I bought my new TR7 28 years ago (as my first rig ever) and am about to do do
my first alignment check. I have re-seated the boards once, and that cured most
of the ills. I have a late-model TR7, along with the maint manual. If I do it
by the book, is there anything I should watch out for
Seems like this may also have to do with the alignment step on the filter
matching transformer ??? br/Markbr/N5KAEa
href=https://overview.mail.yahoo.com?.src=iOS;br/br/Sent from Yahoo Mail
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Good for you Tom !
I would look for a later serial number TR-7, with the A type features. It
may
even be labeled a TR-7A. Anyway, it is a great rig. I started with a used one
about 26 years ago, and mine is still going strong (a little TLC over the years
has kept it that way!). the serial
Try headpones and see if you can hear. If so, try some deoxit on the headphone
jack switching contact. These contacts get dirty from time to time.
Let us know how the progress goes.
73
Mark
N5KAE
From: Charles Ring w...@roadrunner.com
To: drakelist@zerobeat.net
Sent: Mon, September
I think the tr3 just has a direct drive to the rf tune varicap. No reduction.
73
Mark
N5KAE___
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Yes. Sorry i didnt make that clear.
73
Mark
N5KAE___
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A number of years ago I bought about four AC4's, and installed 3-prong computer
cords, with the ground attached to the AC4 chassis. I used the original strain
relief, but carefully cut some of the plastic out of the original, just enough
to accomodate the round cord. They all worked great.
Not sure if any of the threads have mentioned this, but I like the DeOxit Pen.
I think it is lower concentration, and works espcially well on tube pins.
Mark
N5KAE
From: scpmil...@aol.com scpmil...@aol.com
To: drakelist@zerobeat.net
Sent: Sat, December 24, 2011 8:55:37 AM
Subject: Re:
This is a bad thought, but we have all seen the big crushers for wrecked cars.
I wonder if a little crusher exists for radio hulks like this.
Mark
N5KAE
- Original Message
From: Steve Wedge w1es1...@earthlink.net
To: lee pulsa...@embarqmail.com; John Brown
At one point several years ago I checked the patent for deoxit and I remember
it
being a PO/EO copolymer
of some type. Oleic acid is a weakly acidic long-chain carboxylic acid, and as
for the naphtha, I have never
smelled any deoxit that smells like a hydrocarbon solvent. Having said that, I
I think I have a TR-3 or two that has that brand of crystals in the pre-mix
section. They looked stock to me.
Mark
N5KAE
- Original Message
From: Neil M Califano cchange...@yahoo.com
To: Drakelist@zerobeat.net
Sent: Sun, September 18, 2011 2:59:56 PM
Subject: [Drakelist]
He's on QRZ
From: whitebear1...@comcast.net whitebear1...@comcast.net
To: Terry Maurice ve3...@execulink.com
Cc: Drakelist drakelist@zerobeat.net
Sent: Fri, August 5, 2011 8:22:25 PM
Subject: Re: [Drakelist] Does Anyone Remember the 1970's AES Ad with Ray
Grenier?
Wow what a find! That is
Hope there are some 2-C experts out there who can give me some alignment
advice:
First Question: For step A on page 18 of the manual, to center the 50 KHz BFO,
my generator doesn't go down that low, so I set it to 100 KHz and cap-coupled
to
pin 1, V5 and got a audio note, presumably
I have had two separate issues with this switch. Deoxit and working back and
forth a few times solved it.
73
Mark
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25 years ago my first rig was a used Drake TR-7 from Burghardt Amateur Center,
and I still have it. Antenna was a G5RV and a BW 300 watt tuner from Madison
(downtown Houston at the time). Worked the world with it. About 12 years ago
I
started restoring tube gear, and most of you know what
Hello everyone,
I just acquired an RCS-4 antenna switch that works. Does anyone have any
advice
on whether I need to lube the drive motor, and if so, what to use, and how to
do
it? Any other advice on other items I should be concerned about?
Thanks and 73
Mark
N5KAE
My Weller D-550 (240/325 Watt) was easy to find new tips for. It's a powerful
gun that does big jobs well, especially PL-259's. I keep it tinned up, and
this
tip has lasted for about 5 years.
