Greetings Drake Aficionados,
I am working on a TR-4C and have run into a new problem (at least new to me)
that is baffling me. The problem involves the TR-4C tune-up. With the XMTR
GAIN at full CCW, I am seeing full full power output of 180 watts on 80M. As
I increase the gain the power output
I have been offered a TR-4C, however it would appear that this is not suitable
for the WARC bands or am I mistaken (likely), also how rare are the noise
blankers.
Ideas?
73 Max
--
I am using the free version of SPAMfighter.
We are a community of 6 million users fighting spam.
SPAMfighter has
The TR-3/4 series transceivers are not usable on any but the original
five bands. The Noise Blanker is quiet rare, and typically sells for
$150-200 IF found.
The 4 Series Twins ARE usable on any frequency between 1.5 and 30 MHz
(except for a narrow range between 5 and 6 MHz and another
Thanks for the info, I'll pass on that then, I'll stick with the twins,
73 Max
--
I am using the free version of SPAMfighter.
We are a community of 6 million users fighting spam.
SPAMfighter has removed 2085 of my spam emails to date.
Get the free SPAMfighter here: http://www.spamfighter.com/len
Loren -
Congratulations! Cold or cracked solder joints are all too common in
gear this old. Finding them is not always easy!
Yeah, that's too bad. Finals are not getting any cheaper. Those RCAs
should last another 25 years as long as you don't try for 10 minutes to
load them into the
Loren,
I've been following this thread and am glad to read that you found the
problems.
FWIW, I had a similar problem with a TR-4C last year. Finally found a
buried connection on a terminal strip that was never soldered! Seems that the
mechanical connection alone got it past QC and
Just to be sure we are not diagnosing the wrong problem
here. When I say the S-meter goes up, it is really the entire
receiver that is affected, it's like a strong signal is being received
and nothing else can be heard.
WA3WZR
___
Drakelist mailing
Loren -
Sure sounds like the RCVR K line (cathodes of V3, V7, V11 and V12) is
not being grounded by the relay contact. The fact that tripping the PTT
a few times clears the problem also points to the relay contacts. This
a normally closed contact, so not very much contact pressure, and so
Thanks for your advice Garey, will try to get to it this
weekend. It is getting worse and keying the mike is not fixing the
problem anymore. The thing is though, I replaced the relay in the
spring when I was doing some general maintenance on the rig, including
rebuilding the AC-4 and fixing the
Loren -
OK. One thought, even with a new relay... If the normally closed fixed
contact is bent up slightly, it may not be making good contact if the
other three normally closed contacts are a little lower.
The RCVR K contact is the only normally closed contact that should be at
chassis
The original relay was the PB one. I still have
it as spare parts. cleaned the contacts and put it back in.
did not solve the problem, so it's going to take some digging with a
voltmeter.
Loren - WA3WZR
At 11:11 PM 9/30/2009, Garey Barrell wrote:
Loren -
OK. One thought, even with a new relay...
...@zerobeat.net] On Behalf Of Garey
Barrell
Sent: Tuesday, September 15, 2009 3:13 PM
To: drakelist
Subject: Re: [Drakelist] TR-4C annoyance
Loren -
A full scale S-Meter is typical of a receiver in Standby, or in the
case
of the TR series, when it's switched to transmit. Standby in
the
transceiver can
Loren -
A full scale S-Meter is typical of a receiver in Standby, or in the case
of the TR series, when it's switched to transmit. Standby in the
transceiver can be approximated by turning the RF GAIN full CCW. Does
the S-Meter go to the same reading in both Standby and fault conditions?
-Original Message-
From: drakelist-boun...@zerobeat.net
[mailto:drakelist-boun...@zerobeat.net] On Behalf Of Garey Barrell
Sent: Tuesday, September 15, 2009 3:13 PM
To: drakelist
Subject: Re: [Drakelist] TR-4C annoyance
Loren -
A full scale S-Meter is typical of a receiver in Standby
goes on. Try replacing the 12AX7.
