paul Barnes cribb...@clearwire.net
Subject: [Drakelist] Drake 2-B crystal spec?
To:
My 2-B #4281has a white button. It seems original. I wonder what happened.
73,
Bob WW3QB
--- On Wed, 8/18/10, Bob W5GU boboftu...@gmail.com wrote:
From: Bob W5GU boboftu...@gmail.com
Subject: Re: [Drakelist] Something for the 2B rivet counters
To: drakelist@zerobeat.net
Date: Wednesday, August
I removed my 2-B from the cabinet to view the button from behind. It is more
pink,back there so it probably was red so many years ago. The red switches are
still red and the dial is clear, so it may have not been in the sun. Perhaps
the replacement buttons had better dye and stayed red.
No, that is very abnormal and there must have been an error made when
assembling the Heathkitshop kit. You better check it and determine what is
getting so hot before severe damage occurs.
73,
Bob WW3QB
--- On Tue, 9/7/10, Joe Loverti ww8x@gmail.com wrote:
From: Joe Loverti
I use the KB8XI interface that can be found at
http://www.qsl.net/wm2u/interface.html (down the page) on my C-Line. It works
for PSK but I use it mostly for RTTY AFSK and Hellschreiber.
73,
Bob WW3QB
--- On Fri, 9/17/10, Bill Ellis wb9...@yahoo.com wrote:
From: Bill Ellis wb9...@yahoo.com
I use a tube tester and it will find the ones that were run into the ground or
fried. Also the life test does seem to be useful, it reduces the filament
voltage a little and finds more weak tubes.
A tube tester will find the obvious duds, but passing tubes still may not work
well or for that
For #1, the manual is correct. There could be several reasons you show no
current. Check all the voltages according to the voltage chart.
For #3, that's not normal and I've seen this before. The crystal oscillator
and/or VFO is not oscillating. You are not hearing on the frequency you think
See my (embarrassing) similar thread on the Drakelist archive at
http://www.mail-archive.com/drakelist@zerobeat.net/msg10733.html
I bet you have some resistors to replace. Hopefully nothing more. Also check
the AC-4.
73,
Bob WW3QB
--- On Tue, 10/12/10, Hunter Ellington wb9...@yahoo.com
Let's start with the obvious. Is the INJ cable connected well at both ends?Did
you put Deox-it on more than the T/R relay?
73,Bob WW3QB
--- On Sun, 11/14/10, Don Jones k...@comcast.net wrote:
From: Don Jones k...@comcast.net
Subject: [Drakelist] C-line will not go into transceive mode...
It's very subjective. I have them. They are very blue, much bluer than stock. I
like them.
73,Bob WW3QB
--- On Fri, 12/3/10, Bob Jackson b...@nofrowns.net wrote:
From: Bob Jackson b...@nofrowns.net
Subject: [Drakelist] Blue LEDs
To: Drake List drakelist@zerobeat.net
Date: Friday, December 3,
You may be referring to
this:http://www.wb4hfn.com/DRAKE/DrakeArticles/DrakeRefurbishing/Refurbishing-01.htm
73,Bob WW3QB
--- On Sun, 12/26/10, Bob Jackson b...@nofrowns.net wrote:
From: Bob Jackson b...@nofrowns.net
Subject: [Drakelist] Restoration vs. Refurbishment
To: Drake List
I agree. I use a s9+ with my R-4C and TR-3, for CW, SSB, and RTTY. It is quite
helpful.
73,Bob WW3QB
--- On Sat, 2/5/11, Hunter Ellington wb9...@yahoo.com wrote:
From: Hunter Ellington wb9...@yahoo.com
Subject: [Drakelist] DSP Filters
To: drakelist@zerobeat.net
Date: Saturday, February 5, 2011,
First check out the AC-4. Start
with http://www.wb4hfn.com/DRAKE/DrakeArticles/TechTips/PowerSupplyTroubleshooting.htm
73,Bob WW3QB
--- On Sun, 6/12/11, Windows Live Team wd9...@hotmail.com wrote:
From: Windows Live Team wd9...@hotmail.com
Subject: [Drakelist] AC-4 Issue
To:
Unless you have a peak reading wattmeter what you are seeing is normal.
Non-peak wattmeters cannot keep up with the quickly changing modulation.
73,Bob WW3QB
--- On Tue, 6/21/11, mail.speedy.com.ar lw3...@speedy.com.ar wrote:
From: mail.speedy.com.ar lw3...@speedy.com.ar
Subject: [Drakelist]
Does it still work when the transceive switch is in separate or xmtr? When you
say it will not go into tune what do you mean? No output? No plate current?
Need more info. A wild guess would be the transceive switch wafers.
73,
Bob WW3QB
From: Richard Tucker
I'm looking at it now in the January 1997 QST page 135. Nice. I still use my
C-line as my main station. Still good enough to work the ST0R DXpedition this
week.
73,
Bob WW3QB
I'm wondering if anyone remembers seeing the early 1970's Amateur Electronic
Oops. That should be January 1977 QST.