Mark
N5KAE
From: Loren McCullough loren...@verizon.net
To: drakelist@zerobeat.net
Sent: Mon,
I bought both kits, one for the AC4 and HP-23. Sure, there were a couple of
things that I saw as ambiguous, but after careful inspection of the power
supply, and it's schematic, I saw that it was my problem, not the
instructions.
No matter what, I traced everything anyway, making sure all
Yes, to all Drake folks, Merry Christmas and Happy New Year! You're a bunch of
great people.
I am taking some of my time off to organize my tube caddies, and Drake parts to
get ready for 2011.
73
Mark
N5KAE
- Original Message
From: Chuck Grandgent ch...@chuckg.com
To: K9sqg
I echo your good comments. The rebuild is an excellent creation.
73
Mark
N5KAE
From: ph...@aol.com ph...@aol.com
To: drakelist@zerobeat.net
Sent: Sat, November 20, 2010 3:58:03 PM
Subject: [Drakelist] AC-4R
Just a word to anyone interested that the AC-4R power supply rebuild kit
is
Would anyone have an extra 2-NT final tank available, or a junker parts rig
with
an intact tank? I have one that after it shipped to me a couple years ago, had
been cranked in shipping so bad the coil base ceramic fractured. It will
probably still work, but am just checking.
73 to all
I like to use the DeOxit Pen for tube pins, pilot lamps, cinch connector pins,
etc. For relay contacts, I saturate small strips of card stock with deoxit
spray, then run them through (do the same for phone jacks and others that have
a
break/make contact in there. I use the concentrate in the
I had an audio problem about a year agowith my TR-7, where the audio would just
fade out. My first thought was the audio amp chip went out, but I went ahead
and pulled all the boards, deoxit each pin, and reinstalled the boards. also,
I
deoxited all of the plugs, etc. to the digital readout
Yes, I have never found that Deoxit cures those kind of problems on my Drakes
either.
73, Mark, N5KAE
- Original Message
From: Jim Shorney jshor...@inebraska.com
To: Drakelist drakelist@zerobeat.net
Sent: Sun, October 10, 2010 12:10:43 PM
Subject: Re: [Drakelist] TR7 Dead
I agree Bill. The facts are the facts! The new CD's on the 2C and 2-NT are
also excellent. The time and effort taken to compile this information is
awesome, and serves to
keep our Drake equipment running. Of course, I take advantage of Garey's kind
advice too.
73
Mark
N5KAE
I agree with all good things said about Mike's
Upgrades. I used his kits on an AC4 and HP-
23. Work great!
73
Mark
N5KAE
On Sat Jul 10th, 2010 12:31 PM CDT Tom Delano wrote:
Hi Dino,
Congrats on the AC-4R project. Call me paranoid, but this rebuild is the
first thing I do when I get a new
I agree with previous posts about the TR-7. I got mine used when I became a
ham 24 years ago. It started developing an audio problem, and digial readout
problem, but removing the boards, deoxit on the pins, and reseating solved
everything. A touch-up on the alignment and it's a brand new
Bob,
I would first turn everything off, unhook the TR-3 from the power supply, and
look at the frame T/R relay and make sure the contacts are clean. Once they
are clean, I always do some continuity measurements on the XMIT and RCV cathode
lines to make sure they really are making good contact.
relays like this, and it works pretty
well. Just be very careful about bending any of the contact arms !!!
Let's keep the dialog going,
Mark
- Original Message
From: AD5VJ Bob rt...@sbcglobal.net
To: Mark Nace n5...@swbell.net; Drakelist@zerobeat.net
Sent: Sun, January 10, 2010 7:17
, or do I have to take
the relay out in order to clean any at the bottom of the relay.
Bob AD5VJ
-Original Message-
From: Mark Nace [mailto:n5...@swbell.net]
Sent: Sunday, January 10, 2010 6:44 PM
To: AD5VJ Bob; Drakelist@zerobeat.net
Subject: Re: [Drakelist
Ron,
Great comments. I keep my drake rigs covered as well. All that work getting
the chasses cleaned up, i SURE don't want to do it again!!.