Regards,
KD8CN
-Original Message-
From: drakelist-boun...@zerobeat.net
[mailto:drakelist-boun...@zerobeat.net] On Behalf Of Garey Barrell
Sent: Tuesday, September 15, 2009 3:13 PM
To: drakelist
Subject: Re: [Drakelist] TR-4C annoyance
Loren
intermittently
and
becomes worse as time goes on. Try replacing the 12AX7.
Regards,
KD8CN
-Original Message-
From: drakelist-boun...@zerobeat.net
[
mailto:drakelist-boun...@zerobeat.net] On Behalf Of Garey
Barrell
Sent: Tuesday, September 15, 2009 3:13 PM
To: drakelist
Subject: Re: [Drakelist] TR-4C
Loren -
You may also have a dirty relay contact. One pole of the relay grounds
the RCVR K, which grounds the receiver cathodes in the Normally Open
contacts. If this contact is dirty, it could also cause what you are
seeing. You can carefully pry off the relay cover and clean the
contacts
Lately, my TR-4C has developed an annoying quirk. Shortly after
turning it on (sometimes immediately, sometimes after 10 minutes or
so), the S meter will go nearly full scale and stay there. Usually
keying the mic several times will stop this and it will return to
normal operation (only has
Loren -
The S-meter current is derived from a bridge that compares the plate
current drawn by V4, V11 and V15 with the current drawn by V17.
From your description, I'd check the cathode resistor and cathode
bypass of V17.
73, Garey - K4OAH
Loren McCullough wrote:
Lately, my TR-4C has
Thanks for the info. C145 does not appear to be
shorted in any of the 4 segments. I am suspecting the power supply
at this point. Using WB0IQK's trouble shooting as a guide here is
what I am seeing:
pin #10 - 710 volts DC, 100mv AC
pin #11 - 285 volts DC, 100mv AC
pin #4 - abt 14Volts AC
pin
Loren -
Those numbers look ok, with the exception of the Bias, as you are
looking at unloaded voltages. Pin 10 will drop to about 650 under
load of 350 mA, Pin 11 will drop to about 260V under load of receive
mode, and Pin 4 will be about 12.6 VAC _at the tube sockets_. The
Bias voltage
It's 27 ohms (RED-VIOLET-BLACK).
Lee, w0vt
- Original Message -
From: Loren McCullough loren...@verizon.net
To: drakelist drakelist@zerobeat.net
Sent: Sunday, April 05, 2009 7:57 PM
Subject: [Drakelist] TR-4C resistor identification help
I just had a resistor on the relay board
Loren -
It's 27 ohms. It's also a _fuse_ indicating that there is a problem
on the +250V bus in the TR-4C. Most likely a shorted electrolytic and
if no other resistors are burned, probably the 20 uF section of C145,
the can electrolytic.
73, Garey - K4OAH
Glen Allen, VA
Drake 2-B, 4-B,
My rig has developed an occassional problem, but only on 20 meters.
Sometimes after switching to 20 and tuning up, I can key the mic and
the transmit power immediately goes to full power and stays there (no
variance in the power while talking and/or data input via SignaLink
USB interface). I
Lee -
You probably know this, but those two crystals were options in the
TR-4C. They were standard in the TR-4, but were deleted, probably as a
cost-cutting measure.
73, Garey - K4OAH
Glen Allen, VA
Drake 2-B, 4-B, C-Line TR-4/C Service Supplement CDs
www.k4oah.com
LEE BAHR wrote:
Well
Sent: Monday, December 08, 2008 8:24 PM
Subject: Re: [Drakelist] TR-4C
Well, I never learn. I saw a TR-4C with a nice front panel, no cabinet
screws, missing one small knob, no relay, burned out 1/2 watt resistor on
relay board, missing 7 small tubes, missing two crystals, and no pilot
lamps
Well now that I have bought this In Need TR-4C, I need some parts. I
ordered some tubes I didn't have on hand plus a new 4 section can
electrolytic made for this radio from Hayseed Hamfest today. (I had
purchased some of Tom's caps for my Heath DX-60A and DX-60B and liked them
very much.