Subject: Re: [Drakelist] Does Anyone Remember the 1970's AES Ad with Ray
Grenier?
I'm looking at it now in the January 1997 QST page 135. Nice. I still use my
C-line as my main station. Still good enough to work the
That picture was taken much later than the original ad. He does not have that
70's look. :-)
73,
Bob WW3QB
The man and the equipment.
http://www.marcradio.org/rm-1971-03/vanguard-labs.html
Terry
VE3XTM
On 05/08/2011 05:51, Tom Delano wrote:
Ray Grenier
There is a good manual online
at http://www.wb4hfn.com/DRAKE/DrakeManuals/T4XC/Manual_T4XC.htm
The crystal chart starts on Pg-12.
Yes, you have the frequencies right. ICM is the place to go.
73,
Bob WW3QB
From: Henry Foglesong hwfogles...@gmail.com
To:
I've had tubes generate static, but they were mixers. So it can be any tube
doing that. I would swap tubes out ONE at a time.
73,
Bob WW3QB
For about 20 minutes after being turned on, R-4A ehibits static building from
low to high volume over about 10 seconds, followed by a pop, then repeat.
A tiny seed crystal is suspended in a super-saturated solution. That is how
they are pure and the molecules are all aligned. One of the many links on the
subject: http://chemistry.about.com/cs/growingcrystals/a/aa012604.htm
73,
Bob WW3QB
Aren't crystals
The full interview use in the ad is
at http://www.youtube.com/watch?v=x9-F6dbCIHw
There is a 4-line (not C) and MN-4 behind the father's head at 0:58 in.
73,
Bob WW3QB
From: w4...@aol.com w4...@aol.com
To: drakelist@zerobeat.net
Sent: Saturday, October 15,
Apparently her father is N2IXA.
The full interview use in the ad is
at http://www.youtube.com/watch?v=x9-F6dbCIHw
There is a 4-line (not C) and MN-4 behind the father's head at 0:58 in.
73,
Bob WW3QB
From: w4...@aol.com
The TR-3/4 had a fuse lamp between the receiver and antenna to protect the
receiver. Since these were mobile rigs the large whip antennas could hit light
fixtures in garages (my theory).
73,
Bob WW3QB
From: Neil M Califano cchange...@yahoo.com
To:
Replacement capacitor cans for Drakes are available
at http://www.hayseedhamfest.com/capkit.htm
It also shows the specs.
73,
Bob WW3QB
I am in the process of refurbishing a T4XB that has
been significantly modified. (This is more like a detective story and
Those paper sleeves are more than ornamental. Usually the metal can is
grounded, but in the AC-3/4 some of them have high voltages (they are connected
in series). If you look carefully the can is insulated from the chassis. If you
touch a metal can you can get a shock. I hope Hayseed Hamfest
A good first step is use the resistance chart in the manual for the tube
sockets. I would also check the relay.
73,
Bob WW3QB
Curt, before you throw in the towel, have you tried pulling all the non-final
tubes to be sure it's not an internal short in one of them? It's exceedingly
rare in
It's interesting that the pin 6 resistance to ground is so low since it passes
through a 82K resistor. Do the values change if you remove V8? I sense a tube
short.
73,
Bob WW3QB
Well, my nose detected burnt smell in vicinity of T4. R61, a 150ohm 1/2
I still believe that R61 and the AC-4 were both victims of the same failure.
And I still would not trust that 6HS6. Did you recheck the resistances with the
6HS6 removed?
73,
Bob WW3QB
All,
Well my luck or lack thereof continues... I pulled the 6HS6 and
I installed the Drake board in the TR-3. I think you can make your own easily
using a breadboard and a relay socket.
73,
Bob WW3QB
Dale -
The original relay runs from the +250 VDC bus through the 6EV7 to ground. The
relay is a PB R10-Y4-E3-2.5k and is
: Robert Ladden rmlad...@yahoo.com
To: drakelist drakelist@zerobeat.net
Sent: Mon, Dec 26, 2011 11:47 am
Subject: Re: [Drakelist] T-4X relay
I installed the Drake board in the TR-3. I think you can make your own easily
using a breadboard and a relay socket.
73,
Bob WW3QB
- K4OAH
St Charles, IL
Drake 2-B, 2-C/2-NT, 4-A, 4-B, C-Line
and TR-4/C Service Supplement CDs
www.k4oah.com
Robert Ladden wrote:
I see that John Kriner still has some.
http://www.ebay.com/itm/Drake-TR-4-replacement-relay-pcb-instructions-/390339524281
The audio amp in the stock R-4C is already solid state. The Sherwood mod for
the audio amp does make it sound better and removes the big heat source right
below the PTO. That is the only Sherwood mod I made, but I'm considering the
power supply mod. I also installed the Hayseed Hamfest cap
I got a DXCC-RTTY using my T-4XC with AFSK. I agree with this. I have a fan
blowing upwards above the finals. You can run 75 watts because the contest
messages are short.
73,
Bob WW3QB
Bob,
On RTTY, peaks are the same as average. It is continuous duty. I
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
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