73
Happy New Year
Mark
N5KAE
- Original Message
From: Ron wd8...@yahoo.com
To: drakelist@zerobeat.net
Sent: Sat, December 26, 2009
Bob,
CW jack is a normal 1/4 inch phono, as is the speaker jack. Many times, you
will fine a transceiver that has 1/4 inch replacing the narrower mic jack, but
I always change them back. I think you need the grid block keying protocol.
Others will have better comments. How is your TR-3
I agree Jim. My TR-7 was over 25 years old, and I pulled the boards, deoxited
the pins (and all other connectors), band switch, and all my audio, digital
readout, and low receive problems just went away.
73
Mark
N5KAE
- Original Message
From: Jim Shorney jshor...@inebraska.com
Hi,
I just got an RV-7 remote VFO for my TR-7 (has the DR-7). It works well, but
the 100kHz rear dial on the RV-7 is a bit off from where it is supposed to be.
The front dial is okay, and is about right on. Is there an easy way to
reposition the rear dial on the VFO without screwing
I have saved up a few mundane questions for the Drake folks. Instead of
separate emails, I will just ask them all in one:
1. The early AC-3 power supply had some sort of choke filter for the +650 volt
section, right after a bridge rectifier looks like. My buddy has one of these
actually.
John,
I agree. I worked SS CW yesterday with a TR-4, then switched to my TR-7 today
with the 500 Hz filter. The TR-4 was a challenge of course, but it was fun to
just pick out a station, and work him just based on the audio tone, amongst all
of the other signals in the passband!! I agree
Ron, All,
I asked Bill Frost about the 9-NB in a TR-4 of mine a number of years ago. My
question, and his response (below) should be interesting to you. My 34-NB
manual for the kit does not have a photo of the board, just a couple of general
drawings with trimmers, etc. identified for
Hello Drake experts,
I was just wondering if anyone had any experience with subs for the 12BZ6 for a
2-C I have. NOS are pretty pricey. Just a thought
73
Mark
N5KAE
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- Forwarded Message
From: Mark Nace n5...@swbell.net
To: Walker g...@worldnet.att.net
Cc: mark nace n5...@swbell.net
Sent: Saturday, September 5, 2009 10:37:15 AM
Subject: Re: [Drakelist] Which tubes are the right tubes
Phil,
You are feeling the same pain as I have over the years
Mark Nace [EMAIL PROTECTED] made an utterence to the drakelist gang
--
Matt,
I have a TR-3 that I bought as a junker, and R40, 470 ohm, had vaporized.
Replaced it, and as I kind of expected, it also started smoking upon turning
Try to stay away frommethylene
chloride,and especially carbon tet. or chloroform.
73,
de Mark, N5KAE
- Original Message -
From:
[EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Cc: [EMAIL PROTECTED]
Sent: Saturday, August 28, 2004 7:37
PM
Subject: Re: Followup... Re:
Isthe Drake TR-M useful at all for amateur
use? I have never owned one until now. Being channelized, it seems
like it is probably limited in use. Has anyone used one on the ham
bands?
Thanks for your advice and input
73,
Mark
N5KAE
Just for the fun of it, I used a restored TR-3 to
enter the 2003 ARRL frequency measurement test. The results were as
follows:
Measured Freq.
(Hz) Error
(Hz)
Error (ppm)
3,585,250+133.70
37.29
7,050,250
+159.90
22.68
14,050,750-674.30
-47.99
I didn't measure the 15 meter signal.
A couple of years ago at a hamfest, a fellow had a TR-3 still in the
box.mint copper, mint everything. He wanted 300 bucks.nobody bought
it..I still kick myself for not going to an automatic teller and getting
an extra hundred or so to buy it. Anyone else have any stories about the
In the mouser catalog, I only see the 502-S-260 (3-conductor straight).
Don't see any right-angled S-230 (0.206 diam.) plugs. Are they special
purchase or something?
73
Mark, N5KAE
- Original Message -
From: DAN COTSIRILOS [EMAIL PROTECTED]
To: Garey Barrell [EMAIL PROTECTED]
Cc:
I find that the cinch jones connector male pins on
the back of the transceivers get really waxy and makeintermittent contact
over time. I use some isoproyl alcohol on a Q-tip on the male blades, then
use de-oxit, plug in and out about 10 times.that's it. The last time a
problem happened
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