Well, I never learn. I saw a TR-4C with a nice front panel, no cabinet
screws, missing one small knob, no relay, burned out 1/2 watt resistor on
relay board, missing 7 small tubes, missing two crystals, and no pilot lamps
just loose lamp sockets. I also was told the multi section can
some fangle computer do the work for you. Better know as
the labor of love.
73, Ron / WB4HFN
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of LEE
BAHR
Sent: Monday, December 08, 2008 8:24 PM
To: drakelist
Subject: Re: [Drakelist] TR-4C
Well, I never learn
Hello to all on the list. I'm in process of restoring a tr-4c. I'm looking for
the audio/rf gain on/off switch and either a whole cabinet or bottom half of
the cabinet. If anyone can help or point me in a direction it would be greatly
appreciated. Also need the red bottons for the lsb and
Me again, resurrecting my TR-4C from storage.
The internal VFO is sometimes very unstable and sometimes cuts out
altogether, but other times it works fine. I am not sure it is any
tubes, since the RV-4C works fine, and I didn't thing transistors
would do that (just cut out completely).
How does the RV-4C affect the PTT circuit?
Here is my problem. When the RV-4C is not plugged in everything
works as expected, but I can't use my internal VFO at the moment (see
my other thread on the unstable VFO). With the RV-4C plugged in, all
I can get to work reliably is VOX, (don't
I have been off the air for awhile and I am trying to resurrect my
TR-4C/RV-4C from storage. My brother had used the rig up until
several years ago and it was working fine then.
I am having two main issues with the equipment, and I believe they
are related to the VOX and Relay control
it's been way to long for me to remember. I also
stumbled across that I have to have the key out to use SSB (which is why
I couldn't get a transmit).
As the rig warmed up, the problem of kicking out of CW came back and the
XMTR GAIN doesn't have to be up very far before the transmit kicks
off.
PROTECTED] [mailto:[EMAIL PROTECTED]
On Behalf Of Loren McCullough
Sent: Thursday, September 11, 2008 5:22 PM
To: drakelist
Subject: Re: [Drakelist] TR-4C Vox problems
it's been way to long for me to remember. I also stumbled across that I
have to have the key out to use SSB (which is why I couldn't
Hi All
I have a TR-4C Ser No 35599 which I am restoring am looking for the layout of
the PCB on which the Ant + relay is mounted, my unit is very charred now
conductive.
Thank in advance for any help.
Bill VK2ZCV Port Macquarie NSW Australia( QRZ COM is upto date)
Phil,
The S Meter becomes an ALC indicator in transmit.
The VOX delay in CW was never enough in my oppinion. The only way to increase
the delay and have some control over it is by mounting a pot in one of the
extra holes in the back of the TR-4 and some extra capacitance. Check this out
Folks:
Does anyone out there have a suggestion (or two) on how I can tune my Drake
TR-4C for transmitting an easier way other than the manual's method?I do
not have access to a wattmeter or anything like that to put between the TR-4C
and the antenna.
I kind of find the manual's tune-up
Phil,
Its not always easy to see the plate dip on the TR-4 plate meter, especially
at low plate currents. Over time you will get an idea where the controls
normally sit for a given band. I start out by setting the PLATE LOAD and TUNE
controls in a ballpark position. Then I peak the receiver
will be higher in frequency
than the dial indicates.
Hope that helps, and 73
Bob, KD7NM
_
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On
Behalf Of Bent
Sent: Thursday, July 03, 2008 12:51 PM
To: drakelist@zerobeat.net
Subject: [drakelist] TR-4C Help needed. Tune UP problem
GAREY - K4OAH [EMAIL PROTECTED] made an utterance to the drakelist gang
--
Bent -
Boy the internet is slow today. Your message just showed up here!
Anyway, what you are seeing is normal. For tune-up and CW, the Carrier Osc
http://forums.qrz.com/showthread.php?p=1264812#post1264812I'm not going to have time to devote to this rig. I know someone needs another one.73 K4RJJ
Hello
I need some help for my TR-4C which I have bought as beeing OK, but was not.
Hopefully someone are able to give me some useful ideas.
The receiver seems to be OK on all bands.
But something is wrong on the transmitter side.
I have added a table to show what happend if I try to tune on the
To: [EMAIL PROTECTED]
Sent: Sunday, May 25, 2008 5:46 AM
Subject: [drakelist] TR-4C Help needed.
Hello
I need some help for my TR-4C which I have bought as beeing OK, but was not.
Hopefully someone are able to give me some useful ideas.
The receiver seems to be OK on all bands
.
/ Bent
- Original Message -
From: John Pelham
To: [EMAIL PROTECTED]
Sent: Sunday, May 25, 2008 1:16 PM
Subject: Re: [drakelist] TR-4C Help needed.
CW and tune up only work with the sideband switch in the X position. I
believe the behavior you observe is normal. Once tuned up
Gary Poland [EMAIL PROTECTED] made an utterance to the drakelist gang
--
Bent,
Is receive good in those positions? Is the carrier oscillator close to 9
mhz? If you cannot get RF output in the X filter position and receive
!!
I think my TR4C and other tube gear will be with me as long as I live.
David
- Original Message -
From: [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Sent: Tuesday, April 01, 2008 9:28 PM
Subject: Re: [drakelist] TR-4C working again! AND compared to the new stuff
Terry,
I
Jim Shorney [EMAIL PROTECTED] made an utterance to the drakelist gang
--
On Wed, 2 Apr 2008 08:54:22 -0400, David Chris Drake wrote:
Yep! It may be my older ears, but I sure like to listen to the drakes and
other tube radios
To all, thanks for the help given me on the drakelist here. Garey's
suggestion to short the filters and listen to the calibrate signal on both
sidebands
did the trick. Shorting the filter got the rf flowing and listening to the
calibrate signal on both sidebands told me the 9 mhz signal
john [EMAIL PROTECTED] made an utterance to the drakelist gang
--
Hooray!
Good job congratulations... We all learn things by looking over each
others shoulders with these types of things
John K5MO
At 05:14 PM 4/1/2008,
Terry,
Congrats man... Isn't it cool to be able to work on something like that, fix
it and enjoy it again!
Reminds me of when I was a Customer Engineer at IBM working on all that 50's
and 60' technology equipment day in day out... very rewarding and fun... Best
job I ever had.
73,
Lee
Thanks Lee. It is fun to get them going again. This one was a basket case
when I got it with multiple problems. Someone was in it adjusting every can
the wrong way and it had numerous bad tubes in it. Anyway's, it is fun for a
old retired mechanical engineer to be able to save the radio
Terry,
I have the Drake C line and the Collins S line right next to a state of the
art Ten-Tec Orion II (one hell of a radio!) and in general (not contesting on a
crowded band etc) the OLD BOYS hear just about as well, and a pleasure to
operate...
Actually I think the Sherwood R4C hears as
You are right Lee. I sold my Orion because all I used were the Drakes. The
Orion was a nice radio
but not the pleasure to listen to and operate like the Drakes. I have had
Drake Twins in the shack since 1970 and you can't beat them.
73,
I am still working on my TR-4C. I now have the filter problem fixed and in
fact have the correct signal going all the way to the 12BY7 driver tube. I do
not have any signal coming out of the driver to the finals. The tube is good
and I have substituted another with no change. The voltages
Garey Barrell [EMAIL PROTECTED] made an utterance to the drakelist gang
--
Have you checked voltages on V7? Is it being cut off in transmit?
73, Garey - K4OAH
Glen Allen, VA
Drake 2-B, 4-B, C-Line TR-4/C Service Supplement
I will check and get back to you.
In a message dated 3/31/2008 3:34:54 P.M. Eastern Daylight Time,
[EMAIL PROTECTED] writes:
Garey Barrell [EMAIL PROTECTED] made an utterance to the drakelist gang
--
Have you checked
On V7, Pin 7 shows 1.13v receive, 148 transmit and pin 6 shows 250v receive
and transmit.
In a message dated 3/31/2008 3:34:54 P.M. Eastern Daylight Time,
[EMAIL PROTECTED] writes:
Garey Barrell [EMAIL PROTECTED] made an utterance to the drakelist gang
Garey Barrell [EMAIL PROTECTED] made an utterance to the drakelist gang
--
What serial number unit? Pin 6 should have ~100V R or T.
73, Garey - K4OAH
Glen Allen, VA
Drake 2-B, 4-B, C-Line TR-4/C Service Supplement CDs
The S/N is 34323.
In a message dated 3/31/2008 3:53:57 P.M. Eastern Daylight Time,
[EMAIL PROTECTED] writes:
Garey Barrell [EMAIL PROTECTED] made an utterance to the drakelist gang
--
What serial number unit? Pin 6
Garey Barrell [EMAIL PROTECTED] made an utterance to the drakelist gang
--
OK. That's Version 1. V7 circuit is the same though. Voltage divider
on Pin 6, screen of V7, voltage should be ~100V R or T. Likely not the
OK Garey, I must have been on the wrong pin before. The voltages on V7 are
all ok and close to where they should be in R T. I have a scope (Tetronix)
and a Freq. counter. I am testing with the bandswitch in the 20m position. On
pin 2 of V6 I show a freq of 10.400 mhz when I go to T and when
Garey Barrell [EMAIL PROTECTED] made an utterance to the drakelist gang
--
10.400 MHz ??
[EMAIL PROTECTED] wrote:
OK Garey, I must have been on the wrong pin before. The voltages on V7
are all ok and close to where they
It changes when I tune the VFO.
In a message dated 3/31/2008 5:10:49 P.M. Eastern Daylight Time,
[EMAIL PROTECTED] writes:
Garey Barrell [EMAIL PROTECTED] made an utterance to the drakelist gang
--
10.400 MHz ??
That is what the freq meter said
In a message dated 3/31/2008 5:10:49 P.M. Eastern Daylight Time,
[EMAIL PROTECTED] writes:
Garey Barrell [EMAIL PROTECTED] made an utterance to the drakelist gang
--
10.400 MHz ??
Going into the driver... all the mixing is done, you should have a 20 MTR
signal... I'm pretty sure.
73,
Lee
**
Create a Home Theater Like the Pros. Watch the video on AOL
Home.
(http://home.aol.com/diy/home-improvement-eric-stromer?video=15amp;
ncid=aolhom000301)
Yes, I agree. It sounds like the VFO signal doubled.
In a message dated 3/31/2008 5:46:20 P.M. Eastern Daylight Time,
[EMAIL PROTECTED] writes:
Going into the driver... all the mixing is done, you should have a 20 MTR
signal... I'm pretty sure.
73,
Lee
**
Create a Home
Garey Barrell [EMAIL PROTECTED] made an utterance to the drakelist gang
--
Well, that's a problem!
First thing comes to mind is that the Carrier oscillator isn't running,
and you are tuning to the second harmonic of the PTO.
I am seeing about 1.7 or 1.8 v P-P across R77 when the gain is all the way
up in transmit.
In a message dated 3/31/2008 5:49:59 P.M. Eastern Daylight Time,
[EMAIL PROTECTED] writes:
Garey Barrell [EMAIL PROTECTED] made an utterance to the drakelist gang
Garey Barrell [EMAIL PROTECTED] made an utterance to the drakelist gang
--
OK. Bandswitch on 20M, you should have a good strong signal around V1,
Pin 7, at 21.5 MHz.
You should have 16.3 MHz at Pin 6 of V3.
[EMAIL
With the bandswitch on 20m, I get 5200 khz on both V1 and V3 at the pins you
ask me to check. That is in both R T.
In a message dated 3/31/2008 6:26:11 P.M. Eastern Daylight Time,
[EMAIL PROTECTED] writes:
Garey Barrell [EMAIL PROTECTED] made an utterance to the drakelist gang
I thought on 20m, it just mixed the 9 mhz signal with the 5.2 mhz VFO signal
to get to 14 mhz. Isn't that what I should have at those pins?
In a message dated 3/31/2008 6:26:11 P.M. Eastern Daylight Time,
[EMAIL PROTECTED] writes:
Garey Barrell [EMAIL PROTECTED] made an utterance to the
Garey Barrell [EMAIL PROTECTED] made an utterance to the drakelist gang
--
Sorry I was thinking 40M for some reason. That oscillator does
NOT run on 80 or 20M.
You should have the 9.000 MHz signal from the filter(s)
On pin 2 of V4 (6EJ7) I show 10.400 mhz coming in and it changes with the
VFO tuning. I have nothing at pin 7 in T or R. Where does the 9 mhz come in
at?
That may be the problem.
In a message dated 3/31/2008 7:15:45 P.M. Eastern Daylight Time,
[EMAIL PROTECTED] writes:
Garey Barrell
Garey Barrell [EMAIL PROTECTED] made an utterance to the drakelist gang
--
The 9 MHz comes from V15, through T13 (goes out through the winding
across R77, through the switching and filter(s), then into T6 (the
winding across
I have the 9 mhz going into the filter in T but nothing coming out. When I
switch to other side band filter the signal goes thru the other filter. I must
have a bad filter. I think it is the upper one that is used in the transmit
(X) position.
In a message dated 3/31/2008 7:41:17 P.M.
Garey Barrell [EMAIL PROTECTED] made an utterance to the drakelist gang
--
Are you sure your Carrier Oscillator is on frequency? 9.0 MHz. The
filters are positioned on either side of that frequency and if it's NOT
in the
OK checking at the center pot terminal on the carrier balance control, my
freq meter flickers between 8999 and 9000 khz. When I go to T then it flickers
between 9000 and 9001 khz. I am not sure how accurate my meter is but it
appears the 9 mhz signal is OK.
In a message dated 3/31/2008
Oh on the cal signal, I can hear it in both positions of the filters however
it is high pitched in the X position.
In a message dated 3/31/2008 8:06:28 P.M. Eastern Daylight Time,
[EMAIL PROTECTED] writes:
Garey Barrell [EMAIL PROTECTED] made an utterance to the drakelist gang
What's the website address for this INRAD place?
Terry
K7WLD
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On
Behalf Of [EMAIL PROTECTED]
Sent: Thursday, March 27, 2008 4:33 PM
To: [EMAIL PROTECTED]
Subject: Re: [drakelist] TR-4C
I emailed INRAD but they show them as out of stock
address for this INRAD place?
Terry
K7WLD
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On
Behalf Of [EMAIL PROTECTED]
Sent: Thursday, March 27, 2008 4:33 PM
To: [EMAIL PROTECTED]
Subject: Re: [drakelist] TR-4C
I emailed INRAD but they show them as out of stock.
In a message
[EMAIL PROTECTED] (mailto:[EMAIL PROTECTED]) writes:
What’s the website address for this INRAD place? Terry K7WLD
5 seconds on a subject search Terry ? ? ! !
Inrad filters
_www.qth.com/inrad_ (http://www.qth.com/inrad)
**Create a Home Theater Like the Pros. Watch
That is the old address but you can get to the new website from it.
Terry W8NJR
In a message dated 3/28/2008 11:02:55 A.M. Eastern Daylight Time,
[EMAIL PROTECTED] writes:
[EMAIL PROTECTED] (mailto:[EMAIL PROTECTED]) writes:
What’s the website address for this INRAD place? Terry
PROTECTED] On Behalf Of [EMAIL PROTECTED]
Sent: Friday, March 28, 2008 8:02 AM
To: [EMAIL PROTECTED]
Subject: Re: [drakelist] TR-4C
[EMAIL PROTECTED] writes:
What’s the website address for this INRAD place? Terry K7WLD
5 seconds on a subject search Terry ? ? ! !
Inrad filters
]
Subject: Re: [drakelist] TR-4C
[EMAIL PROTECTED] (mailto:[EMAIL PROTECTED]) writes:
What’s the website address for this INRAD place? Terry K7WLD
5 seconds on a subject search Terry ? ? ! !
Inrad filters
_www.qth.com/inrad_ (http://www.qth.com/inrad
Hello:
My TR-4C is still not working on any bands. I have the 9 Mhz
signal going into the lower SSB 9 mhz filter and nothing coming out. The USB
filter does pass the signal ok. So, it looks like I have a bad lower ssb
filter.
Are they available anywhere? I need some help
George Cortez Jr [EMAIL PROTECTED] made an utterance to the drakelist gang
--
inrad but they are pricey
[EMAIL PROTECTED] wrote:
Hello:
My TR-4C is still not working on any bands. I have the 9
Mhz signal
What is the Drake P/N you need???
Lee
**
Create a Home Theater Like the Pros. Watch the video on AOL
Home.
(http://home.aol.com/diy/home-improvement-eric-stromer?video=15amp;
ncid=aolhom000301)
I emailed INRAD but they show them as out of stock.
In a message dated 3/27/2008 6:27:37 P.M. Eastern Daylight Time,
[EMAIL PROTECTED] writes:
George Cortez Jr [EMAIL PROTECTED] made an utterance to the drakelist
gang
Jim Gerke [EMAIL PROTECTED] made an utterance to the drakelist gang
--
Terry,
I have a good Tyco Filters, Inc. LSB filter from a TR4, p/n 9.0-2.1L
Contact me off list if you still need one.
73, Jim K5JG
[EMAIL PROTECTED]
I have a TR-4C that is losing the 9 mhz signal in T14. I assume the diodes
are out. Is this repairable or is the thing junk?
Terry, W8NJR
**Create a Home Theater Like the Pros. Watch the video on AOL
Home.
Garey Barrell [EMAIL PROTECTED] made an utterance to the drakelist gang
--
You can open up the can and replace the diodes. The originals are
Germanium and can be replaced with 1N541s (if you can find them,
unlikely) or with
OK thanks Gary. I thought it might be the diodes. I have 9 mhz signal going
in and nothing coming out of T14. It looks a little tricky getting T14 out but
I think that is the next step. I'll let you know what I find after I get it
open. I better order some diodes!
George Cortez Jr [EMAIL PROTECTED] made an utterance to the drakelist gang
--
I opened mine up and it wasnt that hard, Just be careful of the tiny
wires on the coil
George NE2I
[EMAIL PROTECTED] wrote:
OK thanks Gary. I
Thanks George.
In a message dated 3/22/2008 1:19:29 P.M. Eastern Daylight Time,
[EMAIL PROTECTED] writes:
George Cortez Jr [EMAIL PROTECTED] made an utterance to the drakelist
gang
--
I opened mine up and it wasnt that
the tuned circuits and completely forsake 10 meters.
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Vincent McKever
Sent: Wednesday, December 20, 2006 3:40 PM
To: drakelist@www.zerobeat.net
Subject: [drakelist] TR-4C on 12 Meters
Vincent McKever [EMAIL
Brian [EMAIL PROTECTED] made an utterance to the drakelist gang
--
Hi All,
I am looking for a PWR/RCVR/RF potentiometer.
Has anyone got one which is surplus to requirements or if they are still
being made, a link or address to a
PROTECTED]
[mailto:[EMAIL PROTECTED] Behalf Of Garey Barrell
Sent: Sunday, April 16, 2006 9:09 PM
To: R. Ton
Cc: Drakelist
Subject: Re: [drakelist] TR-4C transmitter troubleshooting
Garey Barrell [EMAIL PROTECTED] made an utterance to the
drakelist gang
)
-Original Message-
From: ALAN CHANDLER [mailto:[EMAIL PROTECTED]
Sent: Monday, April 17, 2006 6:56 PM
To: R. Ton
Subject: Re: [drakelist] TR-4C transmitter troubleshooting
Rob,
Does the grid 1 voltage change when you go from receive to transmit?
Alan
- Original Message
[EMAIL PROTECTED] made an utterance to the drakelist gang
--
For what it's worth, I had lightning blow out 3 6JB6 tubes one time in a
TR-4. I does happen.
Lee
w0vt
Definately agree that all three tubes would have to be open
101 - 200 of 232 matches
Mail list logo
